Mario Kleiner e10aec652f drm/edid: Add 6 bpc quirk for display AEO model 0. ... Bugzilla https://bugzilla.kernel.org/show_bug.cgi?id=105331 reports that the "AEO model 0" display is driven with 8 bpc without dithering by default, which looks bad because that panel is apparently a 6 bpc DP panel with faulty EDID. A fix for this was made by commit 013dd9e038 ("drm/i915/dp: fall back to 18 bpp when sink capability is unknown"). That commit triggers new regressions in precision for DP->DVI and DP->VGA displays. A patch is out to revert that commit, but it will revert video output for the AEO model 0 panel to 8 bpc without dithering. The EDID 1.3 of that panel, as decoded from the xrandr output attached to that bugzilla bug report, is somewhat faulty, and beyond other problems also sets the "DFP 1.x compliant TMDS" bit, which according to DFP spec means to drive the panel with 8 bpc and no dithering in absence of other colorimetry information. Try to make the original bug reporter happy despite the faulty EDID by adding a quirk to mark that panel as 6 bpc, so 6 bpc output with dithering creates a nice picture. Tested by injecting the edid from the fdo bug into a DP connector via drm_kms_helper.edid_firmware and verifying the 6 bpc + dithering is selected. This patch should be backported to stable. Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com> Cc: stable@vger.kernel.org Cc: Jani Nikula <jani.nikula@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>		2016-08-09 08:56:00 +10:00
..
drm	drm/edid: Add 6 bpc quirk for display AEO model 0.	2016-08-09 08:56:00 +10:00
host1x	gpu: host1x: Remove useless local variable	2016-06-23 11:59:33 +02:00
ipu-v3	gpu: ipu-v3: ipu-dc: don't bug out on invalid bus_format	2016-07-12 18:26:05 +02:00
vga	vga_switcheroo: Sphinxify docs	2016-07-12 16:14:36 +02:00
Makefile