drm: exynos: dsi: Introduce hw_type platform data

Samsung MIPI DSIM controller is common DSI IP that can be used
in various SoCs like Exynos, i.MX8M Mini/Nano/Plus.

Add hw_type enum via platform_data so that accessing the different
controller data between various platforms becomes easy and meaningful.
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_drm_dsi.c

@@ -254,6 +254,15 @@ struct exynos_dsi_transfer {
 #define DSIM_STATE_CMD_LPM		BIT(2)
 #define DSIM_STATE_VIDOUT_AVAILABLE	BIT(3)
 
+enum exynos_dsi_type {
+	DSIM_TYPE_EXYNOS3250,
+	DSIM_TYPE_EXYNOS4210,
+	DSIM_TYPE_EXYNOS5410,
+	DSIM_TYPE_EXYNOS5422,
+	DSIM_TYPE_EXYNOS5433,
+	DSIM_TYPE_COUNT,
+};
+
 struct exynos_dsi_driver_data {
 	const unsigned int *reg_ofs;
 	unsigned int plltmr_reg;
@@ -267,6 +276,10 @@ struct exynos_dsi_driver_data {
 	const unsigned int *reg_values;
 };
 
+struct exynos_dsi_plat_data {
+	enum exynos_dsi_type hw_type;
+};
+
 struct exynos_dsi {
 	struct drm_encoder encoder;
 	struct mipi_dsi_host dsi_host;
@@ -297,6 +310,7 @@ struct exynos_dsi {
 	struct list_head transfer_list;
 
 	const struct exynos_dsi_driver_data *driver_data;
+	const struct exynos_dsi_plat_data *plat_data;
 };
 
 #define host_to_dsi(host) container_of(host, struct exynos_dsi, dsi_host)
@@ -524,18 +538,13 @@ static const struct exynos_dsi_driver_data exynos5422_dsi_driver_data = {
 	.reg_values = exynos5422_reg_values,
 };
 
-static const struct of_device_id exynos_dsi_of_match[] = {
-	{ .compatible = "samsung,exynos3250-mipi-dsi",
-	  .data = &exynos3_dsi_driver_data },
-	{ .compatible = "samsung,exynos4210-mipi-dsi",
-	  .data = &exynos4_dsi_driver_data },
-	{ .compatible = "samsung,exynos5410-mipi-dsi",
-	  .data = &exynos5_dsi_driver_data },
-	{ .compatible = "samsung,exynos5422-mipi-dsi",
-	  .data = &exynos5422_dsi_driver_data },
-	{ .compatible = "samsung,exynos5433-mipi-dsi",
-	  .data = &exynos5433_dsi_driver_data },
-	{ }
+static const struct exynos_dsi_driver_data *
+exynos_dsi_types[DSIM_TYPE_COUNT] = {
+	[DSIM_TYPE_EXYNOS3250] = &exynos3_dsi_driver_data,
+	[DSIM_TYPE_EXYNOS4210] = &exynos4_dsi_driver_data,
+	[DSIM_TYPE_EXYNOS5410] = &exynos5_dsi_driver_data,
+	[DSIM_TYPE_EXYNOS5422] = &exynos5422_dsi_driver_data,
+	[DSIM_TYPE_EXYNOS5433] = &exynos5433_dsi_driver_data,
 };
 
 static void exynos_dsi_wait_for_reset(struct exynos_dsi *dsi)
@@ -1468,8 +1477,6 @@ static const struct drm_bridge_funcs exynos_dsi_bridge_funcs = {
 	.attach				= exynos_dsi_attach,
 };
 
-MODULE_DEVICE_TABLE(of, exynos_dsi_of_match);
-
 static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
 				  struct mipi_dsi_device *device)
 {
@@ -1704,7 +1711,8 @@ static int exynos_dsi_probe(struct platform_device *pdev)
 	dsi->dsi_host.dev = dev;
 
 	dsi->dev = dev;
-	dsi->driver_data = of_device_get_match_data(dev);
+	dsi->plat_data = of_device_get_match_data(dev);
+	dsi->driver_data = exynos_dsi_types[dsi->plat_data->hw_type];
 
 	dsi->supplies[0].supply = "vddcore";
 	dsi->supplies[1].supply = "vddio";
@@ -1862,6 +1870,51 @@ static const struct dev_pm_ops exynos_dsi_pm_ops = {
 				pm_runtime_force_resume)
 };
 
+static const struct exynos_dsi_plat_data exynos3250_dsi_pdata = {
+	.hw_type = DSIM_TYPE_EXYNOS3250,
+};
+
+static const struct exynos_dsi_plat_data exynos4210_dsi_pdata = {
+	.hw_type = DSIM_TYPE_EXYNOS4210,
+};
+
+static const struct exynos_dsi_plat_data exynos5410_dsi_pdata = {
+	.hw_type = DSIM_TYPE_EXYNOS5410,
+};
+
+static const struct exynos_dsi_plat_data exynos5422_dsi_pdata = {
+	.hw_type = DSIM_TYPE_EXYNOS5422,
+};
+
+static const struct exynos_dsi_plat_data exynos5433_dsi_pdata = {
+	.hw_type = DSIM_TYPE_EXYNOS5433,
+};
+
+static const struct of_device_id exynos_dsi_of_match[] = {
+	{
+		.compatible = "samsung,exynos3250-mipi-dsi",
+		.data = &exynos3250_dsi_pdata,
+	},
+	{
+		.compatible = "samsung,exynos4210-mipi-dsi",
+		.data = &exynos4210_dsi_pdata,
+	},
+	{
+		.compatible = "samsung,exynos5410-mipi-dsi",
+		.data = &exynos5410_dsi_pdata,
+	},
+	{
+		.compatible = "samsung,exynos5422-mipi-dsi",
+		.data = &exynos5422_dsi_pdata,
+	},
+	{
+		.compatible = "samsung,exynos5433-mipi-dsi",
+		.data = &exynos5433_dsi_pdata,
+	},
+	{ /* sentinel. */ }
+};
+MODULE_DEVICE_TABLE(of, exynos_dsi_of_match);
+
 struct platform_driver dsi_driver = {
 	.probe = exynos_dsi_probe,
 	.remove = exynos_dsi_remove,