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 | 137 ++++++++++++++++++
1 file changed, 137 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
index a62a2f5737e4..90f70eb84f11 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
@@ -10,6 +10,7 @@
#include <linux/spi/spi.h>
#include <video/mipi_display.h>
+#include <linux/media-bus-format.h>
#include <drm/drm_device.h>
#include <drm/drm_modes.h>
@@ -113,6 +114,8 @@ struct st7789v;
struct st7789_panel_info {
const struct drm_display_mode *mode;
int (*init_sequence)(struct st7789v *ctx);
+ unsigned int bpc;
+ u32 bus_format;
};
struct st7789v {
@@ -174,6 +177,20 @@ static const struct drm_display_mode default_mode = {
.height_mm = 103,
};
+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,
+};
+
static int init_sequence_default(struct st7789v *ctx) {
int ret;
@@ -283,11 +300,125 @@ static int init_sequence_default(struct st7789v *ctx) {
return 0;
}
+static int init_sequence_t28cp45tn89(struct st7789v *ctx) {
+ int ret;
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx,
+ MIPI_DCS_SET_ADDRESS_MODE));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, 0));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx,
+ MIPI_DCS_SET_PIXEL_FORMAT));
+ ST7789V_TEST(ret, st7789v_write_data(ctx,
+ (MIPI_DCS_PIXEL_FMT_16BIT << 4) |
+ (MIPI_DCS_PIXEL_FMT_16BIT)));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_PORCTRL_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, 0xc));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, 0xc));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, 0));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PORCTRL_IDLE_BP(3) |
+ ST7789V_PORCTRL_IDLE_FP(3)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx,
+ ST7789V_PORCTRL_PARTIAL_BP(3) |
+ ST7789V_PORCTRL_PARTIAL_FP(3)));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_GCTRL_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_GCTRL_VGLS(5) |
+ ST7789V_GCTRL_VGHS(3)));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VCOMS_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, 0x2b));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_LCMCTRL_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_LCMCTRL_XMH |
+ ST7789V_LCMCTRL_XMX |
+ ST7789V_LCMCTRL_XBGR));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VDVVRHEN_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_VDVVRHEN_CMDEN));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VRHS_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, 0xf));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VDVS_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, 0x20));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_FRCTRL2_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, 0xf));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_PWCTRL1_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PWCTRL1_MAGIC));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PWCTRL1_AVDD(2) |
+ ST7789V_PWCTRL1_AVCL(2) |
+ ST7789V_PWCTRL1_VDS(1)));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_PVGAMCTRL_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP63(0xd)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP1(0xca)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP2(0xe)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP4(8)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP6(9)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP13(7)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP20(0x2d)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP27(0xb) |
+ ST7789V_PVGAMCTRL_VP36(3)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP43(0x3d)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_JP1(3) |
+ ST7789V_PVGAMCTRL_VP50(4)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP57(0xa)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP59(0xa)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP61(0x1b)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP62(0x28)));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_NVGAMCTRL_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN63(0xd)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN1(0xca)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN2(0xf)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN4(8)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN6(8)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN13(7)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN20(0x2e)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN27(0xc) |
+ ST7789V_NVGAMCTRL_VN36(5)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN43(0x40)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_JN1(3) |
+ ST7789V_NVGAMCTRL_VN50(4)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN57(9)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN59(0xb)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN61(0x1b)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN62(0x28)));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, MIPI_DCS_EXIT_INVERT_MODE));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_RAMCTRL_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RAMCTRL_DM_RGB |
+ ST7789V_RAMCTRL_RM_RGB));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RAMCTRL_EPF(3) |
+ ST7789V_RAMCTRL_MAGIC));
+
+ ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_RGBCTRL_CMD));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RGBCTRL_WO |
+ ST7789V_RGBCTRL_RCM(2) |
+ ST7789V_RGBCTRL_VSYNC_HIGH));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RGBCTRL_VBP(8)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RGBCTRL_HBP(20)));
+
+ return 0;
+}
+
struct st7789_panel_info default_panel = {
.mode = &default_mode,
.init_sequence = init_sequence_default,
};
+struct st7789_panel_info t28cp45tn89_panel = {
+ .mode = &t28cp45tn89_mode,
+ .init_sequence = init_sequence_t28cp45tn89,
+ .bpc = 6,
+ .bus_format = MEDIA_BUS_FMT_RGB565_1X16,
+};
+
static int st7789v_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
@@ -307,8 +438,12 @@ static int st7789v_get_modes(struct drm_panel *panel,
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
+ connector->display_info.bpc = ctx->info->bpc;
connector->display_info.width_mm = ctx->info->mode->width_mm;
connector->display_info.height_mm = ctx->info->mode->height_mm;
+ if (ctx->info->bus_format)
+ drm_display_info_set_bus_formats(&connector->display_info,
+ &ctx->info->bus_format, 1);
return 1;
}
@@ -417,12 +552,14 @@ 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
