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drm/edid: Add 6 bpc quirk for CPT panel in Asus UX303LA
author
Kai-Heng Feng
<kai.heng.feng@canonical.com>
Sun, 18 Feb 2018 08:53:59 +0000
(16:53 +0800)
committer
Daniel Vetter
<daniel.vetter@ffwll.ch>
Mon, 19 Feb 2018 15:43:50 +0000
(16:43 +0100)
Similar to commit
e10aec652f31
("drm/edid: Add 6 bpc quirk for display
AEO model 0."), the EDID reports "DFP 1.x compliant TMDS" but it support
6bpc instead of 8 bpc.
Hence, use 6 bpc quirk for this panel.
Fixes:
196f954e2509
("drm/i915/dp: Revert "drm/i915/dp: fall back to 18 bpp when sink capability is unknown"")
BugLink:
https://bugs.launchpad.net/bugs/1749420
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Reviewed-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: <stable@vger.kernel.org> # v4.8+
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link:
https://patchwork.freedesktop.org/patch/msgid/20180218085359.7817-1-kai.heng.feng@canonical.com
drivers/gpu/drm/drm_edid.c
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diff --git
a/drivers/gpu/drm/drm_edid.c
b/drivers/gpu/drm/drm_edid.c
index
cb48714
..
16fb76b
100644
(file)
--- a/
drivers/gpu/drm/drm_edid.c
+++ b/
drivers/gpu/drm/drm_edid.c
@@
-113,6
+113,9
@@
static const struct edid_quirk {
/* AEO model 0 reports 8 bpc, but is a 6 bpc panel */
{ "AEO", 0, EDID_QUIRK_FORCE_6BPC },
+ /* CPT panel of Asus UX303LA reports 8 bpc, but is a 6 bpc panel */
+ { "CPT", 0x17df, EDID_QUIRK_FORCE_6BPC },
+
/* Belinea 10 15 55 */
{ "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
{ "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },