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
42  * and panel 00 ... seems like default values.
53 	struct drm_panel panel;  member
140 static inline struct nt35560 *panel_to_nt35560(struct drm_panel *panel)  in panel_to_nt35560()  argument
142 	return container_of(panel, struct nt35560, panel);  in panel_to_nt35560()
151 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35560_set_brightness()  local
153 	int duty_ns = bl->props.brightness;  in nt35560_set_brightness()
162 		ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY,  in nt35560_set_brightness()
165 			dev_err(nt->dev, "failed to disable display backlight (%d)\n", ret);  in nt35560_set_brightness()
172 	pwm_ratio = max(((duty_ns * 256) / period_ns) - 1, 1);  in nt35560_set_brightness()
178 	dev_dbg(nt->dev, "calculated duty cycle %02x\n", pwm_ratio);  in nt35560_set_brightness()
179 	ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,  in nt35560_set_brightness()
182 		dev_err(nt->dev, "failed to set display PWM ratio (%d)\n", ret);  in nt35560_set_brightness()
196 	ret = mipi_dsi_dcs_write(dsi, 0xf3, &par, 1);  in nt35560_set_brightness()
198 		dev_err(nt->dev, "failed to unlock CMD 2 (%d)\n", ret);  in nt35560_set_brightness()
202 	ret = mipi_dsi_dcs_write(dsi, 0x00, &par, 1);  in nt35560_set_brightness()
204 		dev_err(nt->dev, "failed to enter page 1 (%d)\n", ret);  in nt35560_set_brightness()
208 	ret = mipi_dsi_dcs_write(dsi, 0x7d, &par, 1);  in nt35560_set_brightness()
210 		dev_err(nt->dev, "failed to disable MTP reload (%d)\n", ret);  in nt35560_set_brightness()
213 	ret = mipi_dsi_dcs_write(dsi, 0x22, &pwm_div, 1);  in nt35560_set_brightness()
215 		dev_err(nt->dev, "failed to set PWM divisor (%d)\n", ret);  in nt35560_set_brightness()
219 	ret = mipi_dsi_dcs_write(dsi, 0x7f, &par, 1);  in nt35560_set_brightness()
221 		dev_err(nt->dev, "failed to lock CMD 2 (%d)\n", ret);  in nt35560_set_brightness()
227 	ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY,  in nt35560_set_brightness()
230 		dev_err(nt->dev, "failed to enable display backlight (%d)\n", ret);  in nt35560_set_brightness()
249 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35560_read_id()  local
250 	u8 vendor, version, panel;  in nt35560_read_id()  local
254 	ret = mipi_dsi_dcs_read(dsi, NT35560_DCS_READ_ID1, &vendor, 1);  in nt35560_read_id()
256 		dev_err(nt->dev, "could not vendor ID byte\n");  in nt35560_read_id()
259 	ret = mipi_dsi_dcs_read(dsi, NT35560_DCS_READ_ID2, &version, 1);  in nt35560_read_id()
261 		dev_err(nt->dev, "could not read device version byte\n");  in nt35560_read_id()
264 	ret = mipi_dsi_dcs_read(dsi, NT35560_DCS_READ_ID3, &panel, 1);  in nt35560_read_id()
266 		dev_err(nt->dev, "could not read panel ID byte\n");  in nt35560_read_id()
271 		dev_err(nt->dev, "device vendor ID is zero\n");  in nt35560_read_id()
272 		return -ENODEV;  in nt35560_read_id()
275 	val = (vendor << 8) | panel;  in nt35560_read_id()
281 		dev_info(nt->dev, "MTP vendor: %02x, version: %02x, panel: %02x\n",  in nt35560_read_id()
282 			 vendor, version, panel);  in nt35560_read_id()
285 		dev_info(nt->dev, "unknown vendor: %02x, version: %02x, panel: %02x\n",  in nt35560_read_id()
286 			 vendor, version, panel);  in nt35560_read_id()
297 	ret = regulator_enable(nt->supply);  in nt35560_power_on()
299 		dev_err(nt->dev, "failed to enable supply (%d)\n", ret);  in nt35560_power_on()
304 	gpiod_set_value_cansleep(nt->reset_gpio, 1);  in nt35560_power_on()
306 	/* De-assert RESET */  in nt35560_power_on()
307 	gpiod_set_value_cansleep(nt->reset_gpio, 0);  in nt35560_power_on()
316 	gpiod_set_value_cansleep(nt->reset_gpio, 1);  in nt35560_power_off()
319 	regulator_disable(nt->supply);  in nt35560_power_off()
322 static int nt35560_prepare(struct drm_panel *panel)  in nt35560_prepare()  argument
324 	struct nt35560 *nt = panel_to_nt35560(panel);  in nt35560_prepare()
325 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35560_prepare()  local
335 		dev_err(nt->dev, "failed to read panel ID (%d)\n", ret);  in nt35560_prepare()
340 	ret = mipi_dsi_dcs_set_tear_on(dsi,  in nt35560_prepare()
343 		dev_err(nt->dev, "failed to enable vblank TE (%d)\n", ret);  in nt35560_prepare()
351 	 * selects DSI, similar code is found in other drivers such as the  in nt35560_prepare()
352 	 * Sharp LS043T1LE01 which makes us suspect that this panel may be  in nt35560_prepare()
357 	ret = mipi_dsi_dcs_write(dsi, NT35560_DCS_SET_MDDI,  in nt35560_prepare()
360 		dev_err(nt->dev, "failed to set MDDI (%d)\n", ret);  in nt35560_prepare()
365 	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);  in nt35560_prepare()
367 		dev_err(nt->dev, "failed to exit sleep mode (%d)\n", ret);  in nt35560_prepare()
372 	ret = mipi_dsi_dcs_set_display_on(dsi);  in nt35560_prepare()
374 		dev_err(nt->dev, "failed to turn display on (%d)\n", ret);  in nt35560_prepare()
377 	if (nt->video_mode) {  in nt35560_prepare()
379 		ret = mipi_dsi_turn_on_peripheral(dsi);  in nt35560_prepare()
381 			dev_err(nt->dev, "failed to turn on peripheral\n");  in nt35560_prepare()
393 static int nt35560_unprepare(struct drm_panel *panel)  in nt35560_unprepare()  argument
395 	struct nt35560 *nt = panel_to_nt35560(panel);  in nt35560_unprepare()
396 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35560_unprepare()  local
399 	ret = mipi_dsi_dcs_set_display_off(dsi);  in nt35560_unprepare()
401 		dev_err(nt->dev, "failed to turn display off (%d)\n", ret);  in nt35560_unprepare()
406 	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);  in nt35560_unprepare()
408 		dev_err(nt->dev, "failed to enter sleep mode (%d)\n", ret);  in nt35560_unprepare()
419 static int nt35560_get_modes(struct drm_panel *panel,  in nt35560_get_modes()  argument
422 	struct nt35560 *nt = panel_to_nt35560(panel);  in nt35560_get_modes()
423 	const struct nt35560_config *conf = nt->conf;  in nt35560_get_modes()
426 	if (nt->video_mode)  in nt35560_get_modes()
427 		mode = drm_mode_duplicate(connector->dev,  in nt35560_get_modes()
428 					  conf->vid_mode);  in nt35560_get_modes()
430 		mode = drm_mode_duplicate(connector->dev,  in nt35560_get_modes()
431 					  conf->cmd_mode);  in nt35560_get_modes()
433 		dev_err(panel->dev, "bad mode or failed to add mode\n");  in nt35560_get_modes()
434 		return -EINVAL;  in nt35560_get_modes()
437 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in nt35560_get_modes()
439 	connector->display_info.width_mm = mode->width_mm;  in nt35560_get_modes()
440 	connector->display_info.height_mm = mode->height_mm;  in nt35560_get_modes()
453 static int nt35560_probe(struct mipi_dsi_device *dsi)  in nt35560_probe()  argument
455 	struct device *dev = &dsi->dev;  in nt35560_probe()
461 		return -ENOMEM;  in nt35560_probe()
462 	nt->video_mode = of_property_read_bool(dev->of_node,  in nt35560_probe()
463 						"enforce-video-mode");  in nt35560_probe()
465 	mipi_dsi_set_drvdata(dsi, nt);  in nt35560_probe()
466 	nt->dev = dev;  in nt35560_probe()
468 	nt->conf = of_device_get_match_data(dev);  in nt35560_probe()
469 	if (!nt->conf) {  in nt35560_probe()
471 		return -ENODEV;  in nt35560_probe()
474 	dsi->lanes = 2;  in nt35560_probe()
475 	dsi->format = MIPI_DSI_FMT_RGB888;  in nt35560_probe()
477 	 * FIXME: these come from the ST-Ericsson vendor driver for the  in nt35560_probe()
479 	 * platform, if you have the datasheet, please cross-check the  in nt35560_probe()
482 	dsi->lp_rate = 19200000;  in nt35560_probe()
483 	dsi->hs_rate = 420160000;  in nt35560_probe()
485 	if (nt->video_mode)  in nt35560_probe()
487 		dsi->mode_flags =  in nt35560_probe()
491 		dsi->mode_flags =  in nt35560_probe()
494 	nt->supply = devm_regulator_get(dev, "vddi");  in nt35560_probe()
495 	if (IS_ERR(nt->supply))  in nt35560_probe()
496 		return PTR_ERR(nt->supply);  in nt35560_probe()
499 	nt->reset_gpio = devm_gpiod_get_optional(dev, "reset",  in nt35560_probe()
501 	if (IS_ERR(nt->reset_gpio))  in nt35560_probe()
502 		return dev_err_probe(dev, PTR_ERR(nt->reset_gpio),  in nt35560_probe()
505 	drm_panel_init(&nt->panel, dev, &nt35560_drm_funcs,  in nt35560_probe()
508 	nt->panel.backlight = devm_backlight_device_register(dev, "nt35560", dev, nt,  in nt35560_probe()
510 	if (IS_ERR(nt->panel.backlight))  in nt35560_probe()
511 		return dev_err_probe(dev, PTR_ERR(nt->panel.backlight),  in nt35560_probe()
514 	drm_panel_add(&nt->panel);  in nt35560_probe()
516 	ret = mipi_dsi_attach(dsi);  in nt35560_probe()
518 		drm_panel_remove(&nt->panel);  in nt35560_probe()
525 static void nt35560_remove(struct mipi_dsi_device *dsi)  in nt35560_remove()  argument
527 	struct nt35560 *nt = mipi_dsi_get_drvdata(dsi);  in nt35560_remove()
529 	mipi_dsi_detach(dsi);  in nt35560_remove()
530 	drm_panel_remove(&nt->panel);  in nt35560_remove()
550 		.name = "panel-novatek-nt35560",
557 MODULE_DESCRIPTION("MIPI-DSI Novatek NT35560 Panel Driver");