/* * Copyright (c) 2006-2008 Intel Corporation * Copyright (c) 2007 Dave Airlie * Copyright (c) 2008 Red Hat Inc. * * DRM core CRTC related functions * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. * * Authors: * Keith Packard * Eric Anholt * Dave Airlie * Jesse Barnes */ #include #include #include #include #include #include #include #include #include #include #include #include "drm_crtc_internal.h" #include "drm_internal.h" static struct drm_framebuffer * internal_framebuffer_create(struct drm_device *dev, const struct drm_mode_fb_cmd2 *r, struct drm_file *file_priv); /* Avoid boilerplate. I'm tired of typing. */ #define DRM_ENUM_NAME_FN(fnname, list) \ const char *fnname(int val) \ { \ int i; \ for (i = 0; i < ARRAY_SIZE(list); i++) { \ if (list[i].type == val) \ return list[i].name; \ } \ return "(unknown)"; \ } /* * Global properties */ static const struct drm_prop_enum_list drm_dpms_enum_list[] = { { DRM_MODE_DPMS_ON, "On" }, { DRM_MODE_DPMS_STANDBY, "Standby" }, { DRM_MODE_DPMS_SUSPEND, "Suspend" }, { DRM_MODE_DPMS_OFF, "Off" } }; DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, { DRM_PLANE_TYPE_PRIMARY, "Primary" }, { DRM_PLANE_TYPE_CURSOR, "Cursor" }, }; /* * Optional properties */ static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { { DRM_MODE_SCALE_NONE, "None" }, { DRM_MODE_SCALE_FULLSCREEN, "Full" }, { DRM_MODE_SCALE_CENTER, "Center" }, { DRM_MODE_SCALE_ASPECT, "Full aspect" }, }; static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, }; /* * Non-global properties, but "required" for certain connectors. */ static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ }; DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ }; DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, drm_dvi_i_subconnector_enum_list) static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ }; DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ }; DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, drm_tv_subconnector_enum_list) static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { { DRM_MODE_DIRTY_OFF, "Off" }, { DRM_MODE_DIRTY_ON, "On" }, { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, }; struct drm_conn_prop_enum_list { int type; const char *name; struct ida ida; }; /* * Connector and encoder types. */ static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, { DRM_MODE_CONNECTOR_VGA, "VGA" }, { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, { DRM_MODE_CONNECTOR_Composite, "Composite" }, { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, { DRM_MODE_CONNECTOR_Component, "Component" }, { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, { DRM_MODE_CONNECTOR_TV, "TV" }, { DRM_MODE_CONNECTOR_eDP, "eDP" }, { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, { DRM_MODE_CONNECTOR_DSI, "DSI" }, { DRM_MODE_CONNECTOR_DPI, "DPI" }, }; static const struct drm_prop_enum_list drm_encoder_enum_list[] = { { DRM_MODE_ENCODER_NONE, "None" }, { DRM_MODE_ENCODER_DAC, "DAC" }, { DRM_MODE_ENCODER_TMDS, "TMDS" }, { DRM_MODE_ENCODER_LVDS, "LVDS" }, { DRM_MODE_ENCODER_TVDAC, "TV" }, { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, { DRM_MODE_ENCODER_DSI, "DSI" }, { DRM_MODE_ENCODER_DPMST, "DP MST" }, { DRM_MODE_ENCODER_DPI, "DPI" }, }; static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { { SubPixelUnknown, "Unknown" }, { SubPixelHorizontalRGB, "Horizontal RGB" }, { SubPixelHorizontalBGR, "Horizontal BGR" }, { SubPixelVerticalRGB, "Vertical RGB" }, { SubPixelVerticalBGR, "Vertical BGR" }, { SubPixelNone, "None" }, }; void drm_connector_ida_init(void) { int i; for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) ida_init(&drm_connector_enum_list[i].ida); } void drm_connector_ida_destroy(void) { int i; for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) ida_destroy(&drm_connector_enum_list[i].ida); } /** * drm_get_connector_status_name - return a string for connector status * @status: connector status to compute name of * * In contrast to the other drm_get_*_name functions this one here returns a * const pointer and hence is threadsafe. */ const char *drm_get_connector_status_name(enum drm_connector_status status) { if (status == connector_status_connected) return "connected"; else if (status == connector_status_disconnected) return "disconnected"; else return "unknown"; } EXPORT_SYMBOL(drm_get_connector_status_name); /** * drm_get_subpixel_order_name - return a string for a given subpixel enum * @order: enum of subpixel_order * * Note you could abuse this and return something out of bounds, but that * would be a caller error. No unscrubbed user data should make it here. */ const char *drm_get_subpixel_order_name(enum subpixel_order order) { return drm_subpixel_enum_list[order].name; } EXPORT_SYMBOL(drm_get_subpixel_order_name); /* * Internal function to assign a slot in the object idr and optionally * register the object into the idr. */ static int drm_mode_object_get_reg(struct drm_device *dev, struct drm_mode_object *obj, uint32_t obj_type, bool register_obj, void (*obj_free_cb)(struct kref *kref)) { int ret; mutex_lock(&dev->mode_config.idr_mutex); ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); if (ret >= 0) { /* * Set up the object linking under the protection of the idr * lock so that other users can't see inconsistent state. */ obj->id = ret; obj->type = obj_type; if (obj_free_cb) { obj->free_cb = obj_free_cb; kref_init(&obj->refcount); } } mutex_unlock(&dev->mode_config.idr_mutex); return ret < 0 ? ret : 0; } /** * drm_mode_object_get - allocate a new modeset identifier * @dev: DRM device * @obj: object pointer, used to generate unique ID * @obj_type: object type * * Create a unique identifier based on @ptr in @dev's identifier space. Used * for tracking modes, CRTCs and connectors. Note that despite the _get postfix * modeset identifiers are _not_ reference counted. Hence don't use this for * reference counted modeset objects like framebuffers. * * Returns: * Zero on success, error code on failure. */ int drm_mode_object_get(struct drm_device *dev, struct drm_mode_object *obj, uint32_t obj_type) { return drm_mode_object_get_reg(dev, obj, obj_type, true, NULL); } static void drm_mode_object_register(struct drm_device *dev, struct drm_mode_object *obj) { mutex_lock(&dev->mode_config.idr_mutex); idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); mutex_unlock(&dev->mode_config.idr_mutex); } /** * drm_mode_object_unregister - free a modeset identifer * @dev: DRM device * @object: object to free * * Free @id from @dev's unique identifier pool. * This function can be called multiple times, and guards against * multiple removals. * These modeset identifiers are _not_ reference counted. Hence don't use this * for reference counted modeset objects like framebuffers. */ void drm_mode_object_unregister(struct drm_device *dev, struct drm_mode_object *object) { mutex_lock(&dev->mode_config.idr_mutex); if (object->id) { idr_remove(&dev->mode_config.crtc_idr, object->id); object->id = 0; } mutex_unlock(&dev->mode_config.idr_mutex); } static struct drm_mode_object *_object_find(struct drm_device *dev, uint32_t id, uint32_t type) { struct drm_mode_object *obj = NULL; mutex_lock(&dev->mode_config.idr_mutex); obj = idr_find(&dev->mode_config.crtc_idr, id); if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) obj = NULL; if (obj && obj->id != id) obj = NULL; if (obj && obj->free_cb) { if (!kref_get_unless_zero(&obj->refcount)) obj = NULL; } mutex_unlock(&dev->mode_config.idr_mutex); return obj; } /** * drm_mode_object_find - look up a drm object with static lifetime * @dev: drm device * @id: id of the mode object * @type: type of the mode object * * This function is used to look up a modeset object. It will acquire a * reference for reference counted objects. This reference must be dropped again * by callind drm_mode_object_unreference(). */ struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, uint32_t id, uint32_t type) { struct drm_mode_object *obj = NULL; obj = _object_find(dev, id, type); return obj; } EXPORT_SYMBOL(drm_mode_object_find); /** * drm_mode_object_unreference - decr the object refcnt * @obj: mode_object * * This functions decrements the object's refcount if it is a refcounted modeset * object. It is a no-op on any other object. This is used to drop references * acquired with drm_mode_object_reference(). */ void drm_mode_object_unreference(struct drm_mode_object *obj) { if (obj->free_cb) { DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, atomic_read(&obj->refcount.refcount)); kref_put(&obj->refcount, obj->free_cb); } } EXPORT_SYMBOL(drm_mode_object_unreference); /** * drm_mode_object_reference - incr the object refcnt * @obj: mode_object * * This functions increments the object's refcount if it is a refcounted modeset * object. It is a no-op on any other object. References should be dropped again * by calling drm_mode_object_unreference(). */ void drm_mode_object_reference(struct drm_mode_object *obj) { if (obj->free_cb) { DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, atomic_read(&obj->refcount.refcount)); kref_get(&obj->refcount); } } EXPORT_SYMBOL(drm_mode_object_reference); /** * drm_crtc_force_disable - Forcibly turn off a CRTC * @crtc: CRTC to turn off * * Returns: * Zero on success, error code on failure. */ int drm_crtc_force_disable(struct drm_crtc *crtc) { struct drm_mode_set set = { .crtc = crtc, }; return drm_mode_set_config_internal(&set); } EXPORT_SYMBOL(drm_crtc_force_disable); /** * drm_crtc_force_disable_all - Forcibly turn off all enabled CRTCs * @dev: DRM device whose CRTCs to turn off * * Drivers may want to call this on unload to ensure that all displays are * unlit and the GPU is in a consistent, low power state. Takes modeset locks. * * Returns: * Zero on success, error code on failure. */ int drm_crtc_force_disable_all(struct drm_device *dev) { struct drm_crtc *crtc; int ret = 0; drm_modeset_lock_all(dev); drm_for_each_crtc(crtc, dev) if (crtc->enabled) { ret = drm_crtc_force_disable(crtc); if (ret) goto out; } out: drm_modeset_unlock_all(dev); return ret; } EXPORT_SYMBOL(drm_crtc_force_disable_all); static void drm_framebuffer_free(struct kref *kref) { struct drm_framebuffer *fb = container_of(kref, struct drm_framebuffer, base.refcount); struct drm_device *dev = fb->dev; /* * The lookup idr holds a weak reference, which has not necessarily been * removed at this point. Check for that. */ drm_mode_object_unregister(dev, &fb->base); fb->funcs->destroy(fb); } /** * drm_framebuffer_init - initialize a framebuffer * @dev: DRM device * @fb: framebuffer to be initialized * @funcs: ... with these functions * * Allocates an ID for the framebuffer's parent mode object, sets its mode * functions & device file and adds it to the master fd list. * * IMPORTANT: * This functions publishes the fb and makes it available for concurrent access * by other users. Which means by this point the fb _must_ be fully set up - * since all the fb attributes are invariant over its lifetime, no further * locking but only correct reference counting is required. * * Returns: * Zero on success, error code on failure. */ int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, const struct drm_framebuffer_funcs *funcs) { int ret; INIT_LIST_HEAD(&fb->filp_head); fb->dev = dev; fb->funcs = funcs; ret = drm_mode_object_get_reg(dev, &fb->base, DRM_MODE_OBJECT_FB, false, drm_framebuffer_free); if (ret) goto out; mutex_lock(&dev->mode_config.fb_lock); dev->mode_config.num_fb++; list_add(&fb->head, &dev->mode_config.fb_list); mutex_unlock(&dev->mode_config.fb_lock); drm_mode_object_register(dev, &fb->base); out: return ret; } EXPORT_SYMBOL(drm_framebuffer_init); /** * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference * @dev: drm device * @id: id of the fb object * * If successful, this grabs an additional reference to the framebuffer - * callers need to make sure to eventually unreference the returned framebuffer * again, using @drm_framebuffer_unreference. */ struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, uint32_t id) { struct drm_mode_object *obj; struct drm_framebuffer *fb = NULL; obj = _object_find(dev, id, DRM_MODE_OBJECT_FB); if (obj) fb = obj_to_fb(obj); return fb; } EXPORT_SYMBOL(drm_framebuffer_lookup); /** * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr * @fb: fb to unregister * * Drivers need to call this when cleaning up driver-private framebuffers, e.g. * those used for fbdev. Note that the caller must hold a reference of it's own, * i.e. the object may not be destroyed through this call (since it'll lead to a * locking inversion). */ void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) { struct drm_device *dev; if (!fb) return; dev = fb->dev; /* Mark fb as reaped and drop idr ref. */ drm_mode_object_unregister(dev, &fb->base); } EXPORT_SYMBOL(drm_framebuffer_unregister_private); /** * drm_framebuffer_cleanup - remove a framebuffer object * @fb: framebuffer to remove * * Cleanup framebuffer. This function is intended to be used from the drivers * ->destroy callback. It can also be used to clean up driver private * framebuffers embedded into a larger structure. * * Note that this function does not remove the fb from active usuage - if it is * still used anywhere, hilarity can ensue since userspace could call getfb on * the id and get back -EINVAL. Obviously no concern at driver unload time. * * Also, the framebuffer will not be removed from the lookup idr - for * user-created framebuffers this will happen in in the rmfb ioctl. For * driver-private objects (e.g. for fbdev) drivers need to explicitly call * drm_framebuffer_unregister_private. */ void drm_framebuffer_cleanup(struct drm_framebuffer *fb) { struct drm_device *dev = fb->dev; mutex_lock(&dev->mode_config.fb_lock); list_del(&fb->head); dev->mode_config.num_fb--; mutex_unlock(&dev->mode_config.fb_lock); } EXPORT_SYMBOL(drm_framebuffer_cleanup); /** * drm_framebuffer_remove - remove and unreference a framebuffer object * @fb: framebuffer to remove * * Scans all the CRTCs and planes in @dev's mode_config. If they're * using @fb, removes it, setting it to NULL. Then drops the reference to the * passed-in framebuffer. Might take the modeset locks. * * Note that this function optimizes the cleanup away if the caller holds the * last reference to the framebuffer. It is also guaranteed to not take the * modeset locks in this case. */ void drm_framebuffer_remove(struct drm_framebuffer *fb) { struct drm_device *dev; struct drm_crtc *crtc; struct drm_plane *plane; if (!fb) return; dev = fb->dev; WARN_ON(!list_empty(&fb->filp_head)); /* * drm ABI mandates that we remove any deleted framebuffers from active * useage. But since most sane clients only remove framebuffers they no * longer need, try to optimize this away. * * Since we're holding a reference ourselves, observing a refcount of 1 * means that we're the last holder and can skip it. Also, the refcount * can never increase from 1 again, so we don't need any barriers or * locks. * * Note that userspace could try to race with use and instate a new * usage _after_ we've cleared all current ones. End result will be an * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot * in this manner. */ if (drm_framebuffer_read_refcount(fb) > 1) { drm_modeset_lock_all(dev); /* remove from any CRTC */ drm_for_each_crtc(crtc, dev) { if (crtc->primary->fb == fb) { /* should turn off the crtc */ if (drm_crtc_force_disable(crtc)) DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); } } drm_for_each_plane(plane, dev) { if (plane->fb == fb) drm_plane_force_disable(plane); } drm_modeset_unlock_all(dev); } drm_framebuffer_unreference(fb); } EXPORT_SYMBOL(drm_framebuffer_remove); DEFINE_WW_CLASS(crtc_ww_class); static unsigned int drm_num_crtcs(struct drm_device *dev) { unsigned int num = 0; struct drm_crtc *tmp; drm_for_each_crtc(tmp, dev) { num++; } return num; } static int drm_crtc_register_all(struct drm_device *dev) { struct drm_crtc *crtc; int ret = 0; drm_for_each_crtc(crtc, dev) { if (crtc->funcs->late_register) ret = crtc->funcs->late_register(crtc); if (ret) return ret; } return 0; } static void drm_crtc_unregister_all(struct drm_device *dev) { struct drm_crtc *crtc; drm_for_each_crtc(crtc, dev) { if (crtc->funcs->early_unregister) crtc->funcs->early_unregister(crtc); } } /** * drm_crtc_init_with_planes - Initialise a new CRTC object with * specified primary and cursor planes. * @dev: DRM device * @crtc: CRTC object to init * @primary: Primary plane for CRTC * @cursor: Cursor plane for CRTC * @funcs: callbacks for the new CRTC * @name: printf style format string for the CRTC name, or NULL for default name * * Inits a new object created as base part of a driver crtc object. * * Returns: * Zero on success, error code on failure. */ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, struct drm_plane *primary, struct drm_plane *cursor, const struct drm_crtc_funcs *funcs, const char *name, ...) { struct drm_mode_config *config = &dev->mode_config; int ret; WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); crtc->dev = dev; crtc->funcs = funcs; INIT_LIST_HEAD(&crtc->commit_list); spin_lock_init(&crtc->commit_lock); drm_modeset_lock_init(&crtc->mutex); ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); if (ret) return ret; if (name) { va_list ap; va_start(ap, name); crtc->name = kvasprintf(GFP_KERNEL, name, ap); va_end(ap); } else { crtc->name = kasprintf(GFP_KERNEL, "crtc-%d", drm_num_crtcs(dev)); } if (!crtc->name) { drm_mode_object_unregister(dev, &crtc->base); return -ENOMEM; } crtc->base.properties = &crtc->properties; list_add_tail(&crtc->head, &config->crtc_list); crtc->index = config->num_crtc++; crtc->primary = primary; crtc->cursor = cursor; if (primary) primary->possible_crtcs = 1 << drm_crtc_index(crtc); if (cursor) cursor->possible_crtcs = 1 << drm_crtc_index(crtc); if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { drm_object_attach_property(&crtc->base, config->prop_active, 0); drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); } return 0; } EXPORT_SYMBOL(drm_crtc_init_with_planes); /** * drm_crtc_cleanup - Clean up the core crtc usage * @crtc: CRTC to cleanup * * This function cleans up @crtc and removes it from the DRM mode setting * core. Note that the function does *not* free the crtc structure itself, * this is the responsibility of the caller. */ void drm_crtc_cleanup(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; /* Note that the crtc_list is considered to be static; should we * remove the drm_crtc at runtime we would have to decrement all * the indices on the drm_crtc after us in the crtc_list. */ kfree(crtc->gamma_store); crtc->gamma_store = NULL; drm_modeset_lock_fini(&crtc->mutex); drm_mode_object_unregister(dev, &crtc->base); list_del(&crtc->head); dev->mode_config.num_crtc--; WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); if (crtc->state && crtc->funcs->atomic_destroy_state) crtc->funcs->atomic_destroy_state(crtc, crtc->state); kfree(crtc->name); memset(crtc, 0, sizeof(*crtc)); } EXPORT_SYMBOL(drm_crtc_cleanup); /* * drm_mode_remove - remove and free a mode * @connector: connector list to modify * @mode: mode to remove * * Remove @mode from @connector's mode list, then free it. */ static void drm_mode_remove(struct drm_connector *connector, struct drm_display_mode *mode) { list_del(&mode->head); drm_mode_destroy(connector->dev, mode); } /** * drm_display_info_set_bus_formats - set the supported bus formats * @info: display info to store bus formats in * @formats: array containing the supported bus formats * @num_formats: the number of entries in the fmts array * * Store the supported bus formats in display info structure. * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for * a full list of available formats. */ int drm_display_info_set_bus_formats(struct drm_display_info *info, const u32 *formats, unsigned int num_formats) { u32 *fmts = NULL; if (!formats && num_formats) return -EINVAL; if (formats && num_formats) { fmts = kmemdup(formats, sizeof(*formats) * num_formats, GFP_KERNEL); if (!fmts) return -ENOMEM; } kfree(info->bus_formats); info->bus_formats = fmts; info->num_bus_formats = num_formats; return 0; } EXPORT_SYMBOL(drm_display_info_set_bus_formats); /** * drm_connector_get_cmdline_mode - reads the user's cmdline mode * @connector: connector to quwery * * The kernel supports per-connector configration of its consoles through * use of the video= parameter. This function parses that option and * extracts the user's specified mode (or enable/disable status) for a * particular connector. This is typically only used during the early fbdev * setup. */ static void drm_connector_get_cmdline_mode(struct drm_connector *connector) { struct drm_cmdline_mode *mode = &connector->cmdline_mode; char *option = NULL; if (fb_get_options(connector->name, &option)) return; if (!drm_mode_parse_command_line_for_connector(option, connector, mode)) return; if (mode->force) { const char *s; switch (mode->force) { case DRM_FORCE_OFF: s = "OFF"; break; case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break; default: case DRM_FORCE_ON: s = "ON"; break; } DRM_INFO("forcing %s connector %s\n", connector->name, s); connector->force = mode->force; } DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", connector->name, mode->xres, mode->yres, mode->refresh_specified ? mode->refresh : 60, mode->rb ? " reduced blanking" : "", mode->margins ? " with margins" : "", mode->interlace ? " interlaced" : ""); } static void drm_connector_free(struct kref *kref) { struct drm_connector *connector = container_of(kref, struct drm_connector, base.refcount); struct drm_device *dev = connector->dev; drm_mode_object_unregister(dev, &connector->base); connector->funcs->destroy(connector); } /** * drm_connector_init - Init a preallocated connector * @dev: DRM device * @connector: the connector to init * @funcs: callbacks for this connector * @connector_type: user visible type of the connector * * Initialises a preallocated connector. Connectors should be * subclassed as part of driver connector objects. * * Returns: * Zero on success, error code on failure. */ int drm_connector_init(struct drm_device *dev, struct drm_connector *connector, const struct drm_connector_funcs *funcs, int connector_type) { struct drm_mode_config *config = &dev->mode_config; int ret; struct ida *connector_ida = &drm_connector_enum_list[connector_type].ida; drm_modeset_lock_all(dev); ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false, drm_connector_free); if (ret) goto out_unlock; connector->base.properties = &connector->properties; connector->dev = dev; connector->funcs = funcs; ret = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL); if (ret < 0) goto out_put; connector->index = ret; ret = 0; connector->connector_type = connector_type; connector->connector_type_id = ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); if (connector->connector_type_id < 0) { ret = connector->connector_type_id; goto out_put_id; } connector->name = kasprintf(GFP_KERNEL, "%s-%d", drm_connector_enum_list[connector_type].name, connector->connector_type_id); if (!connector->name) { ret = -ENOMEM; goto out_put_type_id; } INIT_LIST_HEAD(&connector->probed_modes); INIT_LIST_HEAD(&connector->modes); connector->edid_blob_ptr = NULL; connector->status = connector_status_unknown; drm_connector_get_cmdline_mode(connector); /* We should add connectors at the end to avoid upsetting the connector * index too much. */ list_add_tail(&connector->head, &config->connector_list); config->num_connector++; if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) drm_object_attach_property(&connector->base, config->edid_property, 0); drm_object_attach_property(&connector->base, config->dpms_property, 0); if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); } connector->debugfs_entry = NULL; out_put_type_id: if (ret) ida_remove(connector_ida, connector->connector_type_id); out_put_id: if (ret) ida_remove(&config->connector_ida, connector->index); out_put: if (ret) drm_mode_object_unregister(dev, &connector->base); out_unlock: drm_modeset_unlock_all(dev); return ret; } EXPORT_SYMBOL(drm_connector_init); /** * drm_connector_cleanup - cleans up an initialised connector * @connector: connector to cleanup * * Cleans up the connector but doesn't free the object. */ void drm_connector_cleanup(struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct drm_display_mode *mode, *t; /* The connector should have been removed from userspace long before * it is finally destroyed. */ if (WARN_ON(connector->registered)) drm_connector_unregister(connector); if (connector->tile_group) { drm_mode_put_tile_group(dev, connector->tile_group); connector->tile_group = NULL; } list_for_each_entry_safe(mode, t, &connector->probed_modes, head) drm_mode_remove(connector, mode); list_for_each_entry_safe(mode, t, &connector->modes, head) drm_mode_remove(connector, mode); ida_remove(&drm_connector_enum_list[connector->connector_type].ida, connector->connector_type_id); ida_remove(&dev->mode_config.connector_ida, connector->index); kfree(connector->display_info.bus_formats); drm_mode_object_unregister(dev, &connector->base); kfree(connector->name); connector->name = NULL; list_del(&connector->head); dev->mode_config.num_connector--; WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); if (connector->state && connector->funcs->atomic_destroy_state) connector->funcs->atomic_destroy_state(connector, connector->state); memset(connector, 0, sizeof(*connector)); } EXPORT_SYMBOL(drm_connector_cleanup); /** * drm_connector_register - register a connector * @connector: the connector to register * * Register userspace interfaces for a connector * * Returns: * Zero on success, error code on failure. */ int drm_connector_register(struct drm_connector *connector) { int ret; if (connector->registered) return 0; ret = drm_sysfs_connector_add(connector); if (ret) return ret; ret = drm_debugfs_connector_add(connector); if (ret) { goto err_sysfs; } if (connector->funcs->late_register) { ret = connector->funcs->late_register(connector); if (ret) goto err_debugfs; } drm_mode_object_register(connector->dev, &connector->base); connector->registered = true; return 0; err_debugfs: drm_debugfs_connector_remove(connector); err_sysfs: drm_sysfs_connector_remove(connector); return ret; } EXPORT_SYMBOL(drm_connector_register); /** * drm_connector_unregister - unregister a connector * @connector: the connector to unregister * * Unregister userspace interfaces for a connector */ void drm_connector_unregister(struct drm_connector *connector) { if (!connector->registered) return; if (connector->funcs->early_unregister) connector->funcs->early_unregister(connector); drm_sysfs_connector_remove(connector); drm_debugfs_connector_remove(connector); connector->registered = false; } EXPORT_SYMBOL(drm_connector_unregister); static void drm_connector_unregister_all(struct drm_device *dev) { struct drm_connector *connector; /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ list_for_each_entry(connector, &dev->mode_config.connector_list, head) drm_connector_unregister(connector); } static int drm_connector_register_all(struct drm_device *dev) { struct drm_connector *connector; int ret; /* FIXME: taking the mode config mutex ends up in a clash with * fbcon/backlight registration */ list_for_each_entry(connector, &dev->mode_config.connector_list, head) { ret = drm_connector_register(connector); if (ret) goto err; } return 0; err: mutex_unlock(&dev->mode_config.mutex); drm_connector_unregister_all(dev); return ret; } static int drm_encoder_register_all(struct drm_device *dev) { struct drm_encoder *encoder; int ret = 0; drm_for_each_encoder(encoder, dev) { if (encoder->funcs->late_register) ret = encoder->funcs->late_register(encoder); if (ret) return ret; } return 0; } static void drm_encoder_unregister_all(struct drm_device *dev) { struct drm_encoder *encoder; drm_for_each_encoder(encoder, dev) { if (encoder->funcs->early_unregister) encoder->funcs->early_unregister(encoder); } } /** * drm_encoder_init - Init a preallocated encoder * @dev: drm device * @encoder: the encoder to init * @funcs: callbacks for this encoder * @encoder_type: user visible type of the encoder * @name: printf style format string for the encoder name, or NULL for default name * * Initialises a preallocated encoder. Encoder should be * subclassed as part of driver encoder objects. * * Returns: * Zero on success, error code on failure. */ int drm_encoder_init(struct drm_device *dev, struct drm_encoder *encoder, const struct drm_encoder_funcs *funcs, int encoder_type, const char *name, ...) { int ret; drm_modeset_lock_all(dev); ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); if (ret) goto out_unlock; encoder->dev = dev; encoder->encoder_type = encoder_type; encoder->funcs = funcs; if (name) { va_list ap; va_start(ap, name); encoder->name = kvasprintf(GFP_KERNEL, name, ap); va_end(ap); } else { encoder->name = kasprintf(GFP_KERNEL, "%s-%d", drm_encoder_enum_list[encoder_type].name, encoder->base.id); } if (!encoder->name) { ret = -ENOMEM; goto out_put; } list_add_tail(&encoder->head, &dev->mode_config.encoder_list); encoder->index = dev->mode_config.num_encoder++; out_put: if (ret) drm_mode_object_unregister(dev, &encoder->base); out_unlock: drm_modeset_unlock_all(dev); return ret; } EXPORT_SYMBOL(drm_encoder_init); /** * drm_encoder_cleanup - cleans up an initialised encoder * @encoder: encoder to cleanup * * Cleans up the encoder but doesn't free the object. */ void drm_encoder_cleanup(struct drm_encoder *encoder) { struct drm_device *dev = encoder->dev; /* Note that the encoder_list is considered to be static; should we * remove the drm_encoder at runtime we would have to decrement all * the indices on the drm_encoder after us in the encoder_list. */ drm_modeset_lock_all(dev); drm_mode_object_unregister(dev, &encoder->base); kfree(encoder->name); list_del(&encoder->head); dev->mode_config.num_encoder--; drm_modeset_unlock_all(dev); memset(encoder, 0, sizeof(*encoder)); } EXPORT_SYMBOL(drm_encoder_cleanup); static unsigned int drm_num_planes(struct drm_device *dev) { unsigned int num = 0; struct drm_plane *tmp; drm_for_each_plane(tmp, dev) { num++; } return num; } /** * drm_universal_plane_init - Initialize a new universal plane object * @dev: DRM device * @plane: plane object to init * @possible_crtcs: bitmask of possible CRTCs * @funcs: callbacks for the new plane * @formats: array of supported formats (%DRM_FORMAT_*) * @format_count: number of elements in @formats * @type: type of plane (overlay, primary, cursor) * @name: printf style format string for the plane name, or NULL for default name * * Initializes a plane object of type @type. * * Returns: * Zero on success, error code on failure. */ int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, unsigned long possible_crtcs, const struct drm_plane_funcs *funcs, const uint32_t *formats, unsigned int format_count, enum drm_plane_type type, const char *name, ...) { struct drm_mode_config *config = &dev->mode_config; int ret; ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); if (ret) return ret; drm_modeset_lock_init(&plane->mutex); plane->base.properties = &plane->properties; plane->dev = dev; plane->funcs = funcs; plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), GFP_KERNEL); if (!plane->format_types) { DRM_DEBUG_KMS("out of memory when allocating plane\n"); drm_mode_object_unregister(dev, &plane->base); return -ENOMEM; } if (name) { va_list ap; va_start(ap, name); plane->name = kvasprintf(GFP_KERNEL, name, ap); va_end(ap); } else { plane->name = kasprintf(GFP_KERNEL, "plane-%d", drm_num_planes(dev)); } if (!plane->name) { kfree(plane->format_types); drm_mode_object_unregister(dev, &plane->base); return -ENOMEM; } memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); plane->format_count = format_count; plane->possible_crtcs = possible_crtcs; plane->type = type; list_add_tail(&plane->head, &config->plane_list); plane->index = config->num_total_plane++; if (plane->type == DRM_PLANE_TYPE_OVERLAY) config->num_overlay_plane++; drm_object_attach_property(&plane->base, config->plane_type_property, plane->type); if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { drm_object_attach_property(&plane->base, config->prop_fb_id, 0); drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); drm_object_attach_property(&plane->base, config->prop_src_x, 0); drm_object_attach_property(&plane->base, config->prop_src_y, 0); drm_object_attach_property(&plane->base, config->prop_src_w, 0); drm_object_attach_property(&plane->base, config->prop_src_h, 0); } return 0; } EXPORT_SYMBOL(drm_universal_plane_init); static int drm_plane_register_all(struct drm_device *dev) { struct drm_plane *plane; int ret = 0; drm_for_each_plane(plane, dev) { if (plane->funcs->late_register) ret = plane->funcs->late_register(plane); if (ret) return ret; } return 0; } static void drm_plane_unregister_all(struct drm_device *dev) { struct drm_plane *plane; drm_for_each_plane(plane, dev) { if (plane->funcs->early_unregister) plane->funcs->early_unregister(plane); } } /** * drm_plane_init - Initialize a legacy plane * @dev: DRM device * @plane: plane object to init * @possible_crtcs: bitmask of possible CRTCs * @funcs: callbacks for the new plane * @formats: array of supported formats (%DRM_FORMAT_*) * @format_count: number of elements in @formats * @is_primary: plane type (primary vs overlay) * * Legacy API to initialize a DRM plane. * * New drivers should call drm_universal_plane_init() instead. * * Returns: * Zero on success, error code on failure. */ int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, unsigned long possible_crtcs, const struct drm_plane_funcs *funcs, const uint32_t *formats, unsigned int format_count, bool is_primary) { enum drm_plane_type type; type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, formats, format_count, type, NULL); } EXPORT_SYMBOL(drm_plane_init); /** * drm_plane_cleanup - Clean up the core plane usage * @plane: plane to cleanup * * This function cleans up @plane and removes it from the DRM mode setting * core. Note that the function does *not* free the plane structure itself, * this is the responsibility of the caller. */ void drm_plane_cleanup(struct drm_plane *plane) { struct drm_device *dev = plane->dev; drm_modeset_lock_all(dev); kfree(plane->format_types); drm_mode_object_unregister(dev, &plane->base); BUG_ON(list_empty(&plane->head)); /* Note that the plane_list is considered to be static; should we * remove the drm_plane at runtime we would have to decrement all * the indices on the drm_plane after us in the plane_list. */ list_del(&plane->head); dev->mode_config.num_total_plane--; if (plane->type == DRM_PLANE_TYPE_OVERLAY) dev->mode_config.num_overlay_plane--; drm_modeset_unlock_all(dev); WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); if (plane->state && plane->funcs->atomic_destroy_state) plane->funcs->atomic_destroy_state(plane, plane->state); kfree(plane->name); memset(plane, 0, sizeof(*plane)); } EXPORT_SYMBOL(drm_plane_cleanup); /** * drm_plane_from_index - find the registered plane at an index * @dev: DRM device * @idx: index of registered plane to find for * * Given a plane index, return the registered plane from DRM device's * list of planes with matching index. */ struct drm_plane * drm_plane_from_index(struct drm_device *dev, int idx) { struct drm_plane *plane; drm_for_each_plane(plane, dev) if (idx == plane->index) return plane; return NULL; } EXPORT_SYMBOL(drm_plane_from_index); /** * drm_plane_force_disable - Forcibly disable a plane * @plane: plane to disable * * Forces the plane to be disabled. * * Used when the plane's current framebuffer is destroyed, * and when restoring fbdev mode. */ void drm_plane_force_disable(struct drm_plane *plane) { int ret; if (!plane->fb) return; plane->old_fb = plane->fb; ret = plane->funcs->disable_plane(plane); if (ret) { DRM_ERROR("failed to disable plane with busy fb\n"); plane->old_fb = NULL; return; } /* disconnect the plane from the fb and crtc: */ drm_framebuffer_unreference(plane->old_fb); plane->old_fb = NULL; plane->fb = NULL; plane->crtc = NULL; } EXPORT_SYMBOL(drm_plane_force_disable); int drm_modeset_register_all(struct drm_device *dev) { int ret; ret = drm_plane_register_all(dev); if (ret) goto err_plane; ret = drm_crtc_register_all(dev); if (ret) goto err_crtc; ret = drm_encoder_register_all(dev); if (ret) goto err_encoder; ret = drm_connector_register_all(dev); if (ret) goto err_connector; return 0; err_connector: drm_encoder_unregister_all(dev); err_encoder: drm_crtc_unregister_all(dev); err_crtc: drm_plane_unregister_all(dev); err_plane: return ret; } void drm_modeset_unregister_all(struct drm_device *dev) { drm_connector_unregister_all(dev); drm_encoder_unregister_all(dev); drm_crtc_unregister_all(dev); drm_plane_unregister_all(dev); } static int drm_mode_create_standard_properties(struct drm_device *dev) { struct drm_property *prop; /* * Standard properties (apply to all connectors) */ prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | DRM_MODE_PROP_IMMUTABLE, "EDID", 0); if (!prop) return -ENOMEM; dev->mode_config.edid_property = prop; prop = drm_property_create_enum(dev, 0, "DPMS", drm_dpms_enum_list, ARRAY_SIZE(drm_dpms_enum_list)); if (!prop) return -ENOMEM; dev->mode_config.dpms_property = prop; prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | DRM_MODE_PROP_IMMUTABLE, "PATH", 0); if (!prop) return -ENOMEM; dev->mode_config.path_property = prop; prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | DRM_MODE_PROP_IMMUTABLE, "TILE", 0); if (!prop) return -ENOMEM; dev->mode_config.tile_property = prop; prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, "type", drm_plane_type_enum_list, ARRAY_SIZE(drm_plane_type_enum_list)); if (!prop) return -ENOMEM; dev->mode_config.plane_type_property = prop; prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, "SRC_X", 0, UINT_MAX); if (!prop) return -ENOMEM; dev->mode_config.prop_src_x = prop; prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, "SRC_Y", 0, UINT_MAX); if (!prop) return -ENOMEM; dev->mode_config.prop_src_y = prop; prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, "SRC_W", 0, UINT_MAX); if (!prop) return -ENOMEM; dev->mode_config.prop_src_w = prop; prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, "SRC_H", 0, UINT_MAX); if (!prop) return -ENOMEM; dev->mode_config.prop_src_h = prop; prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, "CRTC_X", INT_MIN, INT_MAX); if (!prop) return -ENOMEM; dev->mode_config.prop_crtc_x = prop; prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, "CRTC_Y", INT_MIN, INT_MAX); if (!prop) return -ENOMEM; dev->mode_config.prop_crtc_y = prop; prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, "CRTC_W", 0, INT_MAX); if (!prop) return -ENOMEM; dev->mode_config.prop_crtc_w = prop; prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, "CRTC_H", 0, INT_MAX); if (!prop) return -ENOMEM; dev->mode_config.prop_crtc_h = prop; prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, "FB_ID", DRM_MODE_OBJECT_FB); if (!prop) return -ENOMEM; dev->mode_config.prop_fb_id = prop; prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, "CRTC_ID", DRM_MODE_OBJECT_CRTC); if (!prop) return -ENOMEM; dev->mode_config.prop_crtc_id = prop; prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, "ACTIVE"); if (!prop) return -ENOMEM; dev->mode_config.prop_active = prop; prop = drm_property_create(dev, DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, "MODE_ID", 0); if (!prop) return -ENOMEM; dev->mode_config.prop_mode_id = prop; prop = drm_property_create(dev, DRM_MODE_PROP_BLOB, "DEGAMMA_LUT", 0); if (!prop) return -ENOMEM; dev->mode_config.degamma_lut_property = prop; prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "DEGAMMA_LUT_SIZE", 0, UINT_MAX); if (!prop) return -ENOMEM; dev->mode_config.degamma_lut_size_property = prop; prop = drm_property_create(dev, DRM_MODE_PROP_BLOB, "CTM", 0); if (!prop) return -ENOMEM; dev->mode_config.ctm_property = prop; prop = drm_property_create(dev, DRM_MODE_PROP_BLOB, "GAMMA_LUT", 0); if (!prop) return -ENOMEM; dev->mode_config.gamma_lut_property = prop; prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "GAMMA_LUT_SIZE", 0, UINT_MAX); if (!prop) return -ENOMEM; dev->mode_config.gamma_lut_size_property = prop; return 0; } /** * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties * @dev: DRM device * * Called by a driver the first time a DVI-I connector is made. */ int drm_mode_create_dvi_i_properties(struct drm_device *dev) { struct drm_property *dvi_i_selector; struct drm_property *dvi_i_subconnector; if (dev->mode_config.dvi_i_select_subconnector_property) return 0; dvi_i_selector = drm_property_create_enum(dev, 0, "select subconnector", drm_dvi_i_select_enum_list, ARRAY_SIZE(drm_dvi_i_select_enum_list)); dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, "subconnector", drm_dvi_i_subconnector_enum_list, ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; return 0; } EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); /** * drm_create_tv_properties - create TV specific connector properties * @dev: DRM device * @num_modes: number of different TV formats (modes) supported * @modes: array of pointers to strings containing name of each format * * Called by a driver's TV initialization routine, this function creates * the TV specific connector properties for a given device. Caller is * responsible for allocating a list of format names and passing them to * this routine. */ int drm_mode_create_tv_properties(struct drm_device *dev, unsigned int num_modes, const char * const modes[]) { struct drm_property *tv_selector; struct drm_property *tv_subconnector; unsigned int i; if (dev->mode_config.tv_select_subconnector_property) return 0; /* * Basic connector properties */ tv_selector = drm_property_create_enum(dev, 0, "select subconnector", drm_tv_select_enum_list, ARRAY_SIZE(drm_tv_select_enum_list)); if (!tv_selector) goto nomem; dev->mode_config.tv_select_subconnector_property = tv_selector; tv_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, "subconnector", drm_tv_subconnector_enum_list, ARRAY_SIZE(drm_tv_subconnector_enum_list)); if (!tv_subconnector) goto nomem; dev->mode_config.tv_subconnector_property = tv_subconnector; /* * Other, TV specific properties: margins & TV modes. */ dev->mode_config.tv_left_margin_property = drm_property_create_range(dev, 0, "left margin", 0, 100); if (!dev->mode_config.tv_left_margin_property) goto nomem; dev->mode_config.tv_right_margin_property = drm_property_create_range(dev, 0, "right margin", 0, 100); if (!dev->mode_config.tv_right_margin_property) goto nomem; dev->mode_config.tv_top_margin_property = drm_property_create_range(dev, 0, "top margin", 0, 100); if (!dev->mode_config.tv_top_margin_property) goto nomem; dev->mode_config.tv_bottom_margin_property = drm_property_create_range(dev, 0, "bottom margin", 0, 100); if (!dev->mode_config.tv_bottom_margin_property) goto nomem; dev->mode_config.tv_mode_property = drm_property_create(dev, DRM_MODE_PROP_ENUM, "mode", num_modes); if (!dev->mode_config.tv_mode_property) goto nomem; for (i = 0; i < num_modes; i++) drm_property_add_enum(dev->mode_config.tv_mode_property, i, i, modes[i]); dev->mode_config.tv_brightness_property = drm_property_create_range(dev, 0, "brightness", 0, 100); if (!dev->mode_config.tv_brightness_property) goto nomem; dev->mode_config.tv_contrast_property = drm_property_create_range(dev, 0, "contrast", 0, 100); if (!dev->mode_config.tv_contrast_property) goto nomem; dev->mode_config.tv_flicker_reduction_property = drm_property_create_range(dev, 0, "flicker reduction", 0, 100); if (!dev->mode_config.tv_flicker_reduction_property) goto nomem; dev->mode_config.tv_overscan_property = drm_property_create_range(dev, 0, "overscan", 0, 100); if (!dev->mode_config.tv_overscan_property) goto nomem; dev->mode_config.tv_saturation_property = drm_property_create_range(dev, 0, "saturation", 0, 100); if (!dev->mode_config.tv_saturation_property) goto nomem; dev->mode_config.tv_hue_property = drm_property_create_range(dev, 0, "hue", 0, 100); if (!dev->mode_config.tv_hue_property) goto nomem; return 0; nomem: return -ENOMEM; } EXPORT_SYMBOL(drm_mode_create_tv_properties); /** * drm_mode_create_scaling_mode_property - create scaling mode property * @dev: DRM device * * Called by a driver the first time it's needed, must be attached to desired * connectors. */ int drm_mode_create_scaling_mode_property(struct drm_device *dev) { struct drm_property *scaling_mode; if (dev->mode_config.scaling_mode_property) return 0; scaling_mode = drm_property_create_enum(dev, 0, "scaling mode", drm_scaling_mode_enum_list, ARRAY_SIZE(drm_scaling_mode_enum_list)); dev->mode_config.scaling_mode_property = scaling_mode; return 0; } EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); /** * drm_mode_create_aspect_ratio_property - create aspect ratio property * @dev: DRM device * * Called by a driver the first time it's needed, must be attached to desired * connectors. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_create_aspect_ratio_property(struct drm_device *dev) { if (dev->mode_config.aspect_ratio_property) return 0; dev->mode_config.aspect_ratio_property = drm_property_create_enum(dev, 0, "aspect ratio", drm_aspect_ratio_enum_list, ARRAY_SIZE(drm_aspect_ratio_enum_list)); if (dev->mode_config.aspect_ratio_property == NULL) return -ENOMEM; return 0; } EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); /** * drm_mode_create_dirty_property - create dirty property * @dev: DRM device * * Called by a driver the first time it's needed, must be attached to desired * connectors. */ int drm_mode_create_dirty_info_property(struct drm_device *dev) { struct drm_property *dirty_info; if (dev->mode_config.dirty_info_property) return 0; dirty_info = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, "dirty", drm_dirty_info_enum_list, ARRAY_SIZE(drm_dirty_info_enum_list)); dev->mode_config.dirty_info_property = dirty_info; return 0; } EXPORT_SYMBOL(drm_mode_create_dirty_info_property); /** * drm_mode_create_suggested_offset_properties - create suggests offset properties * @dev: DRM device * * Create the the suggested x/y offset property for connectors. */ int drm_mode_create_suggested_offset_properties(struct drm_device *dev) { if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) return 0; dev->mode_config.suggested_x_property = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); dev->mode_config.suggested_y_property = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); if (dev->mode_config.suggested_x_property == NULL || dev->mode_config.suggested_y_property == NULL) return -ENOMEM; return 0; } EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); /** * drm_mode_getresources - get graphics configuration * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Construct a set of configuration description structures and return * them to the user, including CRTC, connector and framebuffer configuration. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_getresources(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_card_res *card_res = data; struct list_head *lh; struct drm_framebuffer *fb; struct drm_connector *connector; struct drm_crtc *crtc; struct drm_encoder *encoder; int ret = 0; int connector_count = 0; int crtc_count = 0; int fb_count = 0; int encoder_count = 0; int copied = 0; uint32_t __user *fb_id; uint32_t __user *crtc_id; uint32_t __user *connector_id; uint32_t __user *encoder_id; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; mutex_lock(&file_priv->fbs_lock); /* * For the non-control nodes we need to limit the list of resources * by IDs in the group list for this node */ list_for_each(lh, &file_priv->fbs) fb_count++; /* handle this in 4 parts */ /* FBs */ if (card_res->count_fbs >= fb_count) { copied = 0; fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; list_for_each_entry(fb, &file_priv->fbs, filp_head) { if (put_user(fb->base.id, fb_id + copied)) { mutex_unlock(&file_priv->fbs_lock); return -EFAULT; } copied++; } } card_res->count_fbs = fb_count; mutex_unlock(&file_priv->fbs_lock); /* mode_config.mutex protects the connector list against e.g. DP MST * connector hot-adding. CRTC/Plane lists are invariant. */ mutex_lock(&dev->mode_config.mutex); drm_for_each_crtc(crtc, dev) crtc_count++; drm_for_each_connector(connector, dev) connector_count++; drm_for_each_encoder(encoder, dev) encoder_count++; card_res->max_height = dev->mode_config.max_height; card_res->min_height = dev->mode_config.min_height; card_res->max_width = dev->mode_config.max_width; card_res->min_width = dev->mode_config.min_width; /* CRTCs */ if (card_res->count_crtcs >= crtc_count) { copied = 0; crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; drm_for_each_crtc(crtc, dev) { if (put_user(crtc->base.id, crtc_id + copied)) { ret = -EFAULT; goto out; } copied++; } } card_res->count_crtcs = crtc_count; /* Encoders */ if (card_res->count_encoders >= encoder_count) { copied = 0; encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; drm_for_each_encoder(encoder, dev) { if (put_user(encoder->base.id, encoder_id + copied)) { ret = -EFAULT; goto out; } copied++; } } card_res->count_encoders = encoder_count; /* Connectors */ if (card_res->count_connectors >= connector_count) { copied = 0; connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; drm_for_each_connector(connector, dev) { if (put_user(connector->base.id, connector_id + copied)) { ret = -EFAULT; goto out; } copied++; } } card_res->count_connectors = connector_count; out: mutex_unlock(&dev->mode_config.mutex); return ret; } /** * drm_mode_getcrtc - get CRTC configuration * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Construct a CRTC configuration structure to return to the user. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_getcrtc(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_crtc *crtc_resp = data; struct drm_crtc *crtc; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; crtc = drm_crtc_find(dev, crtc_resp->crtc_id); if (!crtc) return -ENOENT; drm_modeset_lock_crtc(crtc, crtc->primary); crtc_resp->gamma_size = crtc->gamma_size; if (crtc->primary->fb) crtc_resp->fb_id = crtc->primary->fb->base.id; else crtc_resp->fb_id = 0; if (crtc->state) { crtc_resp->x = crtc->primary->state->src_x >> 16; crtc_resp->y = crtc->primary->state->src_y >> 16; if (crtc->state->enable) { drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); crtc_resp->mode_valid = 1; } else { crtc_resp->mode_valid = 0; } } else { crtc_resp->x = crtc->x; crtc_resp->y = crtc->y; if (crtc->enabled) { drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); crtc_resp->mode_valid = 1; } else { crtc_resp->mode_valid = 0; } } drm_modeset_unlock_crtc(crtc); return 0; } static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, const struct drm_file *file_priv) { /* * If user-space hasn't configured the driver to expose the stereo 3D * modes, don't expose them. */ if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) return false; return true; } static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) { /* For atomic drivers only state objects are synchronously updated and * protected by modeset locks, so check those first. */ if (connector->state) return connector->state->best_encoder; return connector->encoder; } /* helper for getconnector and getproperties ioctls */ static int get_properties(struct drm_mode_object *obj, bool atomic, uint32_t __user *prop_ptr, uint64_t __user *prop_values, uint32_t *arg_count_props) { int props_count; int i, ret, copied; props_count = obj->properties->count; if (!atomic) props_count -= obj->properties->atomic_count; if ((*arg_count_props >= props_count) && props_count) { for (i = 0, copied = 0; copied < props_count; i++) { struct drm_property *prop = obj->properties->properties[i]; uint64_t val; if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) continue; ret = drm_object_property_get_value(obj, prop, &val); if (ret) return ret; if (put_user(prop->base.id, prop_ptr + copied)) return -EFAULT; if (put_user(val, prop_values + copied)) return -EFAULT; copied++; } } *arg_count_props = props_count; return 0; } /** * drm_mode_getconnector - get connector configuration * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Construct a connector configuration structure to return to the user. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_getconnector(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_get_connector *out_resp = data; struct drm_connector *connector; struct drm_encoder *encoder; struct drm_display_mode *mode; int mode_count = 0; int encoders_count = 0; int ret = 0; int copied = 0; int i; struct drm_mode_modeinfo u_mode; struct drm_mode_modeinfo __user *mode_ptr; uint32_t __user *encoder_ptr; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); mutex_lock(&dev->mode_config.mutex); connector = drm_connector_lookup(dev, out_resp->connector_id); if (!connector) { ret = -ENOENT; goto out_unlock; } for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) if (connector->encoder_ids[i] != 0) encoders_count++; if (out_resp->count_modes == 0) { connector->funcs->fill_modes(connector, dev->mode_config.max_width, dev->mode_config.max_height); } /* delayed so we get modes regardless of pre-fill_modes state */ list_for_each_entry(mode, &connector->modes, head) if (drm_mode_expose_to_userspace(mode, file_priv)) mode_count++; out_resp->connector_id = connector->base.id; out_resp->connector_type = connector->connector_type; out_resp->connector_type_id = connector->connector_type_id; out_resp->mm_width = connector->display_info.width_mm; out_resp->mm_height = connector->display_info.height_mm; out_resp->subpixel = connector->display_info.subpixel_order; out_resp->connection = connector->status; drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); encoder = drm_connector_get_encoder(connector); if (encoder) out_resp->encoder_id = encoder->base.id; else out_resp->encoder_id = 0; /* * This ioctl is called twice, once to determine how much space is * needed, and the 2nd time to fill it. */ if ((out_resp->count_modes >= mode_count) && mode_count) { copied = 0; mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; list_for_each_entry(mode, &connector->modes, head) { if (!drm_mode_expose_to_userspace(mode, file_priv)) continue; drm_mode_convert_to_umode(&u_mode, mode); if (copy_to_user(mode_ptr + copied, &u_mode, sizeof(u_mode))) { ret = -EFAULT; goto out; } copied++; } } out_resp->count_modes = mode_count; ret = get_properties(&connector->base, file_priv->atomic, (uint32_t __user *)(unsigned long)(out_resp->props_ptr), (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), &out_resp->count_props); if (ret) goto out; if ((out_resp->count_encoders >= encoders_count) && encoders_count) { copied = 0; encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { if (connector->encoder_ids[i] != 0) { if (put_user(connector->encoder_ids[i], encoder_ptr + copied)) { ret = -EFAULT; goto out; } copied++; } } } out_resp->count_encoders = encoders_count; out: drm_modeset_unlock(&dev->mode_config.connection_mutex); drm_connector_unreference(connector); out_unlock: mutex_unlock(&dev->mode_config.mutex); return ret; } static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) { struct drm_connector *connector; struct drm_device *dev = encoder->dev; bool uses_atomic = false; /* For atomic drivers only state objects are synchronously updated and * protected by modeset locks, so check those first. */ drm_for_each_connector(connector, dev) { if (!connector->state) continue; uses_atomic = true; if (connector->state->best_encoder != encoder) continue; return connector->state->crtc; } /* Don't return stale data (e.g. pending async disable). */ if (uses_atomic) return NULL; return encoder->crtc; } /** * drm_mode_getencoder - get encoder configuration * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Construct a encoder configuration structure to return to the user. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_getencoder(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_get_encoder *enc_resp = data; struct drm_encoder *encoder; struct drm_crtc *crtc; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; encoder = drm_encoder_find(dev, enc_resp->encoder_id); if (!encoder) return -ENOENT; drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); crtc = drm_encoder_get_crtc(encoder); if (crtc) enc_resp->crtc_id = crtc->base.id; else enc_resp->crtc_id = 0; drm_modeset_unlock(&dev->mode_config.connection_mutex); enc_resp->encoder_type = encoder->encoder_type; enc_resp->encoder_id = encoder->base.id; enc_resp->possible_crtcs = encoder->possible_crtcs; enc_resp->possible_clones = encoder->possible_clones; return 0; } /** * drm_mode_getplane_res - enumerate all plane resources * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * Construct a list of plane ids to return to the user. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_getplane_res(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_get_plane_res *plane_resp = data; struct drm_mode_config *config; struct drm_plane *plane; uint32_t __user *plane_ptr; int copied = 0; unsigned num_planes; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; config = &dev->mode_config; if (file_priv->universal_planes) num_planes = config->num_total_plane; else num_planes = config->num_overlay_plane; /* * This ioctl is called twice, once to determine how much space is * needed, and the 2nd time to fill it. */ if (num_planes && (plane_resp->count_planes >= num_planes)) { plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; /* Plane lists are invariant, no locking needed. */ drm_for_each_plane(plane, dev) { /* * Unless userspace set the 'universal planes' * capability bit, only advertise overlays. */ if (plane->type != DRM_PLANE_TYPE_OVERLAY && !file_priv->universal_planes) continue; if (put_user(plane->base.id, plane_ptr + copied)) return -EFAULT; copied++; } } plane_resp->count_planes = num_planes; return 0; } /** * drm_mode_getplane - get plane configuration * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * Construct a plane configuration structure to return to the user. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_getplane(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_get_plane *plane_resp = data; struct drm_plane *plane; uint32_t __user *format_ptr; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; plane = drm_plane_find(dev, plane_resp->plane_id); if (!plane) return -ENOENT; drm_modeset_lock(&plane->mutex, NULL); if (plane->crtc) plane_resp->crtc_id = plane->crtc->base.id; else plane_resp->crtc_id = 0; if (plane->fb) plane_resp->fb_id = plane->fb->base.id; else plane_resp->fb_id = 0; drm_modeset_unlock(&plane->mutex); plane_resp->plane_id = plane->base.id; plane_resp->possible_crtcs = plane->possible_crtcs; plane_resp->gamma_size = 0; /* * This ioctl is called twice, once to determine how much space is * needed, and the 2nd time to fill it. */ if (plane->format_count && (plane_resp->count_format_types >= plane->format_count)) { format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; if (copy_to_user(format_ptr, plane->format_types, sizeof(uint32_t) * plane->format_count)) { return -EFAULT; } } plane_resp->count_format_types = plane->format_count; return 0; } /** * drm_plane_check_pixel_format - Check if the plane supports the pixel format * @plane: plane to check for format support * @format: the pixel format * * Returns: * Zero of @plane has @format in its list of supported pixel formats, -EINVAL * otherwise. */ int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) { unsigned int i; for (i = 0; i < plane->format_count; i++) { if (format == plane->format_types[i]) return 0; } return -EINVAL; } static int check_src_coords(uint32_t src_x, uint32_t src_y, uint32_t src_w, uint32_t src_h, const struct drm_framebuffer *fb) { unsigned int fb_width, fb_height; fb_width = fb->width << 16; fb_height = fb->height << 16; /* Make sure source coordinates are inside the fb. */ if (src_w > fb_width || src_x > fb_width - src_w || src_h > fb_height || src_y > fb_height - src_h) { DRM_DEBUG_KMS("Invalid source coordinates " "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); return -ENOSPC; } return 0; } /* * setplane_internal - setplane handler for internal callers * * Note that we assume an extra reference has already been taken on fb. If the * update fails, this reference will be dropped before return; if it succeeds, * the previous framebuffer (if any) will be unreferenced instead. * * src_{x,y,w,h} are provided in 16.16 fixed point format */ static int __setplane_internal(struct drm_plane *plane, struct drm_crtc *crtc, struct drm_framebuffer *fb, int32_t crtc_x, int32_t crtc_y, uint32_t crtc_w, uint32_t crtc_h, /* src_{x,y,w,h} values are 16.16 fixed point */ uint32_t src_x, uint32_t src_y, uint32_t src_w, uint32_t src_h) { int ret = 0; /* No fb means shut it down */ if (!fb) { plane->old_fb = plane->fb; ret = plane->funcs->disable_plane(plane); if (!ret) { plane->crtc = NULL; plane->fb = NULL; } else { plane->old_fb = NULL; } goto out; } /* Check whether this plane is usable on this CRTC */ if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { DRM_DEBUG_KMS("Invalid crtc for plane\n"); ret = -EINVAL; goto out; } /* Check whether this plane supports the fb pixel format. */ ret = drm_plane_check_pixel_format(plane, fb->pixel_format); if (ret) { const char *format_name = drm_get_format_name(fb->pixel_format); DRM_DEBUG_KMS("Invalid pixel format %s\n", format_name); kfree(format_name); goto out; } /* Give drivers some help against integer overflows */ if (crtc_w > INT_MAX || crtc_x > INT_MAX - (int32_t) crtc_w || crtc_h > INT_MAX || crtc_y > INT_MAX - (int32_t) crtc_h) { DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", crtc_w, crtc_h, crtc_x, crtc_y); ret = -ERANGE; goto out; } ret = check_src_coords(src_x, src_y, src_w, src_h, fb); if (ret) goto out; plane->old_fb = plane->fb; ret = plane->funcs->update_plane(plane, crtc, fb, crtc_x, crtc_y, crtc_w, crtc_h, src_x, src_y, src_w, src_h); if (!ret) { plane->crtc = crtc; plane->fb = fb; fb = NULL; } else { plane->old_fb = NULL; } out: if (fb) drm_framebuffer_unreference(fb); if (plane->old_fb) drm_framebuffer_unreference(plane->old_fb); plane->old_fb = NULL; return ret; } static int setplane_internal(struct drm_plane *plane, struct drm_crtc *crtc, struct drm_framebuffer *fb, int32_t crtc_x, int32_t crtc_y, uint32_t crtc_w, uint32_t crtc_h, /* src_{x,y,w,h} values are 16.16 fixed point */ uint32_t src_x, uint32_t src_y, uint32_t src_w, uint32_t src_h) { int ret; drm_modeset_lock_all(plane->dev); ret = __setplane_internal(plane, crtc, fb, crtc_x, crtc_y, crtc_w, crtc_h, src_x, src_y, src_w, src_h); drm_modeset_unlock_all(plane->dev); return ret; } /** * drm_mode_setplane - configure a plane's configuration * @dev: DRM device * @data: ioctl data* * @file_priv: DRM file info * * Set plane configuration, including placement, fb, scaling, and other factors. * Or pass a NULL fb to disable (planes may be disabled without providing a * valid crtc). * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_setplane(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_set_plane *plane_req = data; struct drm_plane *plane; struct drm_crtc *crtc = NULL; struct drm_framebuffer *fb = NULL; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; /* * First, find the plane, crtc, and fb objects. If not available, * we don't bother to call the driver. */ plane = drm_plane_find(dev, plane_req->plane_id); if (!plane) { DRM_DEBUG_KMS("Unknown plane ID %d\n", plane_req->plane_id); return -ENOENT; } if (plane_req->fb_id) { fb = drm_framebuffer_lookup(dev, plane_req->fb_id); if (!fb) { DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", plane_req->fb_id); return -ENOENT; } crtc = drm_crtc_find(dev, plane_req->crtc_id); if (!crtc) { DRM_DEBUG_KMS("Unknown crtc ID %d\n", plane_req->crtc_id); return -ENOENT; } } /* * setplane_internal will take care of deref'ing either the old or new * framebuffer depending on success. */ return setplane_internal(plane, crtc, fb, plane_req->crtc_x, plane_req->crtc_y, plane_req->crtc_w, plane_req->crtc_h, plane_req->src_x, plane_req->src_y, plane_req->src_w, plane_req->src_h); } /** * drm_mode_set_config_internal - helper to call ->set_config * @set: modeset config to set * * This is a little helper to wrap internal calls to the ->set_config driver * interface. The only thing it adds is correct refcounting dance. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_set_config_internal(struct drm_mode_set *set) { struct drm_crtc *crtc = set->crtc; struct drm_framebuffer *fb; struct drm_crtc *tmp; int ret; /* * NOTE: ->set_config can also disable other crtcs (if we steal all * connectors from it), hence we need to refcount the fbs across all * crtcs. Atomic modeset will have saner semantics ... */ drm_for_each_crtc(tmp, crtc->dev) tmp->primary->old_fb = tmp->primary->fb; fb = set->fb; ret = crtc->funcs->set_config(set); if (ret == 0) { crtc->primary->crtc = crtc; crtc->primary->fb = fb; } drm_for_each_crtc(tmp, crtc->dev) { if (tmp->primary->fb) drm_framebuffer_reference(tmp->primary->fb); if (tmp->primary->old_fb) drm_framebuffer_unreference(tmp->primary->old_fb); tmp->primary->old_fb = NULL; } return ret; } EXPORT_SYMBOL(drm_mode_set_config_internal); /** * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode * @mode: mode to query * @hdisplay: hdisplay value to fill in * @vdisplay: vdisplay value to fill in * * The vdisplay value will be doubled if the specified mode is a stereo mode of * the appropriate layout. */ void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, int *hdisplay, int *vdisplay) { struct drm_display_mode adjusted; drm_mode_copy(&adjusted, mode); drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); *hdisplay = adjusted.crtc_hdisplay; *vdisplay = adjusted.crtc_vdisplay; } EXPORT_SYMBOL(drm_crtc_get_hv_timing); /** * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the * CRTC viewport * @crtc: CRTC that framebuffer will be displayed on * @x: x panning * @y: y panning * @mode: mode that framebuffer will be displayed under * @fb: framebuffer to check size of */ int drm_crtc_check_viewport(const struct drm_crtc *crtc, int x, int y, const struct drm_display_mode *mode, const struct drm_framebuffer *fb) { int hdisplay, vdisplay; drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); if (crtc->state && crtc->primary->state->rotation & (DRM_ROTATE_90 | DRM_ROTATE_270)) swap(hdisplay, vdisplay); return check_src_coords(x << 16, y << 16, hdisplay << 16, vdisplay << 16, fb); } EXPORT_SYMBOL(drm_crtc_check_viewport); /** * drm_mode_setcrtc - set CRTC configuration * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Build a new CRTC configuration based on user request. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_setcrtc(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_config *config = &dev->mode_config; struct drm_mode_crtc *crtc_req = data; struct drm_crtc *crtc; struct drm_connector **connector_set = NULL, *connector; struct drm_framebuffer *fb = NULL; struct drm_display_mode *mode = NULL; struct drm_mode_set set; uint32_t __user *set_connectors_ptr; int ret; int i; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; /* * Universal plane src offsets are only 16.16, prevent havoc for * drivers using universal plane code internally. */ if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) return -ERANGE; drm_modeset_lock_all(dev); crtc = drm_crtc_find(dev, crtc_req->crtc_id); if (!crtc) { DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); ret = -ENOENT; goto out; } DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); if (crtc_req->mode_valid) { /* If we have a mode we need a framebuffer. */ /* If we pass -1, set the mode with the currently bound fb */ if (crtc_req->fb_id == -1) { if (!crtc->primary->fb) { DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); ret = -EINVAL; goto out; } fb = crtc->primary->fb; /* Make refcounting symmetric with the lookup path. */ drm_framebuffer_reference(fb); } else { fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); if (!fb) { DRM_DEBUG_KMS("Unknown FB ID%d\n", crtc_req->fb_id); ret = -ENOENT; goto out; } } mode = drm_mode_create(dev); if (!mode) { ret = -ENOMEM; goto out; } ret = drm_mode_convert_umode(mode, &crtc_req->mode); if (ret) { DRM_DEBUG_KMS("Invalid mode\n"); goto out; } /* * Check whether the primary plane supports the fb pixel format. * Drivers not implementing the universal planes API use a * default formats list provided by the DRM core which doesn't * match real hardware capabilities. Skip the check in that * case. */ if (!crtc->primary->format_default) { ret = drm_plane_check_pixel_format(crtc->primary, fb->pixel_format); if (ret) { const char *format_name = drm_get_format_name(fb->pixel_format); DRM_DEBUG_KMS("Invalid pixel format %s\n", format_name); kfree(format_name); goto out; } } ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, mode, fb); if (ret) goto out; } if (crtc_req->count_connectors == 0 && mode) { DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); ret = -EINVAL; goto out; } if (crtc_req->count_connectors > 0 && (!mode || !fb)) { DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", crtc_req->count_connectors); ret = -EINVAL; goto out; } if (crtc_req->count_connectors > 0) { u32 out_id; /* Avoid unbounded kernel memory allocation */ if (crtc_req->count_connectors > config->num_connector) { ret = -EINVAL; goto out; } connector_set = kmalloc_array(crtc_req->count_connectors, sizeof(struct drm_connector *), GFP_KERNEL); if (!connector_set) { ret = -ENOMEM; goto out; } for (i = 0; i < crtc_req->count_connectors; i++) { connector_set[i] = NULL; set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; if (get_user(out_id, &set_connectors_ptr[i])) { ret = -EFAULT; goto out; } connector = drm_connector_lookup(dev, out_id); if (!connector) { DRM_DEBUG_KMS("Connector id %d unknown\n", out_id); ret = -ENOENT; goto out; } DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name); connector_set[i] = connector; } } set.crtc = crtc; set.x = crtc_req->x; set.y = crtc_req->y; set.mode = mode; set.connectors = connector_set; set.num_connectors = crtc_req->count_connectors; set.fb = fb; ret = drm_mode_set_config_internal(&set); out: if (fb) drm_framebuffer_unreference(fb); if (connector_set) { for (i = 0; i < crtc_req->count_connectors; i++) { if (connector_set[i]) drm_connector_unreference(connector_set[i]); } } kfree(connector_set); drm_mode_destroy(dev, mode); drm_modeset_unlock_all(dev); return ret; } /** * drm_mode_cursor_universal - translate legacy cursor ioctl call into a * universal plane handler call * @crtc: crtc to update cursor for * @req: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Legacy cursor ioctl's work directly with driver buffer handles. To * translate legacy ioctl calls into universal plane handler calls, we need to * wrap the native buffer handle in a drm_framebuffer. * * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB * buffer with a pitch of 4*width; the universal plane interface should be used * directly in cases where the hardware can support other buffer settings and * userspace wants to make use of these capabilities. * * Returns: * Zero on success, negative errno on failure. */ static int drm_mode_cursor_universal(struct drm_crtc *crtc, struct drm_mode_cursor2 *req, struct drm_file *file_priv) { struct drm_device *dev = crtc->dev; struct drm_framebuffer *fb = NULL; struct drm_mode_fb_cmd2 fbreq = { .width = req->width, .height = req->height, .pixel_format = DRM_FORMAT_ARGB8888, .pitches = { req->width * 4 }, .handles = { req->handle }, }; int32_t crtc_x, crtc_y; uint32_t crtc_w = 0, crtc_h = 0; uint32_t src_w = 0, src_h = 0; int ret = 0; BUG_ON(!crtc->cursor); WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); /* * Obtain fb we'll be using (either new or existing) and take an extra * reference to it if fb != null. setplane will take care of dropping * the reference if the plane update fails. */ if (req->flags & DRM_MODE_CURSOR_BO) { if (req->handle) { fb = internal_framebuffer_create(dev, &fbreq, file_priv); if (IS_ERR(fb)) { DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); return PTR_ERR(fb); } fb->hot_x = req->hot_x; fb->hot_y = req->hot_y; } else { fb = NULL; } } else { fb = crtc->cursor->fb; if (fb) drm_framebuffer_reference(fb); } if (req->flags & DRM_MODE_CURSOR_MOVE) { crtc_x = req->x; crtc_y = req->y; } else { crtc_x = crtc->cursor_x; crtc_y = crtc->cursor_y; } if (fb) { crtc_w = fb->width; crtc_h = fb->height; src_w = fb->width << 16; src_h = fb->height << 16; } /* * setplane_internal will take care of deref'ing either the old or new * framebuffer depending on success. */ ret = __setplane_internal(crtc->cursor, crtc, fb, crtc_x, crtc_y, crtc_w, crtc_h, 0, 0, src_w, src_h); /* Update successful; save new cursor position, if necessary */ if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { crtc->cursor_x = req->x; crtc->cursor_y = req->y; } return ret; } static int drm_mode_cursor_common(struct drm_device *dev, struct drm_mode_cursor2 *req, struct drm_file *file_priv) { struct drm_crtc *crtc; int ret = 0; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) return -EINVAL; crtc = drm_crtc_find(dev, req->crtc_id); if (!crtc) { DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); return -ENOENT; } /* * If this crtc has a universal cursor plane, call that plane's update * handler rather than using legacy cursor handlers. */ drm_modeset_lock_crtc(crtc, crtc->cursor); if (crtc->cursor) { ret = drm_mode_cursor_universal(crtc, req, file_priv); goto out; } if (req->flags & DRM_MODE_CURSOR_BO) { if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { ret = -ENXIO; goto out; } /* Turns off the cursor if handle is 0 */ if (crtc->funcs->cursor_set2) ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, req->width, req->height, req->hot_x, req->hot_y); else ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, req->width, req->height); } if (req->flags & DRM_MODE_CURSOR_MOVE) { if (crtc->funcs->cursor_move) { ret = crtc->funcs->cursor_move(crtc, req->x, req->y); } else { ret = -EFAULT; goto out; } } out: drm_modeset_unlock_crtc(crtc); return ret; } /** * drm_mode_cursor_ioctl - set CRTC's cursor configuration * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Set the cursor configuration based on user request. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_cursor_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_cursor *req = data; struct drm_mode_cursor2 new_req; memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); new_req.hot_x = new_req.hot_y = 0; return drm_mode_cursor_common(dev, &new_req, file_priv); } /** * drm_mode_cursor2_ioctl - set CRTC's cursor configuration * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Set the cursor configuration based on user request. This implements the 2nd * version of the cursor ioctl, which allows userspace to additionally specify * the hotspot of the pointer. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_cursor2_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_cursor2 *req = data; return drm_mode_cursor_common(dev, req, file_priv); } /** * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description * @bpp: bits per pixels * @depth: bit depth per pixel * * Computes a drm fourcc pixel format code for the given @bpp/@depth values. * Useful in fbdev emulation code, since that deals in those values. */ uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) { uint32_t fmt; switch (bpp) { case 8: fmt = DRM_FORMAT_C8; break; case 16: if (depth == 15) fmt = DRM_FORMAT_XRGB1555; else fmt = DRM_FORMAT_RGB565; break; case 24: fmt = DRM_FORMAT_RGB888; break; case 32: if (depth == 24) fmt = DRM_FORMAT_XRGB8888; else if (depth == 30) fmt = DRM_FORMAT_XRGB2101010; else fmt = DRM_FORMAT_ARGB8888; break; default: DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); fmt = DRM_FORMAT_XRGB8888; break; } return fmt; } EXPORT_SYMBOL(drm_mode_legacy_fb_format); /** * drm_mode_addfb - add an FB to the graphics configuration * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Add a new FB to the specified CRTC, given a user request. This is the * original addfb ioctl which only supported RGB formats. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_addfb(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_fb_cmd *or = data; struct drm_mode_fb_cmd2 r = {}; int ret; /* convert to new format and call new ioctl */ r.fb_id = or->fb_id; r.width = or->width; r.height = or->height; r.pitches[0] = or->pitch; r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); r.handles[0] = or->handle; ret = drm_mode_addfb2(dev, &r, file_priv); if (ret) return ret; or->fb_id = r.fb_id; return 0; } static int format_check(const struct drm_mode_fb_cmd2 *r) { uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; const char *format_name; switch (format) { case DRM_FORMAT_C8: case DRM_FORMAT_RGB332: case DRM_FORMAT_BGR233: case DRM_FORMAT_XRGB4444: case DRM_FORMAT_XBGR4444: case DRM_FORMAT_RGBX4444: case DRM_FORMAT_BGRX4444: case DRM_FORMAT_ARGB4444: case DRM_FORMAT_ABGR4444: case DRM_FORMAT_RGBA4444: case DRM_FORMAT_BGRA4444: case DRM_FORMAT_XRGB1555: case DRM_FORMAT_XBGR1555: case DRM_FORMAT_RGBX5551: case DRM_FORMAT_BGRX5551: case DRM_FORMAT_ARGB1555: case DRM_FORMAT_ABGR1555: case DRM_FORMAT_RGBA5551: case DRM_FORMAT_BGRA5551: case DRM_FORMAT_RGB565: case DRM_FORMAT_BGR565: case DRM_FORMAT_RGB888: case DRM_FORMAT_BGR888: case DRM_FORMAT_XRGB8888: case DRM_FORMAT_XBGR8888: case DRM_FORMAT_RGBX8888: case DRM_FORMAT_BGRX8888: case DRM_FORMAT_ARGB8888: case DRM_FORMAT_ABGR8888: case DRM_FORMAT_RGBA8888: case DRM_FORMAT_BGRA8888: case DRM_FORMAT_XRGB2101010: case DRM_FORMAT_XBGR2101010: case DRM_FORMAT_RGBX1010102: case DRM_FORMAT_BGRX1010102: case DRM_FORMAT_ARGB2101010: case DRM_FORMAT_ABGR2101010: case DRM_FORMAT_RGBA1010102: case DRM_FORMAT_BGRA1010102: case DRM_FORMAT_YUYV: case DRM_FORMAT_YVYU: case DRM_FORMAT_UYVY: case DRM_FORMAT_VYUY: case DRM_FORMAT_AYUV: case DRM_FORMAT_NV12: case DRM_FORMAT_NV21: case DRM_FORMAT_NV16: case DRM_FORMAT_NV61: case DRM_FORMAT_NV24: case DRM_FORMAT_NV42: case DRM_FORMAT_YUV410: case DRM_FORMAT_YVU410: case DRM_FORMAT_YUV411: case DRM_FORMAT_YVU411: case DRM_FORMAT_YUV420: case DRM_FORMAT_YVU420: case DRM_FORMAT_YUV422: case DRM_FORMAT_YVU422: case DRM_FORMAT_YUV444: case DRM_FORMAT_YVU444: return 0; default: format_name = drm_get_format_name(r->pixel_format); DRM_DEBUG_KMS("invalid pixel format %s\n", format_name); kfree(format_name); return -EINVAL; } } static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) { int ret, hsub, vsub, num_planes, i; ret = format_check(r); if (ret) { const char *format_name = drm_get_format_name(r->pixel_format); DRM_DEBUG_KMS("bad framebuffer format %s\n", format_name); kfree(format_name); return ret; } hsub = drm_format_horz_chroma_subsampling(r->pixel_format); vsub = drm_format_vert_chroma_subsampling(r->pixel_format); num_planes = drm_format_num_planes(r->pixel_format); if (r->width == 0 || r->width % hsub) { DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); return -EINVAL; } if (r->height == 0 || r->height % vsub) { DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); return -EINVAL; } for (i = 0; i < num_planes; i++) { unsigned int width = r->width / (i != 0 ? hsub : 1); unsigned int height = r->height / (i != 0 ? vsub : 1); unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); if (!r->handles[i]) { DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); return -EINVAL; } if ((uint64_t) width * cpp > UINT_MAX) return -ERANGE; if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) return -ERANGE; if (r->pitches[i] < width * cpp) { DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); return -EINVAL; } if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n", r->modifier[i], i); return -EINVAL; } /* modifier specific checks: */ switch (r->modifier[i]) { case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: /* NOTE: the pitch restriction may be lifted later if it turns * out that no hw has this restriction: */ if (r->pixel_format != DRM_FORMAT_NV12 || width % 128 || height % 32 || r->pitches[i] % 128) { DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); return -EINVAL; } break; default: break; } } for (i = num_planes; i < 4; i++) { if (r->modifier[i]) { DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); return -EINVAL; } /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ if (!(r->flags & DRM_MODE_FB_MODIFIERS)) continue; if (r->handles[i]) { DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); return -EINVAL; } if (r->pitches[i]) { DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); return -EINVAL; } if (r->offsets[i]) { DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); return -EINVAL; } } return 0; } static struct drm_framebuffer * internal_framebuffer_create(struct drm_device *dev, const struct drm_mode_fb_cmd2 *r, struct drm_file *file_priv) { struct drm_mode_config *config = &dev->mode_config; struct drm_framebuffer *fb; int ret; if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); return ERR_PTR(-EINVAL); } if ((config->min_width > r->width) || (r->width > config->max_width)) { DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", r->width, config->min_width, config->max_width); return ERR_PTR(-EINVAL); } if ((config->min_height > r->height) || (r->height > config->max_height)) { DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", r->height, config->min_height, config->max_height); return ERR_PTR(-EINVAL); } if (r->flags & DRM_MODE_FB_MODIFIERS && !dev->mode_config.allow_fb_modifiers) { DRM_DEBUG_KMS("driver does not support fb modifiers\n"); return ERR_PTR(-EINVAL); } ret = framebuffer_check(r); if (ret) return ERR_PTR(ret); fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); if (IS_ERR(fb)) { DRM_DEBUG_KMS("could not create framebuffer\n"); return fb; } return fb; } /** * drm_mode_addfb2 - add an FB to the graphics configuration * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Add a new FB to the specified CRTC, given a user request with format. This is * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers * and uses fourcc codes as pixel format specifiers. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_addfb2(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_fb_cmd2 *r = data; struct drm_framebuffer *fb; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; fb = internal_framebuffer_create(dev, r, file_priv); if (IS_ERR(fb)) return PTR_ERR(fb); DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); r->fb_id = fb->base.id; /* Transfer ownership to the filp for reaping on close */ mutex_lock(&file_priv->fbs_lock); list_add(&fb->filp_head, &file_priv->fbs); mutex_unlock(&file_priv->fbs_lock); return 0; } struct drm_mode_rmfb_work { struct work_struct work; struct list_head fbs; }; static void drm_mode_rmfb_work_fn(struct work_struct *w) { struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work); while (!list_empty(&arg->fbs)) { struct drm_framebuffer *fb = list_first_entry(&arg->fbs, typeof(*fb), filp_head); list_del_init(&fb->filp_head); drm_framebuffer_remove(fb); } } /** * drm_mode_rmfb - remove an FB from the configuration * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Remove the FB specified by the user. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_rmfb(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_framebuffer *fb = NULL; struct drm_framebuffer *fbl = NULL; uint32_t *id = data; int found = 0; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; fb = drm_framebuffer_lookup(dev, *id); if (!fb) return -ENOENT; mutex_lock(&file_priv->fbs_lock); list_for_each_entry(fbl, &file_priv->fbs, filp_head) if (fb == fbl) found = 1; if (!found) { mutex_unlock(&file_priv->fbs_lock); goto fail_unref; } list_del_init(&fb->filp_head); mutex_unlock(&file_priv->fbs_lock); /* drop the reference we picked up in framebuffer lookup */ drm_framebuffer_unreference(fb); /* * we now own the reference that was stored in the fbs list * * drm_framebuffer_remove may fail with -EINTR on pending signals, * so run this in a separate stack as there's no way to correctly * handle this after the fb is already removed from the lookup table. */ if (drm_framebuffer_read_refcount(fb) > 1) { struct drm_mode_rmfb_work arg; INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); INIT_LIST_HEAD(&arg.fbs); list_add_tail(&fb->filp_head, &arg.fbs); schedule_work(&arg.work); flush_work(&arg.work); destroy_work_on_stack(&arg.work); } else drm_framebuffer_unreference(fb); return 0; fail_unref: drm_framebuffer_unreference(fb); return -ENOENT; } /** * drm_mode_getfb - get FB info * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Lookup the FB given its ID and return info about it. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_getfb(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_fb_cmd *r = data; struct drm_framebuffer *fb; int ret; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; fb = drm_framebuffer_lookup(dev, r->fb_id); if (!fb) return -ENOENT; r->height = fb->height; r->width = fb->width; r->depth = fb->depth; r->bpp = fb->bits_per_pixel; r->pitch = fb->pitches[0]; if (fb->funcs->create_handle) { if (drm_is_current_master(file_priv) || capable(CAP_SYS_ADMIN) || drm_is_control_client(file_priv)) { ret = fb->funcs->create_handle(fb, file_priv, &r->handle); } else { /* GET_FB() is an unprivileged ioctl so we must not * return a buffer-handle to non-master processes! For * backwards-compatibility reasons, we cannot make * GET_FB() privileged, so just return an invalid handle * for non-masters. */ r->handle = 0; ret = 0; } } else { ret = -ENODEV; } drm_framebuffer_unreference(fb); return ret; } /** * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB * @dev: drm device for the ioctl * @data: data pointer for the ioctl * @file_priv: drm file for the ioctl call * * Lookup the FB and flush out the damaged area supplied by userspace as a clip * rectangle list. Generic userspace which does frontbuffer rendering must call * this ioctl to flush out the changes on manual-update display outputs, e.g. * usb display-link, mipi manual update panels or edp panel self refresh modes. * * Modesetting drivers which always update the frontbuffer do not need to * implement the corresponding ->dirty framebuffer callback. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_dirtyfb_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_clip_rect __user *clips_ptr; struct drm_clip_rect *clips = NULL; struct drm_mode_fb_dirty_cmd *r = data; struct drm_framebuffer *fb; unsigned flags; int num_clips; int ret; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; fb = drm_framebuffer_lookup(dev, r->fb_id); if (!fb) return -ENOENT; num_clips = r->num_clips; clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; if (!num_clips != !clips_ptr) { ret = -EINVAL; goto out_err1; } flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; /* If userspace annotates copy, clips must come in pairs */ if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { ret = -EINVAL; goto out_err1; } if (num_clips && clips_ptr) { if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { ret = -EINVAL; goto out_err1; } clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); if (!clips) { ret = -ENOMEM; goto out_err1; } ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips)); if (ret) { ret = -EFAULT; goto out_err2; } } if (fb->funcs->dirty) { ret = fb->funcs->dirty(fb, file_priv, flags, r->color, clips, num_clips); } else { ret = -ENOSYS; } out_err2: kfree(clips); out_err1: drm_framebuffer_unreference(fb); return ret; } /** * drm_fb_release - remove and free the FBs on this file * @priv: drm file for the ioctl * * Destroy all the FBs associated with @filp. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ void drm_fb_release(struct drm_file *priv) { struct drm_framebuffer *fb, *tfb; struct drm_mode_rmfb_work arg; INIT_LIST_HEAD(&arg.fbs); /* * When the file gets released that means no one else can access the fb * list any more, so no need to grab fpriv->fbs_lock. And we need to * avoid upsetting lockdep since the universal cursor code adds a * framebuffer while holding mutex locks. * * Note that a real deadlock between fpriv->fbs_lock and the modeset * locks is impossible here since no one else but this function can get * at it any more. */ list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { if (drm_framebuffer_read_refcount(fb) > 1) { list_move_tail(&fb->filp_head, &arg.fbs); } else { list_del_init(&fb->filp_head); /* This drops the fpriv->fbs reference. */ drm_framebuffer_unreference(fb); } } if (!list_empty(&arg.fbs)) { INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); schedule_work(&arg.work); flush_work(&arg.work); destroy_work_on_stack(&arg.work); } } static bool drm_property_type_valid(struct drm_property *property) { if (property->flags & DRM_MODE_PROP_EXTENDED_TYPE) return !(property->flags & DRM_MODE_PROP_LEGACY_TYPE); return !!(property->flags & DRM_MODE_PROP_LEGACY_TYPE); } /** * drm_property_create - create a new property type * @dev: drm device * @flags: flags specifying the property type * @name: name of the property * @num_values: number of pre-defined values * * This creates a new generic drm property which can then be attached to a drm * object with drm_object_attach_property. The returned property object must be * freed with drm_property_destroy. * * Note that the DRM core keeps a per-device list of properties and that, if * drm_mode_config_cleanup() is called, it will destroy all properties created * by the driver. * * Returns: * A pointer to the newly created property on success, NULL on failure. */ struct drm_property *drm_property_create(struct drm_device *dev, int flags, const char *name, int num_values) { struct drm_property *property = NULL; int ret; property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); if (!property) return NULL; property->dev = dev; if (num_values) { property->values = kcalloc(num_values, sizeof(uint64_t), GFP_KERNEL); if (!property->values) goto fail; } ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); if (ret) goto fail; property->flags = flags; property->num_values = num_values; INIT_LIST_HEAD(&property->enum_list); if (name) { strncpy(property->name, name, DRM_PROP_NAME_LEN); property->name[DRM_PROP_NAME_LEN-1] = '\0'; } list_add_tail(&property->head, &dev->mode_config.property_list); WARN_ON(!drm_property_type_valid(property)); return property; fail: kfree(property->values); kfree(property); return NULL; } EXPORT_SYMBOL(drm_property_create); /** * drm_property_create_enum - create a new enumeration property type * @dev: drm device * @flags: flags specifying the property type * @name: name of the property * @props: enumeration lists with property values * @num_values: number of pre-defined values * * This creates a new generic drm property which can then be attached to a drm * object with drm_object_attach_property. The returned property object must be * freed with drm_property_destroy. * * Userspace is only allowed to set one of the predefined values for enumeration * properties. * * Returns: * A pointer to the newly created property on success, NULL on failure. */ struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, const char *name, const struct drm_prop_enum_list *props, int num_values) { struct drm_property *property; int i, ret; flags |= DRM_MODE_PROP_ENUM; property = drm_property_create(dev, flags, name, num_values); if (!property) return NULL; for (i = 0; i < num_values; i++) { ret = drm_property_add_enum(property, i, props[i].type, props[i].name); if (ret) { drm_property_destroy(dev, property); return NULL; } } return property; } EXPORT_SYMBOL(drm_property_create_enum); /** * drm_property_create_bitmask - create a new bitmask property type * @dev: drm device * @flags: flags specifying the property type * @name: name of the property * @props: enumeration lists with property bitflags * @num_props: size of the @props array * @supported_bits: bitmask of all supported enumeration values * * This creates a new bitmask drm property which can then be attached to a drm * object with drm_object_attach_property. The returned property object must be * freed with drm_property_destroy. * * Compared to plain enumeration properties userspace is allowed to set any * or'ed together combination of the predefined property bitflag values * * Returns: * A pointer to the newly created property on success, NULL on failure. */ struct drm_property *drm_property_create_bitmask(struct drm_device *dev, int flags, const char *name, const struct drm_prop_enum_list *props, int num_props, uint64_t supported_bits) { struct drm_property *property; int i, ret, index = 0; int num_values = hweight64(supported_bits); flags |= DRM_MODE_PROP_BITMASK; property = drm_property_create(dev, flags, name, num_values); if (!property) return NULL; for (i = 0; i < num_props; i++) { if (!(supported_bits & (1ULL << props[i].type))) continue; if (WARN_ON(index >= num_values)) { drm_property_destroy(dev, property); return NULL; } ret = drm_property_add_enum(property, index++, props[i].type, props[i].name); if (ret) { drm_property_destroy(dev, property); return NULL; } } return property; } EXPORT_SYMBOL(drm_property_create_bitmask); static struct drm_property *property_create_range(struct drm_device *dev, int flags, const char *name, uint64_t min, uint64_t max) { struct drm_property *property; property = drm_property_create(dev, flags, name, 2); if (!property) return NULL; property->values[0] = min; property->values[1] = max; return property; } /** * drm_property_create_range - create a new unsigned ranged property type * @dev: drm device * @flags: flags specifying the property type * @name: name of the property * @min: minimum value of the property * @max: maximum value of the property * * This creates a new generic drm property which can then be attached to a drm * object with drm_object_attach_property. The returned property object must be * freed with drm_property_destroy. * * Userspace is allowed to set any unsigned integer value in the (min, max) * range inclusive. * * Returns: * A pointer to the newly created property on success, NULL on failure. */ struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, const char *name, uint64_t min, uint64_t max) { return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, name, min, max); } EXPORT_SYMBOL(drm_property_create_range); /** * drm_property_create_signed_range - create a new signed ranged property type * @dev: drm device * @flags: flags specifying the property type * @name: name of the property * @min: minimum value of the property * @max: maximum value of the property * * This creates a new generic drm property which can then be attached to a drm * object with drm_object_attach_property. The returned property object must be * freed with drm_property_destroy. * * Userspace is allowed to set any signed integer value in the (min, max) * range inclusive. * * Returns: * A pointer to the newly created property on success, NULL on failure. */ struct drm_property *drm_property_create_signed_range(struct drm_device *dev, int flags, const char *name, int64_t min, int64_t max) { return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, name, I642U64(min), I642U64(max)); } EXPORT_SYMBOL(drm_property_create_signed_range); /** * drm_property_create_object - create a new object property type * @dev: drm device * @flags: flags specifying the property type * @name: name of the property * @type: object type from DRM_MODE_OBJECT_* defines * * This creates a new generic drm property which can then be attached to a drm * object with drm_object_attach_property. The returned property object must be * freed with drm_property_destroy. * * Userspace is only allowed to set this to any property value of the given * @type. Only useful for atomic properties, which is enforced. * * Returns: * A pointer to the newly created property on success, NULL on failure. */ struct drm_property *drm_property_create_object(struct drm_device *dev, int flags, const char *name, uint32_t type) { struct drm_property *property; flags |= DRM_MODE_PROP_OBJECT; if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) return NULL; property = drm_property_create(dev, flags, name, 1); if (!property) return NULL; property->values[0] = type; return property; } EXPORT_SYMBOL(drm_property_create_object); /** * drm_property_create_bool - create a new boolean property type * @dev: drm device * @flags: flags specifying the property type * @name: name of the property * * This creates a new generic drm property which can then be attached to a drm * object with drm_object_attach_property. The returned property object must be * freed with drm_property_destroy. * * This is implemented as a ranged property with only {0, 1} as valid values. * * Returns: * A pointer to the newly created property on success, NULL on failure. */ struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, const char *name) { return drm_property_create_range(dev, flags, name, 0, 1); } EXPORT_SYMBOL(drm_property_create_bool); /** * drm_property_add_enum - add a possible value to an enumeration property * @property: enumeration property to change * @index: index of the new enumeration * @value: value of the new enumeration * @name: symbolic name of the new enumeration * * This functions adds enumerations to a property. * * It's use is deprecated, drivers should use one of the more specific helpers * to directly create the property with all enumerations already attached. * * Returns: * Zero on success, error code on failure. */ int drm_property_add_enum(struct drm_property *property, int index, uint64_t value, const char *name) { struct drm_property_enum *prop_enum; if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) return -EINVAL; /* * Bitmask enum properties have the additional constraint of values * from 0 to 63 */ if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && (value > 63)) return -EINVAL; if (!list_empty(&property->enum_list)) { list_for_each_entry(prop_enum, &property->enum_list, head) { if (prop_enum->value == value) { strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; return 0; } } } prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); if (!prop_enum) return -ENOMEM; strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; prop_enum->value = value; property->values[index] = value; list_add_tail(&prop_enum->head, &property->enum_list); return 0; } EXPORT_SYMBOL(drm_property_add_enum); /** * drm_property_destroy - destroy a drm property * @dev: drm device * @property: property to destry * * This function frees a property including any attached resources like * enumeration values. */ void drm_property_destroy(struct drm_device *dev, struct drm_property *property) { struct drm_property_enum *prop_enum, *pt; list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { list_del(&prop_enum->head); kfree(prop_enum); } if (property->num_values) kfree(property->values); drm_mode_object_unregister(dev, &property->base); list_del(&property->head); kfree(property); } EXPORT_SYMBOL(drm_property_destroy); /** * drm_object_attach_property - attach a property to a modeset object * @obj: drm modeset object * @property: property to attach * @init_val: initial value of the property * * This attaches the given property to the modeset object with the given initial * value. Currently this function cannot fail since the properties are stored in * a statically sized array. */ void drm_object_attach_property(struct drm_mode_object *obj, struct drm_property *property, uint64_t init_val) { int count = obj->properties->count; if (count == DRM_OBJECT_MAX_PROPERTY) { WARN(1, "Failed to attach object property (type: 0x%x). Please " "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " "you see this message on the same object type.\n", obj->type); return; } obj->properties->properties[count] = property; obj->properties->values[count] = init_val; obj->properties->count++; if (property->flags & DRM_MODE_PROP_ATOMIC) obj->properties->atomic_count++; } EXPORT_SYMBOL(drm_object_attach_property); /** * drm_object_property_set_value - set the value of a property * @obj: drm mode object to set property value for * @property: property to set * @val: value the property should be set to * * This functions sets a given property on a given object. This function only * changes the software state of the property, it does not call into the * driver's ->set_property callback. * * Returns: * Zero on success, error code on failure. */ int drm_object_property_set_value(struct drm_mode_object *obj, struct drm_property *property, uint64_t val) { int i; for (i = 0; i < obj->properties->count; i++) { if (obj->properties->properties[i] == property) { obj->properties->values[i] = val; return 0; } } return -EINVAL; } EXPORT_SYMBOL(drm_object_property_set_value); /** * drm_object_property_get_value - retrieve the value of a property * @obj: drm mode object to get property value from * @property: property to retrieve * @val: storage for the property value * * This function retrieves the softare state of the given property for the given * property. Since there is no driver callback to retrieve the current property * value this might be out of sync with the hardware, depending upon the driver * and property. * * Returns: * Zero on success, error code on failure. */ int drm_object_property_get_value(struct drm_mode_object *obj, struct drm_property *property, uint64_t *val) { int i; /* read-only properties bypass atomic mechanism and still store * their value in obj->properties->values[].. mostly to avoid * having to deal w/ EDID and similar props in atomic paths: */ if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && !(property->flags & DRM_MODE_PROP_IMMUTABLE)) return drm_atomic_get_property(obj, property, val); for (i = 0; i < obj->properties->count; i++) { if (obj->properties->properties[i] == property) { *val = obj->properties->values[i]; return 0; } } return -EINVAL; } EXPORT_SYMBOL(drm_object_property_get_value); /** * drm_mode_getproperty_ioctl - get the property metadata * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * This function retrieves the metadata for a given property, like the different * possible values for an enum property or the limits for a range property. * * Blob properties are special * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_getproperty_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_get_property *out_resp = data; struct drm_property *property; int enum_count = 0; int value_count = 0; int ret = 0, i; int copied; struct drm_property_enum *prop_enum; struct drm_mode_property_enum __user *enum_ptr; uint64_t __user *values_ptr; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; drm_modeset_lock_all(dev); property = drm_property_find(dev, out_resp->prop_id); if (!property) { ret = -ENOENT; goto done; } if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { list_for_each_entry(prop_enum, &property->enum_list, head) enum_count++; } value_count = property->num_values; strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); out_resp->name[DRM_PROP_NAME_LEN-1] = 0; out_resp->flags = property->flags; if ((out_resp->count_values >= value_count) && value_count) { values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; for (i = 0; i < value_count; i++) { if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { ret = -EFAULT; goto done; } } } out_resp->count_values = value_count; if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { copied = 0; enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; list_for_each_entry(prop_enum, &property->enum_list, head) { if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { ret = -EFAULT; goto done; } if (copy_to_user(&enum_ptr[copied].name, &prop_enum->name, DRM_PROP_NAME_LEN)) { ret = -EFAULT; goto done; } copied++; } } out_resp->count_enum_blobs = enum_count; } /* * NOTE: The idea seems to have been to use this to read all the blob * property values. But nothing ever added them to the corresponding * list, userspace always used the special-purpose get_blob ioctl to * read the value for a blob property. It also doesn't make a lot of * sense to return values here when everything else is just metadata for * the property itself. */ if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) out_resp->count_enum_blobs = 0; done: drm_modeset_unlock_all(dev); return ret; } static void drm_property_free_blob(struct kref *kref) { struct drm_property_blob *blob = container_of(kref, struct drm_property_blob, base.refcount); mutex_lock(&blob->dev->mode_config.blob_lock); list_del(&blob->head_global); mutex_unlock(&blob->dev->mode_config.blob_lock); drm_mode_object_unregister(blob->dev, &blob->base); kfree(blob); } /** * drm_property_create_blob - Create new blob property * * Creates a new blob property for a specified DRM device, optionally * copying data. * * @dev: DRM device to create property for * @length: Length to allocate for blob data * @data: If specified, copies data into blob * * Returns: * New blob property with a single reference on success, or an ERR_PTR * value on failure. */ struct drm_property_blob * drm_property_create_blob(struct drm_device *dev, size_t length, const void *data) { struct drm_property_blob *blob; int ret; if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) return ERR_PTR(-EINVAL); blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); if (!blob) return ERR_PTR(-ENOMEM); /* This must be explicitly initialised, so we can safely call list_del * on it in the removal handler, even if it isn't in a file list. */ INIT_LIST_HEAD(&blob->head_file); blob->length = length; blob->dev = dev; if (data) memcpy(blob->data, data, length); ret = drm_mode_object_get_reg(dev, &blob->base, DRM_MODE_OBJECT_BLOB, true, drm_property_free_blob); if (ret) { kfree(blob); return ERR_PTR(-EINVAL); } mutex_lock(&dev->mode_config.blob_lock); list_add_tail(&blob->head_global, &dev->mode_config.property_blob_list); mutex_unlock(&dev->mode_config.blob_lock); return blob; } EXPORT_SYMBOL(drm_property_create_blob); /** * drm_property_unreference_blob - Unreference a blob property * * Drop a reference on a blob property. May free the object. * * @blob: Pointer to blob property */ void drm_property_unreference_blob(struct drm_property_blob *blob) { if (!blob) return; drm_mode_object_unreference(&blob->base); } EXPORT_SYMBOL(drm_property_unreference_blob); /** * drm_property_destroy_user_blobs - destroy all blobs created by this client * @dev: DRM device * @file_priv: destroy all blobs owned by this file handle */ void drm_property_destroy_user_blobs(struct drm_device *dev, struct drm_file *file_priv) { struct drm_property_blob *blob, *bt; /* * When the file gets released that means no one else can access the * blob list any more, so no need to grab dev->blob_lock. */ list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { list_del_init(&blob->head_file); drm_property_unreference_blob(blob); } } /** * drm_property_reference_blob - Take a reference on an existing property * * Take a new reference on an existing blob property. * * @blob: Pointer to blob property */ struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) { drm_mode_object_reference(&blob->base); return blob; } EXPORT_SYMBOL(drm_property_reference_blob); /** * drm_property_lookup_blob - look up a blob property and take a reference * @dev: drm device * @id: id of the blob property * * If successful, this takes an additional reference to the blob property. * callers need to make sure to eventually unreference the returned property * again, using @drm_property_unreference_blob. */ struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, uint32_t id) { struct drm_mode_object *obj; struct drm_property_blob *blob = NULL; obj = _object_find(dev, id, DRM_MODE_OBJECT_BLOB); if (obj) blob = obj_to_blob(obj); return blob; } EXPORT_SYMBOL(drm_property_lookup_blob); /** * drm_property_replace_global_blob - atomically replace existing blob property * @dev: drm device * @replace: location of blob property pointer to be replaced * @length: length of data for new blob, or 0 for no data * @data: content for new blob, or NULL for no data * @obj_holds_id: optional object for property holding blob ID * @prop_holds_id: optional property holding blob ID * @return 0 on success or error on failure * * This function will atomically replace a global property in the blob list, * optionally updating a property which holds the ID of that property. It is * guaranteed to be atomic: no caller will be allowed to see intermediate * results, and either the entire operation will succeed and clean up the * previous property, or it will fail and the state will be unchanged. * * If length is 0 or data is NULL, no new blob will be created, and the holding * property, if specified, will be set to 0. * * Access to the replace pointer is assumed to be protected by the caller, e.g. * by holding the relevant modesetting object lock for its parent. * * For example, a drm_connector has a 'PATH' property, which contains the ID * of a blob property with the value of the MST path information. Calling this * function with replace pointing to the connector's path_blob_ptr, length and * data set for the new path information, obj_holds_id set to the connector's * base object, and prop_holds_id set to the path property name, will perform * a completely atomic update. The access to path_blob_ptr is protected by the * caller holding a lock on the connector. */ static int drm_property_replace_global_blob(struct drm_device *dev, struct drm_property_blob **replace, size_t length, const void *data, struct drm_mode_object *obj_holds_id, struct drm_property *prop_holds_id) { struct drm_property_blob *new_blob = NULL; struct drm_property_blob *old_blob = NULL; int ret; WARN_ON(replace == NULL); old_blob = *replace; if (length && data) { new_blob = drm_property_create_blob(dev, length, data); if (IS_ERR(new_blob)) return PTR_ERR(new_blob); } /* This does not need to be synchronised with blob_lock, as the * get_properties ioctl locks all modesetting objects, and * obj_holds_id must be locked before calling here, so we cannot * have its value out of sync with the list membership modified * below under blob_lock. */ if (obj_holds_id) { ret = drm_object_property_set_value(obj_holds_id, prop_holds_id, new_blob ? new_blob->base.id : 0); if (ret != 0) goto err_created; } drm_property_unreference_blob(old_blob); *replace = new_blob; return 0; err_created: drm_property_unreference_blob(new_blob); return ret; } /** * drm_mode_getblob_ioctl - get the contents of a blob property value * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * This function retrieves the contents of a blob property. The value stored in * an object's blob property is just a normal modeset object id. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_getblob_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_get_blob *out_resp = data; struct drm_property_blob *blob; int ret = 0; void __user *blob_ptr; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; blob = drm_property_lookup_blob(dev, out_resp->blob_id); if (!blob) return -ENOENT; if (out_resp->length == blob->length) { blob_ptr = (void __user *)(unsigned long)out_resp->data; if (copy_to_user(blob_ptr, blob->data, blob->length)) { ret = -EFAULT; goto unref; } } out_resp->length = blob->length; unref: drm_property_unreference_blob(blob); return ret; } /** * drm_mode_createblob_ioctl - create a new blob property * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * This function creates a new blob property with user-defined values. In order * to give us sensible validation and checking when creating, rather than at * every potential use, we also require a type to be provided upfront. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_createblob_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_create_blob *out_resp = data; struct drm_property_blob *blob; void __user *blob_ptr; int ret = 0; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; blob = drm_property_create_blob(dev, out_resp->length, NULL); if (IS_ERR(blob)) return PTR_ERR(blob); blob_ptr = (void __user *)(unsigned long)out_resp->data; if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { ret = -EFAULT; goto out_blob; } /* Dropping the lock between create_blob and our access here is safe * as only the same file_priv can remove the blob; at this point, it is * not associated with any file_priv. */ mutex_lock(&dev->mode_config.blob_lock); out_resp->blob_id = blob->base.id; list_add_tail(&blob->head_file, &file_priv->blobs); mutex_unlock(&dev->mode_config.blob_lock); return 0; out_blob: drm_property_unreference_blob(blob); return ret; } /** * drm_mode_destroyblob_ioctl - destroy a user blob property * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * Destroy an existing user-defined blob property. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_destroyblob_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_destroy_blob *out_resp = data; struct drm_property_blob *blob = NULL, *bt; bool found = false; int ret = 0; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; blob = drm_property_lookup_blob(dev, out_resp->blob_id); if (!blob) return -ENOENT; mutex_lock(&dev->mode_config.blob_lock); /* Ensure the property was actually created by this user. */ list_for_each_entry(bt, &file_priv->blobs, head_file) { if (bt == blob) { found = true; break; } } if (!found) { ret = -EPERM; goto err; } /* We must drop head_file here, because we may not be the last * reference on the blob. */ list_del_init(&blob->head_file); mutex_unlock(&dev->mode_config.blob_lock); /* One reference from lookup, and one from the filp. */ drm_property_unreference_blob(blob); drm_property_unreference_blob(blob); return 0; err: mutex_unlock(&dev->mode_config.blob_lock); drm_property_unreference_blob(blob); return ret; } /** * drm_mode_connector_set_path_property - set tile property on connector * @connector: connector to set property on. * @path: path to use for property; must not be NULL. * * This creates a property to expose to userspace to specify a * connector path. This is mainly used for DisplayPort MST where * connectors have a topology and we want to allow userspace to give * them more meaningful names. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_connector_set_path_property(struct drm_connector *connector, const char *path) { struct drm_device *dev = connector->dev; int ret; ret = drm_property_replace_global_blob(dev, &connector->path_blob_ptr, strlen(path) + 1, path, &connector->base, dev->mode_config.path_property); return ret; } EXPORT_SYMBOL(drm_mode_connector_set_path_property); /** * drm_mode_connector_set_tile_property - set tile property on connector * @connector: connector to set property on. * * This looks up the tile information for a connector, and creates a * property for userspace to parse if it exists. The property is of * the form of 8 integers using ':' as a separator. * * Returns: * Zero on success, errno on failure. */ int drm_mode_connector_set_tile_property(struct drm_connector *connector) { struct drm_device *dev = connector->dev; char tile[256]; int ret; if (!connector->has_tile) { ret = drm_property_replace_global_blob(dev, &connector->tile_blob_ptr, 0, NULL, &connector->base, dev->mode_config.tile_property); return ret; } snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", connector->tile_group->id, connector->tile_is_single_monitor, connector->num_h_tile, connector->num_v_tile, connector->tile_h_loc, connector->tile_v_loc, connector->tile_h_size, connector->tile_v_size); ret = drm_property_replace_global_blob(dev, &connector->tile_blob_ptr, strlen(tile) + 1, tile, &connector->base, dev->mode_config.tile_property); return ret; } EXPORT_SYMBOL(drm_mode_connector_set_tile_property); /** * drm_mode_connector_update_edid_property - update the edid property of a connector * @connector: drm connector * @edid: new value of the edid property * * This function creates a new blob modeset object and assigns its id to the * connector's edid property. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_connector_update_edid_property(struct drm_connector *connector, const struct edid *edid) { struct drm_device *dev = connector->dev; size_t size = 0; int ret; /* ignore requests to set edid when overridden */ if (connector->override_edid) return 0; if (edid) size = EDID_LENGTH * (1 + edid->extensions); ret = drm_property_replace_global_blob(dev, &connector->edid_blob_ptr, size, edid, &connector->base, dev->mode_config.edid_property); return ret; } EXPORT_SYMBOL(drm_mode_connector_update_edid_property); /* Some properties could refer to dynamic refcnt'd objects, or things that * need special locking to handle lifetime issues (ie. to ensure the prop * value doesn't become invalid part way through the property update due to * race). The value returned by reference via 'obj' should be passed back * to drm_property_change_valid_put() after the property is set (and the * object to which the property is attached has a chance to take it's own * reference). */ bool drm_property_change_valid_get(struct drm_property *property, uint64_t value, struct drm_mode_object **ref) { int i; if (property->flags & DRM_MODE_PROP_IMMUTABLE) return false; *ref = NULL; if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { if (value < property->values[0] || value > property->values[1]) return false; return true; } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { int64_t svalue = U642I64(value); if (svalue < U642I64(property->values[0]) || svalue > U642I64(property->values[1])) return false; return true; } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { uint64_t valid_mask = 0; for (i = 0; i < property->num_values; i++) valid_mask |= (1ULL << property->values[i]); return !(value & ~valid_mask); } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { struct drm_property_blob *blob; if (value == 0) return true; blob = drm_property_lookup_blob(property->dev, value); if (blob) { *ref = &blob->base; return true; } else { return false; } } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { /* a zero value for an object property translates to null: */ if (value == 0) return true; *ref = _object_find(property->dev, value, property->values[0]); return *ref != NULL; } for (i = 0; i < property->num_values; i++) if (property->values[i] == value) return true; return false; } void drm_property_change_valid_put(struct drm_property *property, struct drm_mode_object *ref) { if (!ref) return; if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { drm_mode_object_unreference(ref); } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) drm_property_unreference_blob(obj_to_blob(ref)); } /** * drm_mode_connector_property_set_ioctl - set the current value of a connector property * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * This function sets the current value for a connectors's property. It also * calls into a driver's ->set_property callback to update the hardware state * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_connector_property_set_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_connector_set_property *conn_set_prop = data; struct drm_mode_obj_set_property obj_set_prop = { .value = conn_set_prop->value, .prop_id = conn_set_prop->prop_id, .obj_id = conn_set_prop->connector_id, .obj_type = DRM_MODE_OBJECT_CONNECTOR }; /* It does all the locking and checking we need */ return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); } static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, struct drm_property *property, uint64_t value) { int ret = -EINVAL; struct drm_connector *connector = obj_to_connector(obj); /* Do DPMS ourselves */ if (property == connector->dev->mode_config.dpms_property) { ret = (*connector->funcs->dpms)(connector, (int)value); } else if (connector->funcs->set_property) ret = connector->funcs->set_property(connector, property, value); /* store the property value if successful */ if (!ret) drm_object_property_set_value(&connector->base, property, value); return ret; } static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, struct drm_property *property, uint64_t value) { int ret = -EINVAL; struct drm_crtc *crtc = obj_to_crtc(obj); if (crtc->funcs->set_property) ret = crtc->funcs->set_property(crtc, property, value); if (!ret) drm_object_property_set_value(obj, property, value); return ret; } /** * drm_mode_plane_set_obj_prop - set the value of a property * @plane: drm plane object to set property value for * @property: property to set * @value: value the property should be set to * * This functions sets a given property on a given plane object. This function * calls the driver's ->set_property callback and changes the software state of * the property if the callback succeeds. * * Returns: * Zero on success, error code on failure. */ int drm_mode_plane_set_obj_prop(struct drm_plane *plane, struct drm_property *property, uint64_t value) { int ret = -EINVAL; struct drm_mode_object *obj = &plane->base; if (plane->funcs->set_property) ret = plane->funcs->set_property(plane, property, value); if (!ret) drm_object_property_set_value(obj, property, value); return ret; } EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); /** * drm_mode_obj_get_properties_ioctl - get the current value of a object's property * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * This function retrieves the current value for an object's property. Compared * to the connector specific ioctl this one is extended to also work on crtc and * plane objects. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_obj_get_properties *arg = data; struct drm_mode_object *obj; int ret = 0; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; drm_modeset_lock_all(dev); obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); if (!obj) { ret = -ENOENT; goto out; } if (!obj->properties) { ret = -EINVAL; goto out_unref; } ret = get_properties(obj, file_priv->atomic, (uint32_t __user *)(unsigned long)(arg->props_ptr), (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), &arg->count_props); out_unref: drm_mode_object_unreference(obj); out: drm_modeset_unlock_all(dev); return ret; } /** * drm_mode_obj_set_property_ioctl - set the current value of an object's property * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * This function sets the current value for an object's property. It also calls * into a driver's ->set_property callback to update the hardware state. * Compared to the connector specific ioctl this one is extended to also work on * crtc and plane objects. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_obj_set_property *arg = data; struct drm_mode_object *arg_obj; struct drm_mode_object *prop_obj; struct drm_property *property; int i, ret = -EINVAL; struct drm_mode_object *ref; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; drm_modeset_lock_all(dev); arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); if (!arg_obj) { ret = -ENOENT; goto out; } if (!arg_obj->properties) goto out_unref; for (i = 0; i < arg_obj->properties->count; i++) if (arg_obj->properties->properties[i]->base.id == arg->prop_id) break; if (i == arg_obj->properties->count) goto out_unref; prop_obj = drm_mode_object_find(dev, arg->prop_id, DRM_MODE_OBJECT_PROPERTY); if (!prop_obj) { ret = -ENOENT; goto out_unref; } property = obj_to_property(prop_obj); if (!drm_property_change_valid_get(property, arg->value, &ref)) goto out_unref; switch (arg_obj->type) { case DRM_MODE_OBJECT_CONNECTOR: ret = drm_mode_connector_set_obj_prop(arg_obj, property, arg->value); break; case DRM_MODE_OBJECT_CRTC: ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); break; case DRM_MODE_OBJECT_PLANE: ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), property, arg->value); break; } drm_property_change_valid_put(property, ref); out_unref: drm_mode_object_unreference(arg_obj); out: drm_modeset_unlock_all(dev); return ret; } /** * drm_mode_connector_attach_encoder - attach a connector to an encoder * @connector: connector to attach * @encoder: encoder to attach @connector to * * This function links up a connector to an encoder. Note that the routing * restrictions between encoders and crtcs are exposed to userspace through the * possible_clones and possible_crtcs bitmasks. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_connector_attach_encoder(struct drm_connector *connector, struct drm_encoder *encoder) { int i; /* * In the past, drivers have attempted to model the static association * of connector to encoder in simple connector/encoder devices using a * direct assignment of connector->encoder = encoder. This connection * is a logical one and the responsibility of the core, so drivers are * expected not to mess with this. * * Note that the error return should've been enough here, but a large * majority of drivers ignores the return value, so add in a big WARN * to get people's attention. */ if (WARN_ON(connector->encoder)) return -EINVAL; for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { if (connector->encoder_ids[i] == 0) { connector->encoder_ids[i] = encoder->base.id; return 0; } } return -ENOMEM; } EXPORT_SYMBOL(drm_mode_connector_attach_encoder); /** * drm_mode_crtc_set_gamma_size - set the gamma table size * @crtc: CRTC to set the gamma table size for * @gamma_size: size of the gamma table * * Drivers which support gamma tables should set this to the supported gamma * table size when initializing the CRTC. Currently the drm core only supports a * fixed gamma table size. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, int gamma_size) { uint16_t *r_base, *g_base, *b_base; int i; crtc->gamma_size = gamma_size; crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, GFP_KERNEL); if (!crtc->gamma_store) { crtc->gamma_size = 0; return -ENOMEM; } r_base = crtc->gamma_store; g_base = r_base + gamma_size; b_base = g_base + gamma_size; for (i = 0; i < gamma_size; i++) { r_base[i] = i << 8; g_base[i] = i << 8; b_base[i] = i << 8; } return 0; } EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); /** * drm_mode_gamma_set_ioctl - set the gamma table * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * Set the gamma table of a CRTC to the one passed in by the user. Userspace can * inquire the required gamma table size through drm_mode_gamma_get_ioctl. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_gamma_set_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_crtc_lut *crtc_lut = data; struct drm_crtc *crtc; void *r_base, *g_base, *b_base; int size; int ret = 0; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; drm_modeset_lock_all(dev); crtc = drm_crtc_find(dev, crtc_lut->crtc_id); if (!crtc) { ret = -ENOENT; goto out; } if (crtc->funcs->gamma_set == NULL) { ret = -ENOSYS; goto out; } /* memcpy into gamma store */ if (crtc_lut->gamma_size != crtc->gamma_size) { ret = -EINVAL; goto out; } size = crtc_lut->gamma_size * (sizeof(uint16_t)); r_base = crtc->gamma_store; if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { ret = -EFAULT; goto out; } g_base = r_base + size; if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { ret = -EFAULT; goto out; } b_base = g_base + size; if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { ret = -EFAULT; goto out; } ret = crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size); out: drm_modeset_unlock_all(dev); return ret; } /** * drm_mode_gamma_get_ioctl - get the gamma table * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * Copy the current gamma table into the storage provided. This also provides * the gamma table size the driver expects, which can be used to size the * allocated storage. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_gamma_get_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_crtc_lut *crtc_lut = data; struct drm_crtc *crtc; void *r_base, *g_base, *b_base; int size; int ret = 0; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; drm_modeset_lock_all(dev); crtc = drm_crtc_find(dev, crtc_lut->crtc_id); if (!crtc) { ret = -ENOENT; goto out; } /* memcpy into gamma store */ if (crtc_lut->gamma_size != crtc->gamma_size) { ret = -EINVAL; goto out; } size = crtc_lut->gamma_size * (sizeof(uint16_t)); r_base = crtc->gamma_store; if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { ret = -EFAULT; goto out; } g_base = r_base + size; if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { ret = -EFAULT; goto out; } b_base = g_base + size; if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { ret = -EFAULT; goto out; } out: drm_modeset_unlock_all(dev); return ret; } /** * drm_mode_page_flip_ioctl - schedule an asynchronous fb update * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * This schedules an asynchronous update on a given CRTC, called page flip. * Optionally a drm event is generated to signal the completion of the event. * Generic drivers cannot assume that a pageflip with changed framebuffer * properties (including driver specific metadata like tiling layout) will work, * but some drivers support e.g. pixel format changes through the pageflip * ioctl. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_page_flip_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_crtc_page_flip *page_flip = data; struct drm_crtc *crtc; struct drm_framebuffer *fb = NULL; struct drm_pending_vblank_event *e = NULL; int ret = -EINVAL; if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || page_flip->reserved != 0) return -EINVAL; if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) return -EINVAL; crtc = drm_crtc_find(dev, page_flip->crtc_id); if (!crtc) return -ENOENT; drm_modeset_lock_crtc(crtc, crtc->primary); if (crtc->primary->fb == NULL) { /* The framebuffer is currently unbound, presumably * due to a hotplug event, that userspace has not * yet discovered. */ ret = -EBUSY; goto out; } if (crtc->funcs->page_flip == NULL) goto out; fb = drm_framebuffer_lookup(dev, page_flip->fb_id); if (!fb) { ret = -ENOENT; goto out; } if (crtc->state) { const struct drm_plane_state *state = crtc->primary->state; ret = check_src_coords(state->src_x, state->src_y, state->src_w, state->src_h, fb); } else { ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); } if (ret) goto out; if (crtc->primary->fb->pixel_format != fb->pixel_format) { DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); ret = -EINVAL; goto out; } if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { e = kzalloc(sizeof *e, GFP_KERNEL); if (!e) { ret = -ENOMEM; goto out; } e->event.base.type = DRM_EVENT_FLIP_COMPLETE; e->event.base.length = sizeof(e->event); e->event.user_data = page_flip->user_data; ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base); if (ret) { kfree(e); goto out; } } crtc->primary->old_fb = crtc->primary->fb; ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); if (ret) { if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) drm_event_cancel_free(dev, &e->base); /* Keep the old fb, don't unref it. */ crtc->primary->old_fb = NULL; } else { crtc->primary->fb = fb; /* Unref only the old framebuffer. */ fb = NULL; } out: if (fb) drm_framebuffer_unreference(fb); if (crtc->primary->old_fb) drm_framebuffer_unreference(crtc->primary->old_fb); crtc->primary->old_fb = NULL; drm_modeset_unlock_crtc(crtc); return ret; } /** * drm_mode_config_reset - call ->reset callbacks * @dev: drm device * * This functions calls all the crtc's, encoder's and connector's ->reset * callback. Drivers can use this in e.g. their driver load or resume code to * reset hardware and software state. */ void drm_mode_config_reset(struct drm_device *dev) { struct drm_crtc *crtc; struct drm_plane *plane; struct drm_encoder *encoder; struct drm_connector *connector; drm_for_each_plane(plane, dev) if (plane->funcs->reset) plane->funcs->reset(plane); drm_for_each_crtc(crtc, dev) if (crtc->funcs->reset) crtc->funcs->reset(crtc); drm_for_each_encoder(encoder, dev) if (encoder->funcs->reset) encoder->funcs->reset(encoder); mutex_lock(&dev->mode_config.mutex); drm_for_each_connector(connector, dev) if (connector->funcs->reset) connector->funcs->reset(connector); mutex_unlock(&dev->mode_config.mutex); } EXPORT_SYMBOL(drm_mode_config_reset); /** * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * This creates a new dumb buffer in the driver's backing storage manager (GEM, * TTM or something else entirely) and returns the resulting buffer handle. This * handle can then be wrapped up into a framebuffer modeset object. * * Note that userspace is not allowed to use such objects for render * acceleration - drivers must create their own private ioctls for such a use * case. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_create_dumb_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_create_dumb *args = data; u32 cpp, stride, size; if (!dev->driver->dumb_create) return -ENOSYS; if (!args->width || !args->height || !args->bpp) return -EINVAL; /* overflow checks for 32bit size calculations */ /* NOTE: DIV_ROUND_UP() can overflow */ cpp = DIV_ROUND_UP(args->bpp, 8); if (!cpp || cpp > 0xffffffffU / args->width) return -EINVAL; stride = cpp * args->width; if (args->height > 0xffffffffU / stride) return -EINVAL; /* test for wrap-around */ size = args->height * stride; if (PAGE_ALIGN(size) == 0) return -EINVAL; /* * handle, pitch and size are output parameters. Zero them out to * prevent drivers from accidentally using uninitialized data. Since * not all existing userspace is clearing these fields properly we * cannot reject IOCTL with garbage in them. */ args->handle = 0; args->pitch = 0; args->size = 0; return dev->driver->dumb_create(file_priv, dev, args); } /** * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * Allocate an offset in the drm device node's address space to be able to * memory map a dumb buffer. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_map_dumb *args = data; /* call driver ioctl to get mmap offset */ if (!dev->driver->dumb_map_offset) return -ENOSYS; return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); } /** * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer * @dev: DRM device * @data: ioctl data * @file_priv: DRM file info * * This destroys the userspace handle for the given dumb backing storage buffer. * Since buffer objects must be reference counted in the kernel a buffer object * won't be immediately freed if a framebuffer modeset object still uses it. * * Called by the user via ioctl. * * Returns: * Zero on success, negative errno on failure. */ int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_destroy_dumb *args = data; if (!dev->driver->dumb_destroy) return -ENOSYS; return dev->driver->dumb_destroy(file_priv, dev, args->handle); } /** * drm_rotation_simplify() - Try to simplify the rotation * @rotation: Rotation to be simplified * @supported_rotations: Supported rotations * * Attempt to simplify the rotation to a form that is supported. * Eg. if the hardware supports everything except DRM_REFLECT_X * one could call this function like this: * * drm_rotation_simplify(rotation, DRM_ROTATE_0 | * DRM_ROTATE_90 | DRM_ROTATE_180 | * DRM_ROTATE_270 | DRM_REFLECT_Y); * * to eliminate the DRM_ROTATE_X flag. Depending on what kind of * transforms the hardware supports, this function may not * be able to produce a supported transform, so the caller should * check the result afterwards. */ unsigned int drm_rotation_simplify(unsigned int rotation, unsigned int supported_rotations) { if (rotation & ~supported_rotations) { rotation ^= DRM_REFLECT_X | DRM_REFLECT_Y; rotation = (rotation & DRM_REFLECT_MASK) | BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); } return rotation; } EXPORT_SYMBOL(drm_rotation_simplify); /** * drm_mode_config_init - initialize DRM mode_configuration structure * @dev: DRM device * * Initialize @dev's mode_config structure, used for tracking the graphics * configuration of @dev. * * Since this initializes the modeset locks, no locking is possible. Which is no * problem, since this should happen single threaded at init time. It is the * driver's problem to ensure this guarantee. * */ void drm_mode_config_init(struct drm_device *dev) { mutex_init(&dev->mode_config.mutex); drm_modeset_lock_init(&dev->mode_config.connection_mutex); mutex_init(&dev->mode_config.idr_mutex); mutex_init(&dev->mode_config.fb_lock); mutex_init(&dev->mode_config.blob_lock); INIT_LIST_HEAD(&dev->mode_config.fb_list); INIT_LIST_HEAD(&dev->mode_config.crtc_list); INIT_LIST_HEAD(&dev->mode_config.connector_list); INIT_LIST_HEAD(&dev->mode_config.encoder_list); INIT_LIST_HEAD(&dev->mode_config.property_list); INIT_LIST_HEAD(&dev->mode_config.property_blob_list); INIT_LIST_HEAD(&dev->mode_config.plane_list); idr_init(&dev->mode_config.crtc_idr); idr_init(&dev->mode_config.tile_idr); ida_init(&dev->mode_config.connector_ida); drm_modeset_lock_all(dev); drm_mode_create_standard_properties(dev); drm_modeset_unlock_all(dev); /* Just to be sure */ dev->mode_config.num_fb = 0; dev->mode_config.num_connector = 0; dev->mode_config.num_crtc = 0; dev->mode_config.num_encoder = 0; dev->mode_config.num_overlay_plane = 0; dev->mode_config.num_total_plane = 0; } EXPORT_SYMBOL(drm_mode_config_init); /** * drm_mode_config_cleanup - free up DRM mode_config info * @dev: DRM device * * Free up all the connectors and CRTCs associated with this DRM device, then * free up the framebuffers and associated buffer objects. * * Note that since this /should/ happen single-threaded at driver/device * teardown time, no locking is required. It's the driver's job to ensure that * this guarantee actually holds true. * * FIXME: cleanup any dangling user buffer objects too */ void drm_mode_config_cleanup(struct drm_device *dev) { struct drm_connector *connector, *ot; struct drm_crtc *crtc, *ct; struct drm_encoder *encoder, *enct; struct drm_framebuffer *fb, *fbt; struct drm_property *property, *pt; struct drm_property_blob *blob, *bt; struct drm_plane *plane, *plt; list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, head) { encoder->funcs->destroy(encoder); } list_for_each_entry_safe(connector, ot, &dev->mode_config.connector_list, head) { connector->funcs->destroy(connector); } list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, head) { drm_property_destroy(dev, property); } list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, head) { plane->funcs->destroy(plane); } list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { crtc->funcs->destroy(crtc); } list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, head_global) { drm_property_unreference_blob(blob); } /* * Single-threaded teardown context, so it's not required to grab the * fb_lock to protect against concurrent fb_list access. Contrary, it * would actually deadlock with the drm_framebuffer_cleanup function. * * Also, if there are any framebuffers left, that's a driver leak now, * so politely WARN about this. */ WARN_ON(!list_empty(&dev->mode_config.fb_list)); list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { drm_framebuffer_free(&fb->base.refcount); } ida_destroy(&dev->mode_config.connector_ida); idr_destroy(&dev->mode_config.tile_idr); idr_destroy(&dev->mode_config.crtc_idr); drm_modeset_lock_fini(&dev->mode_config.connection_mutex); } EXPORT_SYMBOL(drm_mode_config_cleanup); struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, unsigned int supported_rotations) { static const struct drm_prop_enum_list props[] = { { __builtin_ffs(DRM_ROTATE_0) - 1, "rotate-0" }, { __builtin_ffs(DRM_ROTATE_90) - 1, "rotate-90" }, { __builtin_ffs(DRM_ROTATE_180) - 1, "rotate-180" }, { __builtin_ffs(DRM_ROTATE_270) - 1, "rotate-270" }, { __builtin_ffs(DRM_REFLECT_X) - 1, "reflect-x" }, { __builtin_ffs(DRM_REFLECT_Y) - 1, "reflect-y" }, }; return drm_property_create_bitmask(dev, 0, "rotation", props, ARRAY_SIZE(props), supported_rotations); } EXPORT_SYMBOL(drm_mode_create_rotation_property); /** * DOC: Tile group * * Tile groups are used to represent tiled monitors with a unique * integer identifier. Tiled monitors using DisplayID v1.3 have * a unique 8-byte handle, we store this in a tile group, so we * have a common identifier for all tiles in a monitor group. */ static void drm_tile_group_free(struct kref *kref) { struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); struct drm_device *dev = tg->dev; mutex_lock(&dev->mode_config.idr_mutex); idr_remove(&dev->mode_config.tile_idr, tg->id); mutex_unlock(&dev->mode_config.idr_mutex); kfree(tg); } /** * drm_mode_put_tile_group - drop a reference to a tile group. * @dev: DRM device * @tg: tile group to drop reference to. * * drop reference to tile group and free if 0. */ void drm_mode_put_tile_group(struct drm_device *dev, struct drm_tile_group *tg) { kref_put(&tg->refcount, drm_tile_group_free); } /** * drm_mode_get_tile_group - get a reference to an existing tile group * @dev: DRM device * @topology: 8-bytes unique per monitor. * * Use the unique bytes to get a reference to an existing tile group. * * RETURNS: * tile group or NULL if not found. */ struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, char topology[8]) { struct drm_tile_group *tg; int id; mutex_lock(&dev->mode_config.idr_mutex); idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { if (!memcmp(tg->group_data, topology, 8)) { if (!kref_get_unless_zero(&tg->refcount)) tg = NULL; mutex_unlock(&dev->mode_config.idr_mutex); return tg; } } mutex_unlock(&dev->mode_config.idr_mutex); return NULL; } EXPORT_SYMBOL(drm_mode_get_tile_group); /** * drm_mode_create_tile_group - create a tile group from a displayid description * @dev: DRM device * @topology: 8-bytes unique per monitor. * * Create a tile group for the unique monitor, and get a unique * identifier for the tile group. * * RETURNS: * new tile group or error. */ struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, char topology[8]) { struct drm_tile_group *tg; int ret; tg = kzalloc(sizeof(*tg), GFP_KERNEL); if (!tg) return ERR_PTR(-ENOMEM); kref_init(&tg->refcount); memcpy(tg->group_data, topology, 8); tg->dev = dev; mutex_lock(&dev->mode_config.idr_mutex); ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); if (ret >= 0) { tg->id = ret; } else { kfree(tg); tg = ERR_PTR(ret); } mutex_unlock(&dev->mode_config.idr_mutex); return tg; } EXPORT_SYMBOL(drm_mode_create_tile_group); /** * drm_crtc_enable_color_mgmt - enable color management properties * @crtc: DRM CRTC * @degamma_lut_size: the size of the degamma lut (before CSC) * @has_ctm: whether to attach ctm_property for CSC matrix * @gamma_lut_size: the size of the gamma lut (after CSC) * * This function lets the driver enable the color correction * properties on a CRTC. This includes 3 degamma, csc and gamma * properties that userspace can set and 2 size properties to inform * the userspace of the lut sizes. Each of the properties are * optional. The gamma and degamma properties are only attached if * their size is not 0 and ctm_property is only attached if has_ctm is * true. */ void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, uint degamma_lut_size, bool has_ctm, uint gamma_lut_size) { struct drm_device *dev = crtc->dev; struct drm_mode_config *config = &dev->mode_config; if (degamma_lut_size) { drm_object_attach_property(&crtc->base, config->degamma_lut_property, 0); drm_object_attach_property(&crtc->base, config->degamma_lut_size_property, degamma_lut_size); } if (has_ctm) drm_object_attach_property(&crtc->base, config->ctm_property, 0); if (gamma_lut_size) { drm_object_attach_property(&crtc->base, config->gamma_lut_property, 0); drm_object_attach_property(&crtc->base, config->gamma_lut_size_property, gamma_lut_size); } } EXPORT_SYMBOL(drm_crtc_enable_color_mgmt);