[PATCH 3/5] drm/panel: st7703: Add GameForce Chi Panel Support

[Jessica Zhang]

On 3/25/2024 6:49 AM, Chris Morgan wrote:
> From: Chris Morgan <macromorgan at hotmail.com>
> 
> The GameForce Chi is a handheld device with a 3.5" 640x480 ST7703 based
> display panel.
> 

Hi Chris,

Acked-by: Jessica Zhang <quic_jesszhan at quicinc.com>

Thanks,

Jessica Zhang

> Signed-off-by: Chris Morgan <macromorgan at hotmail.com>
> ---
>   drivers/gpu/drm/panel/panel-sitronix-st7703.c | 87 +++++++++++++++++++
>   1 file changed, 87 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
> index a3e142f156d5..7d8302cca091 100644
> --- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c
> +++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
> @@ -612,6 +612,92 @@ static const struct st7703_panel_desc rgb10max3_panel_desc = {
>   	.init_sequence = rgb10max3_panel_init_sequence,
>   };
>   
> +static int gameforcechi_init_sequence(struct st7703 *ctx)
> +{
> +	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +
> +	/*
> +	 * Init sequence was supplied by the panel vendor. Panel will not
> +	 * respond to commands until it is brought out of sleep mode first.
> +	 */
> +
> +	mipi_dsi_dcs_exit_sleep_mode(dsi);
> +	msleep(250);
> +
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETEXTC, 0xf1, 0x12, 0x83);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETMIPI, 0x31, 0x81, 0x05, 0xf9,
> +			       0x0e, 0x0e, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00,
> +			       0x00, 0x00, 0x44, 0x25, 0x00, 0x91, 0x0a, 0x00,
> +			       0x00, 0x02, 0x4f, 0xd1, 0x00, 0x00, 0x37);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPOWER_EXT, 0x25);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_UNKNOWN_BF, 0x02, 0x11, 0x00);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETRGBIF, 0x0c, 0x10, 0x0a,
> +			       0x50, 0x03, 0xff, 0x00, 0x00, 0x00, 0x00);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETSCR, 0x73, 0x73, 0x50, 0x50,
> +			       0x00, 0x00, 0x08, 0x70, 0x00);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETVDC, 0x46);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPANEL, 0x0b);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETCYC, 0x80);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETDISP, 0x00, 0x13, 0xf0);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETEQ, 0x07, 0x07, 0x0b, 0x0b,
> +			       0x03, 0x0b, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00,
> +			       0xc0, 0x10);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPOWER, 0x53, 0x00, 0x1e,
> +			       0x1e, 0x77, 0xe1, 0xcc, 0xdd, 0x67, 0x77, 0x33,
> +			       0x33);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETBGP, 0x10, 0x10);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETVCOM, 0x6c, 0x7c);
> +	mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETGIP1, 0x08, 0x00, 0x0e, 0x00,
> +			       0x00, 0xb0, 0xb1, 0x11, 0x31, 0x23, 0x28, 0x10,
> +			       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,
> +			       0x13, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> +			       0x80, 0x88, 0xba, 0x17, 0x53, 0x88, 0x88, 0x88,
> +			       0x88, 0x88, 0x88, 0x81, 0x88, 0xba, 0x06, 0x42,
> +			       0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x23, 0x10,
> +			       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_SETGAMMA, 0x00, 0x07, 0x0b,
> +			       0x27, 0x2d, 0x3f, 0x3b, 0x37, 0x05, 0x0a, 0x0b,
> +			       0x0f, 0x11, 0x0f, 0x12, 0x12, 0x18, 0x00, 0x07,
> +			       0x0b, 0x27, 0x2d, 0x3f, 0x3b, 0x37, 0x05, 0xa0,
> +			       0x0b, 0x0f, 0x11, 0x0f, 0x12, 0x12, 0x18);
> +
> +	return 0;
> +}
> +
> +static const struct drm_display_mode gameforcechi_mode = {
> +	.hdisplay	= 640,
> +	.hsync_start	= 640 + 40,
> +	.hsync_end	= 640 + 40 + 2,
> +	.htotal		= 640 + 40 + 2 + 80,
> +	.vdisplay	= 480,
> +	.vsync_start	= 480 + 17,
> +	.vsync_end	= 480 + 17 + 5,
> +	.vtotal		= 480 + 17 + 5 + 13,
> +	.clock		= 23546,
> +	.flags		= DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
> +	.width_mm	= 71,
> +	.height_mm	= 53,
> +};
> +
> +static const struct st7703_panel_desc gameforcechi_desc = {
> +	.mode = &gameforcechi_mode,
> +	.lanes = 2,
> +	.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 = gameforcechi_init_sequence,
> +};
> +
>   static int st7703_enable(struct drm_panel *panel)
>   {
>   	struct st7703 *ctx = panel_to_st7703(panel);
> @@ -887,6 +973,7 @@ 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 = "gameforce,chi-panel", .data = &gameforcechi_desc },
>   	{ .compatible = "powkiddy,rgb10max3-panel", .data = &rgb10max3_panel_desc },
>   	{ .compatible = "powkiddy,rgb30-panel", .data = &rgb30panel_desc },
>   	{ .compatible = "rocktech,jh057n00900", .data = &jh057n00900_panel_desc },
> -- 
> 2.34.1
>