[PATCH 4/7] drm: rcar-du: Move rcar_du_output_name() to rcar_du_common.c

[Biju Das <biju.das.jz@xxxxxxxxxxxxxx>]

RZ/G2L SoC's does not have group/plane registers compared to RCar, hence it
needs a different CRTC implementation.

Move rcar_du_output_name() to a new common file rcar_du_common.c, So that
the same function can be reused by RZ/G2L SoC later.

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
RFC->v1:
 New patch
---
 drivers/gpu/drm/rcar-du/Makefile         |  1 +
 drivers/gpu/drm/rcar-du/rcar_du_common.c | 30 ++++++++++++++++++++++++
 drivers/gpu/drm/rcar-du/rcar_du_drv.c    | 20 ----------------
 3 files changed, 31 insertions(+), 20 deletions(-)
 create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_common.c

diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
index 5b5d9b1821f7..7475c329e2cf 100644
--- a/drivers/gpu/drm/rcar-du/Makefile
+++ b/drivers/gpu/drm/rcar-du/Makefile
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 rcar-du-drm-y := rcar_du_crtc.o \
+		 rcar_du_common.o \
 		 rcar_du_drv.o \
 		 rcar_du_encoder.o \
 		 rcar_du_group.o \
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_common.c b/drivers/gpu/drm/rcar-du/rcar_du_common.c
new file mode 100644
index 000000000000..f9f9908cda6d
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_common.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * rcar_du_common.c  --  R-Car Display Unit Common
+ *
+ * Copyright (C) 2013-2022 Renesas Electronics Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@xxxxxxxxxxxxxxxx)
+ */
+
+#include "rcar_du_drv.h"
+
+const char *rcar_du_output_name(enum rcar_du_output output)
+{
+	static const char * const names[] = {
+		[RCAR_DU_OUTPUT_DPAD0] = "DPAD0",
+		[RCAR_DU_OUTPUT_DPAD1] = "DPAD1",
+		[RCAR_DU_OUTPUT_DSI0] = "DSI0",
+		[RCAR_DU_OUTPUT_DSI1] = "DSI1",
+		[RCAR_DU_OUTPUT_HDMI0] = "HDMI0",
+		[RCAR_DU_OUTPUT_HDMI1] = "HDMI1",
+		[RCAR_DU_OUTPUT_LVDS0] = "LVDS0",
+		[RCAR_DU_OUTPUT_LVDS1] = "LVDS1",
+		[RCAR_DU_OUTPUT_TCON] = "TCON",
+	};
+
+	if (output >= ARRAY_SIZE(names) || !names[output])
+		return "UNKNOWN";
+
+	return names[output];
+}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 4640c356a532..f6e234dafb72 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -591,26 +591,6 @@ static const struct of_device_id rcar_du_of_table[] = {
 
 MODULE_DEVICE_TABLE(of, rcar_du_of_table);
 
-const char *rcar_du_output_name(enum rcar_du_output output)
-{
-	static const char * const names[] = {
-		[RCAR_DU_OUTPUT_DPAD0] = "DPAD0",
-		[RCAR_DU_OUTPUT_DPAD1] = "DPAD1",
-		[RCAR_DU_OUTPUT_DSI0] = "DSI0",
-		[RCAR_DU_OUTPUT_DSI1] = "DSI1",
-		[RCAR_DU_OUTPUT_HDMI0] = "HDMI0",
-		[RCAR_DU_OUTPUT_HDMI1] = "HDMI1",
-		[RCAR_DU_OUTPUT_LVDS0] = "LVDS0",
-		[RCAR_DU_OUTPUT_LVDS1] = "LVDS1",
-		[RCAR_DU_OUTPUT_TCON] = "TCON",
-	};
-
-	if (output >= ARRAY_SIZE(names) || !names[output])
-		return "UNKNOWN";
-
-	return names[output];
-}
-
 /* -----------------------------------------------------------------------------
  * DRM operations
  */
-- 
2.17.1