Thinkpad_L540_6.x.patch

diff -urN linux-6.1.27.orig/drivers/gpu/drm/drm_edid.c linux-6.1.27/drivers/gpu/drm/drm_edid.c
--- linux-6.1.27.orig/drivers/gpu/drm/drm_edid.c	2023-06-14 09:36:35.867074457 +0200
+++ linux-6.1.27/drivers/gpu/drm/drm_edid.c	2023-06-14 09:34:46.078861188 +0200
@@ -158,6 +158,9 @@
 	/* LGD panel of HP zBook 17 G2, eDP 10 bpc, but reports unknown bpc */
 	EDID_QUIRK('L', 'G', 'D', 764, EDID_QUIRK_FORCE_10BPC),
 
+	/* LGD panel of Lenovo L540 reports 8 bpc, but is a 6 bpc panel */
+	EDID_QUIRK('L', 'G', 'D', 0x038e, EDID_QUIRK_FORCE_6BPC),
+
 	/* LG Philips LCD LP154W01-A5 */
 	EDID_QUIRK('L', 'P', 'L', 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE),
 	EDID_QUIRK('L', 'P', 'L', 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE),