drm/panel: simple: add support for Rocktech RK043FN48H panel

Add support for Rocktech RK043FN48H 4.3" (480x272) LCD-TFT panel.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306020343.jNTWeM0P-lkp@intel.com/
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230607063139.621351-6-dario.binacchi@amarulasolutions.com

Author: passgat

drivers/gpu/drm/panel/panel-simple.c

@@ -3281,6 +3281,32 @@ static const struct panel_desc qishenglong_gopher2b_lcd = {
 	.connector_type = DRM_MODE_CONNECTOR_DPI,
 };
 
+static const struct display_timing rocktech_rk043fn48h_timing = {
+	.pixelclock = { 6000000, 9000000, 12000000 },
+	.hactive = { 480, 480, 480 },
+	.hback_porch = { 8, 43, 43 },
+	.hfront_porch = { 2, 8, 8 },
+	.hsync_len = { 1, 1, 1 },
+	.vactive = { 272, 272, 272 },
+	.vback_porch = { 2, 12, 12 },
+	.vfront_porch = { 1, 4, 4 },
+	.vsync_len = { 1, 10, 10 },
+	.flags = DISPLAY_FLAGS_VSYNC_LOW | DISPLAY_FLAGS_HSYNC_LOW |
+		 DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE,
+};
+
+static const struct panel_desc rocktech_rk043fn48h = {
+	.timings = &rocktech_rk043fn48h_timing,
+	.num_timings = 1,
+	.bpc = 8,
+	.size = {
+		.width = 95,
+		.height = 54,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.connector_type = DRM_MODE_CONNECTOR_DPI,
+};
+
 static const struct display_timing rocktech_rk070er9427_timing = {
 	.pixelclock = { 26400000, 33300000, 46800000 },
 	.hactive = { 800, 800, 800 },
@@ -4320,6 +4346,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "qishenglong,gopher2b-lcd",
 		.data = &qishenglong_gopher2b_lcd,
+	}, {
+		.compatible = "rocktech,rk043fn48h",
+		.data = &rocktech_rk043fn48h,
 	}, {
 		.compatible = "rocktech,rk070er9427",
 		.data = &rocktech_rk070er9427,