1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_link.h b/drivers/gpu/drm/msm/dp/dp_link.h
index e9d54db8fb61..49811b6221e5 100644
--- a/drivers/gpu/drm/msm/dp/dp_link.h
+++ b/drivers/gpu/drm/msm/dp/dp_link.h
@@ -112,6 +112,29 @@ static inline u32 dp_link_bit_depth_to_bpp(u32 tbd)
 	}
 }
 
+/**
+ * dp_test_bit_depth_to_bpc() - convert test bit depth to bpc
+ * @tbd: test bit depth
+ *
+ * Returns the bits per comp (bpc) to be used corresponding to the
+ * bit depth value. This function assumes that bit depth has
+ * already been validated.
+ */
+static inline u32 dp_link_bit_depth_to_bpc(u32 tbd)
+{
+	switch (tbd) {
+	case DP_TEST_BIT_DEPTH_6:
+		return 6;
+	case DP_TEST_BIT_DEPTH_8:
+		return 8;
+	case DP_TEST_BIT_DEPTH_10:
+		return 10;
+	case DP_TEST_BIT_DEPTH_UNKNOWN:
+	default:
+		return 0;
+	}
+}
+
 u32 dp_link_get_test_bits_depth(struct dp_link *dp_link, u32 bpp);
 int dp_link_process_request(struct dp_link *dp_link);
 int dp_link_get_colorimetry_config(struct dp_link *dp_link);