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authorAndrey Grodzovsky <Andrey.Grodzovsky@amd.com>2017-01-06 21:39:40 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-12 08:57:57 +0100
commitf869a6ecf254194d96f82c71f528a2bcc048d44b (patch)
tree7e7b71188a03f3b2d70de0604bf0f79068171fdc
parentdrm: add fourcc codes for 16bit R and RG (diff)
downloadlinux-f869a6ecf254194d96f82c71f528a2bcc048d44b.tar.xz
linux-f869a6ecf254194d96f82c71f528a2bcc048d44b.zip
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
-rw-r--r--drivers/gpu/drm/drm_atomic_helper.c133
-rw-r--r--include/drm/drm_atomic_helper.h6
-rw-r--r--include/drm/drm_crtc.h9
3 files changed, 127 insertions, 21 deletions
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 9460f3a4c1c2..3cfe2cbb1fe6 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2706,6 +2706,44 @@ backoff:
}
EXPORT_SYMBOL(drm_atomic_helper_connector_set_property);
+static int page_flip_common(
+ struct drm_atomic_state *state,
+ struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ struct drm_pending_vblank_event *event)
+{
+ struct drm_plane *plane = crtc->primary;
+ struct drm_plane_state *plane_state;
+ struct drm_crtc_state *crtc_state;
+ int ret = 0;
+
+ crtc_state = drm_atomic_get_crtc_state(state, crtc);
+ if (IS_ERR(crtc_state))
+ return PTR_ERR(crtc_state);
+
+ crtc_state->event = event;
+
+ plane_state = drm_atomic_get_plane_state(state, plane);
+ if (IS_ERR(plane_state))
+ return PTR_ERR(plane_state);
+
+
+ ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
+ if (ret != 0)
+ return ret;
+ drm_atomic_set_fb_for_plane(plane_state, fb);
+
+ /* Make sure we don't accidentally do a full modeset. */
+ state->allow_modeset = false;
+ if (!crtc_state->active) {
+ DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n",
+ crtc->base.id);
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
/**
* drm_atomic_helper_page_flip - execute a legacy page flip
* @crtc: DRM crtc
@@ -2713,7 +2751,8 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_set_property);
* @event: optional DRM event to signal upon completion
* @flags: flip flags for non-vblank sync'ed updates
*
- * Provides a default page flip implementation using the atomic driver interface.
+ * Provides a default &drm_crtc_funcs.page_flip implementation
+ * using the atomic driver interface.
*
* Note that for now so called async page flips (i.e. updates which are not
* synchronized to vblank) are not supported, since the atomic interfaces have
@@ -2721,6 +2760,9 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_set_property);
*
* Returns:
* Returns 0 on success, negative errno numbers on failure.
+ *
+ * See also:
+ * drm_atomic_helper_page_flip_target()
*/
int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
@@ -2729,8 +2771,6 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
{
struct drm_plane *plane = crtc->primary;
struct drm_atomic_state *state;
- struct drm_plane_state *plane_state;
- struct drm_crtc_state *crtc_state;
int ret = 0;
if (flags & DRM_MODE_PAGE_FLIP_ASYNC)
@@ -2741,35 +2781,86 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
return -ENOMEM;
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
+
retry:
- crtc_state = drm_atomic_get_crtc_state(state, crtc);
- if (IS_ERR(crtc_state)) {
- ret = PTR_ERR(crtc_state);
+ ret = page_flip_common(state, crtc, fb, event);
+ if (ret != 0)
goto fail;
- }
- crtc_state->event = event;
- plane_state = drm_atomic_get_plane_state(state, plane);
- if (IS_ERR(plane_state)) {
- ret = PTR_ERR(plane_state);
- goto fail;
- }
+ ret = drm_atomic_nonblocking_commit(state);
- ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
+fail:
+ if (ret == -EDEADLK)
+ goto backoff;
+
+ drm_atomic_state_put(state);
+ return ret;
+
+backoff:
+ drm_atomic_state_clear(state);
+ drm_atomic_legacy_backoff(state);
+
+ /*
+ * Someone might have exchanged the framebuffer while we dropped locks
+ * in the backoff code. We need to fix up the fb refcount tracking the
+ * core does for us.
+ */
+ plane->old_fb = plane->fb;
+
+ goto retry;
+}
+EXPORT_SYMBOL(drm_atomic_helper_page_flip);
+
+/**
+ * drm_atomic_helper_page_flip_target - do page flip on target vblank period.
+ * @crtc: DRM crtc
+ * @fb: DRM framebuffer
+ * @event: optional DRM event to signal upon completion
+ * @flags: flip flags for non-vblank sync'ed updates
+ * @target: specifying the target vblank period when the flip to take effect
+ *
+ * Provides a default &drm_crtc_funcs.page_flip_target implementation.
+ * Similar to drm_atomic_helper_page_flip() with extra parameter to specify
+ * target vblank period to flip.
+ *
+ * Returns:
+ * Returns 0 on success, negative errno numbers on failure.
+ */
+int drm_atomic_helper_page_flip_target(
+ struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ struct drm_pending_vblank_event *event,
+ uint32_t flags,
+ uint32_t target)
+{
+ struct drm_plane *plane = crtc->primary;
+ struct drm_atomic_state *state;
+ struct drm_crtc_state *crtc_state;
+ int ret = 0;
+
+ if (flags & DRM_MODE_PAGE_FLIP_ASYNC)
+ return -EINVAL;
+
+ state = drm_atomic_state_alloc(plane->dev);
+ if (!state)
+ return -ENOMEM;
+
+ state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
+
+retry:
+ ret = page_flip_common(state, crtc, fb, event);
if (ret != 0)
goto fail;
- drm_atomic_set_fb_for_plane(plane_state, fb);
- /* Make sure we don't accidentally do a full modeset. */
- state->allow_modeset = false;
- if (!crtc_state->active) {
- DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n",
- crtc->base.id);
+ crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
+ if (WARN_ON(!crtc_state)) {
ret = -EINVAL;
goto fail;
}
+ crtc_state->target_vblank = target;
ret = drm_atomic_nonblocking_commit(state);
+
fail:
if (ret == -EDEADLK)
goto backoff;
@@ -2790,7 +2881,7 @@ backoff:
goto retry;
}
-EXPORT_SYMBOL(drm_atomic_helper_page_flip);
+EXPORT_SYMBOL(drm_atomic_helper_page_flip_target);
/**
* drm_atomic_helper_connector_dpms() - connector dpms helper implementation
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index 4b2353dc34ba..9afcd3810785 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -121,6 +121,12 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t flags);
+int drm_atomic_helper_page_flip_target(
+ struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ struct drm_pending_vblank_event *event,
+ uint32_t flags,
+ uint32_t target);
int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
int mode);
struct drm_encoder *
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 17c9f52d6ecb..06c943d1e04c 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -149,6 +149,15 @@ struct drm_crtc_state {
struct drm_property_blob *gamma_lut;
/**
+ * @target_vblank:
+ *
+ * Target vertical blank period when a page flip
+ * should take effect.
+ */
+
+ u32 target_vblank;
+
+ /**
* @event:
*
* Optional pointer to a DRM event to signal upon completion of the