drm/panel: st7703: Add Anbernic RG353V-V2 Panel Support

The Anbernic RG353V-V2 is a 5 inch panel used in a new revision of the
Anbernic RG353V handheld gaming device. Add support for it.

Unfortunately it appears this controller is not able to support 120hz
or 100hz mode like the first revision panel.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230426143213.4178586-4-macroalpha82@gmail.com

drivers/gpu/drm/panel/panel-sitronix-st7703.c

@@ -28,6 +28,7 @@
 /* Manufacturer specific Commands send via DSI */
 #define ST7703_CMD_ALL_PIXEL_OFF 0x22
 #define ST7703_CMD_ALL_PIXEL_ON	 0x23
+#define ST7703_CMD_SETAPID	 0xB1
 #define ST7703_CMD_SETDISP	 0xB2
 #define ST7703_CMD_SETRGBIF	 0xB3
 #define ST7703_CMD_SETCYC	 0xB4
@@ -42,11 +43,14 @@
 #define ST7703_CMD_SETSCR	 0xC0
 #define ST7703_CMD_SETPOWER	 0xC1
 #define ST7703_CMD_SETECO	 0xC6
+#define ST7703_CMD_SETIO	 0xC7
+#define ST7703_CMD_SETCABC	 0xC8
 #define ST7703_CMD_SETPANEL	 0xCC
 #define ST7703_CMD_SETGAMMA	 0xE0
 #define ST7703_CMD_SETEQ	 0xE3
 #define ST7703_CMD_SETGIP1	 0xE9
 #define ST7703_CMD_SETGIP2	 0xEA
+#define ST7703_CMD_UNKNOWN_EF	 0xEF
 
 struct st7703 {
 	struct device *dev;
@@ -337,6 +341,98 @@ static const struct st7703_panel_desc xbd599_desc = {
 	.init_sequence = xbd599_init_sequence,
 };
 
+static int rg353v2_init_sequence(struct st7703 *ctx)
+{
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+
+	/*
+	 * Init sequence was supplied by the panel vendor.
+	 */
+
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETEXTC, 0xf1, 0x12, 0x83);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETAPID, 0x00, 0x00, 0x00,
+			       0xda, 0x80);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETDISP, 0x00, 0x13, 0x70);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETRGBIF, 0x10, 0x10, 0x28,
+			       0x28, 0x03, 0xff, 0x00, 0x00, 0x00, 0x00);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETCYC, 0x80);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETBGP, 0x0a, 0x0a);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETVCOM, 0x92, 0x92);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPOWER_EXT, 0x25, 0x22,
+			       0xf0, 0x63);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETMIPI, 0x33, 0x81, 0x05,
+			       0xf9, 0x0e, 0x0e, 0x20, 0x00, 0x00, 0x00, 0x00,
+			       0x00, 0x00, 0x00, 0x44, 0x25, 0x00, 0x90, 0x0a,
+			       0x00, 0x00, 0x01, 0x4f, 0x01, 0x00, 0x00, 0x37);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETVDC, 0x47);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_UNKNOWN_BF, 0x02, 0x11, 0x00);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETSCR, 0x73, 0x73, 0x50, 0x50,
+			       0x00, 0x00, 0x12, 0x50, 0x00);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPOWER, 0x53, 0xc0, 0x32,
+			       0x32, 0x77, 0xe1, 0xdd, 0xdd, 0x77, 0x77, 0x33,
+			       0x33);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETECO, 0x82, 0x00, 0xbf, 0xff,
+			       0x00, 0xff);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETIO, 0xb8, 0x00, 0x0a, 0x00,
+			       0x00, 0x00);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETCABC, 0x10, 0x40, 0x1e,
+			       0x02);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPANEL, 0x0b);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETGAMMA, 0x00, 0x07, 0x0d,
+			       0x37, 0x35, 0x3f, 0x41, 0x44, 0x06, 0x0c, 0x0d,
+			       0x0f, 0x11, 0x10, 0x12, 0x14, 0x1a, 0x00, 0x07,
+			       0x0d, 0x37, 0x35, 0x3f, 0x41, 0x44, 0x06, 0x0c,
+			       0x0d, 0x0f, 0x11, 0x10, 0x12, 0x14, 0x1a);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETEQ, 0x07, 0x07, 0x0b, 0x0b,
+			       0x0b, 0x0b, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00,
+			       0xc0, 0x10);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETGIP1, 0xc8, 0x10, 0x02, 0x00,
+			       0x00, 0xb0, 0xb1, 0x11, 0x31, 0x23, 0x28, 0x80,
+			       0xb0, 0xb1, 0x27, 0x08, 0x00, 0x04, 0x02, 0x00,
+			       0x00, 0x00, 0x00, 0x04, 0x02, 0x00, 0x00, 0x00,
+			       0x88, 0x88, 0xba, 0x60, 0x24, 0x08, 0x88, 0x88,
+			       0x88, 0x88, 0x88, 0x88, 0x88, 0xba, 0x71, 0x35,
+			       0x18, 0x88, 0x88, 0x88, 0x88, 0x88, 0x00, 0x00,
+			       0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			       0x00, 0x00, 0x00);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETGIP2, 0x97, 0x0a, 0x82, 0x02,
+			       0x03, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			       0x81, 0x88, 0xba, 0x17, 0x53, 0x88, 0x88, 0x88,
+			       0x88, 0x88, 0x88, 0x80, 0x88, 0xba, 0x06, 0x42,
+			       0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x23, 0x00,
+			       0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
+			       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			       0x00);
+	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_UNKNOWN_EF, 0xff, 0xff, 0x01);
+
+	return 0;
+}
+
+static const struct drm_display_mode rg353v2_mode = {
+	.hdisplay	= 640,
+	.hsync_start	= 640 + 40,
+	.hsync_end	= 640 + 40 + 2,
+	.htotal		= 640 + 40 + 2 + 80,
+	.vdisplay	= 480,
+	.vsync_start	= 480 + 18,
+	.vsync_end	= 480 + 18 + 2,
+	.vtotal		= 480 + 18 + 2 + 28,
+	.clock		= 24150,
+	.flags		= DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+	.width_mm	= 70,
+	.height_mm	= 57,
+};
+
+static const struct st7703_panel_desc rg353v2_desc = {
+	.mode = &rg353v2_mode,
+	.lanes = 4,
+	.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+		      MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_LPM,
+	.format = MIPI_DSI_FMT_RGB888,
+	.init_sequence = rg353v2_init_sequence,
+};
+
 static int st7703_enable(struct drm_panel *panel)
 {
 	struct st7703 *ctx = panel_to_st7703(panel);
@@ -597,6 +693,7 @@ static void st7703_remove(struct mipi_dsi_device *dsi)
 }
 
 static const struct of_device_id st7703_of_match[] = {
+	{ .compatible = "anbernic,rg353v-panel-v2", .data = &rg353v2_desc },
 	{ .compatible = "rocktech,jh057n00900", .data = &jh057n00900_panel_desc },
 	{ .compatible = "xingbangda,xbd599", .data = &xbd599_desc },
 	{ /* sentinel */ }