drm/i915/fbc: Skip nuke when flip is pending

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Don't issue a nuke from frontbuffer flush while a flip is pending.
This avoids the DSPADDR/DSPSURF rmw abuse from the pre-snb nuke
from racing with the DSPADDR/DSPSURF write being performed by
the flip/plane update. The flip itself will already cause the nuke
so a double nuke is redundant.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220315140001.1172-4-ville.syrjala@linux.intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>

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This commit is contained in:

Ville Syrjälä 2022-03-15 15:59:57 +02:00

parent 529b43dfcd

commit de5bd083d2

1 changed files with 8 additions and 2 deletions

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drivers/gpu/drm/i915/display/intel_fbc.c

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