]> git.baikalelectronics.ru Git - kernel.git/commit
drm/i915: Enable dither whenever display bpc < frame buffer bpc
authorKeith Packard <keithp@keithp.com>
Mon, 5 Sep 2011 18:53:21 +0000 (11:53 -0700)
committerKeith Packard <keithp@keithp.com>
Tue, 20 Sep 2011 01:02:51 +0000 (18:02 -0700)
commitaf7a562cec51d37cc55e289ddd8327d77e006a1d
tree0abfb84a29cdc757d90a38abe3f07324e40421ff
parentcd4e4ef222ff5c5707528a2fc35aa68344da5e4f
drm/i915: Enable dither whenever display bpc < frame buffer bpc

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>
drivers/gpu/drm/i915/intel_display.c