[PATCH] Lenovo X13 Yoga OLED panel brightness fix

[Mark Pearson]

Hi,

Patch to fix an issue controlling the brightness of the OLED panel on the Lenovo X13 Yoga 
Please let me know any feedback or questions.
Note - apologies if this message has shown up before - I had some mail client issues.

Mark Pearson
---------------------------------

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: jendrina at lenovo.com
Signed-off-by: Mark Pearson <mpearson at lenovo.com>
Reviewed-by: Lyude Paul <lyude at redhat.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 c6fbe6e6bc9d..41f0e797ce8c 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -1313,6 +1313,7 @@ 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
-- 
2.26.