drm/i915: Deal with cpp==8 for g4x watermarks

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Docs tell us that on g4x we have to compute the SR watermarks
using 4 bytes per pixel. I'm going to assume that only applies
to 1 and 2 byte per pixel formats, and not 8 byte per pixel
formats. That seems like a recipe for an insufficient watermark
which could lead to underruns. Use the maximum of the two numbers
instead.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190703200824.5971-5-ville.syrjala@linux.intel.com

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Ville Syrjälä 2019-07-03 23:08:22 +03:00

parent 94e15723df

commit d56e823ac3

1 changed files with 3 additions and 3 deletions

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drivers/gpu/drm/i915/intel_pm.c

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