Add an helper to wait for all page flips of an atomic state to be done.
Signed-off-by: Boris Brezillon <boris.brezil...@free-electrons.com>
---
drivers/gpu/drm/drm_atomic_helper.c | 30 ++++++++++++++++++++++++++++++
include/drm/drm_atomic_helper.h | 3 +++
2 files changed, 33 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c
b/drivers/gpu/drm/drm_atomic_helper.c
index fa2d8d7a602a..11f2d644771b 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1166,6 +1166,36 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device
*dev,
EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks);
/**
+ * drm_atomic_helper_wait_for_flip_done - wait for all page flips to be done
+ * @state: atomic state object
+ *
+ * Helper to, after atomic commit, wait for page flips on all effected
+ * crtcs (ie. before cleaning up old framebuffers using
+ * drm_atomic_helper_cleanup_planes()).
+ */
+void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
+ struct drm_atomic_state *state)
+{
+ struct drm_crtc_state *crtc_state;
+ struct drm_crtc *crtc;
+ int i;
+
+ for_each_crtc_in_state(state, crtc, crtc_state, i) {
+ struct drm_crtc_commit *commit = state->crtcs[i].commit;
+ int ret;
+
+ if (!commit)
+ continue;
+
+ ret = wait_for_completion_timeout(&commit->flip_done, 10 * HZ);
+ if (ret == 0)
+ DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n",
+ crtc->base.id, crtc->name);
+ }
+}
+EXPORT_SYMBOL(drm_atomic_helper_wait_for_flip_done);
+
+/**
* drm_atomic_helper_commit_tail - commit atomic update to hardware
* @old_state: atomic state object with old state structures
*
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index f0a8678ae98e..7192e7ac117f 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -52,6 +52,9 @@ int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
struct drm_atomic_state *old_state);
+void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
+ struct drm_atomic_state *state);
+
void
drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
struct drm_atomic_state
*old_state);
--
2.7.4
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