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authorStefan Agner <stefan@agner.ch>2018-08-07 23:11:43 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2018-08-08 11:25:39 +0300
commite750218d26c3648698bfe9e2858012443f08c734 (patch)
tree21d57a103293c52c2c9dbabb46df202093361753 /drivers
parent31e63d31eaf066651efac299913591b04c5aaa18 (diff)
downloadlinux-e750218d26c3648698bfe9e2858012443f08c734.tar.xz
drm/doc: clarify how to acquire required vblank event reference
As a driver write it is not entirely obvious that a reference to the event e mentioned in the doc can be obtained via drm_crtc_vblank_get(). Clarify how to obtain the reference. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20180807201143.7446-1-stefan@agner.ch
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/drm_vblank.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index 28cdcf76b6f9..7610ff466ef9 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -873,8 +873,8 @@ static void send_vblank_event(struct drm_device *dev,
* handler by calling drm_crtc_send_vblank_event() and make sure that there's no
* possible race with the hardware committing the atomic update.
*
- * Caller must hold a vblank reference for the event @e, which will be dropped
- * when the next vblank arrives.
+ * Caller must hold a vblank reference for the event @e acquired by a
+ * drm_crtc_vblank_get(), which will be dropped when the next vblank arrives.
*/
void drm_crtc_arm_vblank_event(struct drm_crtc *crtc,
struct drm_pending_vblank_event *e)