[6/6,SRU,F] USUNTU: SAUCE: drm/i915: Force DPCD backlight mode on Dell Precision 4K sku
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Message ID 20191212090744.15106-14-acelan.kao@canonical.com
State New
Headers show
Series
  • Untitled series #148018
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Commit Message

AceLan Kao Dec. 12, 2019, 9:07 a.m. UTC
BugLink: https://bugs.launchpad.net/bugs/1856134

This platform using DPCD aux to control backlight,
so adding the first 3 OUI bytes to the quirk.

Signed-off-by: AceLan Kao <acelan.kao@canonical.com>
---
 drivers/gpu/drm/drm_dp_helper.c | 1 +
 1 file changed, 1 insertion(+)

Patch
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diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index f1f14f4144e3..0d3381f1377b 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -1264,6 +1264,7 @@  static const struct dpcd_quirk dpcd_quirk_list[] = {
 	 * only supports DPCD backlight controls, despite advertising otherwise
 	 */
 	{ OUI(0xba, 0x41, 0x59), DEVICE_ID_ANY, false, BIT(DP_DPCD_QUIRK_FORCE_DPCD_BACKLIGHT) },
+	{ OUI(0x38, 0xec, 0x11), DEVICE_ID_ANY, false, BIT(DP_DPCD_QUIRK_FORCE_DPCD_BACKLIGHT) },
 };
 
 #undef OUI