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
226 static inline struct rad_panel *to_rad_panel(struct drm_panel *panel)  in to_rad_panel()  argument
228 	return container_of(panel, struct rad_panel, panel);  in to_rad_panel()
231 static int rad_panel_push_cmd_list(struct mipi_dsi_device *dsi)  in rad_panel_push_cmd_list()  argument
239 		u8 buffer[2] = { entry->cmd, entry->param };  in rad_panel_push_cmd_list()
241 		ret = mipi_dsi_generic_write(dsi, &buffer, sizeof(buffer));  in rad_panel_push_cmd_list()
264 static int rad_panel_prepare(struct drm_panel *panel)  in rad_panel_prepare()  argument
266 	struct rad_panel *rad = to_rad_panel(panel);  in rad_panel_prepare()
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()
285 static int rad_panel_unprepare(struct drm_panel *panel)  in rad_panel_unprepare()  argument
287 	struct rad_panel *rad = to_rad_panel(panel);  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()
310 static int rad_panel_enable(struct drm_panel *panel)  in rad_panel_enable()  argument
312 	struct rad_panel *rad = to_rad_panel(panel);  in rad_panel_enable()
313 	struct mipi_dsi_device *dsi = rad->dsi;  in rad_panel_enable()  local
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()
320 	ret = rad_panel_push_cmd_list(dsi);  in rad_panel_enable()
327 	ret = mipi_dsi_generic_write(dsi, (u8[]){ WRMAUCCTR, 0x00 }, 2);  in rad_panel_enable()
332 	ret = mipi_dsi_dcs_soft_reset(dsi);  in rad_panel_enable()
340 	/* Set DSI mode */  in rad_panel_enable()
341 	ret = mipi_dsi_generic_write(dsi, (u8[]){ 0xC2, 0x0B }, 2);  in rad_panel_enable()
343 		dev_err(dev, "Failed to set DSI mode (%d)\n", ret);  in rad_panel_enable()
347 	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);  in rad_panel_enable()
353 	ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0x380);  in rad_panel_enable()
359 	ret = mipi_dsi_dcs_set_pixel_format(dsi, color_format);  in rad_panel_enable()
366 	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);  in rad_panel_enable()
374 	ret = mipi_dsi_dcs_set_display_on(dsi);  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()
390 static int rad_panel_disable(struct drm_panel *panel)  in rad_panel_disable()  argument
392 	struct rad_panel *rad = to_rad_panel(panel);  in rad_panel_disable()
393 	struct mipi_dsi_device *dsi = rad->dsi;  in rad_panel_disable()  local
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()
403 	ret = mipi_dsi_dcs_set_display_off(dsi);  in rad_panel_disable()
411 	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);  in rad_panel_disable()
420 static int rad_panel_get_modes(struct drm_panel *panel,  in rad_panel_get_modes()  argument
425 	mode = drm_mode_duplicate(connector->dev, &default_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()
434 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  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()
449 	struct mipi_dsi_device *dsi = bl_get_data(bl);  in rad_bl_get_brightness()  local
450 	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);  in rad_bl_get_brightness()
454 	if (!rad->prepared)  in rad_bl_get_brightness()
457 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;  in rad_bl_get_brightness()
459 	ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);  in rad_bl_get_brightness()
463 	bl->props.brightness = brightness;  in rad_bl_get_brightness()
470 	struct mipi_dsi_device *dsi = bl_get_data(bl);  in rad_bl_update_status()  local
471 	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);  in rad_bl_update_status()
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()
521 static int rad_panel_probe(struct mipi_dsi_device *dsi)  in rad_panel_probe()  argument
523 	struct device *dev = &dsi->dev;  in rad_panel_probe()
524 	struct device_node *np = dev->of_node;  in rad_panel_probe()
525 	struct rad_panel *panel;  in rad_panel_probe()  local
530 	panel = devm_kzalloc(&dsi->dev, sizeof(*panel), GFP_KERNEL);  in rad_panel_probe()
531 	if (!panel)  in rad_panel_probe()
532 		return -ENOMEM;  in rad_panel_probe()
534 	mipi_dsi_set_drvdata(dsi, panel);  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()
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()
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()
577 							  dev, dsi, &rad_bl_ops,  in rad_panel_probe()
579 	if (IS_ERR(panel->backlight)) {  in rad_panel_probe()
580 		ret = PTR_ERR(panel->backlight);  in rad_panel_probe()
585 	ret = rad_init_regulators(panel);  in rad_panel_probe()
589 	drm_panel_init(&panel->panel, dev, &rad_panel_funcs,  in rad_panel_probe()
591 	dev_set_drvdata(dev, panel);  in rad_panel_probe()
593 	drm_panel_add(&panel->panel);  in rad_panel_probe()
595 	ret = mipi_dsi_attach(dsi);  in rad_panel_probe()
597 		drm_panel_remove(&panel->panel);  in rad_panel_probe()
602 static void rad_panel_remove(struct mipi_dsi_device *dsi)  in rad_panel_remove()  argument
604 	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);  in rad_panel_remove()
605 	struct device *dev = &dsi->dev;  in rad_panel_remove()
608 	ret = mipi_dsi_detach(dsi);  in rad_panel_remove()
612 	drm_panel_remove(&rad->panel);  in rad_panel_remove()
623 		.name = "panel-raydium-rm67191",
632 MODULE_DESCRIPTION("DRM Driver for Raydium RM67191 MIPI DSI panel");