1 // SPDX-License-Identifier: GPL-2.0
6  * Derived from drivers/gpu/drm/panel-samsung-ld9040.c
19 #include <linux/media-bus-format.h>
23 #include "panel-samsung-s6e63m0.h"
32 #define MAX_BRIGHTNESS		(NUM_GAMMA_LEVELS - 1)
228 	/* 30 - 60 cd: ACL off/NULL */
230 	/* 70 - 250 cd: 40P ACL */
232 	/* 260 - 300 cd: 50P ACL */
236 /* The ELVSS backlight regulator has 5 levels */
241 	0x0D,   /* 30 cd - 100 cd */
242 	0x09,   /* 110 cd - 160 cd */
243 	0x07,   /* 170 cd - 200 cd */
244 	0x00,   /* 210 cd - 300 cd */
247 /* This tells us which ELVSS level goes with which gamma */
249 	/* 30 - 100 cd */
251 	/* 110 - 160 cd */
253 	/* 170 - 200 cd */
255 	/* 210 - 300 cd */
305 	int ret = ctx->error;  in s6e63m0_clear_error()
307 	ctx->error = 0;  in s6e63m0_clear_error()
313 	if (ctx->error < 0)  in s6e63m0_dcs_read()
316 	ctx->error = ctx->dcs_read(ctx->dev, ctx->transport_data, cmd, data);  in s6e63m0_dcs_read()
321 	if (ctx->error < 0 || len == 0)  in s6e63m0_dcs_write()
324 	ctx->error = ctx->dcs_write(ctx->dev, ctx->transport_data, data, len);  in s6e63m0_dcs_write()
344 		dev_err(ctx->dev, "error checking LCD type (%d)\n", ret);  in s6e63m0_check_lcd_type()
345 		ctx->lcd_type = 0x00;  in s6e63m0_check_lcd_type()
349 	dev_info(ctx->dev, "MTP ID: %02x %02x %02x\n", id1, id2, id3);  in s6e63m0_check_lcd_type()
353 	 * The third ID byte represents the desired ELVSS pulse for  in s6e63m0_check_lcd_type()
358 		dev_info(ctx->dev, "detected LCD panel AMS397GE MIPI M2\n");  in s6e63m0_check_lcd_type()
359 		ctx->elvss_pulse = id3;  in s6e63m0_check_lcd_type()
363 		dev_info(ctx->dev, "detected LCD panel AMS397GE MIPI SM2\n");  in s6e63m0_check_lcd_type()
364 		ctx->elvss_pulse = id3;  in s6e63m0_check_lcd_type()
367 		dev_info(ctx->dev, "unknown LCD panel type %02x\n", id2);  in s6e63m0_check_lcd_type()
368 		/* Default ELVSS pulse level */  in s6e63m0_check_lcd_type()
369 		ctx->elvss_pulse = 0x16;  in s6e63m0_check_lcd_type()
373 	ctx->lcd_type = id2;  in s6e63m0_check_lcd_type()
387 	if (ctx->dsi_mode)  in s6e63m0_init()
469 	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);  in s6e63m0_power_on()
476 	gpiod_set_value(ctx->reset_gpio, 1);  in s6e63m0_power_on()
478 	gpiod_set_value(ctx->reset_gpio, 0);  in s6e63m0_power_on()
488 	gpiod_set_value(ctx->reset_gpio, 1);  in s6e63m0_power_off()
491 	ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);  in s6e63m0_power_off()
502 	backlight_disable(ctx->bl_dev);  in s6e63m0_disable()
568 	backlight_enable(ctx->bl_dev);  in s6e63m0_enable()
579 	mode = drm_mode_duplicate(connector->dev, &default_mode);  in s6e63m0_get_modes()
581 		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",  in s6e63m0_get_modes()
584 		return -ENOMEM;  in s6e63m0_get_modes()
587 	connector->display_info.width_mm = mode->width_mm;  in s6e63m0_get_modes()
588 	connector->display_info.height_mm = mode->height_mm;  in s6e63m0_get_modes()
589 	drm_display_info_set_bus_formats(&connector->display_info,  in s6e63m0_get_modes()
591 	connector->display_info.bus_flags = DRM_BUS_FLAG_DE_LOW |  in s6e63m0_get_modes()
596 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in s6e63m0_get_modes()
613 	int brightness = bd->props.brightness;  in s6e63m0_set_brightness()
618 	/* Adjust ELVSS to candela level */  in s6e63m0_set_brightness()
620 	elvss_val = ctx->elvss_pulse + s6e63m0_elvss_offsets[i];  in s6e63m0_set_brightness()
655 	struct device *dev = ctx->dev;  in s6e63m0_backlight_register()
658 	ctx->bl_dev = devm_backlight_device_register(dev, "panel", dev, ctx,  in s6e63m0_backlight_register()
661 	if (IS_ERR(ctx->bl_dev)) {  in s6e63m0_backlight_register()
662 		ret = PTR_ERR(ctx->bl_dev);  in s6e63m0_backlight_register()
680 		return -ENOMEM;  in s6e63m0_probe()
682 	ctx->transport_data = trsp;  in s6e63m0_probe()
683 	ctx->dsi_mode = dsi_mode;  in s6e63m0_probe()
684 	ctx->dcs_read = dcs_read;  in s6e63m0_probe()
685 	ctx->dcs_write = dcs_write;  in s6e63m0_probe()
688 	ctx->dev = dev;  in s6e63m0_probe()
690 	ret = device_property_read_u32(dev, "max-brightness", &max_brightness);  in s6e63m0_probe()
698 	ctx->supplies[0].supply = "vdd3";  in s6e63m0_probe()
699 	ctx->supplies[1].supply = "vci";  in s6e63m0_probe()
700 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),  in s6e63m0_probe()
701 				      ctx->supplies);  in s6e63m0_probe()
707 	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);  in s6e63m0_probe()
708 	if (IS_ERR(ctx->reset_gpio)) {  in s6e63m0_probe()
709 		dev_err(dev, "cannot get reset-gpios %ld\n", PTR_ERR(ctx->reset_gpio));  in s6e63m0_probe()
710 		return PTR_ERR(ctx->reset_gpio);  in s6e63m0_probe()
713 	drm_panel_init(&ctx->panel, dev, &s6e63m0_drm_funcs,  in s6e63m0_probe()
721 	drm_panel_add(&ctx->panel);  in s6e63m0_probe()
731 	drm_panel_remove(&ctx->panel);  in s6e63m0_remove()