/* * Copyright © 2006 Keith Packard * Copyright © 2007-2008 Dave Airlie * Copyright © 2007-2008 Intel Corporation * Jesse Barnes * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #ifndef __DRM_CRTC_H__ #define __DRM_CRTC_H__ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct drm_device; struct drm_mode_set; struct drm_file; struct drm_clip_rect; struct device_node; struct fence; struct edid; static inline int64_t U642I64(uint64_t val) { return (int64_t)*((int64_t *)&val); } static inline uint64_t I642U64(int64_t val) { return (uint64_t)*((uint64_t *)&val); } /* * Rotation property bits. DRM_ROTATE_ rotates the image by the * specified amount in degrees in counter clockwise direction. DRM_REFLECT_X and * DRM_REFLECT_Y reflects the image along the specified axis prior to rotation */ #define DRM_ROTATE_0 BIT(0) #define DRM_ROTATE_90 BIT(1) #define DRM_ROTATE_180 BIT(2) #define DRM_ROTATE_270 BIT(3) #define DRM_ROTATE_MASK (DRM_ROTATE_0 | DRM_ROTATE_90 | \ DRM_ROTATE_180 | DRM_ROTATE_270) #define DRM_REFLECT_X BIT(4) #define DRM_REFLECT_Y BIT(5) #define DRM_REFLECT_MASK (DRM_REFLECT_X | DRM_REFLECT_Y) /* data corresponds to displayid vend/prod/serial */ struct drm_tile_group { struct kref refcount; struct drm_device *dev; int id; u8 group_data[8]; }; struct drm_property_blob { struct drm_mode_object base; struct drm_device *dev; struct list_head head_global; struct list_head head_file; size_t length; unsigned char data[]; }; struct drm_property_enum { uint64_t value; struct list_head head; char name[DRM_PROP_NAME_LEN]; }; struct drm_property { struct list_head head; struct drm_mode_object base; uint32_t flags; char name[DRM_PROP_NAME_LEN]; uint32_t num_values; uint64_t *values; struct drm_device *dev; struct list_head enum_list; }; struct drm_crtc; struct drm_encoder; struct drm_pending_vblank_event; struct drm_plane; struct drm_bridge; struct drm_atomic_state; struct drm_crtc_helper_funcs; struct drm_encoder_helper_funcs; struct drm_plane_helper_funcs; /** * struct drm_crtc_state - mutable CRTC state * @crtc: backpointer to the CRTC * @enable: whether the CRTC should be enabled, gates all other state * @active: whether the CRTC is actively displaying (used for DPMS) * @planes_changed: planes on this crtc are updated * @mode_changed: crtc_state->mode or crtc_state->enable has been changed * @active_changed: crtc_state->active has been toggled. * @connectors_changed: connectors to this crtc have been updated * @zpos_changed: zpos values of planes on this crtc have been updated * @color_mgmt_changed: color management properties have changed (degamma or * gamma LUT or CSC matrix) * @plane_mask: bitmask of (1 << drm_plane_index(plane)) of attached planes * @connector_mask: bitmask of (1 << drm_connector_index(connector)) of attached connectors * @encoder_mask: bitmask of (1 << drm_encoder_index(encoder)) of attached encoders * @last_vblank_count: for helpers and drivers to capture the vblank of the * update to ensure framebuffer cleanup isn't done too early * @adjusted_mode: for use by helpers and drivers to compute adjusted mode timings * @mode: current mode timings * @mode_blob: &drm_property_blob for @mode * @degamma_lut: Lookup table for converting framebuffer pixel data * before apply the conversion matrix * @ctm: Transformation matrix * @gamma_lut: Lookup table for converting pixel data after the * conversion matrix * @event: optional pointer to a DRM event to signal upon completion of the * state update * @state: backpointer to global drm_atomic_state * * Note that the distinction between @enable and @active is rather subtile: * Flipping @active while @enable is set without changing anything else may * never return in a failure from the ->atomic_check callback. Userspace assumes * that a DPMS On will always succeed. In other words: @enable controls resource * assignment, @active controls the actual hardware state. */ struct drm_crtc_state { struct drm_crtc *crtc; bool enable; bool active; /* computed state bits used by helpers and drivers */ bool planes_changed : 1; bool mode_changed : 1; bool active_changed : 1; bool connectors_changed : 1; bool zpos_changed : 1; bool color_mgmt_changed : 1; /* attached planes bitmask: * WARNING: transitional helpers do not maintain plane_mask so * drivers not converted over to atomic helpers should not rely * on plane_mask being accurate! */ u32 plane_mask; u32 connector_mask; u32 encoder_mask; /* last_vblank_count: for vblank waits before cleanup */ u32 last_vblank_count; /* adjusted_mode: for use by helpers and drivers */ struct drm_display_mode adjusted_mode; struct drm_display_mode mode; /* blob property to expose current mode to atomic userspace */ struct drm_property_blob *mode_blob; /* blob property to expose color management to userspace */ struct drm_property_blob *degamma_lut; struct drm_property_blob *ctm; struct drm_property_blob *gamma_lut; struct drm_pending_vblank_event *event; struct drm_atomic_state *state; }; /** * struct drm_crtc_funcs - control CRTCs for a given device * * The drm_crtc_funcs structure is the central CRTC management structure * in the DRM. Each CRTC controls one or more connectors (note that the name * CRTC is simply historical, a CRTC may control LVDS, VGA, DVI, TV out, etc. * connectors, not just CRTs). * * Each driver is responsible for filling out this structure at startup time, * in addition to providing other modesetting features, like i2c and DDC * bus accessors. */ struct drm_crtc_funcs { /** * @reset: * * Reset CRTC hardware and software state to off. This function isn't * called by the core directly, only through drm_mode_config_reset(). * It's not a helper hook only for historical reasons. * * Atomic drivers can use drm_atomic_helper_crtc_reset() to reset * atomic state using this hook. */ void (*reset)(struct drm_crtc *crtc); /** * @cursor_set: * * Update the cursor image. The cursor position is relative to the CRTC * and can be partially or fully outside of the visible area. * * Note that contrary to all other KMS functions the legacy cursor entry * points don't take a framebuffer object, but instead take directly a * raw buffer object id from the driver's buffer manager (which is * either GEM or TTM for current drivers). * * This entry point is deprecated, drivers should instead implement * universal plane support and register a proper cursor plane using * drm_crtc_init_with_planes(). * * This callback is optional * * RETURNS: * * 0 on success or a negative error code on failure. */ int (*cursor_set)(struct drm_crtc *crtc, struct drm_file *file_priv, uint32_t handle, uint32_t width, uint32_t height); /** * @cursor_set2: * * Update the cursor image, including hotspot information. The hotspot * must not affect the cursor position in CRTC coordinates, but is only * meant as a hint for virtualized display hardware to coordinate the * guests and hosts cursor position. The cursor hotspot is relative to * the cursor image. Otherwise this works exactly like @cursor_set. * * This entry point is deprecated, drivers should instead implement * universal plane support and register a proper cursor plane using * drm_crtc_init_with_planes(). * * This callback is optional. * * RETURNS: * * 0 on success or a negative error code on failure. */ int (*cursor_set2)(struct drm_crtc *crtc, struct drm_file *file_priv, uint32_t handle, uint32_t width, uint32_t height, int32_t hot_x, int32_t hot_y); /** * @cursor_move: * * Update the cursor position. The cursor does not need to be visible * when this hook is called. * * This entry point is deprecated, drivers should instead implement * universal plane support and register a proper cursor plane using * drm_crtc_init_with_planes(). * * This callback is optional. * * RETURNS: * * 0 on success or a negative error code on failure. */ int (*cursor_move)(struct drm_crtc *crtc, int x, int y); /** * @gamma_set: * * Set gamma on the CRTC. * * This callback is optional. * * NOTE: * * Drivers that support gamma tables and also fbdev emulation through * the provided helper library need to take care to fill out the gamma * hooks for both. Currently there's a bit an unfortunate duplication * going on, which should eventually be unified to just one set of * hooks. */ int (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b, uint32_t size); /** * @destroy: * * Clean up plane resources. This is only called at driver unload time * through drm_mode_config_cleanup() since a CRTC cannot be hotplugged * in DRM. */ void (*destroy)(struct drm_crtc *crtc); /** * @set_config: * * This is the main legacy entry point to change the modeset state on a * CRTC. All the details of the desired configuration are passed in a * struct &drm_mode_set - see there for details. * * Drivers implementing atomic modeset should use * drm_atomic_helper_set_config() to implement this hook. * * RETURNS: * * 0 on success or a negative error code on failure. */ int (*set_config)(struct drm_mode_set *set); /** * @page_flip: * * Legacy entry point to schedule a flip to the given framebuffer. * * Page flipping is a synchronization mechanism that replaces the frame * buffer being scanned out by the CRTC with a new frame buffer during * vertical blanking, avoiding tearing (except when requested otherwise * through the DRM_MODE_PAGE_FLIP_ASYNC flag). When an application * requests a page flip the DRM core verifies that the new frame buffer * is large enough to be scanned out by the CRTC in the currently * configured mode and then calls the CRTC ->page_flip() operation with a * pointer to the new frame buffer. * * The driver must wait for any pending rendering to the new framebuffer * to complete before executing the flip. It should also wait for any * pending rendering from other drivers if the underlying buffer is a * shared dma-buf. * * An application can request to be notified when the page flip has * completed. The drm core will supply a struct &drm_event in the event * parameter in this case. This can be handled by the * drm_crtc_send_vblank_event() function, which the driver should call on * the provided event upon completion of the flip. Note that if * the driver supports vblank signalling and timestamping the vblank * counters and timestamps must agree with the ones returned from page * flip events. With the current vblank helper infrastructure this can * be achieved by holding a vblank reference while the page flip is * pending, acquired through drm_crtc_vblank_get() and released with * drm_crtc_vblank_put(). Drivers are free to implement their own vblank * counter and timestamp tracking though, e.g. if they have accurate * timestamp registers in hardware. * * This callback is optional. * * NOTE: * * Very early versions of the KMS ABI mandated that the driver must * block (but not reject) any rendering to the old framebuffer until the * flip operation has completed and the old framebuffer is no longer * visible. This requirement has been lifted, and userspace is instead * expected to request delivery of an event and wait with recycling old * buffers until such has been received. * * RETURNS: * * 0 on success or a negative error code on failure. Note that if a * ->page_flip() operation is already pending the callback should return * -EBUSY. Pageflips on a disabled CRTC (either by setting a NULL mode * or just runtime disabled through DPMS respectively the new atomic * "ACTIVE" state) should result in an -EINVAL error code. Note that * drm_atomic_helper_page_flip() checks this already for atomic drivers. */ int (*page_flip)(struct drm_crtc *crtc, struct drm_framebuffer *fb, struct drm_pending_vblank_event *event, uint32_t flags); /** * @set_property: * * This is the legacy entry point to update a property attached to the * CRTC. * * Drivers implementing atomic modeset should use * drm_atomic_helper_crtc_set_property() to implement this hook. * * This callback is optional if the driver does not support any legacy * driver-private properties. * * RETURNS: * * 0 on success or a negative error code on failure. */ int (*set_property)(struct drm_crtc *crtc, struct drm_property *property, uint64_t val); /** * @atomic_duplicate_state: * * Duplicate the current atomic state for this CRTC and return it. * The core and helpers gurantee that any atomic state duplicated with * this hook and still owned by the caller (i.e. not transferred to the * driver by calling ->atomic_commit() from struct * &drm_mode_config_funcs) will be cleaned up by calling the * @atomic_destroy_state hook in this structure. * * Atomic drivers which don't subclass struct &drm_crtc should use * drm_atomic_helper_crtc_duplicate_state(). Drivers that subclass the * state structure to extend it with driver-private state should use * __drm_atomic_helper_crtc_duplicate_state() to make sure shared state is * duplicated in a consistent fashion across drivers. * * It is an error to call this hook before crtc->state has been * initialized correctly. * * NOTE: * * If the duplicate state references refcounted resources this hook must * acquire a reference for each of them. The driver must release these * references again in @atomic_destroy_state. * * RETURNS: * * Duplicated atomic state or NULL when the allocation failed. */ struct drm_crtc_state *(*atomic_duplicate_state)(struct drm_crtc *crtc); /** * @atomic_destroy_state: * * Destroy a state duplicated with @atomic_duplicate_state and release * or unreference all resources it references */ void (*atomic_destroy_state)(struct drm_crtc *crtc, struct drm_crtc_state *state); /** * @atomic_set_property: * * Decode a driver-private property value and store the decoded value * into the passed-in state structure. Since the atomic core decodes all * standardized properties (even for extensions beyond the core set of * properties which might not be implemented by all drivers) this * requires drivers to subclass the state structure. * * Such driver-private properties should really only be implemented for * truly hardware/vendor specific state. Instead it is preferred to * standardize atomic extension and decode the properties used to expose * such an extension in the core. * * Do not call this function directly, use * drm_atomic_crtc_set_property() instead. * * This callback is optional if the driver does not support any * driver-private atomic properties. * * NOTE: * * This function is called in the state assembly phase of atomic * modesets, which can be aborted for any reason (including on * userspace's request to just check whether a configuration would be * possible). Drivers MUST NOT touch any persistent state (hardware or * software) or data structures except the passed in @state parameter. * * Also since userspace controls in which order properties are set this * function must not do any input validation (since the state update is * incomplete and hence likely inconsistent). Instead any such input * validation must be done in the various atomic_check callbacks. * * RETURNS: * * 0 if the property has been found, -EINVAL if the property isn't * implemented by the driver (which should never happen, the core only * asks for properties attached to this CRTC). No other validation is * allowed by the driver. The core already checks that the property * value is within the range (integer, valid enum value, ...) the driver * set when registering the property. */ int (*atomic_set_property)(struct drm_crtc *crtc, struct drm_crtc_state *state, struct drm_property *property, uint64_t val); /** * @atomic_get_property: * * Reads out the decoded driver-private property. This is used to * implement the GETCRTC IOCTL. * * Do not call this function directly, use * drm_atomic_crtc_get_property() instead. * * This callback is optional if the driver does not support any * driver-private atomic properties. * * RETURNS: * * 0 on success, -EINVAL if the property isn't implemented by the * driver (which should never happen, the core only asks for * properties attached to this CRTC). */ int (*atomic_get_property)(struct drm_crtc *crtc, const struct drm_crtc_state *state, struct drm_property *property, uint64_t *val); /** * @late_register: * * This optional hook can be used to register additional userspace * interfaces attached to the crtc like debugfs interfaces. * It is called late in the driver load sequence from drm_dev_register(). * Everything added from this callback should be unregistered in * the early_unregister callback. * * Returns: * * 0 on success, or a negative error code on failure. */ int (*late_register)(struct drm_crtc *crtc); /** * @early_unregister: * * This optional hook should be used to unregister the additional * userspace interfaces attached to the crtc from * late_unregister(). It is called from drm_dev_unregister(), * early in the driver unload sequence to disable userspace access * before data structures are torndown. */ void (*early_unregister)(struct drm_crtc *crtc); }; /** * struct drm_crtc - central CRTC control structure * @dev: parent DRM device * @port: OF node used by drm_of_find_possible_crtcs() * @head: list management * @name: human readable name, can be overwritten by the driver * @mutex: per-CRTC locking * @base: base KMS object for ID tracking etc. * @primary: primary plane for this CRTC * @cursor: cursor plane for this CRTC * @cursor_x: current x position of the cursor, used for universal cursor planes * @cursor_y: current y position of the cursor, used for universal cursor planes * @enabled: is this CRTC enabled? * @mode: current mode timings * @hwmode: mode timings as programmed to hw regs * @x: x position on screen * @y: y position on screen * @funcs: CRTC control functions * @gamma_size: size of gamma ramp * @gamma_store: gamma ramp values * @helper_private: mid-layer private data * @properties: property tracking for this CRTC * * Each CRTC may have one or more connectors associated with it. This structure * allows the CRTC to be controlled. */ struct drm_crtc { struct drm_device *dev; struct device_node *port; struct list_head head; char *name; /** * @mutex: * * This provides a read lock for the overall crtc state (mode, dpms * state, ...) and a write lock for everything which can be update * without a full modeset (fb, cursor data, crtc properties ...). Full * modeset also need to grab dev->mode_config.connection_mutex. */ struct drm_modeset_lock mutex; struct drm_mode_object base; /* primary and cursor planes for CRTC */ struct drm_plane *primary; struct drm_plane *cursor; /** * @index: Position inside the mode_config.list, can be used as an array * index. It is invariant over the lifetime of the CRTC. */ unsigned index; /* position of cursor plane on crtc */ int cursor_x; int cursor_y; bool enabled; /* Requested mode from modesetting. */ struct drm_display_mode mode; /* Programmed mode in hw, after adjustments for encoders, * crtc, panel scaling etc. Needed for timestamping etc. */ struct drm_display_mode hwmode; int x, y; const struct drm_crtc_funcs *funcs; /* Legacy FB CRTC gamma size for reporting to userspace */ uint32_t gamma_size; uint16_t *gamma_store; /* if you are using the helper */ const struct drm_crtc_helper_funcs *helper_private; struct drm_object_properties properties; /** * @state: * * Current atomic state for this CRTC. */ struct drm_crtc_state *state; /** * @commit_list: * * List of &drm_crtc_commit structures tracking pending commits. * Protected by @commit_lock. This list doesn't hold its own full * reference, but burrows it from the ongoing commit. Commit entries * must be removed from this list once the commit is fully completed, * but before it's correspoding &drm_atomic_state gets destroyed. */ struct list_head commit_list; /** * @commit_lock: * * Spinlock to protect @commit_list. */ spinlock_t commit_lock; /** * @acquire_ctx: * * Per-CRTC implicit acquire context used by atomic drivers for legacy * IOCTLs, so that atomic drivers can get at the locking acquire * context. */ struct drm_modeset_acquire_ctx *acquire_ctx; }; /** * struct drm_encoder_funcs - encoder controls * * Encoders sit between CRTCs and connectors. */ struct drm_encoder_funcs { /** * @reset: * * Reset encoder hardware and software state to off. This function isn't * called by the core directly, only through drm_mode_config_reset(). * It's not a helper hook only for historical reasons. */ void (*reset)(struct drm_encoder *encoder); /** * @destroy: * * Clean up encoder resources. This is only called at driver unload time * through drm_mode_config_cleanup() since an encoder cannot be * hotplugged in DRM. */ void (*destroy)(struct drm_encoder *encoder); /** * @late_register: * * This optional hook can be used to register additional userspace * interfaces attached to the encoder like debugfs interfaces. * It is called late in the driver load sequence from drm_dev_register(). * Everything added from this callback should be unregistered in * the early_unregister callback. * * Returns: * * 0 on success, or a negative error code on failure. */ int (*late_register)(struct drm_encoder *encoder); /** * @early_unregister: * * This optional hook should be used to unregister the additional * userspace interfaces attached to the encoder from * late_unregister(). It is called from drm_dev_unregister(), * early in the driver unload sequence to disable userspace access * before data structures are torndown. */ void (*early_unregister)(struct drm_encoder *encoder); }; /** * struct drm_encoder - central DRM encoder structure * @dev: parent DRM device * @head: list management * @base: base KMS object * @name: human readable name, can be overwritten by the driver * @encoder_type: one of the DRM_MODE_ENCODER_ types in drm_mode.h * @possible_crtcs: bitmask of potential CRTC bindings * @possible_clones: bitmask of potential sibling encoders for cloning * @crtc: currently bound CRTC * @bridge: bridge associated to the encoder * @funcs: control functions * @helper_private: mid-layer private data * * CRTCs drive pixels to encoders, which convert them into signals * appropriate for a given connector or set of connectors. */ struct drm_encoder { struct drm_device *dev; struct list_head head; struct drm_mode_object base; char *name; int encoder_type; /** * @index: Position inside the mode_config.list, can be used as an array * index. It is invariant over the lifetime of the encoder. */ unsigned index; uint32_t possible_crtcs; uint32_t possible_clones; struct drm_crtc *crtc; struct drm_bridge *bridge; const struct drm_encoder_funcs *funcs; const struct drm_encoder_helper_funcs *helper_private; }; /** * struct drm_plane_state - mutable plane state * @plane: backpointer to the plane * @crtc: currently bound CRTC, NULL if disabled * @fb: currently bound framebuffer * @fence: optional fence to wait for before scanning out @fb * @crtc_x: left position of visible portion of plane on crtc * @crtc_y: upper position of visible portion of plane on crtc * @crtc_w: width of visible portion of plane on crtc * @crtc_h: height of visible portion of plane on crtc * @src_x: left position of visible portion of plane within * plane (in 16.16) * @src_y: upper position of visible portion of plane within * plane (in 16.16) * @src_w: width of visible portion of plane (in 16.16) * @src_h: height of visible portion of plane (in 16.16) * @rotation: rotation of the plane * @zpos: priority of the given plane on crtc (optional) * @normalized_zpos: normalized value of zpos: unique, range from 0 to N-1 * where N is the number of active planes for given crtc * @src: clipped source coordinates of the plane (in 16.16) * @dst: clipped destination coordinates of the plane * @visible: visibility of the plane * @state: backpointer to global drm_atomic_state */ struct drm_plane_state { struct drm_plane *plane; struct drm_crtc *crtc; /* do not write directly, use drm_atomic_set_crtc_for_plane() */ struct drm_framebuffer *fb; /* do not write directly, use drm_atomic_set_fb_for_plane() */ struct fence *fence; /* Signed dest location allows it to be partially off screen */ int32_t crtc_x, crtc_y; uint32_t crtc_w, crtc_h; /* Source values are 16.16 fixed point */ uint32_t src_x, src_y; uint32_t src_h, src_w; /* Plane rotation */ unsigned int rotation; /* Plane zpos */ unsigned int zpos; unsigned int normalized_zpos; /* Clipped coordinates */ struct drm_rect src, dst; /* * Is the plane actually visible? Can be false even * if fb!=NULL and crtc!=NULL, due to clipping. */ bool visible; struct drm_atomic_state *state; }; /** * struct drm_plane_funcs - driver plane control functions */ struct drm_plane_funcs { /** * @update_plane: * * This is the legacy entry point to enable and configure the plane for * the given CRTC and framebuffer. It is never called to disable the * plane, i.e. the passed-in crtc and fb paramters are never NULL. * * The source rectangle in frame buffer memory coordinates is given by * the src_x, src_y, src_w and src_h parameters (as 16.16 fixed point * values). Devices that don't support subpixel plane coordinates can * ignore the fractional part. * * The destination rectangle in CRTC coordinates is given by the * crtc_x, crtc_y, crtc_w and crtc_h parameters (as integer values). * Devices scale the source rectangle to the destination rectangle. If * scaling is not supported, and the source rectangle size doesn't match * the destination rectangle size, the driver must return a * -EINVAL error. * * Drivers implementing atomic modeset should use * drm_atomic_helper_update_plane() to implement this hook. * * RETURNS: * * 0 on success or a negative error code on failure. */ int (*update_plane)(struct drm_plane *plane, struct drm_crtc *crtc, struct drm_framebuffer *fb, int crtc_x, int crtc_y, unsigned int crtc_w, unsigned int crtc_h, uint32_t src_x, uint32_t src_y, uint32_t src_w, uint32_t src_h); /** * @disable_plane: * * This is the legacy entry point to disable the plane. The DRM core * calls this method in response to a DRM_IOCTL_MODE_SETPLANE IOCTL call * with the frame buffer ID set to 0. Disabled planes must not be * processed by the CRTC. * * Drivers implementing atomic modeset should use * drm_atomic_helper_disable_plane() to implement this hook. * * RETURNS: * * 0 on success or a negative error code on failure. */ int (*disable_plane)(struct drm_plane *plane); /** * @destroy: * * Clean up plane resources. This is only called at driver unload time * through drm_mode_config_cleanup() since a plane cannot be hotplugged * in DRM. */ void (*destroy)(struct drm_plane *plane); /** * @reset: * * Reset plane hardware and software state to off. This function isn't * called by the core directly, only through drm_mode_config_reset(). * It's not a helper hook only for historical reasons. * * Atomic drivers can use drm_atomic_helper_plane_reset() to reset * atomic state using this hook. */ void (*reset)(struct drm_plane *plane); /** * @set_property: * * This is the legacy entry point to update a property attached to the * plane. * * Drivers implementing atomic modeset should use * drm_atomic_helper_plane_set_property() to implement this hook. * * This callback is optional if the driver does not support any legacy * driver-private properties. * * RETURNS: * * 0 on success or a negative error code on failure. */ int (*set_property)(struct drm_plane *plane, struct drm_property *property, uint64_t val); /** * @atomic_duplicate_state: * * Duplicate the current atomic state for this plane and return it. * The core and helpers gurantee that any atomic state duplicated with * this hook and still owned by the caller (i.e. not transferred to the * driver by calling ->atomic_commit() from struct * &drm_mode_config_funcs) will be cleaned up by calling the * @atomic_destroy_state hook in this structure. * * Atomic drivers which don't subclass struct &drm_plane_state should use * drm_atomic_helper_plane_duplicate_state(). Drivers that subclass the * state structure to extend it with driver-private state should use * __drm_atomic_helper_plane_duplicate_state() to make sure shared state is * duplicated in a consistent fashion across drivers. * * It is an error to call this hook before plane->state has been * initialized correctly. * * NOTE: * * If the duplicate state references refcounted resources this hook must * acquire a reference for each of them. The driver must release these * references again in @atomic_destroy_state. * * RETURNS: * * Duplicated atomic state or NULL when the allocation failed. */ struct drm_plane_state *(*atomic_duplicate_state)(struct drm_plane *plane); /** * @atomic_destroy_state: * * Destroy a state duplicated with @atomic_duplicate_state and release * or unreference all resources it references */ void (*atomic_destroy_state)(struct drm_plane *plane, struct drm_plane_state *state); /** * @atomic_set_property: * * Decode a driver-private property value and store the decoded value * into the passed-in state structure. Since the atomic core decodes all * standardized properties (even for extensions beyond the core set of * properties which might not be implemented by all drivers) this * requires drivers to subclass the state structure. * * Such driver-private properties should really only be implemented for * truly hardware/vendor specific state. Instead it is preferred to * standardize atomic extension and decode the properties used to expose * such an extension in the core. * * Do not call this function directly, use * drm_atomic_plane_set_property() instead. * * This callback is optional if the driver does not support any * driver-private atomic properties. * * NOTE: * * This function is called in the state assembly phase of atomic * modesets, which can be aborted for any reason (including on * userspace's request to just check whether a configuration would be * possible). Drivers MUST NOT touch any persistent state (hardware or * software) or data structures except the passed in @state parameter. * * Also since userspace controls in which order properties are set this * function must not do any input validation (since the state update is * incomplete and hence likely inconsistent). Instead any such input * validation must be done in the various atomic_check callbacks. * * RETURNS: * * 0 if the property has been found, -EINVAL if the property isn't * implemented by the driver (which shouldn't ever happen, the core only * asks for properties attached to this plane). No other validation is * allowed by the driver. The core already checks that the property * value is within the range (integer, valid enum value, ...) the driver * set when registering the property. */ int (*atomic_set_property)(struct drm_plane *plane, struct drm_plane_state *state, struct drm_property *property, uint64_t val); /** * @atomic_get_property: * * Reads out the decoded driver-private property. This is used to * implement the GETPLANE IOCTL. * * Do not call this function directly, use * drm_atomic_plane_get_property() instead. * * This callback is optional if the driver does not support any * driver-private atomic properties. * * RETURNS: * * 0 on success, -EINVAL if the property isn't implemented by the * driver (which should never happen, the core only asks for * properties attached to this plane). */ int (*atomic_get_property)(struct drm_plane *plane, const struct drm_plane_state *state, struct drm_property *property, uint64_t *val); /** * @late_register: * * This optional hook can be used to register additional userspace * interfaces attached to the plane like debugfs interfaces. * It is called late in the driver load sequence from drm_dev_register(). * Everything added from this callback should be unregistered in * the early_unregister callback. * * Returns: * * 0 on success, or a negative error code on failure. */ int (*late_register)(struct drm_plane *plane); /** * @early_unregister: * * This optional hook should be used to unregister the additional * userspace interfaces attached to the plane from * late_unregister(). It is called from drm_dev_unregister(), * early in the driver unload sequence to disable userspace access * before data structures are torndown. */ void (*early_unregister)(struct drm_plane *plane); }; enum drm_plane_type { DRM_PLANE_TYPE_OVERLAY, DRM_PLANE_TYPE_PRIMARY, DRM_PLANE_TYPE_CURSOR, }; /** * struct drm_plane - central DRM plane control structure * @dev: DRM device this plane belongs to * @head: for list management * @name: human readable name, can be overwritten by the driver * @base: base mode object * @possible_crtcs: pipes this plane can be bound to * @format_types: array of formats supported by this plane * @format_count: number of formats supported * @format_default: driver hasn't supplied supported formats for the plane * @crtc: currently bound CRTC * @fb: currently bound fb * @old_fb: Temporary tracking of the old fb while a modeset is ongoing. Used by * drm_mode_set_config_internal() to implement correct refcounting. * @funcs: helper functions * @properties: property tracking for this plane * @type: type of plane (overlay, primary, cursor) * @state: current atomic state for this plane * @zpos_property: zpos property for this plane * @helper_private: mid-layer private data */ struct drm_plane { struct drm_device *dev; struct list_head head; char *name; /** * @mutex: * * Protects modeset plane state, together with the mutex of &drm_crtc * this plane is linked to (when active, getting actived or getting * disabled). */ struct drm_modeset_lock mutex; struct drm_mode_object base; uint32_t possible_crtcs; uint32_t *format_types; unsigned int format_count; bool format_default; struct drm_crtc *crtc; struct drm_framebuffer *fb; struct drm_framebuffer *old_fb; const struct drm_plane_funcs *funcs; struct drm_object_properties properties; enum drm_plane_type type; /** * @index: Position inside the mode_config.list, can be used as an array * index. It is invariant over the lifetime of the plane. */ unsigned index; const struct drm_plane_helper_funcs *helper_private; struct drm_plane_state *state; struct drm_property *zpos_property; }; /** * struct drm_bridge_funcs - drm_bridge control functions */ struct drm_bridge_funcs { /** * @attach: * * This callback is invoked whenever our bridge is being attached to a * &drm_encoder. * * The attach callback is optional. * * RETURNS: * * Zero on success, error code on failure. */ int (*attach)(struct drm_bridge *bridge); /** * @detach: * * This callback is invoked whenever our bridge is being detached from a * &drm_encoder. * * The detach callback is optional. */ void (*detach)(struct drm_bridge *bridge); /** * @mode_fixup: * * This callback is used to validate and adjust a mode. The paramater * mode is the display mode that should be fed to the next element in * the display chain, either the final &drm_connector or the next * &drm_bridge. The parameter adjusted_mode is the input mode the bridge * requires. It can be modified by this callback and does not need to * match mode. * * This is the only hook that allows a bridge to reject a modeset. If * this function passes all other callbacks must succeed for this * configuration. * * The mode_fixup callback is optional. * * NOTE: * * This function is called in the check phase of atomic modesets, which * can be aborted for any reason (including on userspace's request to * just check whether a configuration would be possible). Drivers MUST * NOT touch any persistent state (hardware or software) or data * structures except the passed in @state parameter. * * RETURNS: * * True if an acceptable configuration is possible, false if the modeset * operation should be rejected. */ bool (*mode_fixup)(struct drm_bridge *bridge, const struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode); /** * @disable: * * This callback should disable the bridge. It is called right before * the preceding element in the display pipe is disabled. If the * preceding element is a bridge this means it's called before that * bridge's ->disable() function. If the preceding element is a * &drm_encoder it's called right before the encoder's ->disable(), * ->prepare() or ->dpms() hook from struct &drm_encoder_helper_funcs. * * The bridge can assume that the display pipe (i.e. clocks and timing * signals) feeding it is still running when this callback is called. * * The disable callback is optional. */ void (*disable)(struct drm_bridge *bridge); /** * @post_disable: * * This callback should disable the bridge. It is called right after * the preceding element in the display pipe is disabled. If the * preceding element is a bridge this means it's called after that * bridge's ->post_disable() function. If the preceding element is a * &drm_encoder it's called right after the encoder's ->disable(), * ->prepare() or ->dpms() hook from struct &drm_encoder_helper_funcs. * * The bridge must assume that the display pipe (i.e. clocks and timing * singals) feeding it is no longer running when this callback is * called. * * The post_disable callback is optional. */ void (*post_disable)(struct drm_bridge *bridge); /** * @mode_set: * * This callback should set the given mode on the bridge. It is called * after the ->mode_set() callback for the preceding element in the * display pipeline has been called already. The display pipe (i.e. * clocks and timing signals) is off when this function is called. */ void (*mode_set)(struct drm_bridge *bridge, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode); /** * @pre_enable: * * This callback should enable the bridge. It is called right before * the preceding element in the display pipe is enabled. If the * preceding element is a bridge this means it's called before that * bridge's ->pre_enable() function. If the preceding element is a * &drm_encoder it's called right before the encoder's ->enable(), * ->commit() or ->dpms() hook from struct &drm_encoder_helper_funcs. * * The display pipe (i.e. clocks and timing signals) feeding this bridge * will not yet be running when this callback is called. The bridge must * not enable the display link feeding the next bridge in the chain (if * there is one) when this callback is called. * * The pre_enable callback is optional. */ void (*pre_enable)(struct drm_bridge *bridge); /** * @enable: * * This callback should enable the bridge. It is called right after * the preceding element in the display pipe is enabled. If the * preceding element is a bridge this means it's called after that * bridge's ->enable() function. If the preceding element is a * &drm_encoder it's called right after the encoder's ->enable(), * ->commit() or ->dpms() hook from struct &drm_encoder_helper_funcs. * * The bridge can assume that the display pipe (i.e. clocks and timing * signals) feeding it is running when this callback is called. This * callback must enable the display link feeding the next bridge in the * chain if there is one. * * The enable callback is optional. */ void (*enable)(struct drm_bridge *bridge); }; /** * struct drm_bridge - central DRM bridge control structure * @dev: DRM device this bridge belongs to * @encoder: encoder to which this bridge is connected * @next: the next bridge in the encoder chain * @of_node: device node pointer to the bridge * @list: to keep track of all added bridges * @funcs: control functions * @driver_private: pointer to the bridge driver's internal context */ struct drm_bridge { struct drm_device *dev; struct drm_encoder *encoder; struct drm_bridge *next; #ifdef CONFIG_OF struct device_node *of_node; #endif struct list_head list; const struct drm_bridge_funcs *funcs; void *driver_private; }; /** * struct drm_crtc_commit - track modeset commits on a CRTC * * This structure is used to track pending modeset changes and atomic commit on * a per-CRTC basis. Since updating the list should never block this structure * is reference counted to allow waiters to safely wait on an event to complete, * without holding any locks. * * It has 3 different events in total to allow a fine-grained synchronization * between outstanding updates:: * * atomic commit thread hardware * * write new state into hardware ----> ... * signal hw_done * switch to new state on next * ... v/hblank * * wait for buffers to show up ... * * ... send completion irq * irq handler signals flip_done * cleanup old buffers * * signal cleanup_done * * wait for flip_done <---- * clean up atomic state * * The important bit to know is that cleanup_done is the terminal event, but the * ordering between flip_done and hw_done is entirely up to the specific driver * and modeset state change. * * For an implementation of how to use this look at * drm_atomic_helper_setup_commit() from the atomic helper library. */ struct drm_crtc_commit { /** * @crtc: * * DRM CRTC for this commit. */ struct drm_crtc *crtc; /** * @ref: * * Reference count for this structure. Needed to allow blocking on * completions without the risk of the completion disappearing * meanwhile. */ struct kref ref; /** * @flip_done: * * Will be signaled when the hardware has flipped to the new set of * buffers. Signals at the same time as when the drm event for this * commit is sent to userspace, or when an out-fence is singalled. Note * that for most hardware, in most cases this happens after @hw_done is * signalled. */ struct completion flip_done; /** * @hw_done: * * Will be signalled when all hw register changes for this commit have * been written out. Especially when disabling a pipe this can be much * later than than @flip_done, since that can signal already when the * screen goes black, whereas to fully shut down a pipe more register * I/O is required. * * Note that this does not need to include separately reference-counted * resources like backing storage buffer pinning, or runtime pm * management. */ struct completion hw_done; /** * @cleanup_done: * * Will be signalled after old buffers have been cleaned up by calling * drm_atomic_helper_cleanup_planes(). Since this can only happen after * a vblank wait completed it might be a bit later. This completion is * useful to throttle updates and avoid hardware updates getting ahead * of the buffer cleanup too much. */ struct completion cleanup_done; /** * @commit_entry: * * Entry on the per-CRTC commit_list. Protected by crtc->commit_lock. */ struct list_head commit_entry; /** * @event: * * &drm_pending_vblank_event pointer to clean up private events. */ struct drm_pending_vblank_event *event; }; struct __drm_planes_state { struct drm_plane *ptr; struct drm_plane_state *state; }; struct __drm_crtcs_state { struct drm_crtc *ptr; struct drm_crtc_state *state; struct drm_crtc_commit *commit; }; struct __drm_connnectors_state { struct drm_connector *ptr; struct drm_connector_state *state; }; /** * struct drm_atomic_state - the global state object for atomic updates * @dev: parent DRM device * @allow_modeset: allow full modeset * @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics * @legacy_set_config: Disable conflicting encoders instead of failing with -EINVAL. * @planes: pointer to array of structures with per-plane data * @crtcs: pointer to array of CRTC pointers * @num_connector: size of the @connectors and @connector_states arrays * @connectors: pointer to array of structures with per-connector data * @acquire_ctx: acquire context for this atomic modeset state update */ struct drm_atomic_state { struct drm_device *dev; bool allow_modeset : 1; bool legacy_cursor_update : 1; bool legacy_set_config : 1; struct __drm_planes_state *planes; struct __drm_crtcs_state *crtcs; int num_connector; struct __drm_connnectors_state *connectors; struct drm_modeset_acquire_ctx *acquire_ctx; /** * @commit_work: * * Work item which can be used by the driver or helpers to execute the * commit without blocking. */ struct work_struct commit_work; }; /** * struct drm_mode_set - new values for a CRTC config change * @fb: framebuffer to use for new config * @crtc: CRTC whose configuration we're about to change * @mode: mode timings to use * @x: position of this CRTC relative to @fb * @y: position of this CRTC relative to @fb * @connectors: array of connectors to drive with this CRTC if possible * @num_connectors: size of @connectors array * * Represents a single crtc the connectors that it drives with what mode * and from which framebuffer it scans out from. * * This is used to set modes. */ struct drm_mode_set { struct drm_framebuffer *fb; struct drm_crtc *crtc; struct drm_display_mode *mode; uint32_t x; uint32_t y; struct drm_connector **connectors; size_t num_connectors; }; /** * struct drm_mode_config_funcs - basic driver provided mode setting functions * * Some global (i.e. not per-CRTC, connector, etc) mode setting functions that * involve drivers. */ struct drm_mode_config_funcs { /** * @fb_create: * * Create a new framebuffer object. The core does basic checks on the * requested metadata, but most of that is left to the driver. See * struct &drm_mode_fb_cmd2 for details. * * If the parameters are deemed valid and the backing storage objects in * the underlying memory manager all exist, then the driver allocates * a new &drm_framebuffer structure, subclassed to contain * driver-specific information (like the internal native buffer object * references). It also needs to fill out all relevant metadata, which * should be done by calling drm_helper_mode_fill_fb_struct(). * * The initialization is finalized by calling drm_framebuffer_init(), * which registers the framebuffer and makes it accessible to other * threads. * * RETURNS: * * A new framebuffer with an initial reference count of 1 or a negative * error code encoded with ERR_PTR(). */ struct drm_framebuffer *(*fb_create)(struct drm_device *dev, struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd); /** * @output_poll_changed: * * Callback used by helpers to inform the driver of output configuration * changes. * * Drivers implementing fbdev emulation with the helpers can call * drm_fb_helper_hotplug_changed from this hook to inform the fbdev * helper of output changes. * * FIXME: * * Except that there's no vtable for device-level helper callbacks * there's no reason this is a core function. */ void (*output_poll_changed)(struct drm_device *dev); /** * @atomic_check: * * This is the only hook to validate an atomic modeset update. This * function must reject any modeset and state changes which the hardware * or driver doesn't support. This includes but is of course not limited * to: * * - Checking that the modes, framebuffers, scaling and placement * requirements and so on are within the limits of the hardware. * * - Checking that any hidden shared resources are not oversubscribed. * This can be shared PLLs, shared lanes, overall memory bandwidth, * display fifo space (where shared between planes or maybe even * CRTCs). * * - Checking that virtualized resources exported to userspace are not * oversubscribed. For various reasons it can make sense to expose * more planes, crtcs or encoders than which are physically there. One * example is dual-pipe operations (which generally should be hidden * from userspace if when lockstepped in hardware, exposed otherwise), * where a plane might need 1 hardware plane (if it's just on one * pipe), 2 hardware planes (when it spans both pipes) or maybe even * shared a hardware plane with a 2nd plane (if there's a compatible * plane requested on the area handled by the other pipe). * * - Check that any transitional state is possible and that if * requested, the update can indeed be done in the vblank period * without temporarily disabling some functions. * * - Check any other constraints the driver or hardware might have. * * - This callback also needs to correctly fill out the &drm_crtc_state * in this update to make sure that drm_atomic_crtc_needs_modeset() * reflects the nature of the possible update and returns true if and * only if the update cannot be applied without tearing within one * vblank on that CRTC. The core uses that information to reject * updates which require a full modeset (i.e. blanking the screen, or * at least pausing updates for a substantial amount of time) if * userspace has disallowed that in its request. * * - The driver also does not need to repeat basic input validation * like done for the corresponding legacy entry points. The core does * that before calling this hook. * * See the documentation of @atomic_commit for an exhaustive list of * error conditions which don't have to be checked at the * ->atomic_check() stage? * * See the documentation for struct &drm_atomic_state for how exactly * an atomic modeset update is described. * * Drivers using the atomic helpers can implement this hook using * drm_atomic_helper_check(), or one of the exported sub-functions of * it. * * RETURNS: * * 0 on success or one of the below negative error codes: * * - -EINVAL, if any of the above constraints are violated. * * - -EDEADLK, when returned from an attempt to acquire an additional * &drm_modeset_lock through drm_modeset_lock(). * * - -ENOMEM, if allocating additional state sub-structures failed due * to lack of memory. * * - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted. * This can either be due to a pending signal, or because the driver * needs to completely bail out to recover from an exceptional * situation like a GPU hang. From a userspace point all errors are * treated equally. */ int (*atomic_check)(struct drm_device *dev, struct drm_atomic_state *state); /** * @atomic_commit: * * This is the only hook to commit an atomic modeset update. The core * guarantees that @atomic_check has been called successfully before * calling this function, and that nothing has been changed in the * interim. * * See the documentation for struct &drm_atomic_state for how exactly * an atomic modeset update is described. * * Drivers using the atomic helpers can implement this hook using * drm_atomic_helper_commit(), or one of the exported sub-functions of * it. * * Nonblocking commits (as indicated with the nonblock parameter) must * do any preparatory work which might result in an unsuccessful commit * in the context of this callback. The only exceptions are hardware * errors resulting in -EIO. But even in that case the driver must * ensure that the display pipe is at least running, to avoid * compositors crashing when pageflips don't work. Anything else, * specifically committing the update to the hardware, should be done * without blocking the caller. For updates which do not require a * modeset this must be guaranteed. * * The driver must wait for any pending rendering to the new * framebuffers to complete before executing the flip. It should also * wait for any pending rendering from other drivers if the underlying * buffer is a shared dma-buf. Nonblocking commits must not wait for * rendering in the context of this callback. * * An application can request to be notified when the atomic commit has * completed. These events are per-CRTC and can be distinguished by the * CRTC index supplied in &drm_event to userspace. * * The drm core will supply a struct &drm_event in the event * member of each CRTC's &drm_crtc_state structure. This can be handled by the * drm_crtc_send_vblank_event() function, which the driver should call on * the provided event upon completion of the atomic commit. Note that if * the driver supports vblank signalling and timestamping the vblank * counters and timestamps must agree with the ones returned from page * flip events. With the current vblank helper infrastructure this can * be achieved by holding a vblank reference while the page flip is * pending, acquired through drm_crtc_vblank_get() and released with * drm_crtc_vblank_put(). Drivers are free to implement their own vblank * counter and timestamp tracking though, e.g. if they have accurate * timestamp registers in hardware. * * NOTE: * * Drivers are not allowed to shut down any display pipe successfully * enabled through an atomic commit on their own. Doing so can result in * compositors crashing if a page flip is suddenly rejected because the * pipe is off. * * RETURNS: * * 0 on success or one of the below negative error codes: * * - -EBUSY, if a nonblocking updated is requested and there is * an earlier updated pending. Drivers are allowed to support a queue * of outstanding updates, but currently no driver supports that. * Note that drivers must wait for preceding updates to complete if a * synchronous update is requested, they are not allowed to fail the * commit in that case. * * - -ENOMEM, if the driver failed to allocate memory. Specifically * this can happen when trying to pin framebuffers, which must only * be done when committing the state. * * - -ENOSPC, as a refinement of the more generic -ENOMEM to indicate * that the driver has run out of vram, iommu space or similar GPU * address space needed for framebuffer. * * - -EIO, if the hardware completely died. * * - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted. * This can either be due to a pending signal, or because the driver * needs to completely bail out to recover from an exceptional * situation like a GPU hang. From a userspace point of view all errors are * treated equally. * * This list is exhaustive. Specifically this hook is not allowed to * return -EINVAL (any invalid requests should be caught in * @atomic_check) or -EDEADLK (this function must not acquire * additional modeset locks). */ int (*atomic_commit)(struct drm_device *dev, struct drm_atomic_state *state, bool nonblock); /** * @atomic_state_alloc: * * This optional hook can be used by drivers that want to subclass struct * &drm_atomic_state to be able to track their own driver-private global * state easily. If this hook is implemented, drivers must also * implement @atomic_state_clear and @atomic_state_free. * * RETURNS: * * A new &drm_atomic_state on success or NULL on failure. */ struct drm_atomic_state *(*atomic_state_alloc)(struct drm_device *dev); /** * @atomic_state_clear: * * This hook must clear any driver private state duplicated into the * passed-in &drm_atomic_state. This hook is called when the caller * encountered a &drm_modeset_lock deadlock and needs to drop all * already acquired locks as part of the deadlock avoidance dance * implemented in drm_modeset_lock_backoff(). * * Any duplicated state must be invalidated since a concurrent atomic * update might change it, and the drm atomic interfaces always apply * updates as relative changes to the current state. * * Drivers that implement this must call drm_atomic_state_default_clear() * to clear common state. */ void (*atomic_state_clear)(struct drm_atomic_state *state); /** * @atomic_state_free: * * This hook needs driver private resources and the &drm_atomic_state * itself. Note that the core first calls drm_atomic_state_clear() to * avoid code duplicate between the clear and free hooks. * * Drivers that implement this must call drm_atomic_state_default_free() * to release common resources. */ void (*atomic_state_free)(struct drm_atomic_state *state); }; /** * struct drm_mode_config - Mode configuration control structure * @mutex: mutex protecting KMS related lists and structures * @connection_mutex: ww mutex protecting connector state and routing * @acquire_ctx: global implicit acquire context used by atomic drivers for * legacy IOCTLs * @fb_lock: mutex to protect fb state and lists * @num_fb: number of fbs available * @fb_list: list of framebuffers available * @num_encoder: number of encoders on this device * @encoder_list: list of encoder objects * @num_overlay_plane: number of overlay planes on this device * @num_total_plane: number of universal (i.e. with primary/curso) planes on this device * @plane_list: list of plane objects * @num_crtc: number of CRTCs on this device * @crtc_list: list of CRTC objects * @property_list: list of property objects * @min_width: minimum pixel width on this device * @min_height: minimum pixel height on this device * @max_width: maximum pixel width on this device * @max_height: maximum pixel height on this device * @funcs: core driver provided mode setting functions * @fb_base: base address of the framebuffer * @poll_enabled: track polling support for this device * @poll_running: track polling status for this device * @delayed_event: track delayed poll uevent deliver for this device * @output_poll_work: delayed work for polling in process context * @property_blob_list: list of all the blob property objects * @blob_lock: mutex for blob property allocation and management * @*_property: core property tracking * @preferred_depth: preferred RBG pixel depth, used by fb helpers * @prefer_shadow: hint to userspace to prefer shadow-fb rendering * @cursor_width: hint to userspace for max cursor width * @cursor_height: hint to userspace for max cursor height * @helper_private: mid-layer private data * * Core mode resource tracking structure. All CRTC, encoders, and connectors * enumerated by the driver are added here, as are global properties. Some * global restrictions are also here, e.g. dimension restrictions. */ struct drm_mode_config { struct mutex mutex; /* protects configuration (mode lists etc.) */ struct drm_modeset_lock connection_mutex; /* protects connector->encoder and encoder->crtc links */ struct drm_modeset_acquire_ctx *acquire_ctx; /* for legacy _lock_all() / _unlock_all() */ /** * @idr_mutex: * * Mutex for KMS ID allocation and management. Protects both @crtc_idr * and @tile_idr. */ struct mutex idr_mutex; /** * @crtc_idr: * * Main KMS ID tracking object. Use this idr for all IDs, fb, crtc, * connector, modes - just makes life easier to have only one. */ struct idr crtc_idr; /** * @tile_idr: * * Use this idr for allocating new IDs for tiled sinks like use in some * high-res DP MST screens. */ struct idr tile_idr; struct mutex fb_lock; /* proctects global and per-file fb lists */ int num_fb; struct list_head fb_list; /** * @num_connector: Number of connectors on this device. */ int num_connector; /** * @connector_ida: ID allocator for connector indices. */ struct ida connector_ida; /** * @connector_list: List of connector objects. */ struct list_head connector_list; int num_encoder; struct list_head encoder_list; /* * Track # of overlay planes separately from # of total planes. By * default we only advertise overlay planes to userspace; if userspace * sets the "universal plane" capability bit, we'll go ahead and * expose all planes. */ int num_overlay_plane; int num_total_plane; struct list_head plane_list; int num_crtc; struct list_head crtc_list; struct list_head property_list; int min_width, min_height; int max_width, max_height; const struct drm_mode_config_funcs *funcs; resource_size_t fb_base; /* output poll support */ bool poll_enabled; bool poll_running; bool delayed_event; struct delayed_work output_poll_work; struct mutex blob_lock; /* pointers to standard properties */ struct list_head property_blob_list; /** * @edid_property: Default connector property to hold the EDID of the * currently connected sink, if any. */ struct drm_property *edid_property; /** * @dpms_property: Default connector property to control the * connector's DPMS state. */ struct drm_property *dpms_property; /** * @path_property: Default connector property to hold the DP MST path * for the port. */ struct drm_property *path_property; /** * @tile_property: Default connector property to store the tile * position of a tiled screen, for sinks which need to be driven with * multiple CRTCs. */ struct drm_property *tile_property; /** * @plane_type_property: Default plane property to differentiate * CURSOR, PRIMARY and OVERLAY legacy uses of planes. */ struct drm_property *plane_type_property; /** * @rotation_property: Optional property for planes or CRTCs to specifiy * rotation. */ struct drm_property *rotation_property; /** * @prop_src_x: Default atomic plane property for the plane source * position in the connected &drm_framebuffer. */ struct drm_property *prop_src_x; /** * @prop_src_y: Default atomic plane property for the plane source * position in the connected &drm_framebuffer. */ struct drm_property *prop_src_y; /** * @prop_src_w: Default atomic plane property for the plane source * position in the connected &drm_framebuffer. */ struct drm_property *prop_src_w; /** * @prop_src_h: Default atomic plane property for the plane source * position in the connected &drm_framebuffer. */ struct drm_property *prop_src_h; /** * @prop_crtc_x: Default atomic plane property for the plane destination * position in the &drm_crtc is is being shown on. */ struct drm_property *prop_crtc_x; /** * @prop_crtc_y: Default atomic plane property for the plane destination * position in the &drm_crtc is is being shown on. */ struct drm_property *prop_crtc_y; /** * @prop_crtc_w: Default atomic plane property for the plane destination * position in the &drm_crtc is is being shown on. */ struct drm_property *prop_crtc_w; /** * @prop_crtc_h: Default atomic plane property for the plane destination * position in the &drm_crtc is is being shown on. */ struct drm_property *prop_crtc_h; /** * @prop_fb_id: Default atomic plane property to specify the * &drm_framebuffer. */ struct drm_property *prop_fb_id; /** * @prop_crtc_id: Default atomic plane property to specify the * &drm_crtc. */ struct drm_property *prop_crtc_id; /** * @prop_active: Default atomic CRTC property to control the active * state, which is the simplified implementation for DPMS in atomic * drivers. */ struct drm_property *prop_active; /** * @prop_mode_id: Default atomic CRTC property to set the mode for a * CRTC. A 0 mode implies that the CRTC is entirely disabled - all * connectors must be of and active must be set to disabled, too. */ struct drm_property *prop_mode_id; /** * @dvi_i_subconnector_property: Optional DVI-I property to * differentiate between analog or digital mode. */ struct drm_property *dvi_i_subconnector_property; /** * @dvi_i_select_subconnector_property: Optional DVI-I property to * select between analog or digital mode. */ struct drm_property *dvi_i_select_subconnector_property; /** * @tv_subconnector_property: Optional TV property to differentiate * between different TV connector types. */ struct drm_property *tv_subconnector_property; /** * @tv_select_subconnector_property: Optional TV property to select * between different TV connector types. */ struct drm_property *tv_select_subconnector_property; /** * @tv_mode_property: Optional TV property to select * the output TV mode. */ struct drm_property *tv_mode_property; /** * @tv_left_margin_property: Optional TV property to set the left * margin. */ struct drm_property *tv_left_margin_property; /** * @tv_right_margin_property: Optional TV property to set the right * margin. */ struct drm_property *tv_right_margin_property; /** * @tv_top_margin_property: Optional TV property to set the right * margin. */ struct drm_property *tv_top_margin_property; /** * @tv_bottom_margin_property: Optional TV property to set the right * margin. */ struct drm_property *tv_bottom_margin_property; /** * @tv_brightness_property: Optional TV property to set the * brightness. */ struct drm_property *tv_brightness_property; /** * @tv_contrast_property: Optional TV property to set the * contrast. */ struct drm_property *tv_contrast_property; /** * @tv_flicker_reduction_property: Optional TV property to control the * flicker reduction mode. */ struct drm_property *tv_flicker_reduction_property; /** * @tv_overscan_property: Optional TV property to control the overscan * setting. */ struct drm_property *tv_overscan_property; /** * @tv_saturation_property: Optional TV property to set the * saturation. */ struct drm_property *tv_saturation_property; /** * @tv_hue_property: Optional TV property to set the hue. */ struct drm_property *tv_hue_property; /** * @scaling_mode_property: Optional connector property to control the * upscaling, mostly used for built-in panels. */ struct drm_property *scaling_mode_property; /** * @aspect_ratio_property: Optional connector property to control the * HDMI infoframe aspect ratio setting. */ struct drm_property *aspect_ratio_property; /** * @degamma_lut_property: Optional CRTC property to set the LUT used to * convert the framebuffer's colors to linear gamma. */ struct drm_property *degamma_lut_property; /** * @degamma_lut_size_property: Optional CRTC property for the size of * the degamma LUT as supported by the driver (read-only). */ struct drm_property *degamma_lut_size_property; /** * @ctm_property: Optional CRTC property to set the * matrix used to convert colors after the lookup in the * degamma LUT. */ struct drm_property *ctm_property; /** * @gamma_lut_property: Optional CRTC property to set the LUT used to * convert the colors, after the CTM matrix, to the gamma space of the * connected screen. */ struct drm_property *gamma_lut_property; /** * @gamma_lut_size_property: Optional CRTC property for the size of the * gamma LUT as supported by the driver (read-only). */ struct drm_property *gamma_lut_size_property; /** * @suggested_x_property: Optional connector property with a hint for * the position of the output on the host's screen. */ struct drm_property *suggested_x_property; /** * @suggested_y_property: Optional connector property with a hint for * the position of the output on the host's screen. */ struct drm_property *suggested_y_property; /* dumb ioctl parameters */ uint32_t preferred_depth, prefer_shadow; /** * @async_page_flip: Does this device support async flips on the primary * plane? */ bool async_page_flip; /** * @allow_fb_modifiers: * * Whether the driver supports fb modifiers in the ADDFB2.1 ioctl call. */ bool allow_fb_modifiers; /* cursor size */ uint32_t cursor_width, cursor_height; struct drm_mode_config_helper_funcs *helper_private; }; /** * drm_for_each_plane_mask - iterate over planes specified by bitmask * @plane: the loop cursor * @dev: the DRM device * @plane_mask: bitmask of plane indices * * Iterate over all planes specified by bitmask. */ #define drm_for_each_plane_mask(plane, dev, plane_mask) \ list_for_each_entry((plane), &(dev)->mode_config.plane_list, head) \ for_each_if ((plane_mask) & (1 << drm_plane_index(plane))) /** * drm_for_each_encoder_mask - iterate over encoders specified by bitmask * @encoder: the loop cursor * @dev: the DRM device * @encoder_mask: bitmask of encoder indices * * Iterate over all encoders specified by bitmask. */ #define drm_for_each_encoder_mask(encoder, dev, encoder_mask) \ list_for_each_entry((encoder), &(dev)->mode_config.encoder_list, head) \ for_each_if ((encoder_mask) & (1 << drm_encoder_index(encoder))) #define obj_to_crtc(x) container_of(x, struct drm_crtc, base) #define obj_to_encoder(x) container_of(x, struct drm_encoder, base) #define obj_to_mode(x) container_of(x, struct drm_display_mode, base) #define obj_to_fb(x) container_of(x, struct drm_framebuffer, base) #define obj_to_property(x) container_of(x, struct drm_property, base) #define obj_to_blob(x) container_of(x, struct drm_property_blob, base) #define obj_to_plane(x) container_of(x, struct drm_plane, base) struct drm_prop_enum_list { int type; char *name; }; extern __printf(6, 7) 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, ...); extern void drm_crtc_cleanup(struct drm_crtc *crtc); /** * drm_crtc_index - find the index of a registered CRTC * @crtc: CRTC to find index for * * Given a registered CRTC, return the index of that CRTC within a DRM * device's list of CRTCs. */ static inline unsigned int drm_crtc_index(struct drm_crtc *crtc) { return crtc->index; } /** * drm_crtc_mask - find the mask of a registered CRTC * @crtc: CRTC to find mask for * * Given a registered CRTC, return the mask bit of that CRTC for an * encoder's possible_crtcs field. */ static inline uint32_t drm_crtc_mask(struct drm_crtc *crtc) { return 1 << drm_crtc_index(crtc); } extern __printf(5, 6) int drm_encoder_init(struct drm_device *dev, struct drm_encoder *encoder, const struct drm_encoder_funcs *funcs, int encoder_type, const char *name, ...); /** * drm_encoder_index - find the index of a registered encoder * @encoder: encoder to find index for * * Given a registered encoder, return the index of that encoder within a DRM * device's list of encoders. */ static inline unsigned int drm_encoder_index(struct drm_encoder *encoder) { return encoder->index; } /** * drm_encoder_crtc_ok - can a given crtc drive a given encoder? * @encoder: encoder to test * @crtc: crtc to test * * Return false if @encoder can't be driven by @crtc, true otherwise. */ static inline bool drm_encoder_crtc_ok(struct drm_encoder *encoder, struct drm_crtc *crtc) { return !!(encoder->possible_crtcs & drm_crtc_mask(crtc)); } extern __printf(8, 9) 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, ...); extern 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); extern void drm_plane_cleanup(struct drm_plane *plane); /** * drm_plane_index - find the index of a registered plane * @plane: plane to find index for * * Given a registered plane, return the index of that plane within a DRM * device's list of planes. */ static inline unsigned int drm_plane_index(struct drm_plane *plane) { return plane->index; } extern struct drm_plane * drm_plane_from_index(struct drm_device *dev, int idx); extern void drm_plane_force_disable(struct drm_plane *plane); extern void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, int *hdisplay, int *vdisplay); extern int drm_crtc_force_disable(struct drm_crtc *crtc); extern int drm_crtc_force_disable_all(struct drm_device *dev); extern void drm_encoder_cleanup(struct drm_encoder *encoder); extern void drm_mode_config_init(struct drm_device *dev); extern void drm_mode_config_reset(struct drm_device *dev); extern void drm_mode_config_cleanup(struct drm_device *dev); static inline bool drm_property_type_is(struct drm_property *property, uint32_t type) { /* instanceof for props.. handles extended type vs original types: */ if (property->flags & DRM_MODE_PROP_EXTENDED_TYPE) return (property->flags & DRM_MODE_PROP_EXTENDED_TYPE) == type; return property->flags & type; } extern int drm_object_property_set_value(struct drm_mode_object *obj, struct drm_property *property, uint64_t val); extern int drm_object_property_get_value(struct drm_mode_object *obj, struct drm_property *property, uint64_t *value); extern void drm_object_attach_property(struct drm_mode_object *obj, struct drm_property *property, uint64_t init_val); extern struct drm_property *drm_property_create(struct drm_device *dev, int flags, const char *name, int num_values); extern 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 *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 *drm_property_create_range(struct drm_device *dev, int flags, const char *name, uint64_t min, uint64_t max); struct drm_property *drm_property_create_signed_range(struct drm_device *dev, int flags, const char *name, int64_t min, int64_t max); struct drm_property *drm_property_create_object(struct drm_device *dev, int flags, const char *name, uint32_t type); struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, const char *name); struct drm_property_blob *drm_property_create_blob(struct drm_device *dev, size_t length, const void *data); struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, uint32_t id); 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 *drm_property_reference_blob(struct drm_property_blob *blob); void drm_property_unreference_blob(struct drm_property_blob *blob); extern void drm_property_destroy(struct drm_device *dev, struct drm_property *property); extern int drm_property_add_enum(struct drm_property *property, int index, uint64_t value, const char *name); extern int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, int gamma_size); extern int drm_mode_set_config_internal(struct drm_mode_set *set); extern uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth); extern struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, char topology[8]); extern struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, char topology[8]); extern void drm_mode_put_tile_group(struct drm_device *dev, struct drm_tile_group *tg); extern int drm_mode_plane_set_obj_prop(struct drm_plane *plane, struct drm_property *property, uint64_t value); extern struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, unsigned int supported_rotations); extern unsigned int drm_rotation_simplify(unsigned int rotation, unsigned int supported_rotations); extern void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, uint degamma_lut_size, bool has_ctm, uint gamma_lut_size); int drm_plane_create_zpos_property(struct drm_plane *plane, unsigned int zpos, unsigned int min, unsigned int max); int drm_plane_create_zpos_immutable_property(struct drm_plane *plane, unsigned int zpos); /* Helpers */ static inline struct drm_plane *drm_plane_find(struct drm_device *dev, uint32_t id) { struct drm_mode_object *mo; mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_PLANE); return mo ? obj_to_plane(mo) : NULL; } static inline struct drm_crtc *drm_crtc_find(struct drm_device *dev, uint32_t id) { struct drm_mode_object *mo; mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_CRTC); return mo ? obj_to_crtc(mo) : NULL; } static inline struct drm_encoder *drm_encoder_find(struct drm_device *dev, uint32_t id) { struct drm_mode_object *mo; mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_ENCODER); return mo ? obj_to_encoder(mo) : NULL; } static inline struct drm_property *drm_property_find(struct drm_device *dev, uint32_t id) { struct drm_mode_object *mo; mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_PROPERTY); return mo ? obj_to_property(mo) : NULL; } /* * Extract a degamma/gamma LUT value provided by user and round it to the * precision supported by the hardware. */ static inline uint32_t drm_color_lut_extract(uint32_t user_input, uint32_t bit_precision) { uint32_t val = user_input; uint32_t max = 0xffff >> (16 - bit_precision); /* Round only if we're not using full precision. */ if (bit_precision < 16) { val += 1UL << (16 - bit_precision - 1); val >>= 16 - bit_precision; } return clamp_val(val, 0, max); } /* Plane list iterator for legacy (overlay only) planes. */ #define drm_for_each_legacy_plane(plane, dev) \ list_for_each_entry(plane, &(dev)->mode_config.plane_list, head) \ for_each_if (plane->type == DRM_PLANE_TYPE_OVERLAY) #define drm_for_each_plane(plane, dev) \ list_for_each_entry(plane, &(dev)->mode_config.plane_list, head) #define drm_for_each_crtc(crtc, dev) \ list_for_each_entry(crtc, &(dev)->mode_config.crtc_list, head) static inline void assert_drm_connector_list_read_locked(struct drm_mode_config *mode_config) { /* * The connector hotadd/remove code currently grabs both locks when * updating lists. Hence readers need only hold either of them to be * safe and the check amounts to * * WARN_ON(not_holding(A) && not_holding(B)). */ WARN_ON(!mutex_is_locked(&mode_config->mutex) && !drm_modeset_is_locked(&mode_config->connection_mutex)); } #define drm_for_each_connector(connector, dev) \ for (assert_drm_connector_list_read_locked(&(dev)->mode_config), \ connector = list_first_entry(&(dev)->mode_config.connector_list, \ struct drm_connector, head); \ &connector->head != (&(dev)->mode_config.connector_list); \ connector = list_next_entry(connector, head)) #define drm_for_each_encoder(encoder, dev) \ list_for_each_entry(encoder, &(dev)->mode_config.encoder_list, head) #define drm_for_each_fb(fb, dev) \ for (WARN_ON(!mutex_is_locked(&(dev)->mode_config.fb_lock)), \ fb = list_first_entry(&(dev)->mode_config.fb_list, \ struct drm_framebuffer, head); \ &fb->head != (&(dev)->mode_config.fb_list); \ fb = list_next_entry(fb, head)) /* drm_edid.c */ bool drm_probe_ddc(struct i2c_adapter *adapter); struct edid *drm_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter); struct edid *drm_get_edid_switcheroo(struct drm_connector *connector, struct i2c_adapter *adapter); struct edid *drm_edid_duplicate(const struct edid *edid); int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid); u8 drm_match_cea_mode(const struct drm_display_mode *to_match); enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code); bool drm_detect_hdmi_monitor(struct edid *edid); bool drm_detect_monitor_audio(struct edid *edid); bool drm_rgb_quant_range_selectable(struct edid *edid); int drm_add_modes_noedid(struct drm_connector *connector, int hdisplay, int vdisplay); void drm_set_preferred_mode(struct drm_connector *connector, int hpref, int vpref); int drm_edid_header_is_valid(const u8 *raw_edid); bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid, bool *edid_corrupt); bool drm_edid_is_valid(struct edid *edid); void drm_edid_get_monitor_name(struct edid *edid, char *name, int buflen); struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev, int hsize, int vsize, int fresh, bool rb); /* drm_bridge.c */ extern int drm_bridge_add(struct drm_bridge *bridge); extern void drm_bridge_remove(struct drm_bridge *bridge); extern struct drm_bridge *of_drm_find_bridge(struct device_node *np); extern int drm_bridge_attach(struct drm_device *dev, struct drm_bridge *bridge); extern void drm_bridge_detach(struct drm_bridge *bridge); bool drm_bridge_mode_fixup(struct drm_bridge *bridge, const struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode); void drm_bridge_disable(struct drm_bridge *bridge); void drm_bridge_post_disable(struct drm_bridge *bridge); void drm_bridge_mode_set(struct drm_bridge *bridge, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode); void drm_bridge_pre_enable(struct drm_bridge *bridge); void drm_bridge_enable(struct drm_bridge *bridge); #endif /* __DRM_CRTC_H__ */