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drm/atomic: Add target_vblank support in atomic helpers (v2)
Allows usage of the new page_flip_target hook for drivers implementing the atomic path. Provides default atomic helper for the new hook. v2: Update code sharing logic between exsiting and the new flip hooks. Improve kerneldoc. Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1483735180-4173-1-git-send-email-Andrey.Grodzovsky@amd.com
This commit is contained in:
Andrey Grodzovsky
Daniel Vetter
parent
fd056f05b9
commit
f869a6ecf2
@ -2706,6 +2706,44 @@ backoff:
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}
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EXPORT_SYMBOL(drm_atomic_helper_connector_set_property);
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static int page_flip_common(
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struct drm_atomic_state *state,
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struct drm_crtc *crtc,
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struct drm_framebuffer *fb,
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struct drm_pending_vblank_event *event)
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{
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struct drm_plane *plane = crtc->primary;
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struct drm_plane_state *plane_state;
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struct drm_crtc_state *crtc_state;
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int ret = 0;
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crtc_state = drm_atomic_get_crtc_state(state, crtc);
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if (IS_ERR(crtc_state))
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return PTR_ERR(crtc_state);
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crtc_state->event = event;
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plane_state = drm_atomic_get_plane_state(state, plane);
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if (IS_ERR(plane_state))
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return PTR_ERR(plane_state);
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ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
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if (ret != 0)
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return ret;
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drm_atomic_set_fb_for_plane(plane_state, fb);
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/* Make sure we don't accidentally do a full modeset. */
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state->allow_modeset = false;
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if (!crtc_state->active) {
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DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n",
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crtc->base.id);
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return -EINVAL;
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}
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return ret;
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}
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/**
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* drm_atomic_helper_page_flip - execute a legacy page flip
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* @crtc: DRM crtc
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@ -2713,7 +2751,8 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_set_property);
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* @event: optional DRM event to signal upon completion
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* @flags: flip flags for non-vblank sync'ed updates
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*
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* Provides a default page flip implementation using the atomic driver interface.
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* Provides a default &drm_crtc_funcs.page_flip implementation
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* using the atomic driver interface.
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*
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* Note that for now so called async page flips (i.e. updates which are not
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* synchronized to vblank) are not supported, since the atomic interfaces have
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@ -2721,6 +2760,9 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_set_property);
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*
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* Returns:
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* Returns 0 on success, negative errno numbers on failure.
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*
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* See also:
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* drm_atomic_helper_page_flip_target()
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*/
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int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
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struct drm_framebuffer *fb,
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@ -2729,8 +2771,6 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
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{
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struct drm_plane *plane = crtc->primary;
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struct drm_atomic_state *state;
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struct drm_plane_state *plane_state;
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struct drm_crtc_state *crtc_state;
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int ret = 0;
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if (flags & DRM_MODE_PAGE_FLIP_ASYNC)
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@ -2741,35 +2781,14 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
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return -ENOMEM;
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state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
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retry:
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crtc_state = drm_atomic_get_crtc_state(state, crtc);
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if (IS_ERR(crtc_state)) {
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ret = PTR_ERR(crtc_state);
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goto fail;
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}
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crtc_state->event = event;
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plane_state = drm_atomic_get_plane_state(state, plane);
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if (IS_ERR(plane_state)) {
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ret = PTR_ERR(plane_state);
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goto fail;
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}
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ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
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ret = page_flip_common(state, crtc, fb, event);
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if (ret != 0)
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goto fail;
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drm_atomic_set_fb_for_plane(plane_state, fb);
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/* Make sure we don't accidentally do a full modeset. */
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state->allow_modeset = false;
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if (!crtc_state->active) {
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DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n",
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crtc->base.id);
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ret = -EINVAL;
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goto fail;
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}
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ret = drm_atomic_nonblocking_commit(state);
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fail:
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if (ret == -EDEADLK)
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goto backoff;
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@ -2792,6 +2811,78 @@ backoff:
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}
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EXPORT_SYMBOL(drm_atomic_helper_page_flip);
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/**
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* drm_atomic_helper_page_flip_target - do page flip on target vblank period.
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* @crtc: DRM crtc
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* @fb: DRM framebuffer
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* @event: optional DRM event to signal upon completion
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* @flags: flip flags for non-vblank sync'ed updates
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* @target: specifying the target vblank period when the flip to take effect
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*
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* Provides a default &drm_crtc_funcs.page_flip_target implementation.
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* Similar to drm_atomic_helper_page_flip() with extra parameter to specify
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* target vblank period to flip.
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*
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* Returns:
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* Returns 0 on success, negative errno numbers on failure.
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*/
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int drm_atomic_helper_page_flip_target(
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struct drm_crtc *crtc,
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struct drm_framebuffer *fb,
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struct drm_pending_vblank_event *event,
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uint32_t flags,
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uint32_t target)
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{
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struct drm_plane *plane = crtc->primary;
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struct drm_atomic_state *state;
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struct drm_crtc_state *crtc_state;
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int ret = 0;
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if (flags & DRM_MODE_PAGE_FLIP_ASYNC)
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return -EINVAL;
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state = drm_atomic_state_alloc(plane->dev);
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if (!state)
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return -ENOMEM;
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state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
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retry:
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ret = page_flip_common(state, crtc, fb, event);
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if (ret != 0)
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goto fail;
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crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
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if (WARN_ON(!crtc_state)) {
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ret = -EINVAL;
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goto fail;
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}
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crtc_state->target_vblank = target;
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ret = drm_atomic_nonblocking_commit(state);
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fail:
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if (ret == -EDEADLK)
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goto backoff;
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drm_atomic_state_put(state);
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return ret;
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backoff:
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drm_atomic_state_clear(state);
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drm_atomic_legacy_backoff(state);
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/*
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* Someone might have exchanged the framebuffer while we dropped locks
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* in the backoff code. We need to fix up the fb refcount tracking the
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* core does for us.
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*/
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plane->old_fb = plane->fb;
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goto retry;
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}
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EXPORT_SYMBOL(drm_atomic_helper_page_flip_target);
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/**
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* drm_atomic_helper_connector_dpms() - connector dpms helper implementation
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* @connector: affected connector
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@ -121,6 +121,12 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
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struct drm_framebuffer *fb,
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struct drm_pending_vblank_event *event,
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uint32_t flags);
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int drm_atomic_helper_page_flip_target(
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struct drm_crtc *crtc,
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struct drm_framebuffer *fb,
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struct drm_pending_vblank_event *event,
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uint32_t flags,
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uint32_t target);
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int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
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int mode);
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struct drm_encoder *
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@ -148,6 +148,15 @@ struct drm_crtc_state {
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struct drm_property_blob *ctm;
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struct drm_property_blob *gamma_lut;
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/**
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* @target_vblank:
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*
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* Target vertical blank period when a page flip
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* should take effect.
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*/
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u32 target_vblank;
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/**
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* @event:
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*
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