[PATCH 1/1] drm/dp: Lenovo X13 Yoga OLED panel brightness fix

Aaron Ma aaron.ma at canonical.com
Fri Jul 17 08:52:11 UTC 2020

From: Mark Pearson <mpearson.lenovo at gmail.com>

BugLink: https://bugs.launchpad.net/bugs/1887909

Add another panel that needs the edid quirk to the list so that
brightness control works correctly. Fixes issue seen on Lenovo X13 Yoga
with OLED panel

Co-developed-by: jendrina at lenovo.com
Signed-off-by: Mark Pearson <mpearson at gmail.com>
[fixed commit message, sobs]
Signed-off-by: Lyude Paul <lyude at redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200519025635.22846-1-mpearson@lenovo.com
(cherry picked from commit 0df3ff451287d71c620384eb7bb2cd3a8106412c)
Signed-off-by: Aaron Ma <aaron.ma at canonical.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 94553be0eacf..ab7c9d98ef94 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -1339,6 +1339,7 @@ static const struct edid_quirk edid_quirk_list[] = {
 	{ MFG(0x06, 0xaf), PROD_ID(0xeb, 0x41), 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) },
 #undef MFG

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