[PATCH] Lenovo X13 Yoga OLED panel brightness fix

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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.

 

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@xxxxxxxxxx

Signed-off-by: jendrina@xxxxxxxxxx

Signed-off-by: Mark Pearson <mpearson@xxxxxxxxxx>

Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx>

---

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.

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