drm/panel: Add display timing for Okaya RS800480T-7X0GP

Add support for the Okaya RS800480T-7X0GP to the DRM simple panel
driver.

The RS800480T-7X0GP is a WVGA (800x480) panel with an 18-bit parallel
LCD interface. It supports pixel clocks in the range of 30-40 MHz.

This panel details can be found at:
http://boundarydevices.com/product/7-800x480-display/

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Documentation/devicetree/bindings/panel/okaya,rs800480t-7x0gp.txt

@@ -0,0 +1,7 @@
+OKAYA Electric America, Inc. RS800480T-7X0GP 7" WVGA LCD panel
+
+Required properties:
+- compatible: should be "okaya,rs800480t-7x0gp"
+
+This binding is compatible with the simple-panel binding, which is specified
+in simple-panel.txt in this directory.

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

@@ -973,6 +973,36 @@ static const struct panel_desc nec_nl4827hc19_05b = {
 	.bus_format = MEDIA_BUS_FMT_RGB888_1X24
 };
 
+static const struct display_timing okaya_rs800480t_7x0gp_timing = {
+	.pixelclock = { 30000000, 30000000, 40000000 },
+	.hactive = { 800, 800, 800 },
+	.hfront_porch = { 40, 40, 40 },
+	.hback_porch = { 40, 40, 40 },
+	.hsync_len = { 1, 48, 48 },
+	.vactive = { 480, 480, 480 },
+	.vfront_porch = { 13, 13, 13 },
+	.vback_porch = { 29, 29, 29 },
+	.vsync_len = { 3, 3, 3 },
+	.flags = DISPLAY_FLAGS_DE_HIGH,
+};
+
+static const struct panel_desc okaya_rs800480t_7x0gp = {
+	.timings = &okaya_rs800480t_7x0gp_timing,
+	.num_timings = 1,
+	.bpc = 6,
+	.size = {
+		.width = 154,
+		.height = 87,
+	},
+	.delay = {
+		.prepare = 41,
+		.enable = 50,
+		.unprepare = 41,
+		.disable = 50,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB666_1X18,
+};
+
 static const struct drm_display_mode ortustech_com43h4m85ulc_mode  = {
 	.clock = 25000,
 	.hdisplay = 480,
@@ -1145,6 +1175,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "nec,nl4827hc19-05b",
 		.data = &nec_nl4827hc19_05b,
+	}, {
+		.compatible = "okaya,rs800480t-7x0gp",
+		.data = &okaya_rs800480t_7x0gp,
 	}, {
 		.compatible = "ortustech,com43h4m85ulc",
 		.data = &ortustech_com43h4m85ulc,