diff options
Diffstat (limited to 'drivers/gpu/drm/drm_atomic.c')
| -rw-r--r-- | drivers/gpu/drm/drm_atomic.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index dda60051854b..b1efa9322be2 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -53,6 +53,45 @@ void __drm_crtc_commit_free(struct kref *kref) EXPORT_SYMBOL(__drm_crtc_commit_free); /** + * drm_crtc_commit_wait - Waits for a commit to complete + * @commit: &drm_crtc_commit to wait for + * + * Waits for a given &drm_crtc_commit to be programmed into the + * hardware and flipped to. + * + * Returns: + * + * 0 on success, a negative error code otherwise. + */ +int drm_crtc_commit_wait(struct drm_crtc_commit *commit) +{ + unsigned long timeout = 10 * HZ; + int ret; + + if (!commit) + return 0; + + ret = wait_for_completion_timeout(&commit->hw_done, timeout); + if (!ret) { + DRM_ERROR("hw_done timed out\n"); + return -ETIMEDOUT; + } + + /* + * Currently no support for overwriting flips, hence + * stall for previous one to execute completely. + */ + ret = wait_for_completion_timeout(&commit->flip_done, timeout); + if (!ret) { + DRM_ERROR("flip_done timed out\n"); + return -ETIMEDOUT; + } + + return 0; +} +EXPORT_SYMBOL(drm_crtc_commit_wait); + +/** * drm_atomic_state_default_release - * release memory initialized by drm_atomic_state_init * @state: atomic state |