drm: renesas: shmobile: Use media bus formats in platform data

Replace the custom shmob_drm_interface enumeration values with standard
media bus formats.  This simplifies driver handling of bus formats and
prepares for DT support.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/0a15e5100ca30d14953c93550eb1d4c2e18de939.1694767209.git.geert+renesas@glider.be

drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c

@@ -9,6 +9,7 @@
 
 #include <linux/clk.h>
 #include <linux/io.h>
+#include <linux/media-bus-format.h>
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
@@ -34,25 +35,31 @@
 
 static int shmob_drm_init_interface(struct shmob_drm_device *sdev)
 {
-	static const u32 ldmt1r[] = {
-		[SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8,
-		[SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9,
-		[SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A,
-		[SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B,
-		[SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16,
-		[SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18,
-		[SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24,
-		[SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR,
+	static const struct {
+		u32 fmt;
+		u32 ldmt1r;
+	} bus_fmts[] = {
+		{ MEDIA_BUS_FMT_RGB888_3X8,	 LDMT1R_MIFTYP_RGB8 },
+		{ MEDIA_BUS_FMT_RGB666_2X9_BE,	 LDMT1R_MIFTYP_RGB9 },
+		{ MEDIA_BUS_FMT_RGB888_2X12_BE,	 LDMT1R_MIFTYP_RGB12A },
+		{ MEDIA_BUS_FMT_RGB444_1X12,	 LDMT1R_MIFTYP_RGB12B },
+		{ MEDIA_BUS_FMT_RGB565_1X16,	 LDMT1R_MIFTYP_RGB16 },
+		{ MEDIA_BUS_FMT_RGB666_1X18,	 LDMT1R_MIFTYP_RGB18 },
+		{ MEDIA_BUS_FMT_RGB888_1X24,	 LDMT1R_MIFTYP_RGB24 },
+		{ MEDIA_BUS_FMT_UYVY8_1X16,	 LDMT1R_MIFTYP_YCBCR },
 	};
+	unsigned int i;
 
-	if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) {
-		dev_err(sdev->dev, "invalid interface type %u\n",
-			sdev->pdata->iface.interface);
-		return -EINVAL;
+	for (i = 0; i < ARRAY_SIZE(bus_fmts); i++) {
+		if (bus_fmts[i].fmt == sdev->pdata->iface.bus_fmt) {
+			sdev->ldmt1r = bus_fmts[i].ldmt1r;
+			return 0;
+		}
 	}
 
-	sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface];
-	return 0;
+	dev_err(sdev->dev, "unsupported bus format 0x%x\n",
+		sdev->pdata->iface.bus_fmt);
+	return -EINVAL;
 }
 
 static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev,

include/linux/platform_data/shmob_drm.h

@@ -18,17 +18,6 @@ enum shmob_drm_clk_source {
 	SHMOB_DRM_CLK_EXTERNAL,
 };
 
-enum shmob_drm_interface {
-	SHMOB_DRM_IFACE_RGB8,		/* 24bpp, 8:8:8 */
-	SHMOB_DRM_IFACE_RGB9,		/* 18bpp, 9:9 */
-	SHMOB_DRM_IFACE_RGB12A,		/* 24bpp, 12:12 */
-	SHMOB_DRM_IFACE_RGB12B,		/* 12bpp */
-	SHMOB_DRM_IFACE_RGB16,		/* 16bpp */
-	SHMOB_DRM_IFACE_RGB18,		/* 18bpp */
-	SHMOB_DRM_IFACE_RGB24,		/* 24bpp */
-	SHMOB_DRM_IFACE_YUV422,		/* 16bpp */
-};
-
 struct shmob_drm_panel_data {
 	unsigned int width_mm;		/* Panel width in mm */
 	unsigned int height_mm;		/* Panel height in mm */
@@ -36,7 +25,7 @@ struct shmob_drm_panel_data {
 };
 
 struct shmob_drm_interface_data {
-	enum shmob_drm_interface interface;
+	unsigned int bus_fmt;		/* MEDIA_BUS_FMT_* */
 	unsigned int clk_div;
 };