Commit 2b1ffe04 authored by Langyan Ye's avatar Langyan Ye Committed by Neil Armstrong
Browse files

drm/panel: ilitek-ili9882t: Add support for Ilitek IL79900A-based panels 



The Ilitek IL79900A display controller is similar to the ILI9882T and can
be supported within the existing `panel-ilitek-ili9882t.c` driver.

This patch extends the ILI9882T driver to handle IL79900A-based panels,
such as the Tianma TL121BVMS07-00. The IL79900A uses a similar command
sequence and initialization flow, with minor differences in power supply
configuration and timing.

Signed-off-by: default avatarLangyan Ye <yelangyan@huaqin.corp-partner.google.com>
Reviewed-by: default avatarNeil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: default avatarNeil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20251031100447.253164-3-yelangyan@huaqin.corp-partner.google.com
parent e147c472

drivers/gpu/drm/panel/panel-ilitek-ili9882t.c

+69 −0
Original line number Diff line number Diff line
@@ -61,6 +61,13 @@ struct ili9882t { 
	mipi_dsi_dcs_write_seq_multi(ctx, ILI9882T_DCS_SWITCH_PAGE, \

				     0x98, 0x82, (page))



/* IL79900A-specific commands, add new commands as you decode them */

#define IL79900A_DCS_SWITCH_PAGE	0xFF



#define il79900a_switch_page(ctx, page) \

	mipi_dsi_dcs_write_seq_multi(ctx, IL79900A_DCS_SWITCH_PAGE, \

				     0x5a, 0xa5, (page))



static int starry_ili9882t_init(struct ili9882t *ili)

{

	struct mipi_dsi_multi_context ctx = { .dsi = ili->dsi };
@@ -413,6 +420,38 @@ static int starry_ili9882t_init(struct ili9882t *ili) 
	return ctx.accum_err;

};



static int tianma_il79900a_init(struct ili9882t *ili)

{

	struct mipi_dsi_multi_context ctx = { .dsi = ili->dsi };



	mipi_dsi_usleep_range(&ctx, 5000, 5100);



	il79900a_switch_page(&ctx, 0x06);

	mipi_dsi_dcs_write_seq_multi(&ctx, 0x3e, 0x62);



	il79900a_switch_page(&ctx, 0x02);

	mipi_dsi_dcs_write_seq_multi(&ctx, 0x1b, 0x20);

	mipi_dsi_dcs_write_seq_multi(&ctx, 0x5d, 0x00);

	mipi_dsi_dcs_write_seq_multi(&ctx, 0x5e, 0x40);



	il79900a_switch_page(&ctx, 0x07);

	mipi_dsi_dcs_write_seq_multi(&ctx, 0X29, 0x00);



	il79900a_switch_page(&ctx, 0x06);

	mipi_dsi_dcs_write_seq_multi(&ctx, 0x92, 0x22);



	il79900a_switch_page(&ctx, 0x00);

	mipi_dsi_dcs_exit_sleep_mode_multi(&ctx);



	mipi_dsi_msleep(&ctx, 120);



	mipi_dsi_dcs_set_display_on_multi(&ctx);



	mipi_dsi_msleep(&ctx, 80);



	return 0;

};



static inline struct ili9882t *to_ili9882t(struct drm_panel *panel)

{

	return container_of(panel, struct ili9882t, base);
@@ -529,6 +568,19 @@ static const struct drm_display_mode starry_ili9882t_default_mode = { 
	.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,

};



static const struct drm_display_mode tianma_il79900a_default_mode = {

	.clock = 264355,

	.hdisplay = 1600,

	.hsync_start = 1600 + 20,

	.hsync_end = 1600 + 20 + 4,

	.htotal = 1600 + 20 + 4 + 20,

	.vdisplay = 2560,

	.vsync_start = 2560 + 82,

	.vsync_end = 2560 + 82 + 2,

	.vtotal = 2560 + 82 + 2 + 36,

	.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,

};



static const struct panel_desc starry_ili9882t_desc = {

	.modes = &starry_ili9882t_default_mode,

	.bpc = 8,
@@ -543,6 +595,20 @@ static const struct panel_desc starry_ili9882t_desc = { 
	.init = starry_ili9882t_init,

};



static const struct panel_desc tianma_tl121bvms07_desc = {

	.modes = &tianma_il79900a_default_mode,

	.bpc = 8,

	.size = {

		.width_mm = 163,

		.height_mm = 260,

	},

	.lanes = 3,

	.format = MIPI_DSI_FMT_RGB888,

	.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |

		      MIPI_DSI_MODE_LPM,

	.init = tianma_il79900a_init,

};



static int ili9882t_get_modes(struct drm_panel *panel,

			      struct drm_connector *connector)

{
@@ -680,6 +746,9 @@ static const struct of_device_id ili9882t_of_match[] = { 
	{ .compatible = "starry,ili9882t",

	  .data = &starry_ili9882t_desc

	},

	{ .compatible = "tianma,tl121bvms07-00",

	  .data = &tianma_tl121bvms07_desc

	},

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(of, ili9882t_of_match);