UNI-T UTi260b has a Inanbo T28CP45TN89 v17 panel. I could not find
proper documentation for the panel apart from a technical drawing, but
according to the vendor U-Boot it is based on a Sitronix st7789v chip.
I generated the init sequence by modifying the default one until proper
graphics output has been seen on the device.
Signed-off-by: Sebastian Reichel <sre@xxxxxxxxxx>
---
.../gpu/drm/panel/panel-sitronix-st7789v.c | 25 +++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
index f3b1bf7ef996..172c6c1fc090 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
@@ -173,6 +173,21 @@ static const struct drm_display_mode default_mode = {
.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
};
+static const struct drm_display_mode t28cp45tn89_mode = {
+ .clock = 6008,
+ .hdisplay = 240,
+ .hsync_start = 240 + 38,
+ .hsync_end = 240 + 38 + 10,
+ .htotal = 240 + 38 + 10 + 10,
+ .vdisplay = 320,
+ .vsync_start = 320 + 8,
+ .vsync_end = 320 + 8 + 4,
+ .vtotal = 320 + 8 + 4 + 4,
+ .width_mm = 43,
+ .height_mm = 57,
+ .flags = DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC,
+};
+
struct st7789_panel_info default_panel = {
.mode = &default_mode,
.invert_mode = true,
@@ -181,6 +196,14 @@ struct st7789_panel_info default_panel = {
DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE,
};
+struct st7789_panel_info t28cp45tn89_panel = {
+ .mode = &t28cp45tn89_mode,
+ .invert_mode = false,
+ .bus_format = MEDIA_BUS_FMT_RGB565_1X16,
+ .bus_flags = DRM_BUS_FLAG_DE_HIGH |
+ DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE,
+};
+
static int st7789v_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
@@ -446,12 +469,14 @@ static void st7789v_remove(struct spi_device *spi)
static const struct spi_device_id st7789v_spi_id[] = {
{ "st7789v", (unsigned long) &default_panel },
+ { "t28cp45tn89-v17", (unsigned long) &t28cp45tn89_panel },
{ }
};
MODULE_DEVICE_TABLE(spi, st7789v_spi_id);
static const struct of_device_id st7789v_of_match[] = {
{ .compatible = "sitronix,st7789v", .data = &default_panel },
+ { .compatible = "inanbo,t28cp45tn89-v17", .data = &t28cp45tn89_panel },
{ }
};
MODULE_DEVICE_TABLE(of, st7789v_of_match);
--
2.39.2
