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- /*
- * drivers/gpu/drm/omapdrm/omap_crtc.c
- *
- * Copyright (C) 2011 Texas Instruments
- * Author: Rob Clark <rob@ti.com>
- *
- * 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 <http://www.gnu.org/licenses/>.
- */
- #include <drm/drm_atomic.h>
- #include <drm/drm_atomic_helper.h>
- #include <drm/drm_crtc.h>
- #include <drm/drm_crtc_helper.h>
- #include <drm/drm_mode.h>
- #include <drm/drm_plane_helper.h>
- #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;
- bool ignore_digit_sync_lost;
- bool pending;
- wait_queue_head_t pending_wait;
- };
- /* -----------------------------------------------------------------------------
- * 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;
- }
- int omap_crtc_wait_pending(struct drm_crtc *crtc)
- {
- struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
- return wait_event_timeout(omap_crtc->pending_wait,
- !omap_crtc->pending,
- msecs_to_jiffies(50));
- }
- /* -----------------------------------------------------------------------------
- * 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 drm_pending_vblank_event *event;
- struct drm_device *dev = crtc->dev;
- unsigned long flags;
- event = crtc->state->event;
- if (!event)
- return;
- spin_lock_irqsave(&dev->event_lock, flags);
- 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);
- spin_unlock_irqrestore(&dev->event_lock, flags);
- }
- 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);
- rmb();
- WARN_ON(!omap_crtc->pending);
- omap_crtc->pending = false;
- wmb();
- /* wake up userspace */
- omap_crtc_complete_page_flip(&omap_crtc->base);
- /* wake up omap_atomic_complete */
- wake_up(&omap_crtc->pending_wait);
- }
- /* -----------------------------------------------------------------------------
- * 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_crtc *omap_crtc = to_omap_crtc(crtc);
- DBG("%s", omap_crtc->name);
- rmb();
- WARN_ON(omap_crtc->pending);
- omap_crtc->pending = true;
- wmb();
- omap_irq_register(crtc->dev, &omap_crtc->vblank_irq);
- drm_crtc_vblank_on(crtc);
- }
- static void omap_crtc_disable(struct drm_crtc *crtc)
- {
- struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
- DBG("%s", omap_crtc->name);
- drm_crtc_vblank_off(crtc);
- }
- 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_crtc_state *old_crtc_state)
- {
- }
- static void omap_crtc_atomic_flush(struct drm_crtc *crtc,
- struct drm_crtc_state *old_crtc_state)
- {
- struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
- WARN_ON(omap_crtc->vblank_irq.registered);
- if (dispc_mgr_is_enabled(omap_crtc->channel)) {
- DBG("%s: GO", omap_crtc->name);
- rmb();
- WARN_ON(omap_crtc->pending);
- omap_crtc->pending = true;
- wmb();
- dispc_mgr_go(omap_crtc->channel);
- omap_irq_register(crtc->dev, &omap_crtc->vblank_irq);
- }
- }
- 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->pending_wait);
- 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;
- }
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