[PATCH 06/20] drm: Wake up all waiters for the vblank

Chris Wilson chris at chris-wilson.co.uk
Tue Aug 22 16:17:47 UTC 2017

As we have a single list for vblank waiters (not sorted by the vblank
they are waiting for), make sure we wake up all waiters rather than just
the first as we may have multiple consumers for this vblank event.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Daniel Vetter <daniel.vetter at intel.com>
 drivers/gpu/drm/drm_vblank.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index 70f2b9593edc..930e3ed5234b 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -1118,7 +1118,7 @@ void drm_crtc_vblank_off(struct drm_crtc *crtc)
 	if (drm_core_check_feature(dev, DRIVER_ATOMIC) || !vblank->inmodeset)
 		drm_vblank_disable_and_save(dev, pipe);
-	wake_up(&vblank->queue);
+	wake_up_all(&vblank->queue);
 	 * Prevent subsequent drm_vblank_get() from re-enabling
@@ -1572,7 +1572,7 @@ bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe)
-	wake_up(&vblank->queue);
+	wake_up_all(&vblank->queue);
 	/* With instant-off, we defer disabling the interrupt until after
 	 * we finish processing the following vblank after all events have

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