linux-kernel - [PATCH AUTOSEL 4.19 21/44] drm/edid: Add 6 bpc quirk for BOE panel.

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Date:   Tue, 13 Nov 2018 00:49:27 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     stable@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     "Lee, Shawn C" <shawn.c.lee@...el.com>,
        Jani Nikula <jani.nikula@...el.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Gustavo Padovan <gustavo@...ovan.org>,
        Cooper Chiou <cooper.chiou@...el.com>, Lee@...r.kernel.org,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Sasha Levin <sashal@...nel.org>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 4.19 21/44] drm/edid: Add 6 bpc quirk for BOE panel.

From: "Lee, Shawn C" <shawn.c.lee@...el.com>

[ Upstream commit 922dceff8dc1fb4dafc9af78139ba65671408103 ]

BOE panel (ID: 0x0771) that reports "DFP 1.x compliant TMDS".
But it's 6bpc panel only instead of 8 bpc.

Add panel ID to edid quirk list and set 6 bpc as default to
work around this issue.

Cc: Jani Nikula <jani.nikula@...el.com>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc: Gustavo Padovan <gustavo@...ovan.org>
Cc: Cooper Chiou <cooper.chiou@...el.com>
Signed-off-by: Lee, Shawn C <shawn.c.lee@...el.com>>
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1540792173-7288-1-git-send-email-shawn.c.lee@intel.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/drm_edid.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index ff0bfc65a8c1..b506e3622b08 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -122,6 +122,9 @@ static const struct edid_quirk {
 	/* SDC panel of Lenovo B50-80 reports 8 bpc, but is a 6 bpc panel */
 	{ "SDC", 0x3652, EDID_QUIRK_FORCE_6BPC },
 
+	/* BOE model 0x0771 reports 8 bpc, but is a 6 bpc panel */
+	{ "BOE", 0x0771, EDID_QUIRK_FORCE_6BPC },
+
 	/* Belinea 10 15 55 */
 	{ "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
 	{ "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
-- 
2.17.1