linux-kernel - [PATCH 2/2] drm/dp: HP DreamColor panel brigntness fix

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Message-Id: <20201007065915.13883-2-kai.heng.feng@canonical.com>
Date:   Wed,  7 Oct 2020 14:58:21 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Cc:     Kai-Heng Feng <kai.heng.feng@...onical.com>,
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 2/2] drm/dp: HP DreamColor panel brigntness fix

HP DreamColor panel, which is used by new HP ZBook Studio, needs to use
DPCD to control brightness.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
 drivers/gpu/drm/drm_dp_helper.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 092c8c985911..b3d0ea1b082b 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -1321,6 +1321,7 @@ static const struct edid_quirk edid_quirk_list[] = {
 	 */
 	{ MFG(0x06, 0xaf), PROD_ID(0x9b, 0x32), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
 	{ MFG(0x06, 0xaf), PROD_ID(0xeb, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
+	{ MFG(0x30, 0xe4), PROD_ID(0x61, 0x06), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
 	{ MFG(0x4d, 0x10), PROD_ID(0xc7, 0x14), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
 	{ MFG(0x4d, 0x10), PROD_ID(0xe6, 0x14), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
 	{ MFG(0x4c, 0x83), PROD_ID(0x47, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
-- 
2.17.1