[PATCH 4.9 160/171] drm/edid: Add 6 bpc quirk for BOE panel in HP Pavilion 15-n233sl

From: Greg Kroah-Hartman
Date: Thu Nov 08 2018 - 17:16:32 EST


4.9-stable review patch. If anyone has any objections, please let me know.

------------------

From: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>

commit 0711a43b6d84ff9189adfbf83c8bbf56eef794bf upstream.

There's another panel that reports "DFP 1.x compliant TMDS" but it
supports 6bpc instead of 8 bpc.

Apply 6 bpc quirk for the panel to fix it.

BugLink: https://bugs.launchpad.net/bugs/1794387
Cc: <stable@xxxxxxxxxxxxxxx> # v4.8+
Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20181002152911.4370-1-kai.heng.feng@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/gpu/drm/drm_edid.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -107,6 +107,9 @@ static const struct edid_quirk {
/* AEO model 0 reports 8 bpc, but is a 6 bpc panel */
{ "AEO", 0, EDID_QUIRK_FORCE_6BPC },

+ /* BOE model on HP Pavilion 15-n233sl reports 8 bpc, but is a 6 bpc panel */
+ { "BOE", 0x78b, EDID_QUIRK_FORCE_6BPC },
+
/* CPT panel of Asus UX303LA reports 8 bpc, but is a 6 bpc panel */
{ "CPT", 0x17df, EDID_QUIRK_FORCE_6BPC },