drm/i915: Enable dither whenever display bpc < frame buffer bpc

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We want to enable dithering on any pipe where the frame buffer has
more color resolution than the output device.

The previous code was incorrectly clamping the frame buffer bpc to the
display bpc, effectively disabling dithering all of the time as the
computed frame buffer bpc would never be larger than the display bpc.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reported-by: Oliver Hartkopp <socketcan@hartkopp.net>
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>

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Keith Packard 2011-09-05 11:53:21 -07:00

parent 88ef4e3f4f

commit 578393cd1e

1 changed files with 6 additions and 4 deletions

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drivers/gpu/drm/i915/intel_display.c

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