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drm/edid: Add 10 bpc quirk for LGD 764 panel in HP zBook 17 G2

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commit e345da82bd6bdfa8492f80b3ce4370acfd868d95 upstream.

The builtin eDP panel in the HP zBook 17 G2 supports 10 bpc,
as advertised by the Laptops product specs and verified via
injecting a fixed edid + photometer measurements, but edid
reports unknown depth, so drivers fall back to 6 bpc.

Add a quirk to get the full 10 bpc.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1492787108-23959-1-git-send-email-mario.kleiner.de@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mario Kleiner 2017-04-21 17:05:08 +02:00 committed by Greg Kroah-Hartman
parent 5956b2815f
commit 5438f89529
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/drm_edid.c
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@ -76,6 +76,8 @@
#define EDID_QUIRK_FORCE_12BPC (1 << 9)
/* Force 6bpc */
#define EDID_QUIRK_FORCE_6BPC (1 << 10)
/* Force 10bpc */
#define EDID_QUIRK_FORCE_10BPC (1 << 11)
struct detailed_mode_closure {
struct drm_connector *connector;
@ -118,6 +120,9 @@ static const struct edid_quirk {
{ "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
EDID_QUIRK_DETAILED_IN_CM },
/* LGD panel of HP zBook 17 G2, eDP 10 bpc, but reports unknown bpc */
{ "LGD", 764, EDID_QUIRK_FORCE_10BPC },
/* LG Philips LCD LP154W01-A5 */
{ "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
{ "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
@ -4105,6 +4110,9 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
if (quirks & EDID_QUIRK_FORCE_8BPC)
connector->display_info.bpc = 8;
if (quirks & EDID_QUIRK_FORCE_10BPC)
connector->display_info.bpc = 10;
if (quirks & EDID_QUIRK_FORCE_12BPC)
connector->display_info.bpc = 12;