diff options
author | Matt Roper <matthew.d.roper@intel.com> | 2015-01-30 16:22:36 -0800 |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-01-31 10:35:41 +0100 |
commit | db068420560511de80ac59222644f2bdf278c3d5 (patch) | |
tree | 5439bd0fd233fab7f9ab1a06ce6c5f0fc388dfe8 | |
parent | 1293eaa3ebf92f146f366d9b678a07b8b3200ea1 (diff) |
drm/i915: Keep plane->state updated on pageflip
Until all drivers have transitioned to atomic, the framebuffer
associated with a plane is tracked in both plane->fb (for legacy) and
plane->state->fb (for all the new atomic codeflow). All of our modeset
and plane updates use drm_plane->update_plane(), so in theory plane->fb
and plane->state->fb should always stay in sync and point at the same
thing for i915. However we forgot about the pageflip ioctl case, which
currently only updates plane->fb and leaves plane->state->fb at a stale
value.
Surprisingly, this doesn't cause any real problems at the moment since
internally we use the plane->fb pointer in most of the places that
matter, and on the next .update_plane() call, we use plane->fb to figure
out which framebuffer to cleanup. However when we switch to the full
atomic helpers for update_plane()/disable_plane(), those helpers use
plane->state->fb to figure out which framebuffer to cleanup, so not
having updated the plane->state->fb pointer causes things to blow up
following a pageflip ioctl.
The fix here is to just make sure we update plane->state->fb at the same
time we update plane->fb in the pageflip ioctl.
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
-rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 3d220a67f865..08e2bab6ef47 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9801,6 +9801,13 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, crtc->primary->fb = fb; + /* Keep state structure in sync */ + if (crtc->primary->state->fb) + drm_framebuffer_unreference(crtc->primary->state->fb); + crtc->primary->state->fb = fb; + if (crtc->primary->state->fb) + drm_framebuffer_reference(crtc->primary->state->fb); + work->pending_flip_obj = obj; atomic_inc(&intel_crtc->unpin_work_count); |