| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * S6E63M0 AMOLED LCD drm_panel driver. |
| * |
| * Copyright (C) 2019 Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com> |
| * Derived from drivers/gpu/drm/panel-samsung-ld9040.c |
| * |
| * Andrzej Hajda <a.hajda@samsung.com> |
| */ |
| |
| #include <drm/drm_modes.h> |
| #include <drm/drm_panel.h> |
| |
| #include <linux/backlight.h> |
| #include <linux/delay.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/module.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/media-bus-format.h> |
| |
| #include <video/mipi_display.h> |
| |
| #include "panel-samsung-s6e63m0.h" |
| |
| #define S6E63M0_LCD_ID_VALUE_M2 0xA4 |
| #define S6E63M0_LCD_ID_VALUE_SM2 0xB4 |
| #define S6E63M0_LCD_ID_VALUE_SM2_1 0xB6 |
| |
| #define NUM_GAMMA_LEVELS 28 |
| #define GAMMA_TABLE_COUNT 23 |
| |
| #define MAX_BRIGHTNESS (NUM_GAMMA_LEVELS - 1) |
| |
| /* array of gamma tables for gamma value 2.2 */ |
| static u8 const s6e63m0_gamma_22[NUM_GAMMA_LEVELS][GAMMA_TABLE_COUNT] = { |
| /* 30 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0xA1, 0x51, 0x7B, 0xCE, |
| 0xCB, 0xC2, 0xC7, 0xCB, 0xBC, 0xDA, 0xDD, |
| 0xD3, 0x00, 0x53, 0x00, 0x52, 0x00, 0x6F, }, |
| /* 40 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x97, 0x58, 0x71, 0xCC, |
| 0xCB, 0xC0, 0xC5, 0xC9, 0xBA, 0xD9, 0xDC, |
| 0xD1, 0x00, 0x5B, 0x00, 0x5A, 0x00, 0x7A, }, |
| /* 50 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x96, 0x58, 0x72, 0xCB, |
| 0xCA, 0xBF, 0xC6, 0xC9, 0xBA, 0xD6, 0xD9, |
| 0xCD, 0x00, 0x61, 0x00, 0x61, 0x00, 0x83, }, |
| /* 60 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x91, 0x5E, 0x6E, 0xC9, |
| 0xC9, 0xBD, 0xC4, 0xC9, 0xB8, 0xD3, 0xD7, |
| 0xCA, 0x00, 0x69, 0x00, 0x67, 0x00, 0x8D, }, |
| /* 70 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x8E, 0x62, 0x6B, 0xC7, |
| 0xC9, 0xBB, 0xC3, 0xC7, 0xB7, 0xD3, 0xD7, |
| 0xCA, 0x00, 0x6E, 0x00, 0x6C, 0x00, 0x94, }, |
| /* 80 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x89, 0x68, 0x65, 0xC9, |
| 0xC9, 0xBC, 0xC1, 0xC5, 0xB6, 0xD2, 0xD5, |
| 0xC9, 0x00, 0x73, 0x00, 0x72, 0x00, 0x9A, }, |
| /* 90 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x89, 0x69, 0x64, 0xC7, |
| 0xC8, 0xBB, 0xC0, 0xC5, 0xB4, 0xD2, 0xD5, |
| 0xC9, 0x00, 0x77, 0x00, 0x76, 0x00, 0xA0, }, |
| /* 100 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x86, 0x69, 0x60, 0xC6, |
| 0xC8, 0xBA, 0xBF, 0xC4, 0xB4, 0xD0, 0xD4, |
| 0xC6, 0x00, 0x7C, 0x00, 0x7A, 0x00, 0xA7, }, |
| /* 110 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x86, 0x6A, 0x60, 0xC5, |
| 0xC7, 0xBA, 0xBD, 0xC3, 0xB2, 0xD0, 0xD4, |
| 0xC5, 0x00, 0x80, 0x00, 0x7E, 0x00, 0xAD, }, |
| /* 120 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x82, 0x6B, 0x5E, 0xC4, |
| 0xC8, 0xB9, 0xBD, 0xC2, 0xB1, 0xCE, 0xD2, |
| 0xC4, 0x00, 0x85, 0x00, 0x82, 0x00, 0xB3, }, |
| /* 130 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x8C, 0x6C, 0x60, 0xC3, |
| 0xC7, 0xB9, 0xBC, 0xC1, 0xAF, 0xCE, 0xD2, |
| 0xC3, 0x00, 0x88, 0x00, 0x86, 0x00, 0xB8, }, |
| /* 140 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x80, 0x6C, 0x5F, 0xC1, |
| 0xC6, 0xB7, 0xBC, 0xC1, 0xAE, 0xCD, 0xD0, |
| 0xC2, 0x00, 0x8C, 0x00, 0x8A, 0x00, 0xBE, }, |
| /* 150 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x80, 0x6E, 0x5F, 0xC1, |
| 0xC6, 0xB6, 0xBC, 0xC0, 0xAE, 0xCC, 0xD0, |
| 0xC2, 0x00, 0x8F, 0x00, 0x8D, 0x00, 0xC2, }, |
| /* 160 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x7F, 0x6E, 0x5F, 0xC0, |
| 0xC6, 0xB5, 0xBA, 0xBF, 0xAD, 0xCB, 0xCF, |
| 0xC0, 0x00, 0x94, 0x00, 0x91, 0x00, 0xC8, }, |
| /* 170 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x7C, 0x6D, 0x5C, 0xC0, |
| 0xC6, 0xB4, 0xBB, 0xBE, 0xAD, 0xCA, 0xCF, |
| 0xC0, 0x00, 0x96, 0x00, 0x94, 0x00, 0xCC, }, |
| /* 180 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x7B, 0x6D, 0x5B, 0xC0, |
| 0xC5, 0xB3, 0xBA, 0xBE, 0xAD, 0xCA, 0xCE, |
| 0xBF, 0x00, 0x99, 0x00, 0x97, 0x00, 0xD0, }, |
| /* 190 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x7A, 0x6D, 0x59, 0xC1, |
| 0xC5, 0xB4, 0xB8, 0xBD, 0xAC, 0xC9, 0xCE, |
| 0xBE, 0x00, 0x9D, 0x00, 0x9A, 0x00, 0xD5, }, |
| /* 200 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x79, 0x6D, 0x58, 0xC1, |
| 0xC4, 0xB4, 0xB6, 0xBD, 0xAA, 0xCA, 0xCD, |
| 0xBE, 0x00, 0x9F, 0x00, 0x9D, 0x00, 0xD9, }, |
| /* 210 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x79, 0x6D, 0x57, 0xC0, |
| 0xC4, 0xB4, 0xB7, 0xBD, 0xAA, 0xC8, 0xCC, |
| 0xBD, 0x00, 0xA2, 0x00, 0xA0, 0x00, 0xDD, }, |
| /* 220 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x78, 0x6F, 0x58, 0xBF, |
| 0xC4, 0xB3, 0xB5, 0xBB, 0xA9, 0xC8, 0xCC, |
| 0xBC, 0x00, 0xA6, 0x00, 0xA3, 0x00, 0xE2, }, |
| /* 230 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x75, 0x6F, 0x56, 0xBF, |
| 0xC3, 0xB2, 0xB6, 0xBB, 0xA8, 0xC7, 0xCB, |
| 0xBC, 0x00, 0xA8, 0x00, 0xA6, 0x00, 0xE6, }, |
| /* 240 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x76, 0x6F, 0x56, 0xC0, |
| 0xC3, 0xB2, 0xB5, 0xBA, 0xA8, 0xC6, 0xCB, |
| 0xBB, 0x00, 0xAA, 0x00, 0xA8, 0x00, 0xE9, }, |
| /* 250 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x74, 0x6D, 0x54, 0xBF, |
| 0xC3, 0xB2, 0xB4, 0xBA, 0xA7, 0xC6, 0xCA, |
| 0xBA, 0x00, 0xAD, 0x00, 0xAB, 0x00, 0xED, }, |
| /* 260 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x74, 0x6E, 0x54, 0xBD, |
| 0xC2, 0xB0, 0xB5, 0xBA, 0xA7, 0xC5, 0xC9, |
| 0xBA, 0x00, 0xB0, 0x00, 0xAE, 0x00, 0xF1, }, |
| /* 270 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x71, 0x6C, 0x50, 0xBD, |
| 0xC3, 0xB0, 0xB4, 0xB8, 0xA6, 0xC6, 0xC9, |
| 0xBB, 0x00, 0xB2, 0x00, 0xB1, 0x00, 0xF4, }, |
| /* 280 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x6E, 0x6C, 0x4D, 0xBE, |
| 0xC3, 0xB1, 0xB3, 0xB8, 0xA5, 0xC6, 0xC8, |
| 0xBB, 0x00, 0xB4, 0x00, 0xB3, 0x00, 0xF7, }, |
| /* 290 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x71, 0x70, 0x50, 0xBD, |
| 0xC1, 0xB0, 0xB2, 0xB8, 0xA4, 0xC6, 0xC7, |
| 0xBB, 0x00, 0xB6, 0x00, 0xB6, 0x00, 0xFA, }, |
| /* 300 cd */ |
| { MCS_PGAMMACTL, 0x02, |
| 0x18, 0x08, 0x24, 0x70, 0x6E, 0x4E, 0xBC, |
| 0xC0, 0xAF, 0xB3, 0xB8, 0xA5, 0xC5, 0xC7, |
| 0xBB, 0x00, 0xB9, 0x00, 0xB8, 0x00, 0xFC, }, |
| }; |
| |
| #define NUM_ACL_LEVELS 7 |
| #define ACL_TABLE_COUNT 28 |
| |
| static u8 const s6e63m0_acl[NUM_ACL_LEVELS][ACL_TABLE_COUNT] = { |
| /* NULL ACL */ |
| { MCS_BCMODE, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00 }, |
| /* 40P ACL */ |
| { MCS_BCMODE, |
| 0x4D, 0x96, 0x1D, 0x00, 0x00, 0x01, 0xDF, 0x00, |
| 0x00, 0x03, 0x1F, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x01, 0x06, 0x0C, 0x11, 0x16, 0x1C, 0x21, 0x26, |
| 0x2B, 0x31, 0x36 }, |
| /* 43P ACL */ |
| { MCS_BCMODE, |
| 0x4D, 0x96, 0x1D, 0x00, 0x00, 0x01, 0xDF, 0x00, |
| 0x00, 0x03, 0x1F, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x01, 0x07, 0x0C, 0x12, 0x18, 0x1E, 0x23, 0x29, |
| 0x2F, 0x34, 0x3A }, |
| /* 45P ACL */ |
| { MCS_BCMODE, |
| 0x4D, 0x96, 0x1D, 0x00, 0x00, 0x01, 0xDF, 0x00, |
| 0x00, 0x03, 0x1F, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x01, 0x07, 0x0D, 0x13, 0x19, 0x1F, 0x25, 0x2B, |
| 0x31, 0x37, 0x3D }, |
| /* 47P ACL */ |
| { MCS_BCMODE, |
| 0x4D, 0x96, 0x1D, 0x00, 0x00, 0x01, 0xDF, 0x00, |
| 0x00, 0x03, 0x1F, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x01, 0x07, 0x0E, 0x14, 0x1B, 0x21, 0x27, 0x2E, |
| 0x34, 0x3B, 0x41 }, |
| /* 48P ACL */ |
| { MCS_BCMODE, |
| 0x4D, 0x96, 0x1D, 0x00, 0x00, 0x01, 0xDF, 0x00, |
| 0x00, 0x03, 0x1F, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x01, 0x08, 0x0E, 0x15, 0x1B, 0x22, 0x29, 0x2F, |
| 0x36, 0x3C, 0x43 }, |
| /* 50P ACL */ |
| { MCS_BCMODE, |
| 0x4D, 0x96, 0x1D, 0x00, 0x00, 0x01, 0xDF, 0x00, |
| 0x00, 0x03, 0x1F, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x01, 0x08, 0x0F, 0x16, 0x1D, 0x24, 0x2A, 0x31, |
| 0x38, 0x3F, 0x46 }, |
| }; |
| |
| /* This tells us which ACL level goes with which gamma */ |
| static u8 const s6e63m0_acl_per_gamma[NUM_GAMMA_LEVELS] = { |
| /* 30 - 60 cd: ACL off/NULL */ |
| 0, 0, 0, 0, |
| /* 70 - 250 cd: 40P ACL */ |
| 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
| /* 260 - 300 cd: 50P ACL */ |
| 6, 6, 6, 6, 6, |
| }; |
| |
| /* The ELVSS backlight regulator has 5 levels */ |
| #define S6E63M0_ELVSS_LEVELS 5 |
| |
| static u8 const s6e63m0_elvss_offsets[S6E63M0_ELVSS_LEVELS] = { |
| 0x00, /* not set */ |
| 0x0D, /* 30 cd - 100 cd */ |
| 0x09, /* 110 cd - 160 cd */ |
| 0x07, /* 170 cd - 200 cd */ |
| 0x00, /* 210 cd - 300 cd */ |
| }; |
| |
| /* This tells us which ELVSS level goes with which gamma */ |
| static u8 const s6e63m0_elvss_per_gamma[NUM_GAMMA_LEVELS] = { |
| /* 30 - 100 cd */ |
| 1, 1, 1, 1, 1, 1, 1, 1, |
| /* 110 - 160 cd */ |
| 2, 2, 2, 2, 2, 2, |
| /* 170 - 200 cd */ |
| 3, 3, 3, 3, |
| /* 210 - 300 cd */ |
| 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
| }; |
| |
| struct s6e63m0 { |
| struct device *dev; |
| void *transport_data; |
| int (*dcs_read)(struct device *dev, void *trsp, const u8 cmd, u8 *val); |
| int (*dcs_write)(struct device *dev, void *trsp, const u8 *data, size_t len); |
| struct drm_panel panel; |
| struct backlight_device *bl_dev; |
| u8 lcd_type; |
| u8 elvss_pulse; |
| bool dsi_mode; |
| |
| struct regulator_bulk_data supplies[2]; |
| struct gpio_desc *reset_gpio; |
| |
| bool prepared; |
| bool enabled; |
| |
| /* |
| * This field is tested by functions directly accessing bus before |
| * transfer, transfer is skipped if it is set. In case of transfer |
| * failure or unexpected response the field is set to error value. |
| * Such construct allows to eliminate many checks in higher level |
| * functions. |
| */ |
| int error; |
| }; |
| |
| static const struct drm_display_mode default_mode = { |
| .clock = 25628, |
| .hdisplay = 480, |
| .hsync_start = 480 + 16, |
| .hsync_end = 480 + 16 + 2, |
| .htotal = 480 + 16 + 2 + 16, |
| .vdisplay = 800, |
| .vsync_start = 800 + 28, |
| .vsync_end = 800 + 28 + 2, |
| .vtotal = 800 + 28 + 2 + 1, |
| .width_mm = 53, |
| .height_mm = 89, |
| .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, |
| }; |
| |
| static inline struct s6e63m0 *panel_to_s6e63m0(struct drm_panel *panel) |
| { |
| return container_of(panel, struct s6e63m0, panel); |
| } |
| |
| static int s6e63m0_clear_error(struct s6e63m0 *ctx) |
| { |
| int ret = ctx->error; |
| |
| ctx->error = 0; |
| return ret; |
| } |
| |
| static void s6e63m0_dcs_read(struct s6e63m0 *ctx, const u8 cmd, u8 *data) |
| { |
| if (ctx->error < 0) |
| return; |
| |
| ctx->error = ctx->dcs_read(ctx->dev, ctx->transport_data, cmd, data); |
| } |
| |
| static void s6e63m0_dcs_write(struct s6e63m0 *ctx, const u8 *data, size_t len) |
| { |
| if (ctx->error < 0 || len == 0) |
| return; |
| |
| ctx->error = ctx->dcs_write(ctx->dev, ctx->transport_data, data, len); |
| } |
| |
| #define s6e63m0_dcs_write_seq_static(ctx, seq ...) \ |
| ({ \ |
| static const u8 d[] = { seq }; \ |
| s6e63m0_dcs_write(ctx, d, ARRAY_SIZE(d)); \ |
| }) |
| |
| static int s6e63m0_check_lcd_type(struct s6e63m0 *ctx) |
| { |
| u8 id1, id2, id3; |
| int ret; |
| |
| s6e63m0_dcs_read(ctx, MCS_READ_ID1, &id1); |
| s6e63m0_dcs_read(ctx, MCS_READ_ID2, &id2); |
| s6e63m0_dcs_read(ctx, MCS_READ_ID3, &id3); |
| |
| ret = s6e63m0_clear_error(ctx); |
| if (ret) { |
| dev_err(ctx->dev, "error checking LCD type (%d)\n", ret); |
| ctx->lcd_type = 0x00; |
| return ret; |
| } |
| |
| dev_info(ctx->dev, "MTP ID: %02x %02x %02x\n", id1, id2, id3); |
| |
| /* |
| * We attempt to detect what panel is mounted on the controller. |
| * The third ID byte represents the desired ELVSS pulse for |
| * some displays. |
| */ |
| switch (id2) { |
| case S6E63M0_LCD_ID_VALUE_M2: |
| dev_info(ctx->dev, "detected LCD panel AMS397GE MIPI M2\n"); |
| ctx->elvss_pulse = id3; |
| break; |
| case S6E63M0_LCD_ID_VALUE_SM2: |
| case S6E63M0_LCD_ID_VALUE_SM2_1: |
| dev_info(ctx->dev, "detected LCD panel AMS397GE MIPI SM2\n"); |
| ctx->elvss_pulse = id3; |
| break; |
| default: |
| dev_info(ctx->dev, "unknown LCD panel type %02x\n", id2); |
| /* Default ELVSS pulse level */ |
| ctx->elvss_pulse = 0x16; |
| break; |
| } |
| |
| ctx->lcd_type = id2; |
| |
| return 0; |
| } |
| |
| static void s6e63m0_init(struct s6e63m0 *ctx) |
| { |
| /* |
| * We do not know why there is a difference in the DSI mode. |
| * (No datasheet.) |
| * |
| * In the vendor driver this sequence is called |
| * "SEQ_PANEL_CONDITION_SET" or "DCS_CMD_SEQ_PANEL_COND_SET". |
| */ |
| if (ctx->dsi_mode) |
| s6e63m0_dcs_write_seq_static(ctx, MCS_PANELCTL, |
| 0x01, 0x2c, 0x2c, 0x07, 0x07, 0x5f, 0xb3, |
| 0x6d, 0x97, 0x1d, 0x3a, 0x0f, 0x00, 0x00); |
| else |
| s6e63m0_dcs_write_seq_static(ctx, MCS_PANELCTL, |
| 0x01, 0x27, 0x27, 0x07, 0x07, 0x54, 0x9f, |
| 0x63, 0x8f, 0x1a, 0x33, 0x0d, 0x00, 0x00); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_DISCTL, |
| 0x02, 0x03, 0x1c, 0x10, 0x10); |
| s6e63m0_dcs_write_seq_static(ctx, MCS_IFCTL, |
| 0x03, 0x00, 0x00); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_PGAMMACTL, |
| 0x00, 0x18, 0x08, 0x24, 0x64, 0x56, 0x33, |
| 0xb6, 0xba, 0xa8, 0xac, 0xb1, 0x9d, 0xc1, |
| 0xc1, 0xb7, 0x00, 0x9c, 0x00, 0x9f, 0x00, |
| 0xd6); |
| s6e63m0_dcs_write_seq_static(ctx, MCS_PGAMMACTL, |
| 0x01); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_SRCCTL, |
| 0x00, 0x8e, 0x07); |
| s6e63m0_dcs_write_seq_static(ctx, MCS_PENTILE_1, 0x6c); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_Y_RED, |
| 0x2c, 0x12, 0x0c, 0x0a, 0x10, 0x0e, 0x17, |
| 0x13, 0x1f, 0x1a, 0x2a, 0x24, 0x1f, 0x1b, |
| 0x1a, 0x17, 0x2b, 0x26, 0x22, 0x20, 0x3a, |
| 0x34, 0x30, 0x2c, 0x29, 0x26, 0x25, 0x23, |
| 0x21, 0x20, 0x1e, 0x1e); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_X_RED, |
| 0x00, 0x00, 0x11, 0x22, 0x33, 0x44, 0x44, |
| 0x44, 0x55, 0x55, 0x66, 0x66, 0x66, 0x66, |
| 0x66, 0x66); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_Y_GREEN, |
| 0x2c, 0x12, 0x0c, 0x0a, 0x10, 0x0e, 0x17, |
| 0x13, 0x1f, 0x1a, 0x2a, 0x24, 0x1f, 0x1b, |
| 0x1a, 0x17, 0x2b, 0x26, 0x22, 0x20, 0x3a, |
| 0x34, 0x30, 0x2c, 0x29, 0x26, 0x25, 0x23, |
| 0x21, 0x20, 0x1e, 0x1e); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_X_GREEN, |
| 0x00, 0x00, 0x11, 0x22, 0x33, 0x44, 0x44, |
| 0x44, 0x55, 0x55, 0x66, 0x66, 0x66, 0x66, |
| 0x66, 0x66); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_Y_BLUE, |
| 0x2c, 0x12, 0x0c, 0x0a, 0x10, 0x0e, 0x17, |
| 0x13, 0x1f, 0x1a, 0x2a, 0x24, 0x1f, 0x1b, |
| 0x1a, 0x17, 0x2b, 0x26, 0x22, 0x20, 0x3a, |
| 0x34, 0x30, 0x2c, 0x29, 0x26, 0x25, 0x23, |
| 0x21, 0x20, 0x1e, 0x1e); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_GAMMA_DELTA_X_BLUE, |
| 0x00, 0x00, 0x11, 0x22, 0x33, 0x44, 0x44, |
| 0x44, 0x55, 0x55, 0x66, 0x66, 0x66, 0x66, |
| 0x66, 0x66); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_BCMODE, |
| 0x4d, 0x96, 0x1d, 0x00, 0x00, 0x01, 0xdf, |
| 0x00, 0x00, 0x03, 0x1f, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x06, |
| 0x09, 0x0d, 0x0f, 0x12, 0x15, 0x18); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_TEMP_SWIRE, |
| 0x10, 0x10, 0x0b, 0x05); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_MIECTL1, |
| 0x01); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_ELVSS_ON, |
| 0x0b); |
| } |
| |
| static int s6e63m0_power_on(struct s6e63m0 *ctx) |
| { |
| int ret; |
| |
| ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); |
| if (ret < 0) |
| return ret; |
| |
| msleep(25); |
| |
| /* Be sure to send a reset pulse */ |
| gpiod_set_value(ctx->reset_gpio, 1); |
| msleep(5); |
| gpiod_set_value(ctx->reset_gpio, 0); |
| msleep(120); |
| |
| return 0; |
| } |
| |
| static int s6e63m0_power_off(struct s6e63m0 *ctx) |
| { |
| int ret; |
| |
| gpiod_set_value(ctx->reset_gpio, 1); |
| msleep(120); |
| |
| ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int s6e63m0_disable(struct drm_panel *panel) |
| { |
| struct s6e63m0 *ctx = panel_to_s6e63m0(panel); |
| |
| if (!ctx->enabled) |
| return 0; |
| |
| backlight_disable(ctx->bl_dev); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MIPI_DCS_SET_DISPLAY_OFF); |
| msleep(10); |
| s6e63m0_dcs_write_seq_static(ctx, MIPI_DCS_ENTER_SLEEP_MODE); |
| msleep(120); |
| |
| ctx->enabled = false; |
| |
| return 0; |
| } |
| |
| static int s6e63m0_unprepare(struct drm_panel *panel) |
| { |
| struct s6e63m0 *ctx = panel_to_s6e63m0(panel); |
| int ret; |
| |
| if (!ctx->prepared) |
| return 0; |
| |
| s6e63m0_clear_error(ctx); |
| |
| ret = s6e63m0_power_off(ctx); |
| if (ret < 0) |
| return ret; |
| |
| ctx->prepared = false; |
| |
| return 0; |
| } |
| |
| static int s6e63m0_prepare(struct drm_panel *panel) |
| { |
| struct s6e63m0 *ctx = panel_to_s6e63m0(panel); |
| int ret; |
| |
| if (ctx->prepared) |
| return 0; |
| |
| ret = s6e63m0_power_on(ctx); |
| if (ret < 0) |
| return ret; |
| |
| /* Magic to unlock level 2 control of the display */ |
| s6e63m0_dcs_write_seq_static(ctx, MCS_LEVEL_2_KEY, 0x5a, 0x5a); |
| /* Magic to unlock MTP reading */ |
| s6e63m0_dcs_write_seq_static(ctx, MCS_MTP_KEY, 0x5a, 0x5a); |
| |
| ret = s6e63m0_check_lcd_type(ctx); |
| if (ret < 0) |
| return ret; |
| |
| s6e63m0_init(ctx); |
| |
| ret = s6e63m0_clear_error(ctx); |
| |
| if (ret < 0) |
| s6e63m0_unprepare(panel); |
| |
| ctx->prepared = true; |
| |
| return ret; |
| } |
| |
| static int s6e63m0_enable(struct drm_panel *panel) |
| { |
| struct s6e63m0 *ctx = panel_to_s6e63m0(panel); |
| |
| if (ctx->enabled) |
| return 0; |
| |
| s6e63m0_dcs_write_seq_static(ctx, MIPI_DCS_EXIT_SLEEP_MODE); |
| msleep(120); |
| s6e63m0_dcs_write_seq_static(ctx, MIPI_DCS_SET_DISPLAY_ON); |
| msleep(10); |
| |
| s6e63m0_dcs_write_seq_static(ctx, MCS_ERROR_CHECK, |
| 0xE7, 0x14, 0x60, 0x17, 0x0A, 0x49, 0xC3, |
| 0x8F, 0x19, 0x64, 0x91, 0x84, 0x76, 0x20, |
| 0x0F, 0x00); |
| |
| backlight_enable(ctx->bl_dev); |
| |
| ctx->enabled = true; |
| |
| return 0; |
| } |
| |
| static int s6e63m0_get_modes(struct drm_panel *panel, |
| struct drm_connector *connector) |
| { |
| struct drm_display_mode *mode; |
| static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; |
| |
| mode = drm_mode_duplicate(connector->dev, &default_mode); |
| if (!mode) { |
| dev_err(panel->dev, "failed to add mode %ux%u@%u\n", |
| default_mode.hdisplay, default_mode.vdisplay, |
| drm_mode_vrefresh(&default_mode)); |
| return -ENOMEM; |
| } |
| |
| connector->display_info.width_mm = mode->width_mm; |
| connector->display_info.height_mm = mode->height_mm; |
| drm_display_info_set_bus_formats(&connector->display_info, |
| &bus_format, 1); |
| connector->display_info.bus_flags = DRM_BUS_FLAG_DE_LOW | |
| DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; |
| |
| drm_mode_set_name(mode); |
| |
| mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; |
| drm_mode_probed_add(connector, mode); |
| |
| return 1; |
| } |
| |
| static const struct drm_panel_funcs s6e63m0_drm_funcs = { |
| .disable = s6e63m0_disable, |
| .unprepare = s6e63m0_unprepare, |
| .prepare = s6e63m0_prepare, |
| .enable = s6e63m0_enable, |
| .get_modes = s6e63m0_get_modes, |
| }; |
| |
| static int s6e63m0_set_brightness(struct backlight_device *bd) |
| { |
| struct s6e63m0 *ctx = bl_get_data(bd); |
| int brightness = bd->props.brightness; |
| u8 elvss_val; |
| u8 elvss_cmd_set[5]; |
| int i; |
| |
| /* Adjust ELVSS to candela level */ |
| i = s6e63m0_elvss_per_gamma[brightness]; |
| elvss_val = ctx->elvss_pulse + s6e63m0_elvss_offsets[i]; |
| if (elvss_val > 0x1f) |
| elvss_val = 0x1f; |
| elvss_cmd_set[0] = MCS_TEMP_SWIRE; |
| elvss_cmd_set[1] = elvss_val; |
| elvss_cmd_set[2] = elvss_val; |
| elvss_cmd_set[3] = elvss_val; |
| elvss_cmd_set[4] = elvss_val; |
| s6e63m0_dcs_write(ctx, elvss_cmd_set, 5); |
| |
| /* Update the ACL per gamma value */ |
| i = s6e63m0_acl_per_gamma[brightness]; |
| s6e63m0_dcs_write(ctx, s6e63m0_acl[i], |
| ARRAY_SIZE(s6e63m0_acl[i])); |
| |
| /* Update gamma table */ |
| s6e63m0_dcs_write(ctx, s6e63m0_gamma_22[brightness], |
| ARRAY_SIZE(s6e63m0_gamma_22[brightness])); |
| s6e63m0_dcs_write_seq_static(ctx, MCS_PGAMMACTL, 0x03); |
| |
| |
| return s6e63m0_clear_error(ctx); |
| } |
| |
| static const struct backlight_ops s6e63m0_backlight_ops = { |
| .update_status = s6e63m0_set_brightness, |
| }; |
| |
| static int s6e63m0_backlight_register(struct s6e63m0 *ctx, u32 max_brightness) |
| { |
| struct backlight_properties props = { |
| .type = BACKLIGHT_RAW, |
| .brightness = max_brightness, |
| .max_brightness = max_brightness, |
| }; |
| struct device *dev = ctx->dev; |
| int ret = 0; |
| |
| ctx->bl_dev = devm_backlight_device_register(dev, "panel", dev, ctx, |
| &s6e63m0_backlight_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; |
| } |
| |
| int s6e63m0_probe(struct device *dev, void *trsp, |
| int (*dcs_read)(struct device *dev, void *trsp, const u8 cmd, u8 *val), |
| int (*dcs_write)(struct device *dev, void *trsp, const u8 *data, size_t len), |
| bool dsi_mode) |
| { |
| struct s6e63m0 *ctx; |
| u32 max_brightness; |
| int ret; |
| |
| ctx = devm_kzalloc(dev, sizeof(struct s6e63m0), GFP_KERNEL); |
| if (!ctx) |
| return -ENOMEM; |
| |
| ctx->transport_data = trsp; |
| ctx->dsi_mode = dsi_mode; |
| ctx->dcs_read = dcs_read; |
| ctx->dcs_write = dcs_write; |
| dev_set_drvdata(dev, ctx); |
| |
| ctx->dev = dev; |
| ctx->enabled = false; |
| ctx->prepared = false; |
| |
| ret = device_property_read_u32(dev, "max-brightness", &max_brightness); |
| if (ret) |
| max_brightness = MAX_BRIGHTNESS; |
| if (max_brightness > MAX_BRIGHTNESS) { |
| dev_err(dev, "illegal max brightness specified\n"); |
| max_brightness = MAX_BRIGHTNESS; |
| } |
| |
| ctx->supplies[0].supply = "vdd3"; |
| ctx->supplies[1].supply = "vci"; |
| ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), |
| ctx->supplies); |
| if (ret < 0) { |
| dev_err(dev, "failed to get regulators: %d\n", ret); |
| return ret; |
| } |
| |
| ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); |
| if (IS_ERR(ctx->reset_gpio)) { |
| dev_err(dev, "cannot get reset-gpios %ld\n", PTR_ERR(ctx->reset_gpio)); |
| return PTR_ERR(ctx->reset_gpio); |
| } |
| |
| drm_panel_init(&ctx->panel, dev, &s6e63m0_drm_funcs, |
| dsi_mode ? DRM_MODE_CONNECTOR_DSI : |
| DRM_MODE_CONNECTOR_DPI); |
| |
| ret = s6e63m0_backlight_register(ctx, max_brightness); |
| if (ret < 0) |
| return ret; |
| |
| drm_panel_add(&ctx->panel); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(s6e63m0_probe); |
| |
| void s6e63m0_remove(struct device *dev) |
| { |
| struct s6e63m0 *ctx = dev_get_drvdata(dev); |
| |
| drm_panel_remove(&ctx->panel); |
| } |
| EXPORT_SYMBOL_GPL(s6e63m0_remove); |
| |
| MODULE_AUTHOR("Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>"); |
| MODULE_DESCRIPTION("s6e63m0 LCD Driver"); |
| MODULE_LICENSE("GPL v2"); |
