diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 90296090340e..07d576d99475 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -2424,6 +2424,33 @@ static const struct panel_desc winstar_wf35ltiacd = {
 	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
 };
 
+static const struct drm_display_mode arm_rtsm_mode[] = {
+	{
+		.clock = 65000,
+		.hdisplay = 1024,
+		.hsync_start = 1024 + 24,
+		.hsync_end = 1024 + 24 + 136,
+		.htotal = 1024 + 24 + 136 + 160,
+		.vdisplay = 768,
+		.vsync_start = 768 + 3,
+		.vsync_end = 768 + 3 + 6,
+		.vtotal = 768 + 3 + 6 + 29,
+		.vrefresh = 60,
+		.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+	},
+};
+
+static const struct panel_desc arm_rtsm = {
+	.modes = arm_rtsm_mode,
+	.num_modes = 1,
+	.bpc = 8,
+	.size = {
+		.width = 400,
+		.height = 300,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+};
+
 static const struct of_device_id platform_of_match[] = {
 	{
 		.compatible = "ampire,am-480272h3tmqw-t01h",
@@ -2431,6 +2458,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "ampire,am800480r3tmqwa1h",
 		.data = &ampire_am800480r3tmqwa1h,
+	}, {
+		.compatible = "arm,rtsm-display",
+		.data = &arm_rtsm,
 	}, {
 		.compatible = "auo,b101aw03",
 		.data = &auo_b101aw03,