// SPDX-License-Identifier: GPL-2.0-only
/*
 * Samsung AMS427AP24 panel with S6E88A0 controller
 * Copyright (c) 2024 Jakob Hauser <jahau@rocketmail.com>
 */

#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>

#include <video/mipi_display.h>

#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#include <drm/drm_probe_helper.h>

#define NUM_STEPS_CANDELA       54
#define NUM_STEPS_AID           39
#define NUM_STEPS_ELVSS         17

/* length of the payload data, thereof fixed and variable */
#define FIX_LEN_AID             4
#define FIX_LEN_ELVSS           2
#define FIX_LEN_GAMMA           1
#define VAR_LEN_AID             2
#define VAR_LEN_ELVSS           1
#define VAR_LEN_GAMMA           33
#define LEN_AID                 (FIX_LEN_AID + VAR_LEN_AID)
#define LEN_ELVSS               (FIX_LEN_ELVSS + VAR_LEN_ELVSS)
#define LEN_GAMMA               (FIX_LEN_GAMMA + VAR_LEN_GAMMA)

struct s6e88a0_ams427ap24 {
        struct drm_panel panel;
        struct backlight_device *bl_dev;
        struct mipi_dsi_device *dsi;
        struct regulator_bulk_data *supplies;
        struct gpio_desc *reset_gpio;
        bool flip_horizontal;
};

static const struct regulator_bulk_data s6e88a0_ams427ap24_supplies[] = {
        { .supply = "vdd3" },
        { .supply = "vci" },
};

static inline
struct s6e88a0_ams427ap24 *to_s6e88a0_ams427ap24(struct drm_panel *panel)
{
        return container_of(panel, struct s6e88a0_ams427ap24, panel);
}

enum candela {
        CANDELA_10CD, /* 0 */
        CANDELA_11CD,
        CANDELA_12CD,
        CANDELA_13CD,
        CANDELA_14CD,
        CANDELA_15CD,
        CANDELA_16CD,
        CANDELA_17CD,
        CANDELA_19CD,
        CANDELA_20CD,
        CANDELA_21CD,
        CANDELA_22CD,
        CANDELA_24CD,
        CANDELA_25CD,
        CANDELA_27CD,
        CANDELA_29CD,
        CANDELA_30CD,
        CANDELA_32CD,
        CANDELA_34CD,
        CANDELA_37CD,
        CANDELA_39CD,
        CANDELA_41CD,
        CANDELA_44CD,
        CANDELA_47CD,
        CANDELA_50CD,
        CANDELA_53CD,
        CANDELA_56CD,
        CANDELA_60CD,
        CANDELA_64CD,
        CANDELA_68CD,
        CANDELA_72CD,
        CANDELA_77CD,
        CANDELA_82CD,
        CANDELA_87CD,
        CANDELA_93CD,
        CANDELA_98CD,
        CANDELA_105CD,
        CANDELA_111CD,
        CANDELA_119CD,
        CANDELA_126CD,
        CANDELA_134CD,
        CANDELA_143CD,
        CANDELA_152CD,
        CANDELA_162CD,
        CANDELA_172CD,
        CANDELA_183CD,
        CANDELA_195CD,
        CANDELA_207CD,
        CANDELA_220CD,
        CANDELA_234CD,
        CANDELA_249CD,
        CANDELA_265CD,
        CANDELA_282CD,
        CANDELA_300CD, /* 53 */
};

static const int s6e88a0_ams427ap24_br_to_cd[NUM_STEPS_CANDELA] = {
        /* columns: brightness from, brightness till, candela */
        /* 0 */    10,  /* 10CD */
        /* 11 */   11,  /* 11CD */
        /* 12 */   12,  /* 12CD */
        /* 13 */   13,  /* 13CD */
        /* 14 */   14,  /* 14CD */
        /* 15 */   15,  /* 15CD */
        /* 16 */   16,  /* 16CD */
        /* 17 */   17,  /* 17CD */
        /* 18 */   18,  /* 19CD */
        /* 19 */   19,  /* 20CD */
        /* 20 */   20,  /* 21CD */
        /* 21 */   21,  /* 22CD */
        /* 22 */   22,  /* 24CD */
        /* 23 */   23,  /* 25CD */
        /* 24 */   24,  /* 27CD */
        /* 25 */   25,  /* 29CD */
        /* 26 */   26,  /* 30CD */
        /* 27 */   27,  /* 32CD */
        /* 28 */   28,  /* 34CD */
        /* 29 */   29,  /* 37CD */
        /* 30 */   30,  /* 39CD */
        /* 31 */   32,  /* 41CD */
        /* 33 */   34,  /* 44CD */
        /* 35 */   36,  /* 47CD */
        /* 37 */   38,  /* 50CD */
        /* 39 */   40,  /* 53CD */
        /* 41 */   43,  /* 56CD */
        /* 44 */   46,  /* 60CD */
        /* 47 */   49,  /* 64CD */
        /* 50 */   52,  /* 68CD */
        /* 53 */   56,  /* 72CD */
        /* 57 */   59,  /* 77CD */
        /* 60 */   63,  /* 82CD */
        /* 64 */   67,  /* 87CD */
        /* 68 */   71,  /* 93CD */
        /* 72 */   76,  /* 98CD */
        /* 77 */   80,  /* 105CD */
        /* 81 */   86,  /* 111CD */
        /* 87 */   91,  /* 119CD */
        /* 92 */   97,  /* 126CD */
        /* 98 */   104, /* 134CD */
        /* 105 */  110, /* 143CD */
        /* 111 */  118, /* 152CD */
        /* 119 */  125, /* 162CD */
        /* 126 */  133, /* 172CD */
        /* 134 */  142, /* 183CD */
        /* 143 */  150, /* 195CD */
        /* 151 */  160, /* 207CD */
        /* 161 */  170, /* 220CD */
        /* 171 */  181, /* 234CD */
        /* 182 */  205, /* 249CD */
        /* 206 */  234, /* 265CD */
        /* 235 */  254, /* 282CD */
        /* 255 */  255, /* 300CD */
};

static const u8 s6e88a0_ams427ap24_aid[NUM_STEPS_AID][VAR_LEN_AID] = {
        { 0x03, 0x77 }, /* AOR 90.9%, 10CD */
        { 0x03, 0x73 }, /* AOR 90.5%, 11CD */
        { 0x03, 0x69 }, /* AOR 89.4%, 12CD */
        { 0x03, 0x65 }, /* AOR 89.0%, 13CD */
        { 0x03, 0x61 }, /* AOR 88.6%, 14CD */
        { 0x03, 0x55 }, /* AOR 87.4%, 15CD */
        { 0x03, 0x50 }, /* AOR 86.9%, 16CD */
        { 0x03, 0x45 }, /* AOR 85.8%, 17CD */
        { 0x03, 0x35 }, /* AOR 84.1%, 19CD */
        { 0x03, 0x27 }, /* AOR 82.7%, 20CD */
        { 0x03, 0x23 }, /* AOR 82.3%, 21CD */
        { 0x03, 0x17 }, /* AOR 81.0%, 22CD */
        { 0x03, 0x11 }, /* AOR 80.4%, 24CD */
        { 0x03, 0x04 }, /* AOR 79.1%, 25CD */
        { 0x02, 0xf4 }, /* AOR 77.5%, 27CD */
        { 0x02, 0xe3 }, /* AOR 75.7%, 29CD */
        { 0x02, 0xd7 }, /* AOR 74.5%, 30CD */
        { 0x02, 0xc6 }, /* AOR 72.7%, 32CD */
        { 0x02, 0xb7 }, /* AOR 71.2%, 34CD */
        { 0x02, 0xa1 }, /* AOR 69.0%, 37CD */
        { 0x02, 0x91 }, /* AOR 67.3%, 39CD */
        { 0x02, 0x78 }, /* AOR 64.8%, 41CD */
        { 0x02, 0x62 }, /* AOR 62.5%, 44CD */
        { 0x02, 0x45 }, /* AOR 59.5%, 47CD */
        { 0x02, 0x30 }, /* AOR 57.4%, 50CD */
        { 0x02, 0x13 }, /* AOR 54.4%, 53CD */
        { 0x01, 0xf5 }, /* AOR 51.3%, 56CD */
        { 0x01, 0xd3 }, /* AOR 47.8%, 60CD */
        { 0x01, 0xb1 }, /* AOR 44.4%, 64CD */
        { 0x01, 0x87 }, /* AOR 40.1%, 68CD */
        { 0x01, 0x63 }, /* AOR 36.6%, 72CD */
        { 0x01, 0x35 }, /* AOR 31.7%, 77CD */
        { 0x01, 0x05 }, /* AOR 26.9%, 82CD */
        { 0x00, 0xd5 }, /* AOR 21.8%, 87CD */
        { 0x00, 0xa1 }, /* AOR 16.5%, 93CD */
        { 0x00, 0x6f }, /* AOR 11.4%, 98CD */
        { 0x00, 0x31 }, /* AOR 5.0%, 105CD */
        { 0x01, 0x86 }, /* AOR 40.0%, 111CD ~ 172CD */
        { 0x00, 0x08 }, /* AOR 0.6%, 183CD ~ 300CD */
};

static const u8 s6e88a0_ams427ap24_elvss[NUM_STEPS_ELVSS][VAR_LEN_ELVSS] = {
        { 0x14 }, /* 10CD ~ 111CD */
        { 0x13 }, /* 119CD */
        { 0x12 }, /* 126CD */
        { 0x12 }, /* 134CD */
        { 0x11 }, /* 143CD */
        { 0x10 }, /* 152CD */
        { 0x0f }, /* 162CD */
        { 0x0e }, /* 172CD */
        { 0x11 }, /* 183CD */
        { 0x11 }, /* 195CD */
        { 0x10 }, /* 207CD */
        { 0x0f }, /* 220CD */
        { 0x0f }, /* 234CD */
        { 0x0e }, /* 249CD */
        { 0x0d }, /* 265CD */
        { 0x0c }, /* 282CD */
        { 0x0b }, /* 300CD */
};

static const u8 s6e88a0_ams427ap24_gamma[NUM_STEPS_CANDELA][VAR_LEN_GAMMA] = {
        /* 10CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8c, 0x8b,
          0x8c, 0x87, 0x89, 0x89, 0x88, 0x87, 0x8c, 0x80, 0x82, 0x88, 0x7b,
          0x72, 0x8c, 0x60, 0x68, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
        /* 11CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8c, 0x8b,
          0x8c, 0x87, 0x89, 0x89, 0x88, 0x87, 0x8c, 0x80, 0x82, 0x88, 0x7b,
          0x72, 0x8c, 0x60, 0x68, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
        /* 12CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8b, 0x8b,
          0x8c, 0x88, 0x89, 0x8a, 0x88, 0x87, 0x8c, 0x81, 0x82, 0x87, 0x7a,
          0x72, 0x8b, 0x60, 0x68, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
        /* 13CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8b, 0x8b,
          0x8c, 0x88, 0x89, 0x8a, 0x88, 0x87, 0x8c, 0x81, 0x82, 0x87, 0x7a,
          0x72, 0x8b, 0x61, 0x69, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
        /* 14CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
          0x8c, 0x88, 0x89, 0x8a, 0x87, 0x86, 0x8a, 0x82, 0x82, 0x87, 0x79,
          0x71, 0x89, 0x63, 0x6c, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
        /* 15CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8c, 0x8c,
          0x8c, 0x86, 0x87, 0x88, 0x85, 0x85, 0x8a, 0x83, 0x83, 0x88, 0x78,
          0x72, 0x89, 0x64, 0x6c, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
        /* 16CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
          0x8c, 0x86, 0x88, 0x88, 0x86, 0x86, 0x8a, 0x84, 0x84, 0x88, 0x78,
          0x72, 0x89, 0x5d, 0x67, 0x8b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
        /* 17CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
          0x8b, 0x87, 0x89, 0x89, 0x86, 0x86, 0x8a, 0x84, 0x83, 0x87, 0x78,
          0x73, 0x89, 0x64, 0x6e, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
        /* 19CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
          0x8b, 0x87, 0x89, 0x89, 0x86, 0x86, 0x89, 0x84, 0x84, 0x87, 0x77,
          0x72, 0x88, 0x65, 0x6f, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
        /* 20CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
          0x8b, 0x88, 0x89, 0x89, 0x85, 0x85, 0x88, 0x82, 0x83, 0x85, 0x79,
          0x73, 0x88, 0x65, 0x6f, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
        /* 21CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
          0x8b, 0x88, 0x89, 0x89, 0x85, 0x85, 0x88, 0x82, 0x83, 0x85, 0x79,
          0x74, 0x88, 0x65, 0x6f, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
        /* 22CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
          0x8c, 0x86, 0x88, 0x87, 0x86, 0x86, 0x89, 0x82, 0x83, 0x85, 0x7c,
          0x75, 0x87, 0x65, 0x6f, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
        /* 24CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
          0x8c, 0x86, 0x88, 0x87, 0x86, 0x86, 0x89, 0x82, 0x83, 0x85, 0x7c,
          0x76, 0x86, 0x66, 0x6f, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
        /* 25CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x89, 0x88, 0x87, 0x87, 0x89, 0x82, 0x82, 0x84, 0x7f,
          0x7a, 0x89, 0x6b, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 27CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x89, 0x88, 0x87, 0x87, 0x89, 0x82, 0x82, 0x84, 0x7f,
          0x7a, 0x89, 0x6b, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 29CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x84, 0x85, 0x86, 0x80,
          0x7b, 0x88, 0x6a, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 30CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x84, 0x85, 0x86, 0x80,
          0x7b, 0x88, 0x6a, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 32CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x84, 0x85, 0x86, 0x80,
          0x7b, 0x88, 0x6a, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 34CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x83, 0x84, 0x84, 0x7f,
          0x79, 0x86, 0x6c, 0x76, 0x91, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 37CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x88, 0x88, 0x87, 0x86, 0x87, 0x83, 0x84, 0x84, 0x7f,
          0x79, 0x86, 0x6c, 0x76, 0x90, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 39CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x88, 0x87, 0x84, 0x84, 0x86, 0x83, 0x85, 0x85, 0x80,
          0x79, 0x85, 0x6c, 0x76, 0x90, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 41CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x88, 0x87, 0x84, 0x84, 0x86, 0x81, 0x84, 0x83, 0x7f,
          0x79, 0x84, 0x6e, 0x79, 0x93, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 44CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x88, 0x87, 0x84, 0x84, 0x86, 0x81, 0x84, 0x83, 0x7f,
          0x79, 0x84, 0x6e, 0x79, 0x92, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 47CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x88, 0x87, 0x84, 0x85, 0x86, 0x81, 0x84, 0x83, 0x7f,
          0x79, 0x83, 0x6f, 0x79, 0x91, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 50CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x88, 0x87, 0x84, 0x85, 0x86, 0x82, 0x84, 0x83, 0x7f,
          0x79, 0x83, 0x6f, 0x79, 0x90, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 53CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
          0x8b, 0x86, 0x88, 0x87, 0x83, 0x83, 0x85, 0x84, 0x85, 0x85, 0x7f,
          0x79, 0x83, 0x70, 0x79, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 56CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8a,
          0x8a, 0x87, 0x89, 0x87, 0x83, 0x83, 0x85, 0x84, 0x85, 0x84, 0x7f,
          0x79, 0x82, 0x70, 0x7a, 0x8e, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 60CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8a,
          0x8a, 0x87, 0x89, 0x87, 0x83, 0x83, 0x85, 0x84, 0x85, 0x84, 0x7e,
          0x79, 0x82, 0x71, 0x7a, 0x8d, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 64CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8a,
          0x8a, 0x86, 0x88, 0x86, 0x84, 0x84, 0x86, 0x82, 0x83, 0x82, 0x80,
          0x7a, 0x84, 0x71, 0x7a, 0x8c, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 68CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
          0x8a, 0x86, 0x88, 0x86, 0x84, 0x84, 0x86, 0x82, 0x84, 0x82, 0x81,
          0x7b, 0x83, 0x72, 0x7b, 0x8b, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 72CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
          0x8a, 0x86, 0x88, 0x86, 0x85, 0x85, 0x86, 0x82, 0x84, 0x82, 0x81,
          0x7b, 0x83, 0x72, 0x7c, 0x8a, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 77CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
          0x8a, 0x85, 0x87, 0x85, 0x85, 0x87, 0x87, 0x82, 0x84, 0x82, 0x81,
          0x7c, 0x82, 0x72, 0x7c, 0x89, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 82CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
          0x8a, 0x85, 0x87, 0x85, 0x85, 0x87, 0x87, 0x82, 0x84, 0x82, 0x81,
          0x7c, 0x82, 0x73, 0x7c, 0x88, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 87CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
          0x8a, 0x85, 0x87, 0x85, 0x84, 0x84, 0x86, 0x80, 0x84, 0x81, 0x80,
          0x7a, 0x82, 0x76, 0x7f, 0x89, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 93CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8b, 0x8a,
          0x8a, 0x86, 0x87, 0x85, 0x84, 0x85, 0x86, 0x80, 0x84, 0x80, 0x80,
          0x7a, 0x82, 0x76, 0x80, 0x88, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 98CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8b, 0x8a,
          0x8a, 0x86, 0x87, 0x85, 0x85, 0x85, 0x86, 0x80, 0x84, 0x80, 0x80,
          0x7a, 0x82, 0x76, 0x80, 0x88, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
        /* 105CD */
        { 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x89, 0x88, 0x88, 0x8b, 0x8a,
          0x8a, 0x84, 0x87, 0x85, 0x85, 0x85, 0x85, 0x80, 0x84, 0x80, 0x7f,
          0x79, 0x81, 0x71, 0x7d, 0x87, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
        /* 111CD */
        { 0x00, 0xdf, 0x00, 0xde, 0x00, 0xde, 0x85, 0x85, 0x84, 0x87, 0x86,
          0x87, 0x85, 0x86, 0x85, 0x83, 0x83, 0x83, 0x81, 0x82, 0x82, 0x80,
          0x7d, 0x82, 0x75, 0x7f, 0x86, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 119CD */
        { 0x00, 0xe3, 0x00, 0xe1, 0x00, 0xe2, 0x85, 0x85, 0x84, 0x86, 0x85,
          0x85, 0x84, 0x85, 0x84, 0x83, 0x83, 0x83, 0x82, 0x82, 0x82, 0x7e,
          0x7b, 0x81, 0x75, 0x7f, 0x86, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 126CD */
        { 0x00, 0xe6, 0x00, 0xe5, 0x00, 0xe5, 0x85, 0x84, 0x84, 0x85, 0x85,
          0x85, 0x84, 0x84, 0x84, 0x82, 0x83, 0x83, 0x80, 0x81, 0x81, 0x80,
          0x7f, 0x83, 0x73, 0x7c, 0x84, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 134CD */
        { 0x00, 0xe9, 0x00, 0xe8, 0x00, 0xe8, 0x84, 0x84, 0x83, 0x85, 0x85,
          0x85, 0x84, 0x84, 0x83, 0x81, 0x82, 0x82, 0x81, 0x81, 0x81, 0x7f,
          0x7d, 0x81, 0x73, 0x7c, 0x83, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 143CD */
        { 0x00, 0xed, 0x00, 0xec, 0x00, 0xec, 0x84, 0x83, 0x83, 0x84, 0x84,
          0x84, 0x84, 0x84, 0x83, 0x82, 0x83, 0x83, 0x81, 0x80, 0x81, 0x7f,
          0x7e, 0x81, 0x70, 0x79, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 152CD */
        { 0x00, 0xf0, 0x00, 0xf0, 0x00, 0xf0, 0x83, 0x83, 0x83, 0x83, 0x83,
          0x83, 0x84, 0x84, 0x83, 0x81, 0x81, 0x81, 0x80, 0x80, 0x81, 0x80,
          0x80, 0x82, 0x6f, 0x78, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 162CD */
        { 0x00, 0xf4, 0x00, 0xf3, 0x00, 0xf4, 0x83, 0x83, 0x83, 0x83, 0x83,
          0x83, 0x82, 0x81, 0x81, 0x81, 0x81, 0x81, 0x80, 0x80, 0x81, 0x80,
          0x7f, 0x82, 0x6f, 0x78, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 172CD */
        { 0x00, 0xf8, 0x00, 0xf8, 0x00, 0xf8, 0x82, 0x82, 0x82, 0x82, 0x82,
          0x82, 0x82, 0x81, 0x81, 0x80, 0x81, 0x80, 0x80, 0x80, 0x81, 0x81,
          0x80, 0x83, 0x6d, 0x76, 0x7d, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 183CD */
        { 0x00, 0xe0, 0x00, 0xdf, 0x00, 0xdf, 0x84, 0x84, 0x83, 0x86, 0x86,
          0x86, 0x83, 0x84, 0x83, 0x82, 0x82, 0x82, 0x81, 0x83, 0x81, 0x81,
          0x7e, 0x81, 0x80, 0x82, 0x84, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 195CD */
        { 0x00, 0xe4, 0x00, 0xe3, 0x00, 0xe3, 0x84, 0x83, 0x83, 0x85, 0x85,
          0x85, 0x83, 0x84, 0x83, 0x81, 0x82, 0x82, 0x82, 0x83, 0x81, 0x81,
          0x80, 0x82, 0x7d, 0x7f, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 207CD */
        { 0x00, 0xe7, 0x00, 0xe6, 0x00, 0xe6, 0x83, 0x82, 0x82, 0x85, 0x85,
          0x85, 0x82, 0x83, 0x83, 0x82, 0x82, 0x82, 0x80, 0x81, 0x80, 0x81,
          0x80, 0x82, 0x7d, 0x7f, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 220CD */
        { 0x00, 0xeb, 0x00, 0xea, 0x00, 0xea, 0x83, 0x83, 0x82, 0x84, 0x84,
          0x84, 0x82, 0x83, 0x82, 0x81, 0x81, 0x82, 0x81, 0x82, 0x81, 0x80,
          0x7e, 0x80, 0x7d, 0x7f, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 234CD */
        { 0x00, 0xef, 0x00, 0xee, 0x00, 0xee, 0x83, 0x82, 0x82, 0x83, 0x83,
          0x83, 0x82, 0x82, 0x82, 0x81, 0x81, 0x81, 0x80, 0x80, 0x80, 0x80,
          0x80, 0x81, 0x7b, 0x7c, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 249CD */
        { 0x00, 0xf3, 0x00, 0xf2, 0x00, 0xf2, 0x82, 0x81, 0x81, 0x83, 0x83,
          0x83, 0x82, 0x82, 0x82, 0x81, 0x81, 0x81, 0x80, 0x81, 0x80, 0x7f,
          0x7e, 0x7f, 0x7b, 0x7c, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 265CD */
        { 0x00, 0xf7, 0x00, 0xf7, 0x00, 0xf7, 0x81, 0x81, 0x80, 0x82, 0x82,
          0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x81, 0x80, 0x7f,
          0x7e, 0x7f, 0x7b, 0x7c, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 282CD */
        { 0x00, 0xfb, 0x00, 0xfb, 0x00, 0xfb, 0x80, 0x80, 0x80, 0x81, 0x81,
          0x81, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x7f, 0x7f, 0x7f, 0x7f,
          0x7f, 0x7f, 0x78, 0x79, 0x7d, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
        /* 300CD */
        { 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
          0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
          0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00 },
};

static int s6e88a0_ams427ap24_set_brightness(struct backlight_device *bd)
{
        struct s6e88a0_ams427ap24 *ctx = bl_get_data(bd);
        struct mipi_dsi_device *dsi = ctx->dsi;
        struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
        struct device *dev = &dsi->dev;
        int brightness = bd->props.brightness;
        int candela_enum;
        u8 b2[LEN_AID] = { 0xb2, 0x40, 0x08, 0x20, 0x00, 0x00 };
        u8 b6[LEN_ELVSS] = { 0xb6, 0x28, 0x00 };
        u8 ca[LEN_GAMMA];

        /* get candela enum from brightness */
        for (candela_enum = 0; candela_enum < NUM_STEPS_CANDELA; candela_enum++)
                if (brightness <= s6e88a0_ams427ap24_br_to_cd[candela_enum])
                        break;

        /* get aid */
        switch (candela_enum) {
        case CANDELA_10CD ... CANDELA_105CD:
                memcpy(&b2[FIX_LEN_AID],
                       s6e88a0_ams427ap24_aid[candela_enum],
                       VAR_LEN_AID);
                break;
        case CANDELA_111CD ... CANDELA_172CD:
                memcpy(&b2[FIX_LEN_AID],
                       s6e88a0_ams427ap24_aid[CANDELA_111CD],
                       VAR_LEN_AID);
                break;
        case CANDELA_183CD ... CANDELA_300CD:
                memcpy(&b2[FIX_LEN_AID],
                       s6e88a0_ams427ap24_aid[CANDELA_111CD + 1],
                       VAR_LEN_AID);
                break;
        default:
                dev_err(dev, "Failed to get aid data\n");
                return -EINVAL;
        }

        /* get elvss */
        if (candela_enum <= CANDELA_111CD) {
                memcpy(&b6[FIX_LEN_ELVSS],
                       s6e88a0_ams427ap24_elvss[0],
                       VAR_LEN_ELVSS);
        } else {
                memcpy(&b6[FIX_LEN_ELVSS],
                       s6e88a0_ams427ap24_elvss[candela_enum - CANDELA_111CD],
                       VAR_LEN_ELVSS);
        }

        /* get gamma */
        ca[0] = 0xca;
        memcpy(&ca[FIX_LEN_GAMMA],
               s6e88a0_ams427ap24_gamma[candela_enum],
               VAR_LEN_GAMMA);

        /* write data */
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a); // level 1 key on
        mipi_dsi_dcs_write_buffer_multi(&dsi_ctx, b2, ARRAY_SIZE(b2)); // set aid
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x55, 0x00); // acl off
        mipi_dsi_dcs_write_buffer_multi(&dsi_ctx, b6, ARRAY_SIZE(b6)); // set elvss
        mipi_dsi_dcs_write_buffer_multi(&dsi_ctx, ca, ARRAY_SIZE(ca)); // set gamma
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf7, 0x03); // gamma update
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5); // level 1 key off

        return dsi_ctx.accum_err;
}

static void s6e88a0_ams427ap24_reset(struct s6e88a0_ams427ap24 *ctx)
{
        gpiod_set_value_cansleep(ctx->reset_gpio, 0);
        usleep_range(5000, 6000);
        gpiod_set_value_cansleep(ctx->reset_gpio, 1);
        usleep_range(1000, 2000);
        gpiod_set_value_cansleep(ctx->reset_gpio, 0);
        usleep_range(18000, 19000);
}

static int s6e88a0_ams427ap24_on(struct s6e88a0_ams427ap24 *ctx)
{
        struct mipi_dsi_device *dsi = ctx->dsi;
        struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
        struct device *dev = &dsi->dev;
        int ret;

        dsi->mode_flags |= MIPI_DSI_MODE_LPM;

        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a); // level 1 key on
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfc, 0x5a, 0x5a); // level 2 key on
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x11); // src latch set global 1
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfd, 0x11); // src latch set 1
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x13); // src latch set global 2
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfd, 0x18); // src latch set 2
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x02); // avdd set 1
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb8, 0x30); // avdd set 2

        mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
        mipi_dsi_msleep(&dsi_ctx, 20);

        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf1, 0x5a, 0x5a); // level 3 key on
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcc, 0x4c); // pixel clock divider pol.
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf2, 0x03, 0x0d); // unknown
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf1, 0xa5, 0xa5); // level 3 key off

        if (ctx->flip_horizontal)
                mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcb, 0x0e); // flip display

        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5); // level 1 key off
        mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfc, 0xa5, 0xa5); // level 2 key off

        ret = s6e88a0_ams427ap24_set_brightness(ctx->bl_dev);
        if (ret < 0) {
                dev_err(dev, "Failed to set brightness: %d\n", ret);
                return ret;
        }

        mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);

        return dsi_ctx.accum_err;
}

static int s6e88a0_ams427ap24_off(struct s6e88a0_ams427ap24 *ctx)
{
        struct mipi_dsi_device *dsi = ctx->dsi;
        struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

        dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;

        mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
        mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
        mipi_dsi_msleep(&dsi_ctx, 120);

        return dsi_ctx.accum_err;
}

static int s6e88a0_ams427ap24_prepare(struct drm_panel *panel)
{
        struct s6e88a0_ams427ap24 *ctx = to_s6e88a0_ams427ap24(panel);
        struct device *dev = &ctx->dsi->dev;
        int ret;

        ret = regulator_bulk_enable(ARRAY_SIZE(s6e88a0_ams427ap24_supplies),
                                    ctx->supplies);
        if (ret < 0) {
                dev_err(dev, "Failed to enable regulators: %d\n", ret);
                return ret;
        }

        s6e88a0_ams427ap24_reset(ctx);

        ret = s6e88a0_ams427ap24_on(ctx);
        if (ret < 0) {
                dev_err(dev, "Failed to initialize panel: %d\n", ret);
                gpiod_set_value_cansleep(ctx->reset_gpio, 1);
                regulator_bulk_disable(ARRAY_SIZE(s6e88a0_ams427ap24_supplies),
                                       ctx->supplies);
                return ret;
        }

        return 0;
}

static int s6e88a0_ams427ap24_unprepare(struct drm_panel *panel)
{
        struct s6e88a0_ams427ap24 *ctx = to_s6e88a0_ams427ap24(panel);
        struct device *dev = &ctx->dsi->dev;
        int ret;

        ret = s6e88a0_ams427ap24_off(ctx);
        if (ret < 0)
                dev_err(dev, "Failed to un-initialize panel: %d\n", ret);

        gpiod_set_value_cansleep(ctx->reset_gpio, 1);
        regulator_bulk_disable(ARRAY_SIZE(s6e88a0_ams427ap24_supplies),
                               ctx->supplies);

        return 0;
}

static const struct drm_display_mode s6e88a0_ams427ap24_mode = {
        .clock = (540 + 94 + 4 + 18) * (960 + 12 + 1 + 3) * 60 / 1000,
        .hdisplay = 540,
        .hsync_start = 540 + 94,
        .hsync_end = 540 + 94 + 4,
        .htotal = 540 + 94 + 4 + 18,
        .vdisplay = 960,
        .vsync_start = 960 + 12,
        .vsync_end = 960 + 12 + 1,
        .vtotal = 960 + 12 + 1 + 3,
        .width_mm = 55,
        .height_mm = 95,
        .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
};

static int s6e88a0_ams427ap24_get_modes(struct drm_panel *panel,
                                        struct drm_connector *connector)
{
        return drm_connector_helper_get_modes_fixed(connector,
                                                    &s6e88a0_ams427ap24_mode);
}

static const struct drm_panel_funcs s6e88a0_ams427ap24_panel_funcs = {
        .prepare = s6e88a0_ams427ap24_prepare,
        .unprepare = s6e88a0_ams427ap24_unprepare,
        .get_modes = s6e88a0_ams427ap24_get_modes,
};

static const struct backlight_ops s6e88a0_ams427ap24_bl_ops = {
        .update_status  = s6e88a0_ams427ap24_set_brightness,
};

static int s6e88a0_ams427ap24_register_backlight(struct s6e88a0_ams427ap24 *ctx)
{
        struct backlight_properties props = {
                .type           = BACKLIGHT_RAW,
                .brightness     = 180,
                .max_brightness = 255,
        };
        struct mipi_dsi_device *dsi = ctx->dsi;
        struct device *dev = &dsi->dev;
        int ret = 0;

        ctx->bl_dev = devm_backlight_device_register(dev, dev_name(dev), dev, ctx,
                                                     &s6e88a0_ams427ap24_bl_ops,
                                                     &props);
        if (IS_ERR(ctx->bl_dev)) {
                ret = PTR_ERR(ctx->bl_dev);
                dev_err(dev, "error registering backlight device (%d)\n", ret);
        }

        return ret;
}

static int s6e88a0_ams427ap24_probe(struct mipi_dsi_device *dsi)
{
        struct device *dev = &dsi->dev;
        struct s6e88a0_ams427ap24 *ctx;
        int ret;

        ctx = devm_drm_panel_alloc(dev, struct s6e88a0_ams427ap24, panel,
                                   &s6e88a0_ams427ap24_panel_funcs,
                                   DRM_MODE_CONNECTOR_DSI);
        if (IS_ERR(ctx))
                return PTR_ERR(ctx);

        ret = devm_regulator_bulk_get_const(dev,
                                      ARRAY_SIZE(s6e88a0_ams427ap24_supplies),
                                      s6e88a0_ams427ap24_supplies,
                                      &ctx->supplies);
        if (ret < 0)
                return ret;

        ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
        if (IS_ERR(ctx->reset_gpio))
                return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
                                     "Failed to get reset-gpios\n");

        ctx->dsi = dsi;
        mipi_dsi_set_drvdata(dsi, ctx);

        dsi->lanes = 2;
        dsi->format = MIPI_DSI_FMT_RGB888;
        dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
                          MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_NO_HFP;

        ctx->panel.prepare_prev_first = true;

        ctx->flip_horizontal = device_property_read_bool(dev, "flip-horizontal");

        ret = s6e88a0_ams427ap24_register_backlight(ctx);
        if (ret < 0)
                return ret;

        drm_panel_add(&ctx->panel);

        ret = mipi_dsi_attach(dsi);
        if (ret < 0) {
                dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
                drm_panel_remove(&ctx->panel);
                return ret;
        }

        return 0;
}

static void s6e88a0_ams427ap24_remove(struct mipi_dsi_device *dsi)
{
        struct s6e88a0_ams427ap24 *ctx = mipi_dsi_get_drvdata(dsi);
        int ret;

        ret = mipi_dsi_detach(dsi);
        if (ret < 0)
                dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);

        drm_panel_remove(&ctx->panel);
}

static const struct of_device_id s6e88a0_ams427ap24_of_match[] = {
        { .compatible = "samsung,s6e88a0-ams427ap24" },
        { /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, s6e88a0_ams427ap24_of_match);

static struct mipi_dsi_driver s6e88a0_ams427ap24_driver = {
        .probe = s6e88a0_ams427ap24_probe,
        .remove = s6e88a0_ams427ap24_remove,
        .driver = {
                .name = "panel-s6e88a0-ams427ap24",
                .of_match_table = s6e88a0_ams427ap24_of_match,
        },
};
module_mipi_dsi_driver(s6e88a0_ams427ap24_driver);

MODULE_AUTHOR("Jakob Hauser <jahau@rocketmail.com>");
MODULE_DESCRIPTION("Samsung AMS427AP24 panel with S6E88A0 controller");
MODULE_LICENSE("GPL v2");