diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 93b0221d5d0fd41ae0602cfe9559683eba2365af..45b4f34bebcd8dee65f2ca53b6cbfaf8805216cd 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1185,9 +1185,13 @@ EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); * * Helper to, after atomic commit, wait for vblanks on all effected * crtcs (ie. before cleaning up old framebuffers using - * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the + * drm_atomic_helper_cleanup_planes()). It will only wait on CRTCs where the * framebuffers have actually changed to optimize for the legacy cursor and * plane update use-case. + * + * Drivers using the nonblocking commit tracking support initialized by calling + * drm_atomic_helper_setup_commit() should look at + * drm_atomic_helper_wait_for_flip_done() as an alternative. */ void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, @@ -1234,6 +1238,43 @@ 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 + * @dev: DRM device + * @old_state: atomic state object with old state structures + * + * 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()). Compared to + * drm_atomic_helper_wait_for_vblanks() this waits for the completion of on all + * CRTCs, assuming that cursors-only updates are signalling their completion + * immediately (or using a different path). + * + * This requires that drivers use the nonblocking commit tracking support + * initialized using drm_atomic_helper_setup_commit(). + */ +void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev, + struct drm_atomic_state *old_state) +{ + struct drm_crtc_state *crtc_state; + struct drm_crtc *crtc; + int i; + + for_each_crtc_in_state(old_state, crtc, crtc_state, i) { + struct drm_crtc_commit *commit = old_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 f0a8678ae98e542c8632262437c3f5568ecf2398..3bfeb2b2f746ff65aab15623747a5cc7caa4cb53 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 *old_state); + void drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, struct drm_atomic_state *old_state); diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h index 85984b2082182b510479c806f3efae6301c1cd7a..474a1029ec7941a374b396b8f08a71d2bb2fdd5c 100644 --- a/include/drm/drm_modeset_helper_vtables.h +++ b/include/drm/drm_modeset_helper_vtables.h @@ -1169,7 +1169,8 @@ struct drm_mode_config_helper_funcs { * After the atomic update is committed to the hardware this hook needs * to call drm_atomic_helper_commit_hw_done(). Then wait for the upate * to be executed by the hardware, for example using - * drm_atomic_helper_wait_for_vblanks(), and then clean up the old + * drm_atomic_helper_wait_for_vblanks() or + * drm_atomic_helper_wait_for_flip_done(), and then clean up the old * framebuffers using drm_atomic_helper_cleanup_planes(). * * When disabling a CRTC this hook _must_ stall for the commit to