/* * drivers/gpu/drm/omapdrm/omap_crtc.c * * Copyright (C) 2011 Texas Instruments * Author: Rob Clark * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program. If not, see . */ #include #include #include #include #include #include #include #include "omap_drv.h" #define to_omap_crtc(x) container_of(x, struct omap_crtc, base) struct omap_crtc { struct drm_crtc base; const char *name; enum omap_channel channel; /* * Temporary: eventually this will go away, but it is needed * for now to keep the output's happy. (They only need * mgr->id.) Eventually this will be replaced w/ something * more common-panel-framework-y */ struct omap_overlay_manager *mgr; struct omap_video_timings timings; struct omap_drm_irq vblank_irq; struct omap_drm_irq error_irq; /* pending event */ struct drm_pending_vblank_event *event; wait_queue_head_t flip_wait; struct completion completion; bool ignore_digit_sync_lost; }; /* ----------------------------------------------------------------------------- * Helper Functions */ uint32_t pipe2vbl(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); return dispc_mgr_get_vsync_irq(omap_crtc->channel); } struct omap_video_timings *omap_crtc_timings(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); return &omap_crtc->timings; } enum omap_channel omap_crtc_channel(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); return omap_crtc->channel; } /* ----------------------------------------------------------------------------- * DSS Manager Functions */ /* * Manager-ops, callbacks from output when they need to configure * the upstream part of the video pipe. * * Most of these we can ignore until we add support for command-mode * panels.. for video-mode the crtc-helpers already do an adequate * job of sequencing the setup of the video pipe in the proper order */ /* ovl-mgr-id -> crtc */ static struct omap_crtc *omap_crtcs[8]; /* we can probably ignore these until we support command-mode panels: */ static int omap_crtc_dss_connect(struct omap_overlay_manager *mgr, struct omap_dss_device *dst) { if (mgr->output) return -EINVAL; if ((mgr->supported_outputs & dst->id) == 0) return -EINVAL; dst->manager = mgr; mgr->output = dst; return 0; } static void omap_crtc_dss_disconnect(struct omap_overlay_manager *mgr, struct omap_dss_device *dst) { mgr->output->manager = NULL; mgr->output = NULL; } static void omap_crtc_dss_start_update(struct omap_overlay_manager *mgr) { } /* Called only from the encoder enable/disable and suspend/resume handlers. */ static void omap_crtc_set_enabled(struct drm_crtc *crtc, bool enable) { struct drm_device *dev = crtc->dev; struct omap_crtc *omap_crtc = to_omap_crtc(crtc); enum omap_channel channel = omap_crtc->channel; struct omap_irq_wait *wait; u32 framedone_irq, vsync_irq; int ret; if (dispc_mgr_is_enabled(channel) == enable) return; if (omap_crtc->channel == OMAP_DSS_CHANNEL_DIGIT) { /* * Digit output produces some sync lost interrupts during the * first frame when enabling, so we need to ignore those. */ omap_crtc->ignore_digit_sync_lost = true; } framedone_irq = dispc_mgr_get_framedone_irq(channel); vsync_irq = dispc_mgr_get_vsync_irq(channel); if (enable) { wait = omap_irq_wait_init(dev, vsync_irq, 1); } else { /* * When we disable the digit output, we need to wait for * FRAMEDONE to know that DISPC has finished with the output. * * OMAP2/3 does not have FRAMEDONE irq for digit output, and in * that case we need to use vsync interrupt, and wait for both * even and odd frames. */ if (framedone_irq) wait = omap_irq_wait_init(dev, framedone_irq, 1); else wait = omap_irq_wait_init(dev, vsync_irq, 2); } dispc_mgr_enable(channel, enable); ret = omap_irq_wait(dev, wait, msecs_to_jiffies(100)); if (ret) { dev_err(dev->dev, "%s: timeout waiting for %s\n", omap_crtc->name, enable ? "enable" : "disable"); } if (omap_crtc->channel == OMAP_DSS_CHANNEL_DIGIT) { omap_crtc->ignore_digit_sync_lost = false; /* make sure the irq handler sees the value above */ mb(); } } static int omap_crtc_dss_enable(struct omap_overlay_manager *mgr) { struct omap_crtc *omap_crtc = omap_crtcs[mgr->id]; struct omap_overlay_manager_info info; memset(&info, 0, sizeof(info)); info.default_color = 0x00000000; info.trans_key = 0x00000000; info.trans_key_type = OMAP_DSS_COLOR_KEY_GFX_DST; info.trans_enabled = false; dispc_mgr_setup(omap_crtc->channel, &info); dispc_mgr_set_timings(omap_crtc->channel, &omap_crtc->timings); omap_crtc_set_enabled(&omap_crtc->base, true); return 0; } static void omap_crtc_dss_disable(struct omap_overlay_manager *mgr) { struct omap_crtc *omap_crtc = omap_crtcs[mgr->id]; omap_crtc_set_enabled(&omap_crtc->base, false); } static void omap_crtc_dss_set_timings(struct omap_overlay_manager *mgr, const struct omap_video_timings *timings) { struct omap_crtc *omap_crtc = omap_crtcs[mgr->id]; DBG("%s", omap_crtc->name); omap_crtc->timings = *timings; } static void omap_crtc_dss_set_lcd_config(struct omap_overlay_manager *mgr, const struct dss_lcd_mgr_config *config) { struct omap_crtc *omap_crtc = omap_crtcs[mgr->id]; DBG("%s", omap_crtc->name); dispc_mgr_set_lcd_config(omap_crtc->channel, config); } static int omap_crtc_dss_register_framedone( struct omap_overlay_manager *mgr, void (*handler)(void *), void *data) { return 0; } static void omap_crtc_dss_unregister_framedone( struct omap_overlay_manager *mgr, void (*handler)(void *), void *data) { } static const struct dss_mgr_ops mgr_ops = { .connect = omap_crtc_dss_connect, .disconnect = omap_crtc_dss_disconnect, .start_update = omap_crtc_dss_start_update, .enable = omap_crtc_dss_enable, .disable = omap_crtc_dss_disable, .set_timings = omap_crtc_dss_set_timings, .set_lcd_config = omap_crtc_dss_set_lcd_config, .register_framedone_handler = omap_crtc_dss_register_framedone, .unregister_framedone_handler = omap_crtc_dss_unregister_framedone, }; /* ----------------------------------------------------------------------------- * Setup, Flush and Page Flip */ static void omap_crtc_complete_page_flip(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); struct drm_pending_vblank_event *event; struct drm_device *dev = crtc->dev; unsigned long flags; spin_lock_irqsave(&dev->event_lock, flags); event = omap_crtc->event; omap_crtc->event = NULL; if (event) { list_del(&event->base.link); /* * Queue the event for delivery if it's still linked to a file * handle, otherwise just destroy it. */ if (event->base.file_priv) drm_crtc_send_vblank_event(crtc, event); else event->base.destroy(&event->base); wake_up(&omap_crtc->flip_wait); drm_crtc_vblank_put(crtc); } spin_unlock_irqrestore(&dev->event_lock, flags); } static bool omap_crtc_page_flip_pending(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); struct drm_device *dev = crtc->dev; unsigned long flags; bool pending; spin_lock_irqsave(&dev->event_lock, flags); pending = omap_crtc->event != NULL; spin_unlock_irqrestore(&dev->event_lock, flags); return pending; } static void omap_crtc_wait_page_flip(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); if (wait_event_timeout(omap_crtc->flip_wait, !omap_crtc_page_flip_pending(crtc), msecs_to_jiffies(50))) return; dev_warn(crtc->dev->dev, "page flip timeout!\n"); omap_crtc_complete_page_flip(crtc); } static void omap_crtc_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus) { struct omap_crtc *omap_crtc = container_of(irq, struct omap_crtc, error_irq); if (omap_crtc->ignore_digit_sync_lost) { irqstatus &= ~DISPC_IRQ_SYNC_LOST_DIGIT; if (!irqstatus) return; } DRM_ERROR_RATELIMITED("%s: errors: %08x\n", omap_crtc->name, irqstatus); } static void omap_crtc_vblank_irq(struct omap_drm_irq *irq, uint32_t irqstatus) { struct omap_crtc *omap_crtc = container_of(irq, struct omap_crtc, vblank_irq); struct drm_device *dev = omap_crtc->base.dev; if (dispc_mgr_go_busy(omap_crtc->channel)) return; DBG("%s: apply done", omap_crtc->name); __omap_irq_unregister(dev, &omap_crtc->vblank_irq); /* wakeup userspace */ omap_crtc_complete_page_flip(&omap_crtc->base); complete(&omap_crtc->completion); } static int omap_crtc_flush(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); DBG("%s: GO", omap_crtc->name); WARN_ON(omap_crtc->vblank_irq.registered); if (dispc_mgr_is_enabled(omap_crtc->channel)) { dispc_mgr_go(omap_crtc->channel); omap_irq_register(crtc->dev, &omap_crtc->vblank_irq); WARN_ON(!wait_for_completion_timeout(&omap_crtc->completion, msecs_to_jiffies(100))); reinit_completion(&omap_crtc->completion); } return 0; } /* ----------------------------------------------------------------------------- * CRTC Functions */ static void omap_crtc_destroy(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); DBG("%s", omap_crtc->name); WARN_ON(omap_crtc->vblank_irq.registered); omap_irq_unregister(crtc->dev, &omap_crtc->error_irq); drm_crtc_cleanup(crtc); kfree(omap_crtc); } static bool omap_crtc_mode_fixup(struct drm_crtc *crtc, const struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { return true; } static void omap_crtc_enable(struct drm_crtc *crtc) { struct omap_drm_private *priv = crtc->dev->dev_private; struct omap_crtc *omap_crtc = to_omap_crtc(crtc); unsigned int i; DBG("%s", omap_crtc->name); /* Enable all planes associated with the CRTC. */ for (i = 0; i < priv->num_planes; i++) { struct drm_plane *plane = priv->planes[i]; if (plane->crtc == crtc) WARN_ON(omap_plane_setup(plane)); } drm_crtc_vblank_on(crtc); } static void omap_crtc_disable(struct drm_crtc *crtc) { struct omap_drm_private *priv = crtc->dev->dev_private; struct omap_crtc *omap_crtc = to_omap_crtc(crtc); unsigned int i; DBG("%s", omap_crtc->name); omap_crtc_wait_page_flip(crtc); drm_crtc_vblank_off(crtc); /* Disable all planes associated with the CRTC. */ for (i = 0; i < priv->num_planes; i++) { struct drm_plane *plane = priv->planes[i]; if (plane->crtc == crtc) WARN_ON(omap_plane_setup(plane)); } } static void omap_crtc_mode_set_nofb(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); struct drm_display_mode *mode = &crtc->state->adjusted_mode; DBG("%s: set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x", omap_crtc->name, mode->base.id, mode->name, mode->vrefresh, mode->clock, mode->hdisplay, mode->hsync_start, mode->hsync_end, mode->htotal, mode->vdisplay, mode->vsync_start, mode->vsync_end, mode->vtotal, mode->type, mode->flags); copy_timings_drm_to_omap(&omap_crtc->timings, mode); } static void omap_crtc_atomic_begin(struct drm_crtc *crtc) { struct drm_pending_vblank_event *event = crtc->state->event; struct omap_crtc *omap_crtc = to_omap_crtc(crtc); struct drm_device *dev = crtc->dev; unsigned long flags; if (event) { WARN_ON(omap_crtc->event); WARN_ON(drm_crtc_vblank_get(crtc) != 0); spin_lock_irqsave(&dev->event_lock, flags); omap_crtc->event = event; spin_unlock_irqrestore(&dev->event_lock, flags); } } static void omap_crtc_atomic_flush(struct drm_crtc *crtc) { omap_crtc_flush(crtc); crtc->invert_dimensions = !!(crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))); } static int omap_crtc_atomic_set_property(struct drm_crtc *crtc, struct drm_crtc_state *state, struct drm_property *property, uint64_t val) { struct drm_plane_state *plane_state; struct drm_plane *plane = crtc->primary; /* * Delegate property set to the primary plane. Get the plane state and * set the property directly. */ plane_state = drm_atomic_get_plane_state(state->state, plane); if (!plane_state) return -EINVAL; return drm_atomic_plane_set_property(plane, plane_state, property, val); } static int omap_crtc_atomic_get_property(struct drm_crtc *crtc, const struct drm_crtc_state *state, struct drm_property *property, uint64_t *val) { /* * Delegate property get to the primary plane. The * drm_atomic_plane_get_property() function isn't exported, but can be * called through drm_object_property_get_value() as that will call * drm_atomic_get_property() for atomic drivers. */ return drm_object_property_get_value(&crtc->primary->base, property, val); } static const struct drm_crtc_funcs omap_crtc_funcs = { .reset = drm_atomic_helper_crtc_reset, .set_config = drm_atomic_helper_set_config, .destroy = omap_crtc_destroy, .page_flip = drm_atomic_helper_page_flip, .set_property = drm_atomic_helper_crtc_set_property, .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, .atomic_set_property = omap_crtc_atomic_set_property, .atomic_get_property = omap_crtc_atomic_get_property, }; static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs = { .mode_fixup = omap_crtc_mode_fixup, .mode_set_nofb = omap_crtc_mode_set_nofb, .disable = omap_crtc_disable, .enable = omap_crtc_enable, .atomic_begin = omap_crtc_atomic_begin, .atomic_flush = omap_crtc_atomic_flush, }; /* ----------------------------------------------------------------------------- * Init and Cleanup */ static const char *channel_names[] = { [OMAP_DSS_CHANNEL_LCD] = "lcd", [OMAP_DSS_CHANNEL_DIGIT] = "tv", [OMAP_DSS_CHANNEL_LCD2] = "lcd2", [OMAP_DSS_CHANNEL_LCD3] = "lcd3", }; void omap_crtc_pre_init(void) { dss_install_mgr_ops(&mgr_ops); } void omap_crtc_pre_uninit(void) { dss_uninstall_mgr_ops(); } /* initialize crtc */ struct drm_crtc *omap_crtc_init(struct drm_device *dev, struct drm_plane *plane, enum omap_channel channel, int id) { struct drm_crtc *crtc = NULL; struct omap_crtc *omap_crtc; int ret; DBG("%s", channel_names[channel]); omap_crtc = kzalloc(sizeof(*omap_crtc), GFP_KERNEL); if (!omap_crtc) return NULL; crtc = &omap_crtc->base; init_waitqueue_head(&omap_crtc->flip_wait); init_completion(&omap_crtc->completion); omap_crtc->channel = channel; omap_crtc->name = channel_names[channel]; omap_crtc->vblank_irq.irqmask = pipe2vbl(crtc); omap_crtc->vblank_irq.irq = omap_crtc_vblank_irq; omap_crtc->error_irq.irqmask = dispc_mgr_get_sync_lost_irq(channel); omap_crtc->error_irq.irq = omap_crtc_error_irq; omap_irq_register(dev, &omap_crtc->error_irq); /* temporary: */ omap_crtc->mgr = omap_dss_get_overlay_manager(channel); ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL, &omap_crtc_funcs); if (ret < 0) { kfree(omap_crtc); return NULL; } drm_crtc_helper_add(crtc, &omap_crtc_helper_funcs); omap_plane_install_properties(crtc->primary, &crtc->base); omap_crtcs[channel] = omap_crtc; return crtc; }