]> git.karo-electronics.de Git - karo-tx-linux.git/commit
drm/i915/dp: fall back to 18 bpp when sink capability is unknown
authorJani Nikula <jani.nikula@intel.com>
Wed, 13 Jan 2016 14:35:20 +0000 (16:35 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 3 Mar 2016 23:07:22 +0000 (15:07 -0800)
commit6de4682d2845d6aa8883ae62e3ed1b2f915df4e8
treea4395fb7c775a0349c6fd2e2ae5eeab399d2e573
parentf39741673c3d54bc84ec30b4e1d21daa75bbcb02
drm/i915/dp: fall back to 18 bpp when sink capability is unknown

commit 5efd407674068dede403551bea3b0b134c32513a upstream.

Per DP spec, the source device should fall back to 18 bpp, VESA range
RGB when the sink capability is unknown. Fix the color depth
clamping. 18 bpp color depth should ensure full color range in automatic
mode.

The clamping has been HDMI specific since its introduction in

commit 996a2239f93b03c5972923f04b097f65565c5bed
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Fri Apr 19 11:24:34 2013 +0200

    drm/i915: Disable high-bpc on pre-1.4 EDID screens

Reported-and-tested-by: Dihan Wickremasuriya <nayomal@gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=105331
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452695720-7076-1-git-send-email-jani.nikula@intel.com
(cherry picked from commit 013dd9e038723bbd2aa67be51847384b75be8253)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/gpu/drm/i915/intel_display.c