1 // SPDX-License-Identifier: GPL-2.0
6  * Derived from drivers/gpu/drm/panel-samsung-ld9040.c
22 #include "panel-samsung-s6e63m0.h"
47 #define MAX_BRIGHTNESS              (NUM_GAMMA_LEVELS - 1)
101 	struct drm_panel panel;  member
136 static inline struct s6e63m0 *panel_to_s6e63m0(struct drm_panel *panel)  in panel_to_s6e63m0()  argument
138 	return container_of(panel, struct s6e63m0, panel);  in panel_to_s6e63m0()
143 	int ret = ctx->error;  in s6e63m0_clear_error()
145 	ctx->error = 0;  in s6e63m0_clear_error()
151 	if (ctx->error < 0)  in s6e63m0_dcs_read()
154 	ctx->error = ctx->dcs_read(ctx->dev, cmd, data);  in s6e63m0_dcs_read()
159 	if (ctx->error < 0 || len == 0)  in s6e63m0_dcs_write()
162 	ctx->error = ctx->dcs_write(ctx->dev, data, len);  in s6e63m0_dcs_write()
182 		dev_err(ctx->dev, "error checking LCD type (%d)\n", ret);  in s6e63m0_check_lcd_type()
183 		ctx->lcd_type = 0x00;  in s6e63m0_check_lcd_type()
187 	dev_info(ctx->dev, "MTP ID: %02x %02x %02x\n", id1, id2, id3);  in s6e63m0_check_lcd_type()
189 	/* We attempt to detect what panel is mounted on the controller */  in s6e63m0_check_lcd_type()
192 		dev_info(ctx->dev, "detected LCD panel AMS397GE MIPI M2\n");  in s6e63m0_check_lcd_type()
196 		dev_info(ctx->dev, "detected LCD panel AMS397GE MIPI SM2\n");  in s6e63m0_check_lcd_type()
199 		dev_info(ctx->dev, "unknown LCD panel type %02x\n", id2);  in s6e63m0_check_lcd_type()
203 	ctx->lcd_type = id2;  in s6e63m0_check_lcd_type()
285 	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);  in s6e63m0_power_on()
292 	gpiod_set_value(ctx->reset_gpio, 1);  in s6e63m0_power_on()
294 	gpiod_set_value(ctx->reset_gpio, 0);  in s6e63m0_power_on()
304 	gpiod_set_value(ctx->reset_gpio, 1);  in s6e63m0_power_off()
307 	ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);  in s6e63m0_power_off()
314 static int s6e63m0_disable(struct drm_panel *panel)  in s6e63m0_disable()  argument
316 	struct s6e63m0 *ctx = panel_to_s6e63m0(panel);  in s6e63m0_disable()
318 	if (!ctx->enabled)  in s6e63m0_disable()
321 	backlight_disable(ctx->bl_dev);  in s6e63m0_disable()
328 	ctx->enabled = false;  in s6e63m0_disable()
333 static int s6e63m0_unprepare(struct drm_panel *panel)  in s6e63m0_unprepare()  argument
335 	struct s6e63m0 *ctx = panel_to_s6e63m0(panel);  in s6e63m0_unprepare()
338 	if (!ctx->prepared)  in s6e63m0_unprepare()
347 	ctx->prepared = false;  in s6e63m0_unprepare()
352 static int s6e63m0_prepare(struct drm_panel *panel)  in s6e63m0_prepare()  argument
354 	struct s6e63m0 *ctx = panel_to_s6e63m0(panel);  in s6e63m0_prepare()
357 	if (ctx->prepared)  in s6e63m0_prepare()
378 		s6e63m0_unprepare(panel);  in s6e63m0_prepare()
380 	ctx->prepared = true;  in s6e63m0_prepare()
385 static int s6e63m0_enable(struct drm_panel *panel)  in s6e63m0_enable()  argument
387 	struct s6e63m0 *ctx = panel_to_s6e63m0(panel);  in s6e63m0_enable()
389 	if (ctx->enabled)  in s6e63m0_enable()
402 	backlight_enable(ctx->bl_dev);  in s6e63m0_enable()
404 	ctx->enabled = true;  in s6e63m0_enable()
409 static int s6e63m0_get_modes(struct drm_panel *panel,  in s6e63m0_get_modes()  argument
414 	mode = drm_mode_duplicate(connector->dev, &default_mode);  in s6e63m0_get_modes()
416 		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",  in s6e63m0_get_modes()
419 		return -ENOMEM;  in s6e63m0_get_modes()
424 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in s6e63m0_get_modes()
442 	int brightness = bd->props.brightness;  in s6e63m0_set_brightness()
465 	struct device *dev = ctx->dev;  in s6e63m0_backlight_register()
468 	ctx->bl_dev = devm_backlight_device_register(dev, "panel", dev, ctx,  in s6e63m0_backlight_register()
471 	if (IS_ERR(ctx->bl_dev)) {  in s6e63m0_backlight_register()
472 		ret = PTR_ERR(ctx->bl_dev);  in s6e63m0_backlight_register()
489 		return -ENOMEM;  in s6e63m0_probe()
491 	ctx->dcs_read = dcs_read;  in s6e63m0_probe()
492 	ctx->dcs_write = dcs_write;  in s6e63m0_probe()
495 	ctx->dev = dev;  in s6e63m0_probe()
496 	ctx->enabled = false;  in s6e63m0_probe()
497 	ctx->prepared = false;  in s6e63m0_probe()
499 	ctx->supplies[0].supply = "vdd3";  in s6e63m0_probe()
500 	ctx->supplies[1].supply = "vci";  in s6e63m0_probe()
501 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),  in s6e63m0_probe()
502 				      ctx->supplies);  in s6e63m0_probe()
508 	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);  in s6e63m0_probe()
509 	if (IS_ERR(ctx->reset_gpio)) {  in s6e63m0_probe()
510 		dev_err(dev, "cannot get reset-gpios %ld\n", PTR_ERR(ctx->reset_gpio));  in s6e63m0_probe()
511 		return PTR_ERR(ctx->reset_gpio);  in s6e63m0_probe()
514 	drm_panel_init(&ctx->panel, dev, &s6e63m0_drm_funcs,  in s6e63m0_probe()
522 	drm_panel_add(&ctx->panel);  in s6e63m0_probe()
532 	drm_panel_remove(&ctx->panel);  in s6e63m0_remove()