1 // SPDX-License-Identifier: GPL-2.0+
3  * MIPI-DSI Novatek NT35560-based panel controller.
6  * Sony ACX424AKM - a 480x854 AMOLED DSI panel
7  * Sony ACX424AKP - a 480x864 AMOLED DSI panel
9  * Copyright (C) Linaro Ltd. 2019-2021
11  * Based on code and know-how from Marcus Lorentzon
12  * Copyright (C) ST-Ericsson SA 2010
13  * Based on code and know-how from Johan Olson and Joakim Wesslen
24 #include <video/mipi_display.h>
78  * command mode using the maximum HS frequency.
120  * command mode using the maximum HS frequency.
152 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35560_set_brightness()
154 	int duty_ns = bl->props.brightness;  in nt35560_set_brightness()
166 			dev_err(nt->dev, "failed to disable display backlight (%d)\n", ret);  in nt35560_set_brightness()
173 	pwm_ratio = max(((duty_ns * 256) / period_ns) - 1, 1);  in nt35560_set_brightness()
179 	dev_dbg(nt->dev, "calculated duty cycle %02x\n", pwm_ratio);  in nt35560_set_brightness()
183 		dev_err(nt->dev, "failed to set display PWM ratio (%d)\n", ret);  in nt35560_set_brightness()
199 		dev_err(nt->dev, "failed to unlock CMD 2 (%d)\n", ret);  in nt35560_set_brightness()
205 		dev_err(nt->dev, "failed to enter page 1 (%d)\n", ret);  in nt35560_set_brightness()
211 		dev_err(nt->dev, "failed to disable MTP reload (%d)\n", ret);  in nt35560_set_brightness()
216 		dev_err(nt->dev, "failed to set PWM divisor (%d)\n", ret);  in nt35560_set_brightness()
222 		dev_err(nt->dev, "failed to lock CMD 2 (%d)\n", ret);  in nt35560_set_brightness()
231 		dev_err(nt->dev, "failed to enable display backlight (%d)\n", ret);  in nt35560_set_brightness()
250 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35560_read_id()
257 		dev_err(nt->dev, "could not vendor ID byte\n");  in nt35560_read_id()
262 		dev_err(nt->dev, "could not read device version byte\n");  in nt35560_read_id()
267 		dev_err(nt->dev, "could not read panel ID byte\n");  in nt35560_read_id()
272 		dev_err(nt->dev, "device vendor ID is zero\n");  in nt35560_read_id()
273 		return -ENODEV;  in nt35560_read_id()
282 		dev_info(nt->dev, "MTP vendor: %02x, version: %02x, panel: %02x\n",  in nt35560_read_id()
286 		dev_info(nt->dev, "unknown vendor: %02x, version: %02x, panel: %02x\n",  in nt35560_read_id()
298 	ret = regulator_enable(nt->supply);  in nt35560_power_on()
300 		dev_err(nt->dev, "failed to enable supply (%d)\n", ret);  in nt35560_power_on()
305 	gpiod_set_value_cansleep(nt->reset_gpio, 1);  in nt35560_power_on()
307 	/* De-assert RESET */  in nt35560_power_on()
308 	gpiod_set_value_cansleep(nt->reset_gpio, 0);  in nt35560_power_on()
317 	gpiod_set_value_cansleep(nt->reset_gpio, 1);  in nt35560_power_off()
320 	regulator_disable(nt->supply);  in nt35560_power_off()
326 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35560_prepare()
336 		dev_err(nt->dev, "failed to read panel ID (%d)\n", ret);  in nt35560_prepare()
340 	/* Enabe tearing mode: send TE (tearing effect) at VBLANK */  in nt35560_prepare()
344 		dev_err(nt->dev, "failed to enable vblank TE (%d)\n", ret);  in nt35560_prepare()
361 		dev_err(nt->dev, "failed to set MDDI (%d)\n", ret);  in nt35560_prepare()
365 	/* Exit sleep mode */  in nt35560_prepare()
368 		dev_err(nt->dev, "failed to exit sleep mode (%d)\n", ret);  in nt35560_prepare()
375 		dev_err(nt->dev, "failed to turn display on (%d)\n", ret);  in nt35560_prepare()
378 	if (nt->video_mode) {  in nt35560_prepare()
379 		/* In video mode turn peripheral on */  in nt35560_prepare()
382 			dev_err(nt->dev, "failed to turn on peripheral\n");  in nt35560_prepare()
397 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35560_unprepare()
402 		dev_err(nt->dev, "failed to turn display off (%d)\n", ret);  in nt35560_unprepare()
406 	/* Enter sleep mode */  in nt35560_unprepare()
409 		dev_err(nt->dev, "failed to enter sleep mode (%d)\n", ret);  in nt35560_unprepare()
424 	const struct nt35560_config *conf = nt->conf;  in nt35560_get_modes()
425 	struct drm_display_mode *mode;  in nt35560_get_modes()  local
427 	if (nt->video_mode)  in nt35560_get_modes()
428 		mode = drm_mode_duplicate(connector->dev,  in nt35560_get_modes()
429 					  conf->vid_mode);  in nt35560_get_modes()
431 		mode = drm_mode_duplicate(connector->dev,  in nt35560_get_modes()
432 					  conf->cmd_mode);  in nt35560_get_modes()
433 	if (!mode) {  in nt35560_get_modes()
434 		dev_err(panel->dev, "bad mode or failed to add mode\n");  in nt35560_get_modes()
435 		return -EINVAL;  in nt35560_get_modes()
437 	drm_mode_set_name(mode);  in nt35560_get_modes()
438 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in nt35560_get_modes()
440 	connector->display_info.width_mm = mode->width_mm;  in nt35560_get_modes()
441 	connector->display_info.height_mm = mode->height_mm;  in nt35560_get_modes()
443 	drm_mode_probed_add(connector, mode);  in nt35560_get_modes()
456 	struct device *dev = &dsi->dev;  in nt35560_probe()
462 		return -ENOMEM;  in nt35560_probe()
463 	nt->video_mode = of_property_read_bool(dev->of_node,  in nt35560_probe()
464 						"enforce-video-mode");  in nt35560_probe()
467 	nt->dev = dev;  in nt35560_probe()
469 	nt->conf = of_device_get_match_data(dev);  in nt35560_probe()
470 	if (!nt->conf) {  in nt35560_probe()
472 		return -ENODEV;  in nt35560_probe()
475 	dsi->lanes = 2;  in nt35560_probe()
476 	dsi->format = MIPI_DSI_FMT_RGB888;  in nt35560_probe()
478 	 * FIXME: these come from the ST-Ericsson vendor driver for the  in nt35560_probe()
480 	 * platform, if you have the datasheet, please cross-check the  in nt35560_probe()
483 	dsi->lp_rate = 19200000;  in nt35560_probe()
484 	dsi->hs_rate = 420160000;  in nt35560_probe()
486 	if (nt->video_mode)  in nt35560_probe()
487 		/* Burst mode using event for sync */  in nt35560_probe()
488 		dsi->mode_flags =  in nt35560_probe()
492 		dsi->mode_flags =  in nt35560_probe()
495 	nt->supply = devm_regulator_get(dev, "vddi");  in nt35560_probe()
496 	if (IS_ERR(nt->supply))  in nt35560_probe()
497 		return PTR_ERR(nt->supply);  in nt35560_probe()
500 	nt->reset_gpio = devm_gpiod_get_optional(dev, "reset",  in nt35560_probe()
502 	if (IS_ERR(nt->reset_gpio))  in nt35560_probe()
503 		return dev_err_probe(dev, PTR_ERR(nt->reset_gpio),  in nt35560_probe()
506 	drm_panel_init(&nt->panel, dev, &nt35560_drm_funcs,  in nt35560_probe()
509 	nt->panel.backlight = devm_backlight_device_register(dev, "nt35560", dev, nt,  in nt35560_probe()
511 	if (IS_ERR(nt->panel.backlight))  in nt35560_probe()
512 		return dev_err_probe(dev, PTR_ERR(nt->panel.backlight),  in nt35560_probe()
515 	drm_panel_add(&nt->panel);  in nt35560_probe()
519 		drm_panel_remove(&nt->panel);  in nt35560_probe()
531 	drm_panel_remove(&nt->panel);  in nt35560_remove()
551 		.name = "panel-novatek-nt35560",
558 MODULE_DESCRIPTION("MIPI-DSI Novatek NT35560 Panel Driver");