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: Langyan Ye <[email protected]>
---
drivers/gpu/drm/panel/panel-ilitek-ili9882t.c | 69 +++++++++++++++++++
1 file changed, 69 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
index 85c7059be214..c52f20863fc7 100644
--- a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
@@ -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);
