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

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Message-Id: <20181002152911.4370-1-kai.heng.feng@canonical.com>
Date:   Tue,  2 Oct 2018 23:29:11 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     gustavo@...ovan.org, maarten.lankhorst@...ux.intel.com,
        sean@...rly.run, airlied@...ux.ie
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        stable@...r.kernel.org
Subject: [PATCH] drm/edid: Add 6 bpc quirk for BOE panel in HP Pavilion 15-n233sl

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@...r.kernel.org> # v4.8+
Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
 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 3c9fc99648b7..1e2b9407c8d0 100644
--- 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 },
 
+	/* 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 },
 
-- 
2.17.1