drm/panel: simple: Add Ortustech COM37H3M panel support

The change adds support for the Ortustech COM37H3M05DTC/99DTC 3.7" TFT LCD panel.

Tested on Letux3704.
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/43b47034b618cff26cea0484591c6deafb7f0685.1559905870.git.hns@goldelico.com

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

@@ -2182,6 +2182,33 @@ static const struct panel_desc ontat_yx700wv03 = {
 	.bus_format = MEDIA_BUS_FMT_RGB666_1X18,
 };
 
+static const struct drm_display_mode ortustech_com37h3m_mode  = {
+	.clock = 22153,
+	.hdisplay = 480,
+	.hsync_start = 480 + 8,
+	.hsync_end = 480 + 8 + 10,
+	.htotal = 480 + 8 + 10 + 10,
+	.vdisplay = 640,
+	.vsync_start = 640 + 4,
+	.vsync_end = 640 + 4 + 3,
+	.vtotal = 640 + 4 + 3 + 4,
+	.vrefresh = 60,
+	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+};
+
+static const struct panel_desc ortustech_com37h3m = {
+	.modes = &ortustech_com37h3m_mode,
+	.num_modes = 1,
+	.bpc = 8,
+	.size = {
+		.width = 56,	/* 56.16mm */
+		.height = 75,	/* 74.88mm */
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_POSEDGE |
+		     DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE,
+};
+
 static const struct drm_display_mode ortustech_com43h4m85ulc_mode  = {
 	.clock = 25000,
 	.hdisplay = 480,
@@ -3033,6 +3060,12 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "ontat,yx700wv03",
 		.data = &ontat_yx700wv03,
+	}, {
+		.compatible = "ortustech,com37h3m05dtc",
+		.data = &ortustech_com37h3m,
+	}, {
+		.compatible = "ortustech,com37h3m99dtc",
+		.data = &ortustech_com37h3m,
 	}, {
 		.compatible = "ortustech,com43h4m85ulc",
 		.data = &ortustech_com43h4m85ulc,