[PATCH] drm/vc4: Return -EBUSY if there's already a pending flip event.

[robert.foss at collabora.com]

From: Robert Foss <robert.foss at collabora.com>


As per the docs, atomic_commit should return -EBUSY "if an asycnhronous
update is requested and there is an earlier update pending".


This patch is based on the rockchip patch below:
    http://article.gmane.org/gmane.comp.video.dri.devel/151678

Note: This patch was resent as the original submission wasn't addressed
      to the apparopriate recipients.

Robert Foss (1):
  drm/vc4: Return -EBUSY if there's already a pending flip event.

 drivers/gpu/drm/vc4/vc4_crtc.c |  6 ++++++
 drivers/gpu/drm/vc4/vc4_drv.h  |  1 +
 drivers/gpu/drm/vc4/vc4_kms.c  | 20 ++++++++++++++++++--
 3 files changed, 25 insertions(+), 2 deletions(-)

-- 
2.5.0