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(parent: cca9658) | patch
drm/msm: Fix dirtyfb refcounting
authorRob Clark <robdclark@chromium.org>
Fri, 4 Mar 2022 20:21:45 +0000 (12:21 -0800)
committerRob Clark <robdclark@chromium.org>
Mon, 7 Mar 2022 03:28:47 +0000 (19:28 -0800)
commit9225b337072a10bf9b09df8bf281437488dd8a26
tree831488dfa5cafa9e8c5976e9e49d489591d4819dtree | snapshot
parentcca96584b35765bf9eb5f38ca55a144ea2ba0de4commit | diff
drm/msm: Fix dirtyfb refcounting

refcount_t complains about 0->1 transitions, which isn't *quite* what we
wanted.  So use dirtyfb==1 to mean that the fb is not connected to any
output that requires dirtyfb flushing, so that we can keep the underflow
and overflow checking.

Fixes: 9e4dde28e9cd ("drm/msm: Avoid dirtyfb stalls on video mode displays (v2)")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Link: https://lore.kernel.org/r/20220304202146.845566-1-robdclark@gmail.com
drivers/gpu/drm/msm/msm_fb.c diff | blob | history
Domain: System / Kernel;