diff options
4 files changed, 103 insertions, 30 deletions
diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c index 0b763ea543ac..2060cd4cd96b 100644 --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c @@ -395,6 +395,22 @@ static int d71_enum_resources(struct komeda_dev *mdev) err = PTR_ERR(pipe); goto err_cleanup; } + + /* D71 HW doesn't update shadow registers when display output + * is turning off, so when we disable all pipeline components + * together with display output disable by one flush or one + * operation, the disable operation updated registers will not + * be flush to or valid in HW, which may leads problem. + * To workaround this problem, introduce a two phase disable. + * Phase1: Disabling components with display is on to make sure + * the disable can be flushed to HW. + * Phase2: Only turn-off display output. + */ + value = KOMEDA_PIPELINE_IMPROCS | + BIT(KOMEDA_COMPONENT_TIMING_CTRLR); + + pipe->standalone_disabled_comps = value; + d71->pipes[i] = to_d71_pipeline(pipe); } diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c index 4f66b0e205eb..9ca5dbfd0723 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c @@ -253,19 +253,52 @@ komeda_crtc_atomic_enable(struct drm_crtc *crtc, } static void +komeda_crtc_flush_and_wait_for_flip_done(struct komeda_crtc *kcrtc, + struct completion *input_flip_done) +{ + struct drm_device *drm = kcrtc->base.dev; + struct komeda_dev *mdev = kcrtc->master->mdev; + struct completion *flip_done; + struct completion temp; + int timeout; + + /* if caller doesn't send a flip_done, use a private flip_done */ + if (input_flip_done) { + flip_done = input_flip_done; + } else { + init_completion(&temp); + kcrtc->disable_done = &temp; + flip_done = &temp; + } + + mdev->funcs->flush(mdev, kcrtc->master->id, 0); + + /* wait the flip take affect.*/ + timeout = wait_for_completion_timeout(flip_done, HZ); + if (timeout == 0) { + DRM_ERROR("wait pipe%d flip done timeout\n", kcrtc->master->id); + if (!input_flip_done) { + unsigned long flags; + + spin_lock_irqsave(&drm->event_lock, flags); + kcrtc->disable_done = NULL; + spin_unlock_irqrestore(&drm->event_lock, flags); + } + } +} + +static void komeda_crtc_atomic_disable(struct drm_crtc *crtc, struct drm_crtc_state *old) { struct komeda_crtc *kcrtc = to_kcrtc(crtc); struct komeda_crtc_state *old_st = to_kcrtc_st(old); - struct komeda_dev *mdev = crtc->dev->dev_private; struct komeda_pipeline *master = kcrtc->master; struct komeda_pipeline *slave = kcrtc->slave; struct completion *disable_done = &crtc->state->commit->flip_done; - struct completion temp; - int timeout; + bool needs_phase2 = false; - DRM_DEBUG_ATOMIC("CRTC%d_DISABLE: active_pipes: 0x%x, affected: 0x%x.\n", + DRM_DEBUG_ATOMIC("CRTC%d_DISABLE: active_pipes: 0x%x, affected: 0x%x\n", drm_crtc_index(crtc), old_st->active_pipes, old_st->affected_pipes); @@ -273,7 +306,7 @@ komeda_crtc_atomic_disable(struct drm_crtc *crtc, komeda_pipeline_disable(slave, old->state); if (has_bit(master->id, old_st->active_pipes)) - komeda_pipeline_disable(master, old->state); + needs_phase2 = komeda_pipeline_disable(master, old->state); /* crtc_disable has two scenarios according to the state->active switch. * 1. active -> inactive @@ -292,30 +325,20 @@ komeda_crtc_atomic_disable(struct drm_crtc *crtc, * That's also the reason why skip modeset commit in * komeda_crtc_atomic_flush() */ - if (crtc->state->active) { - struct komeda_pipeline_state *pipe_st; - /* clear the old active_comps to zero */ - pipe_st = komeda_pipeline_get_old_state(master, old->state); - pipe_st->active_comps = 0; + disable_done = (needs_phase2 || crtc->state->active) ? + NULL : &crtc->state->commit->flip_done; - init_completion(&temp); - kcrtc->disable_done = &temp; - disable_done = &temp; - } + /* wait phase 1 disable done */ + komeda_crtc_flush_and_wait_for_flip_done(kcrtc, disable_done); - mdev->funcs->flush(mdev, master->id, 0); + /* phase 2 */ + if (needs_phase2) { + komeda_pipeline_disable(kcrtc->master, old->state); - /* wait the disable take affect.*/ - timeout = wait_for_completion_timeout(disable_done, HZ); - if (timeout == 0) { - DRM_ERROR("disable pipeline%d timeout.\n", kcrtc->master->id); - if (crtc->state->active) { - unsigned long flags; + disable_done = crtc->state->active ? + NULL : &crtc->state->commit->flip_done; - spin_lock_irqsave(&crtc->dev->event_lock, flags); - kcrtc->disable_done = NULL; - spin_unlock_irqrestore(&crtc->dev->event_lock, flags); - } + komeda_crtc_flush_and_wait_for_flip_done(kcrtc, disable_done); } drm_crtc_vblank_off(crtc); diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h index a7a84e66549d..8401cc0cdfe7 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h @@ -389,6 +389,18 @@ struct komeda_pipeline { int id; /** @avail_comps: available components mask of pipeline */ u32 avail_comps; + /** + * @standalone_disabled_comps: + * + * When disable the pipeline, some components can not be disabled + * together with others, but need a sparated and standalone disable. + * The standalone_disabled_comps are the components which need to be + * disabled standalone, and this concept also introduce concept of + * two phase. + * phase 1: for disabling the common components. + * phase 2: for disabling the standalong_disabled_comps. + */ + u32 standalone_disabled_comps; /** @n_layers: the number of layer on @layers */ int n_layers; /** @layers: the pipeline layers */ @@ -534,7 +546,7 @@ int komeda_release_unclaimed_resources(struct komeda_pipeline *pipe, struct komeda_pipeline_state * komeda_pipeline_get_old_state(struct komeda_pipeline *pipe, struct drm_atomic_state *state); -void komeda_pipeline_disable(struct komeda_pipeline *pipe, +bool komeda_pipeline_disable(struct komeda_pipeline *pipe, struct drm_atomic_state *old_state); void komeda_pipeline_update(struct komeda_pipeline *pipe, struct drm_atomic_state *old_state); diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c index ea26bc9c2d00..0ba9c6aa3708 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c @@ -1218,7 +1218,17 @@ int komeda_release_unclaimed_resources(struct komeda_pipeline *pipe, return 0; } -void komeda_pipeline_disable(struct komeda_pipeline *pipe, +/* Since standalong disabled components must be disabled separately and in the + * last, So a complete disable operation may needs to call pipeline_disable + * twice (two phase disabling). + * Phase 1: disable the common components, flush it. + * Phase 2: disable the standalone disabled components, flush it. + * + * RETURNS: + * true: disable is not complete, needs a phase 2 disable. + * false: disable is complete. + */ +bool komeda_pipeline_disable(struct komeda_pipeline *pipe, struct drm_atomic_state *old_state) { struct komeda_pipeline_state *old; @@ -1228,9 +1238,14 @@ void komeda_pipeline_disable(struct komeda_pipeline *pipe, old = komeda_pipeline_get_old_state(pipe, old_state); - disabling_comps = old->active_comps; - DRM_DEBUG_ATOMIC("PIPE%d: disabling_comps: 0x%x.\n", - pipe->id, disabling_comps); + disabling_comps = old->active_comps & + (~pipe->standalone_disabled_comps); + if (!disabling_comps) + disabling_comps = old->active_comps & + pipe->standalone_disabled_comps; + + DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, disabling_comps: 0x%x.\n", + pipe->id, old->active_comps, disabling_comps); dp_for_each_set_bit(id, disabling_comps) { c = komeda_pipeline_get_component(pipe, id); @@ -1248,6 +1263,13 @@ void komeda_pipeline_disable(struct komeda_pipeline *pipe, c->funcs->disable(c); } + + /* Update the pipeline state, if there are components that are still + * active, return true for calling the phase 2 disable. + */ + old->active_comps &= ~disabling_comps; + + return old->active_comps ? true : false; } void komeda_pipeline_update(struct komeda_pipeline *pipe, |