1 // SPDX-License-Identifier: GPL-2.0
3  * Raydium RM67191 MIPI-DSI panel driver
23 /* Panel specific color-format bits */
197 	struct drm_panel panel;  member
198 	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 	if (rad->prepared)  in rad_panel_prepare()
272 	ret = regulator_bulk_enable(rad->num_supplies, rad->supplies);  in rad_panel_prepare()
276 	if (rad->reset) {  in rad_panel_prepare()
277 		gpiod_set_value_cansleep(rad->reset, 1);  in rad_panel_prepare()
279 		gpiod_set_value_cansleep(rad->reset, 0);  in rad_panel_prepare()
283 	rad->prepared = true;  in rad_panel_prepare()
288 static int rad_panel_unprepare(struct drm_panel *panel)  in rad_panel_unprepare()  argument
290 	struct rad_panel *rad = to_rad_panel(panel);  in rad_panel_unprepare()
293 	if (!rad->prepared)  in rad_panel_unprepare()
301 	if (rad->reset) {  in rad_panel_unprepare()
302 		gpiod_set_value_cansleep(rad->reset, 1);  in rad_panel_unprepare()
304 		gpiod_set_value_cansleep(rad->reset, 0);  in rad_panel_unprepare()
307 	ret = regulator_bulk_disable(rad->num_supplies, rad->supplies);  in rad_panel_unprepare()
311 	rad->prepared = false;  in rad_panel_unprepare()
316 static int rad_panel_enable(struct drm_panel *panel)  in rad_panel_enable()  argument
318 	struct rad_panel *rad = to_rad_panel(panel);  in rad_panel_enable()
319 	struct mipi_dsi_device *dsi = rad->dsi;  in rad_panel_enable()  local
320 	struct device *dev = &dsi->dev;  in rad_panel_enable()
321 	int color_format = color_format_from_dsi_format(dsi->format);  in rad_panel_enable()
324 	if (rad->enabled)  in rad_panel_enable()
327 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;  in rad_panel_enable()
329 	ret = rad_panel_push_cmd_list(dsi);  in rad_panel_enable()
336 	ret = mipi_dsi_generic_write(dsi, (u8[]){ WRMAUCCTR, 0x00 }, 2);  in rad_panel_enable()
341 	ret = mipi_dsi_dcs_soft_reset(dsi);  in rad_panel_enable()
349 	/* Set DSI mode */  in rad_panel_enable()
350 	ret = mipi_dsi_generic_write(dsi, (u8[]){ 0xC2, 0x0B }, 2);  in rad_panel_enable()
352 		dev_err(dev, "Failed to set DSI mode (%d)\n", ret);  in rad_panel_enable()
356 	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);  in rad_panel_enable()
362 	ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0x380);  in rad_panel_enable()
368 	ret = mipi_dsi_dcs_set_pixel_format(dsi, color_format);  in rad_panel_enable()
375 	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);  in rad_panel_enable()
383 	ret = mipi_dsi_dcs_set_display_on(dsi);  in rad_panel_enable()
389 	backlight_enable(rad->backlight);  in rad_panel_enable()
391 	rad->enabled = true;  in rad_panel_enable()
396 	gpiod_set_value_cansleep(rad->reset, 1);  in rad_panel_enable()
401 static int rad_panel_disable(struct drm_panel *panel)  in rad_panel_disable()  argument
403 	struct rad_panel *rad = to_rad_panel(panel);  in rad_panel_disable()
404 	struct mipi_dsi_device *dsi = rad->dsi;  in rad_panel_disable()  local
405 	struct device *dev = &dsi->dev;  in rad_panel_disable()
408 	if (!rad->enabled)  in rad_panel_disable()
411 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;  in rad_panel_disable()
413 	backlight_disable(rad->backlight);  in rad_panel_disable()
417 	ret = mipi_dsi_dcs_set_display_off(dsi);  in rad_panel_disable()
425 	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);  in rad_panel_disable()
431 	rad->enabled = false;  in rad_panel_disable()
436 static int rad_panel_get_modes(struct drm_panel *panel,  in rad_panel_get_modes()  argument
441 	mode = drm_mode_duplicate(connector->dev, &default_mode);  in rad_panel_get_modes()
443 		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",  in rad_panel_get_modes()
446 		return -ENOMEM;  in rad_panel_get_modes()
450 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in rad_panel_get_modes()
453 	connector->display_info.width_mm = mode->width_mm;  in rad_panel_get_modes()
454 	connector->display_info.height_mm = mode->height_mm;  in rad_panel_get_modes()
455 	connector->display_info.bus_flags = rad_bus_flags;  in rad_panel_get_modes()
457 	drm_display_info_set_bus_formats(&connector->display_info,  in rad_panel_get_modes()
465 	struct mipi_dsi_device *dsi = bl_get_data(bl);  in rad_bl_get_brightness()  local
466 	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);  in rad_bl_get_brightness()
470 	if (!rad->prepared)  in rad_bl_get_brightness()
473 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;  in rad_bl_get_brightness()
475 	ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);  in rad_bl_get_brightness()
479 	bl->props.brightness = brightness;  in rad_bl_get_brightness()
486 	struct mipi_dsi_device *dsi = bl_get_data(bl);  in rad_bl_update_status()  local
487 	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);  in rad_bl_update_status()
490 	if (!rad->prepared)  in rad_bl_update_status()
493 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;  in rad_bl_update_status()
495 	ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);  in rad_bl_update_status()
522 	struct device *dev = &rad->dsi->dev;  in rad_init_regulators()
525 	rad->num_supplies = ARRAY_SIZE(rad_supply_names);  in rad_init_regulators()
526 	rad->supplies = devm_kcalloc(dev, rad->num_supplies,  in rad_init_regulators()
527 				     sizeof(*rad->supplies), GFP_KERNEL);  in rad_init_regulators()
528 	if (!rad->supplies)  in rad_init_regulators()
529 		return -ENOMEM;  in rad_init_regulators()
531 	for (i = 0; i < rad->num_supplies; i++)  in rad_init_regulators()
532 		rad->supplies[i].supply = rad_supply_names[i];  in rad_init_regulators()
534 	return devm_regulator_bulk_get(dev, rad->num_supplies, rad->supplies);  in rad_init_regulators()
537 static int rad_panel_probe(struct mipi_dsi_device *dsi)  in rad_panel_probe()  argument
539 	struct device *dev = &dsi->dev;  in rad_panel_probe()
540 	struct device_node *np = dev->of_node;  in rad_panel_probe()
541 	struct rad_panel *panel;  in rad_panel_probe()  local
546 	panel = devm_kzalloc(&dsi->dev, sizeof(*panel), GFP_KERNEL);  in rad_panel_probe()
547 	if (!panel)  in rad_panel_probe()
548 		return -ENOMEM;  in rad_panel_probe()
550 	mipi_dsi_set_drvdata(dsi, panel);  in rad_panel_probe()
552 	panel->dsi = dsi;  in rad_panel_probe()
554 	dsi->format = MIPI_DSI_FMT_RGB888;  in rad_panel_probe()
555 	dsi->mode_flags =  MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO;  in rad_panel_probe()
557 	ret = of_property_read_u32(np, "video-mode", &video_mode);  in rad_panel_probe()
562 			dsi->mode_flags |= MIPI_DSI_MODE_VIDEO_BURST;  in rad_panel_probe()
565 			/* non-burst mode with sync event */  in rad_panel_probe()
568 			/* non-burst mode with sync pulse */  in rad_panel_probe()
569 			dsi->mode_flags |= MIPI_DSI_MODE_VIDEO_SYNC_PULSE;  in rad_panel_probe()
577 	ret = of_property_read_u32(np, "dsi-lanes", &dsi->lanes);  in rad_panel_probe()
579 		dev_err(dev, "Failed to get dsi-lanes property (%d)\n", ret);  in rad_panel_probe()
583 	panel->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in rad_panel_probe()
584 	if (IS_ERR(panel->reset))  in rad_panel_probe()
585 		return PTR_ERR(panel->reset);  in rad_panel_probe()
592 	panel->backlight = devm_backlight_device_register(dev, dev_name(dev),  in rad_panel_probe()
593 							  dev, dsi, &rad_bl_ops,  in rad_panel_probe()
595 	if (IS_ERR(panel->backlight)) {  in rad_panel_probe()
596 		ret = PTR_ERR(panel->backlight);  in rad_panel_probe()
601 	ret = rad_init_regulators(panel);  in rad_panel_probe()
605 	drm_panel_init(&panel->panel, dev, &rad_panel_funcs,  in rad_panel_probe()
607 	dev_set_drvdata(dev, panel);  in rad_panel_probe()
609 	drm_panel_add(&panel->panel);  in rad_panel_probe()
611 	ret = mipi_dsi_attach(dsi);  in rad_panel_probe()
613 		drm_panel_remove(&panel->panel);  in rad_panel_probe()
618 static int rad_panel_remove(struct mipi_dsi_device *dsi)  in rad_panel_remove()  argument
620 	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);  in rad_panel_remove()
621 	struct device *dev = &dsi->dev;  in rad_panel_remove()
624 	ret = mipi_dsi_detach(dsi);  in rad_panel_remove()
628 	drm_panel_remove(&rad->panel);  in rad_panel_remove()
633 static void rad_panel_shutdown(struct mipi_dsi_device *dsi)  in rad_panel_shutdown()  argument
635 	struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);  in rad_panel_shutdown()
637 	rad_panel_disable(&rad->panel);  in rad_panel_shutdown()
638 	rad_panel_unprepare(&rad->panel);  in rad_panel_shutdown()
649 		.name = "panel-raydium-rm67191",
659 MODULE_DESCRIPTION("DRM Driver for Raydium RM67191 MIPI DSI panel");