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 */
198 	struct drm_panel panel;  member
199 	struct mipi_dsi_device *dsi;  member
227 static inline struct rad_panel *to_rad_panel(struct drm_panel *panel)  in to_rad_panel()  argument
229 	return container_of(panel, struct rad_panel, panel);  in to_rad_panel()
232 static int rad_panel_push_cmd_list(struct mipi_dsi_device *dsi)  in rad_panel_push_cmd_list()  argument
240 		u8 buffer[2] = { entry->cmd, entry->param };  in rad_panel_push_cmd_list()
242 		ret = mipi_dsi_generic_write(dsi, &buffer, sizeof(buffer));  in rad_panel_push_cmd_list()
265 static int rad_panel_prepare(struct drm_panel *panel)  in rad_panel_prepare()  argument
267 	struct rad_panel *rad = to_rad_panel(panel);  in rad_panel_prepare()
270 	if (rad->prepared)  in rad_panel_prepare()
273 	ret = regulator_bulk_enable(rad->num_supplies, rad->supplies);  in rad_panel_prepare()
277 	if (rad->reset) {  in rad_panel_prepare()
278 		gpiod_set_value_cansleep(rad->reset, 1);  in rad_panel_prepare()
280 		gpiod_set_value_cansleep(rad->reset, 0);  in rad_panel_prepare()
284 	rad->prepared = true;  in rad_panel_prepare()
289 static int rad_panel_unprepare(struct drm_panel *panel)  in rad_panel_unprepare()  argument
291 	struct rad_panel *rad = to_rad_panel(panel);  in rad_panel_unprepare()
294 	if (!rad->prepared)  in rad_panel_unprepare()
302 	if (rad->reset) {  in rad_panel_unprepare()
303 		gpiod_set_value_cansleep(rad->reset, 1);  in rad_panel_unprepare()
305 		gpiod_set_value_cansleep(rad->reset, 0);  in rad_panel_unprepare()
308 	ret = regulator_bulk_disable(rad->num_supplies, rad->supplies);  in rad_panel_unprepare()
312 	rad->prepared = false;  in rad_panel_unprepare()
317 static int rad_panel_enable(struct drm_panel *panel)  in rad_panel_enable()  argument
319 	struct rad_panel *rad = to_rad_panel(panel);  in rad_panel_enable()
320 	struct mipi_dsi_device *dsi = rad->dsi;  in rad_panel_enable()  local
321 	struct device *dev = &dsi->dev;  in rad_panel_enable()
322 	int color_format = color_format_from_dsi_format(dsi->format);  in rad_panel_enable()
325 	if (rad->enabled)  in rad_panel_enable()
328 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;  in rad_panel_enable()
330 	ret = rad_panel_push_cmd_list(dsi);  in rad_panel_enable()
337 	ret = mipi_dsi_generic_write(dsi, (u8[]){ WRMAUCCTR, 0x00 }, 2);  in rad_panel_enable()
342 	ret = mipi_dsi_dcs_soft_reset(dsi);  in rad_panel_enable()
350 	/* Set DSI mode */  in rad_panel_enable()
351 	ret = mipi_dsi_generic_write(dsi, (u8[]){ 0xC2, 0x0B }, 2);  in rad_panel_enable()
353 		dev_err(dev, "Failed to set DSI mode (%d)\n", ret);  in rad_panel_enable()
357 	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);  in rad_panel_enable()
363 	ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0x380);  in rad_panel_enable()
369 	ret = mipi_dsi_dcs_set_pixel_format(dsi, color_format);  in rad_panel_enable()
376 	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);  in rad_panel_enable()
384 	ret = mipi_dsi_dcs_set_display_on(dsi);  in rad_panel_enable()
390 	backlight_enable(rad->backlight);  in rad_panel_enable()
392 	rad->enabled = true;  in rad_panel_enable()
397 	gpiod_set_value_cansleep(rad->reset, 1);  in rad_panel_enable()
402 static int rad_panel_disable(struct drm_panel *panel)  in rad_panel_disable()  argument
404 	struct rad_panel *rad = to_rad_panel(panel);  in rad_panel_disable()
405 	struct mipi_dsi_device *dsi = rad->dsi;  in rad_panel_disable()  local
406 	struct device *dev = &dsi->dev;  in rad_panel_disable()
409 	if (!rad->enabled)  in rad_panel_disable()
412 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;  in rad_panel_disable()
414 	backlight_disable(rad->backlight);  in rad_panel_disable()
418 	ret = mipi_dsi_dcs_set_display_off(dsi);  in rad_panel_disable()
426 	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);  in rad_panel_disable()
432 	rad->enabled = false;  in rad_panel_disable()
437 static int rad_panel_get_modes(struct drm_panel *panel,  in rad_panel_get_modes()  argument
442 	mode = drm_mode_duplicate(connector->dev, &default_mode);  in rad_panel_get_modes()
444 		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",  in rad_panel_get_modes()
447 		return -ENOMEM;  in rad_panel_get_modes()
451 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in rad_panel_get_modes()
454 	connector->display_info.width_mm = mode->width_mm;  in rad_panel_get_modes()
455 	connector->display_info.height_mm = mode->height_mm;  in rad_panel_get_modes()
456 	connector->display_info.bus_flags = rad_bus_flags;  in rad_panel_get_modes()
458 	drm_display_info_set_bus_formats(&connector->display_info,  in rad_panel_get_modes()
466 	struct mipi_dsi_device *dsi = bl_get_data(bl);  in rad_bl_get_brightness()  local
467 	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);  in rad_bl_get_brightness()
471 	if (!rad->prepared)  in rad_bl_get_brightness()
474 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;  in rad_bl_get_brightness()
476 	ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);  in rad_bl_get_brightness()
480 	bl->props.brightness = brightness;  in rad_bl_get_brightness()
487 	struct mipi_dsi_device *dsi = bl_get_data(bl);  in rad_bl_update_status()  local
488 	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);  in rad_bl_update_status()
491 	if (!rad->prepared)  in rad_bl_update_status()
494 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;  in rad_bl_update_status()
496 	ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);  in rad_bl_update_status()
523 	struct device *dev = &rad->dsi->dev;  in rad_init_regulators()
526 	rad->num_supplies = ARRAY_SIZE(rad_supply_names);  in rad_init_regulators()
527 	rad->supplies = devm_kcalloc(dev, rad->num_supplies,  in rad_init_regulators()
528 				     sizeof(*rad->supplies), GFP_KERNEL);  in rad_init_regulators()
529 	if (!rad->supplies)  in rad_init_regulators()
530 		return -ENOMEM;  in rad_init_regulators()
532 	for (i = 0; i < rad->num_supplies; i++)  in rad_init_regulators()
533 		rad->supplies[i].supply = rad_supply_names[i];  in rad_init_regulators()
535 	return devm_regulator_bulk_get(dev, rad->num_supplies, rad->supplies);  in rad_init_regulators()
538 static int rad_panel_probe(struct mipi_dsi_device *dsi)  in rad_panel_probe()  argument
540 	struct device *dev = &dsi->dev;  in rad_panel_probe()
541 	struct device_node *np = dev->of_node;  in rad_panel_probe()
542 	struct rad_panel *panel;  in rad_panel_probe()  local
547 	panel = devm_kzalloc(&dsi->dev, sizeof(*panel), GFP_KERNEL);  in rad_panel_probe()
548 	if (!panel)  in rad_panel_probe()
549 		return -ENOMEM;  in rad_panel_probe()
551 	mipi_dsi_set_drvdata(dsi, panel);  in rad_panel_probe()
553 	panel->dsi = dsi;  in rad_panel_probe()
555 	dsi->format = MIPI_DSI_FMT_RGB888;  in rad_panel_probe()
556 	dsi->mode_flags =  MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO;  in rad_panel_probe()
558 	ret = of_property_read_u32(np, "video-mode", &video_mode);  in rad_panel_probe()
563 			dsi->mode_flags |= MIPI_DSI_MODE_VIDEO_BURST;  in rad_panel_probe()
566 			/* non-burst mode with sync event */  in rad_panel_probe()
569 			/* non-burst mode with sync pulse */  in rad_panel_probe()
570 			dsi->mode_flags |= MIPI_DSI_MODE_VIDEO_SYNC_PULSE;  in rad_panel_probe()
578 	ret = of_property_read_u32(np, "dsi-lanes", &dsi->lanes);  in rad_panel_probe()
580 		dev_err(dev, "Failed to get dsi-lanes property (%d)\n", ret);  in rad_panel_probe()
584 	panel->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in rad_panel_probe()
585 	if (IS_ERR(panel->reset))  in rad_panel_probe()
586 		return PTR_ERR(panel->reset);  in rad_panel_probe()
593 	panel->backlight = devm_backlight_device_register(dev, dev_name(dev),  in rad_panel_probe()
594 							  dev, dsi, &rad_bl_ops,  in rad_panel_probe()
596 	if (IS_ERR(panel->backlight)) {  in rad_panel_probe()
597 		ret = PTR_ERR(panel->backlight);  in rad_panel_probe()
602 	ret = rad_init_regulators(panel);  in rad_panel_probe()
606 	drm_panel_init(&panel->panel, dev, &rad_panel_funcs,  in rad_panel_probe()
608 	dev_set_drvdata(dev, panel);  in rad_panel_probe()
610 	drm_panel_add(&panel->panel);  in rad_panel_probe()
612 	ret = mipi_dsi_attach(dsi);  in rad_panel_probe()
614 		drm_panel_remove(&panel->panel);  in rad_panel_probe()
619 static void rad_panel_remove(struct mipi_dsi_device *dsi)  in rad_panel_remove()  argument
621 	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);  in rad_panel_remove()
622 	struct device *dev = &dsi->dev;  in rad_panel_remove()
625 	ret = mipi_dsi_detach(dsi);  in rad_panel_remove()
629 	drm_panel_remove(&rad->panel);  in rad_panel_remove()
632 static void rad_panel_shutdown(struct mipi_dsi_device *dsi)  in rad_panel_shutdown()  argument
634 	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);  in rad_panel_shutdown()
636 	rad_panel_disable(&rad->panel);  in rad_panel_shutdown()
637 	rad_panel_unprepare(&rad->panel);  in rad_panel_shutdown()
648 		.name = "panel-raydium-rm67191",
658 MODULE_DESCRIPTION("DRM Driver for Raydium RM67191 MIPI DSI panel");