]> 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)
commitcea2c91208c743d4ae4242dd488f51caf43c0a9f
tree0abfb84a29cdc757d90a38abe3f07324e40421ff
parentae7ce1f433e7554abda22b607f7f0f6fef33142a
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