diff options
author | Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-06-02 11:32:06 +0300 |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-06-22 16:11:51 +0300 |
commit | 0108648749bfa5713ed0ceede2ee091f428a29d7 (patch) | |
tree | 03efe26dc3538bfee4c55894cf9874b0ccee42b7 | |
parent | 2b3d860efa3461af109469e6de2eea48f6ef5cdd (diff) | |
download | linux-0108648749bfa5713ed0ceede2ee091f428a29d7.tar.xz |
drm: Add drm_atomic_helper_wait_for_flip_done()
Add an helper to wait for all page flips of an atomic state to be done.
v2:
- Pimp kerneldoc as discussed with Boris on irc
- Add missing doc for @dev.
- Use old_state for consitency with wait_for_vblanks
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> (v1)
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1496392332-8722-2-git-send-email-boris.brezillon@free-electrons.com
-rw-r--r-- | drivers/gpu/drm/drm_atomic_helper.c | 43 | ||||
-rw-r--r-- | include/drm/drm_atomic_helper.h | 3 | ||||
-rw-r--r-- | include/drm/drm_modeset_helper_vtables.h | 3 |
3 files changed, 47 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 93b0221d5d0f..45b4f34bebcd 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, @@ -1235,6 +1239,43 @@ 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 f0a8678ae98e..3bfeb2b2f746 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 85984b208218..474a1029ec79 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 |