diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 43e57632b00a..19c99dddcb99 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -1315,6 +1315,7 @@ 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
diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index 758bf74e1cab..2d5ce690d214 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -342,8 +342,8 @@ static void drm_update_vblank_count(struct drm_device *dev, unsigned int pipe,
 
 	DRM_DEBUG_VBL("updating vblank count on crtc %u:"
 		      " current=%llu, diff=%u, hw=%u hw_last=%u\n",
-		      pipe, atomic64_read(&vblank->count), diff,
-		      cur_vblank, vblank->last);
+		      pipe, (unsigned long long)atomic64_read(&vblank->count),
+		      diff, cur_vblank, vblank->last);
 
 	if (diff == 0) {
 		WARN_ON_ONCE(cur_vblank != vblank->last);