[PATCH 4/7] drm/panel: sitronix-st7789v: Use platform data

[Miquel Raynal]

The Sitronix ST7789V LCD controller is actually packaged in a number of
different panels with slightly different properties. Before introducing
the support for another pannel using this same LCD controller, let's
move all the panel-specific information into a dedicated structure that
is available as platform data.

There is no functional change.

Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
 .../gpu/drm/panel/panel-sitronix-st7789v.c    | 30 +++++++++++++++----
 1 file changed, 24 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
index 0abb45bea18d..212bccc31804 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
@@ -112,11 +112,19 @@
 			return val;		\
 	} while (0)
 
+struct st7789v_panel_info {
+	const struct drm_display_mode *display_mode;
+	u16 width_mm;
+	u16 height_mm;
+	u32 bus_format;
+};
+
 struct st7789v {
 	struct drm_panel panel;
 	struct spi_device *spi;
 	struct gpio_desc *reset;
 	struct regulator *power;
+	const struct st7789v_panel_info *panel_info;
 };
 
 enum st7789v_prefix {
@@ -170,10 +178,11 @@ static const struct drm_display_mode default_mode = {
 static int st7789v_get_modes(struct drm_panel *panel,
 			     struct drm_connector *connector)
 {
+	struct st7789v *ctx = panel_to_st7789v(panel);
+	const struct st7789v_panel_info *panel_info = ctx->panel_info;
 	struct drm_display_mode *mode;
-	u32 bus_format = MEDIA_BUS_FMT_RGB666_1X18;
 
-	mode = drm_mode_duplicate(connector->dev, &default_mode);
+	mode = drm_mode_duplicate(connector->dev, panel_info->display_mode);
 	if (!mode) {
 		dev_err(panel->dev, "failed to add mode %ux%ux@%u\n",
 			default_mode.hdisplay, default_mode.vdisplay,
@@ -186,10 +195,10 @@ static int st7789v_get_modes(struct drm_panel *panel,
 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
 	drm_mode_probed_add(connector, mode);
 
-	connector->display_info.width_mm = 61;
-	connector->display_info.height_mm = 103;
+	connector->display_info.width_mm = panel_info->width_mm;
+	connector->display_info.height_mm = panel_info->height_mm;
 	drm_display_info_set_bus_formats(&connector->display_info,
-					 &bus_format, 1);
+					 &panel_info->bus_format, 1);
 
 	return 1;
 }
@@ -365,6 +374,8 @@ static int st7789v_probe(struct spi_device *spi)
 	if (!ctx)
 		return -ENOMEM;
 
+	ctx->panel_info = device_get_match_data(&spi->dev);
+
 	spi_set_drvdata(spi, ctx);
 	ctx->spi = spi;
 
@@ -404,8 +415,15 @@ static void st7789v_remove(struct spi_device *spi)
 	drm_panel_remove(&ctx->panel);
 }
 
+static const struct st7789v_panel_info st7789v_info = {
+	.display_mode = &default_mode,
+	.width_mm = 64,
+	.height_mm = 103,
+	.bus_format = MEDIA_BUS_FMT_RGB666_1X18,
+};
+
 static const struct of_device_id st7789v_of_match[] = {
-	{ .compatible = "sitronix,st7789v" },
+	{ .compatible = "sitronix,st7789v", .data = &st7789v_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, st7789v_of_match);
-- 
2.34.1