drm/radeon/kms: update display watermark calculations for DCE5

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/evergreen.c

@@ -401,15 +401,27 @@ static u32 evergreen_line_buffer_adjust(struct radeon_device *rdev,
 	case 0:
 	case 4:
 	default:
+		if (ASIC_IS_DCE5(rdev))
+			return 4096 * 2;
+		else
 			return 3840 * 2;
 	case 1:
 	case 5:
+		if (ASIC_IS_DCE5(rdev))
+			return 6144 * 2;
+		else
 			return 5760 * 2;
 	case 2:
 	case 6:
+		if (ASIC_IS_DCE5(rdev))
+			return 8192 * 2;
+		else
 			return 7680 * 2;
 	case 3:
 	case 7:
+		if (ASIC_IS_DCE5(rdev))
+			return 2048 * 2;
+		else
 			return 1920 * 2;
 	}
 }