+};
+
+static const struct ili9805_instr gpm1780a0_init[] = {
+ ILI9805_INSTR(100, ILI9805_EXTCMD_CMD_SET_ENABLE_REG, ILI9805_SETEXTC_PARAMETER1,
+ ILI9805_SETEXTC_PARAMETER2, ILI9805_SETEXTC_PARAMETER3),
+ ILI9805_INSTR(100, 0xFD, 0x0F, 0x10, 0x44, 0x00),
+ ILI9805_INSTR(0, 0xf8, 0x18, 0x02, 0x02, 0x18, 0x02, 0x02, 0x30, 0x00,
+ 0x00, 0x30, 0x00, 0x00, 0x30, 0x00, 0x00),
+ ILI9805_INSTR(0, 0xB8, 0x62),
+ ILI9805_INSTR(0, 0xF1, 0x00),
+ ILI9805_INSTR(0, 0xF2, 0x00, 0x58, 0x40),
+ ILI9805_INSTR(0, 0xF3, 0x60, 0x83, 0x04),
+ ILI9805_INSTR(0, 0xFC, 0x04, 0x0F, 0x01),
+ ILI9805_INSTR(0, 0xEB, 0x08, 0x0F),
+ ILI9805_INSTR(0, 0xe0, 0x00, 0x08, 0x0d, 0x0e, 0x0e, 0x0d, 0x0a, 0x08, 0x04,
+ 0x08, 0x0d, 0x0f, 0x0b, 0x1c, 0x14, 0x0a),
+ ILI9805_INSTR(0, 0xe1, 0x00, 0x08, 0x0d, 0x0e, 0x0e, 0x0d, 0x0a, 0x08, 0x04,
+ 0x08, 0x0d, 0x0f, 0x0b, 0x1c, 0x14, 0x0a),
+ ILI9805_INSTR(10, 0xc1, 0x13, 0x39, 0x19, 0x06),
+ ILI9805_INSTR(10, 0xc7, 0xe5),
+ ILI9805_INSTR(10, 0xB1, 0x00, 0x12, 0x14),
+ ILI9805_INSTR(10, 0xB4, 0x02),
+ ILI9805_INSTR(0, 0xBB, 0x14, 0x55),
+ ILI9805_INSTR(0, MIPI_DCS_SET_ADDRESS_MODE, 0x08),
+ ILI9805_INSTR(0, MIPI_DCS_SET_PIXEL_FORMAT, 0x77),
+ ILI9805_INSTR(0, 0x20),
+ ILI9805_INSTR(0, 0xB0, 0x01),
+ ILI9805_INSTR(0, 0xB6, 0x31, 0x00, 0xef),
+ ILI9805_INSTR(0, 0xDF, 0x23),
+ ILI9805_INSTR(0, 0xB9, 0x02, 0x00),
+};
+
+static inline struct ili9805 *panel_to_ili9805(struct drm_panel *panel)
+{
+ return container_of(panel, struct ili9805, panel);
+}
+
+static int ili9805_power_on(struct ili9805 *ctx)
+{
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ ret = regulator_enable(ctx->avdd);
+ if (ret) {
+ dev_err(dev, "Failed to enable avdd regulator (%d)\n", ret);
+ return ret;
+ }
+
+ ret = regulator_enable(ctx->dvdd);
+ if (ret) {
+ dev_err(dev, "Failed to enable dvdd regulator (%d)\n", ret);
+ regulator_disable(ctx->avdd);
+ return ret;
+ }
+
+ gpiod_set_value(ctx->reset_gpio, 0);
+ usleep_range(5000, 10000);
+ gpiod_set_value(ctx->reset_gpio, 1);
+ msleep(120);
+
+ return 0;
+}
+
+static int ili9805_power_off(struct ili9805 *ctx)
+{
+ gpiod_set_value(ctx->reset_gpio, 0);
+ regulator_disable(ctx->dvdd);
+ regulator_disable(ctx->avdd);
+
+ return 0;
+}
+
+static int ili9805_activate(struct ili9805 *ctx)
+{
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct device *dev = &dsi->dev;
+ int i, ret;
+
+ for (i = 0; i < ctx->desc->init_length; i++) {
+ const struct ili9805_instr *instr = &ctx->desc->init[i];
+
+ ret = mipi_dsi_dcs_write_buffer(ctx->dsi, instr->data, instr->len);
+ if (ret < 0)
+ return ret;
+
+ if (instr->delay > 0)
+ msleep(instr->delay);
+ }
+
+ ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
+ if (ret) {
+ dev_err(dev, "Failed to exit sleep mode (%d)\n", ret);
+ return ret;
+ }
+
+ usleep_range(5000, 6000);
+
+ ret = mipi_dsi_dcs_set_display_on(ctx->dsi);
+ if (ret) {
+ dev_err(dev, "Failed to set display ON (%d)\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ili9805_prepare(struct drm_panel *panel)
+{
+ struct ili9805 *ctx = panel_to_ili9805(panel);
+ int ret;
+
+ if (ctx->prepared)
+ return 0;
+
+ ret = ili9805_power_on(ctx);
+ if (ret)
+ return ret;
+
+ ret = ili9805_activate(ctx);
+ if (ret) {
+ ili9805_power_off(ctx);
+ return ret;
+ }
+
+ ctx->prepared = true;
+
+ return 0;
+}
+
+static int ili9805_deactivate(struct ili9805 *ctx)
+{
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ ret = mipi_dsi_dcs_set_display_off(ctx->dsi);
+ if (ret < 0) {
+ dev_err(dev, "Failed to set display OFF (%d)\n", ret);
+ return ret;
+ }
+
+ usleep_range(5000, 10000);
+
+ ret = mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enter sleep mode (%d)\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ili9805_unprepare(struct drm_panel *panel)
+{
+ struct ili9805 *ctx = panel_to_ili9805(panel);
+
+ if (!ctx->prepared)
+ return 0;
+
+ ili9805_deactivate(ctx);
+ ili9805_power_off(ctx);
+
+ ctx->prepared = false;
+
+ return 0;
+}
+
+static const struct drm_display_mode gpm1780a0_timing = {
+ .clock = 26227,
+
+ .hdisplay = 480,
+ .hsync_start = 480 + 10,
+ .hsync_end = 480 + 10 + 2,
+ .htotal = 480 + 10 + 2 + 36,
+
+ .vdisplay = 480,
+ .vsync_start = 480 + 2,
+ .vsync_end = 480 + 10 + 4,
+ .vtotal = 480 + 2 + 4 + 10,
+};
+
+static int ili9805_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ struct ili9805 *ctx = panel_to_ili9805(panel);
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_duplicate(connector->dev, ctx->desc->mode);
+ if (!mode) {
+ dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n",
+ ctx->desc->mode->hdisplay,
+ ctx->desc->mode->vdisplay,
+ drm_mode_vrefresh(ctx->desc->mode));
+ return -ENOMEM;
+ }
+
+ drm_mode_set_name(mode);
+
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+ drm_mode_probed_add(connector, mode);
+
+ connector->display_info.width_mm = mode->width_mm;
+ connector->display_info.height_mm = mode->height_mm;
+
+ return 1;
+}
+
+static const struct drm_panel_funcs ili9805_funcs = {
+ .prepare = ili9805_prepare,
+ .unprepare = ili9805_unprepare,
+ .get_modes = ili9805_get_modes,
+};
+
+static int ili9805_dsi_probe(struct mipi_dsi_device *dsi)
+{
+ struct ili9805 *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+ mipi_dsi_set_drvdata(dsi, ctx);
+ ctx->dsi = dsi;
+ ctx->desc = of_device_get_match_data(&dsi->dev);
+
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM |
+ MIPI_DSI_MODE_VIDEO_SYNC_PULSE | MIPI_DSI_MODE_NO_EOT_PACKET;
+ dsi->lanes = 2;
+
+ drm_panel_init(&ctx->panel, &dsi->dev, &ili9805_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+
+ ctx->dvdd = devm_regulator_get(&dsi->dev, "dvdd");
+ if (IS_ERR(ctx->dvdd))
+ return PTR_ERR(ctx->dvdd);
+ ctx->avdd = devm_regulator_get(&dsi->dev, "avdd");
+ if (IS_ERR(ctx->avdd))
+ return PTR_ERR(ctx->avdd);
+
+ ctx->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->reset_gpio)) {
+ dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
+ return PTR_ERR(ctx->reset_gpio);
+ }
+
+ ctx->panel.prepare_prev_first = true;
+ ret = drm_panel_of_backlight(&ctx->panel);
+ if (ret)
+ return ret;
+
+ drm_panel_add(&ctx->panel);
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0) {
+ dev_err(&dsi->dev, "mipi_dsi_attach failed: %d\n", ret);
+ drm_panel_remove(&ctx->panel);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ili9805_dsi_remove(struct mipi_dsi_device *dsi)
+{
+ struct ili9805 *ctx = mipi_dsi_get_drvdata(dsi);
+ int ret;
+
+ ret = mipi_dsi_detach(dsi);
+ if (ret < 0)
+ dev_err(&dsi->dev, "failed to detach from DSI host: %d\n",
+ ret);
+
+ drm_panel_remove(&ctx->panel);
+}
+
+static const struct ili9805_desc gpm1780a0_desc = {
+ .init = gpm1780a0_init,
+ .init_length = ARRAY_SIZE(gpm1780a0_init),
+ .mode = &gpm1780a0_timing,
+ .width_mm = 65,
+ .height_mm = 65,
+};
+
+static const struct of_device_id ili9805_of_match[] = {
+ { .compatible = "giantplus,gpm1790a0", .data = &gpm1780a0_desc },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ili9805_of_match);
+
+static struct mipi_dsi_driver ili9805_dsi_driver = {
+ .probe = ili9805_dsi_probe,
+ .remove = ili9805_dsi_remove,
+ .driver = {
+ .name = "ili9805-dsi",
+ .of_match_table = ili9805_of_match,
+ },
+};
+module_mipi_dsi_driver(ili9805_dsi_driver);
+
+MODULE_AUTHOR("Matthias Proske <Matthias.Proske@xxxxxxxx>");
+MODULE_AUTHOR("Michael Trimarchi <michael@xxxxxxxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Ilitek ILI9805 Controller Driver");
+MODULE_LICENSE("GPL");
