1 // SPDX-License-Identifier: GPL-2.0
3  * Raydium RM67191 MIPI-DSI panel driver
11 #include <linux/media-bus-format.h>
24 /* Panel specific color-format bits */
201 	struct gpio_desc *reset;  member
239 		u8 buffer[2] = { entry->cmd, entry->param };  in rad_panel_push_cmd_list()
269 	ret = regulator_bulk_enable(rad->num_supplies, rad->supplies);  in rad_panel_prepare()
273 	if (rad->reset) {  in rad_panel_prepare()
274 		gpiod_set_value_cansleep(rad->reset, 1);  in rad_panel_prepare()
276 		gpiod_set_value_cansleep(rad->reset, 0);  in rad_panel_prepare()
280 	rad->prepared = true;  in rad_panel_prepare()
291 	 * Right after asserting the reset, we need to release it, so that the  in rad_panel_unprepare()
295 	if (rad->reset) {  in rad_panel_unprepare()
296 		gpiod_set_value_cansleep(rad->reset, 1);  in rad_panel_unprepare()
298 		gpiod_set_value_cansleep(rad->reset, 0);  in rad_panel_unprepare()
301 	ret = regulator_bulk_disable(rad->num_supplies, rad->supplies);  in rad_panel_unprepare()
305 	rad->prepared = false;  in rad_panel_unprepare()
313 	struct mipi_dsi_device *dsi = rad->dsi;  in rad_panel_enable()
314 	struct device *dev = &dsi->dev;  in rad_panel_enable()
315 	int color_format = color_format_from_dsi_format(dsi->format);  in rad_panel_enable()
318 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;  in rad_panel_enable()
331 	/* Software reset */  in rad_panel_enable()
334 		dev_err(dev, "Failed to do Software Reset (%d)\n", ret);  in rad_panel_enable()
340 	/* Set DSI mode */  in rad_panel_enable()
343 		dev_err(dev, "Failed to set DSI mode (%d)\n", ret);  in rad_panel_enable()
365 	/* Exit sleep mode */  in rad_panel_enable()
368 		dev_err(dev, "Failed to exit sleep mode (%d)\n", ret);  in rad_panel_enable()
380 	backlight_enable(rad->backlight);  in rad_panel_enable()
385 	gpiod_set_value_cansleep(rad->reset, 1);  in rad_panel_enable()
393 	struct mipi_dsi_device *dsi = rad->dsi;  in rad_panel_disable()
394 	struct device *dev = &dsi->dev;  in rad_panel_disable()
397 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;  in rad_panel_disable()
399 	backlight_disable(rad->backlight);  in rad_panel_disable()
413 		dev_err(dev, "Failed to enter sleep mode (%d)\n", ret);  in rad_panel_disable()
423 	struct drm_display_mode *mode;  in rad_panel_get_modes()  local
425 	mode = drm_mode_duplicate(connector->dev, &default_mode);  in rad_panel_get_modes()
426 	if (!mode) {  in rad_panel_get_modes()
427 		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",  in rad_panel_get_modes()
430 		return -ENOMEM;  in rad_panel_get_modes()
433 	drm_mode_set_name(mode);  in rad_panel_get_modes()
434 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in rad_panel_get_modes()
435 	drm_mode_probed_add(connector, mode);  in rad_panel_get_modes()
437 	connector->display_info.width_mm = mode->width_mm;  in rad_panel_get_modes()
438 	connector->display_info.height_mm = mode->height_mm;  in rad_panel_get_modes()
439 	connector->display_info.bus_flags = rad_bus_flags;  in rad_panel_get_modes()
441 	drm_display_info_set_bus_formats(&connector->display_info,  in rad_panel_get_modes()
454 	if (!rad->prepared)  in rad_bl_get_brightness()
457 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;  in rad_bl_get_brightness()
463 	bl->props.brightness = brightness;  in rad_bl_get_brightness()
474 	if (!rad->prepared)  in rad_bl_update_status()
477 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;  in rad_bl_update_status()
479 	ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);  in rad_bl_update_status()
506 	struct device *dev = &rad->dsi->dev;  in rad_init_regulators()
509 	rad->num_supplies = ARRAY_SIZE(rad_supply_names);  in rad_init_regulators()
510 	rad->supplies = devm_kcalloc(dev, rad->num_supplies,  in rad_init_regulators()
511 				     sizeof(*rad->supplies), GFP_KERNEL);  in rad_init_regulators()
512 	if (!rad->supplies)  in rad_init_regulators()
513 		return -ENOMEM;  in rad_init_regulators()
515 	for (i = 0; i < rad->num_supplies; i++)  in rad_init_regulators()
516 		rad->supplies[i].supply = rad_supply_names[i];  in rad_init_regulators()
518 	return devm_regulator_bulk_get(dev, rad->num_supplies, rad->supplies);  in rad_init_regulators()
523 	struct device *dev = &dsi->dev;  in rad_panel_probe()
524 	struct device_node *np = dev->of_node;  in rad_panel_probe()
530 	panel = devm_kzalloc(&dsi->dev, sizeof(*panel), GFP_KERNEL);  in rad_panel_probe()
532 		return -ENOMEM;  in rad_panel_probe()
536 	panel->dsi = dsi;  in rad_panel_probe()
538 	dsi->format = MIPI_DSI_FMT_RGB888;  in rad_panel_probe()
539 	dsi->mode_flags =  MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO;  in rad_panel_probe()
541 	ret = of_property_read_u32(np, "video-mode", &video_mode);  in rad_panel_probe()
545 			/* burst mode */  in rad_panel_probe()
546 			dsi->mode_flags |= MIPI_DSI_MODE_VIDEO_BURST;  in rad_panel_probe()
549 			/* non-burst mode with sync event */  in rad_panel_probe()
552 			/* non-burst mode with sync pulse */  in rad_panel_probe()
553 			dsi->mode_flags |= MIPI_DSI_MODE_VIDEO_SYNC_PULSE;  in rad_panel_probe()
556 			dev_warn(dev, "invalid video mode %d\n", video_mode);  in rad_panel_probe()
561 	ret = of_property_read_u32(np, "dsi-lanes", &dsi->lanes);  in rad_panel_probe()
563 		dev_err(dev, "Failed to get dsi-lanes property (%d)\n", ret);  in rad_panel_probe()
567 	panel->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in rad_panel_probe()
568 	if (IS_ERR(panel->reset))  in rad_panel_probe()
569 		return PTR_ERR(panel->reset);  in rad_panel_probe()
576 	panel->backlight = devm_backlight_device_register(dev, dev_name(dev),  in rad_panel_probe()
579 	if (IS_ERR(panel->backlight)) {  in rad_panel_probe()
580 		ret = PTR_ERR(panel->backlight);  in rad_panel_probe()
589 	drm_panel_init(&panel->panel, dev, &rad_panel_funcs,  in rad_panel_probe()
593 	drm_panel_add(&panel->panel);  in rad_panel_probe()
597 		drm_panel_remove(&panel->panel);  in rad_panel_probe()
605 	struct device *dev = &dsi->dev;  in rad_panel_remove()
612 	drm_panel_remove(&rad->panel);  in rad_panel_remove()
623 		.name = "panel-raydium-rm67191",