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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (c) 2021, Linaro Limited4 *5 * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:6 * Copyright (c) 2013, The Linux Foundation. All rights reserved.7 */8 9#include <linux/backlight.h>10#include <linux/delay.h>11#include <linux/gpio/consumer.h>12#include <linux/module.h>13#include <linux/of.h>14#include <linux/regulator/consumer.h>15 16#include <drm/drm_mipi_dsi.h>17#include <drm/drm_modes.h>18#include <drm/drm_panel.h>19 20struct truly_nt35521 {21 struct drm_panel panel;22 struct mipi_dsi_device *dsi;23 struct regulator_bulk_data supplies[2];24 struct gpio_desc *reset_gpio;25 struct gpio_desc *blen_gpio;26};27 28#define NT35521_DCS_SWITCH_PAGE 0xf029 30#define nt35521_switch_page(dsi_ctx, page) \31 mipi_dsi_dcs_write_seq_multi(dsi_ctx, NT35521_DCS_SWITCH_PAGE, \32 0x55, 0xaa, 0x52, 0x08, (page))33 34static inline35struct truly_nt35521 *to_truly_nt35521(struct drm_panel *panel)36{37 return container_of(panel, struct truly_nt35521, panel);38}39 40static void truly_nt35521_reset(struct truly_nt35521 *ctx)41{42 gpiod_set_value_cansleep(ctx->reset_gpio, 1);43 usleep_range(1000, 2000);44 gpiod_set_value_cansleep(ctx->reset_gpio, 1);45 usleep_range(10000, 11000);46 gpiod_set_value_cansleep(ctx->reset_gpio, 0);47 msleep(150);48}49 50static int truly_nt35521_on(struct truly_nt35521 *ctx)51{52 struct mipi_dsi_device *dsi = ctx->dsi;53 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };54 55 dsi->mode_flags |= MIPI_DSI_MODE_LPM;56 57 nt35521_switch_page(&dsi_ctx, 0x00);58 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xff, 0xaa, 0x55, 0xa5, 0x80);59 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x11, 0x00);60 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf7, 0x20, 0x00);61 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x01);62 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x21);63 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x01, 0xa0, 0x10, 0x08, 0x01);64 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8, 0x01, 0x02, 0x0c, 0x02);65 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x11, 0x11);66 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x00, 0x00);67 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6, 0x02);68 69 nt35521_switch_page(&dsi_ctx, 0x01);70 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x09, 0x09);71 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x09, 0x09);72 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x8c, 0x00);73 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x8c, 0x00);74 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xca, 0x00);75 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x04);76 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbe, 0xb5);77 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x35, 0x35);78 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x25, 0x25);79 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x43, 0x43);80 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x24, 0x24);81 82 nt35521_switch_page(&dsi_ctx, 0x02);83 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xee, 0x03);84 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0,85 0x00, 0xb2, 0x00, 0xb3, 0x00, 0xb6, 0x00, 0xc3,86 0x00, 0xce, 0x00, 0xe1, 0x00, 0xf3, 0x01, 0x11);87 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1,88 0x01, 0x2e, 0x01, 0x5c, 0x01, 0x82, 0x01, 0xc3,89 0x01, 0xfe, 0x02, 0x00, 0x02, 0x37, 0x02, 0x77);90 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2,91 0x02, 0xa1, 0x02, 0xd7, 0x02, 0xfe, 0x03, 0x2c,92 0x03, 0x4b, 0x03, 0x63, 0x03, 0x8f, 0x03, 0x90);93 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x03, 0x96, 0x03, 0x98);94 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4,95 0x00, 0x81, 0x00, 0x8b, 0x00, 0x9c, 0x00, 0xa9,96 0x00, 0xb5, 0x00, 0xcb, 0x00, 0xdf, 0x01, 0x02);97 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5,98 0x01, 0x1f, 0x01, 0x51, 0x01, 0x7a, 0x01, 0xbf,99 0x01, 0xfa, 0x01, 0xfc, 0x02, 0x34, 0x02, 0x76);100 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6,101 0x02, 0x9f, 0x02, 0xd7, 0x02, 0xfc, 0x03, 0x2c,102 0x03, 0x4a, 0x03, 0x63, 0x03, 0x8f, 0x03, 0xa2);103 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb7, 0x03, 0xb8, 0x03, 0xba);104 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8,105 0x00, 0x01, 0x00, 0x02, 0x00, 0x0e, 0x00, 0x2a,106 0x00, 0x41, 0x00, 0x67, 0x00, 0x87, 0x00, 0xb9);107 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9,108 0x00, 0xe2, 0x01, 0x22, 0x01, 0x54, 0x01, 0xa3,109 0x01, 0xe6, 0x01, 0xe7, 0x02, 0x24, 0x02, 0x67);110 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba,111 0x02, 0x93, 0x02, 0xcd, 0x02, 0xf6, 0x03, 0x31,112 0x03, 0x6c, 0x03, 0xe9, 0x03, 0xef, 0x03, 0xf4);113 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x03, 0xf6, 0x03, 0xf7);114 115 nt35521_switch_page(&dsi_ctx, 0x03);116 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x22, 0x00);117 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x22, 0x00);118 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2, 0x05, 0x00, 0x60, 0x00, 0x00);119 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x05, 0x00, 0x60, 0x00, 0x00);120 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x05, 0x00, 0x60, 0x00, 0x00);121 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5, 0x05, 0x00, 0x60, 0x00, 0x00);122 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x53, 0x00, 0x60, 0x00, 0x00);123 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x53, 0x00, 0x60, 0x00, 0x00);124 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x53, 0x00, 0x60, 0x00, 0x00);125 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x53, 0x00, 0x60, 0x00, 0x00);126 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x00, 0x34, 0x00, 0x00);127 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc1, 0x00, 0x00, 0x34, 0x00);128 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc2, 0x00, 0x00, 0x34, 0x00);129 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc3, 0x00, 0x00, 0x34, 0x00);130 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc4, 0x60);131 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc5, 0xc0);132 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc6, 0x00);133 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc7, 0x00);134 135 nt35521_switch_page(&dsi_ctx, 0x05);136 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x17, 0x06);137 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x17, 0x06);138 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2, 0x17, 0x06);139 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x17, 0x06);140 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x17, 0x06);141 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5, 0x17, 0x06);142 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6, 0x17, 0x06);143 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb7, 0x17, 0x06);144 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8, 0x00);145 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x00, 0x03);146 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x00, 0x00);147 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x02, 0x03);148 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x02, 0x03);149 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x03, 0x03, 0x00, 0x03, 0x03);150 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x0b);151 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc1, 0x09);152 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc2, 0xa6);153 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc3, 0x05);154 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc4, 0x00);155 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc5, 0x02);156 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc6, 0x22);157 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc7, 0x03);158 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc8, 0x07, 0x20);159 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc9, 0x03, 0x20);160 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xca, 0x01, 0x60);161 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcb, 0x01, 0x60);162 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcc, 0x00, 0x00, 0x02);163 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcd, 0x00, 0x00, 0x02);164 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xce, 0x00, 0x00, 0x02);165 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcf, 0x00, 0x00, 0x02);166 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd1, 0x00, 0x05, 0x01, 0x07, 0x10);167 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd2, 0x10, 0x05, 0x05, 0x03, 0x10);168 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd3, 0x20, 0x00, 0x43, 0x07, 0x10);169 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd4, 0x30, 0x00, 0x43, 0x07, 0x10);170 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd0,171 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);172 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd5,173 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,174 0x00, 0x00, 0x00);175 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6,176 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,177 0x00, 0x00, 0x00);178 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd7,179 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,180 0x00, 0x00, 0x00);181 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00);182 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe5, 0x06);183 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe6, 0x06);184 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe7, 0x00);185 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe8, 0x06);186 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe9, 0x06);187 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xea, 0x06);188 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xeb, 0x00);189 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xec, 0x00);190 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xed, 0x30);191 192 nt35521_switch_page(&dsi_ctx, 0x06);193 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x31, 0x31);194 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x31, 0x31);195 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2, 0x2d, 0x2e);196 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x31, 0x34);197 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x29, 0x2a);198 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5, 0x12, 0x10);199 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6, 0x18, 0x16);200 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb7, 0x00, 0x02);201 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8, 0x08, 0x31);202 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x31, 0x31);203 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x31, 0x31);204 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x31, 0x08);205 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x03, 0x01);206 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x17, 0x19);207 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbe, 0x11, 0x13);208 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbf, 0x2a, 0x29);209 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x34, 0x31);210 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc1, 0x2e, 0x2d);211 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc2, 0x31, 0x31);212 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc3, 0x31, 0x31);213 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc4, 0x31, 0x31);214 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc5, 0x31, 0x31);215 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc6, 0x2e, 0x2d);216 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc7, 0x31, 0x34);217 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc8, 0x29, 0x2a);218 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc9, 0x17, 0x19);219 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xca, 0x11, 0x13);220 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcb, 0x03, 0x01);221 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcc, 0x08, 0x31);222 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcd, 0x31, 0x31);223 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xce, 0x31, 0x31);224 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcf, 0x31, 0x08);225 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd0, 0x00, 0x02);226 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd1, 0x12, 0x10);227 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd2, 0x18, 0x16);228 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd3, 0x2a, 0x29);229 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd4, 0x34, 0x31);230 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd5, 0x2d, 0x2e);231 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x31, 0x31);232 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd7, 0x31, 0x31);233 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe5, 0x31, 0x31);234 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe6, 0x31, 0x31);235 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00);236 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd9, 0x00, 0x00, 0x00, 0x00, 0x00);237 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe7, 0x00);238 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x02);239 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf7, 0x47);240 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x0a);241 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf7, 0x02);242 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x17);243 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf4, 0x60);244 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x01);245 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf9, 0x46);246 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x11);247 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf3, 0x01);248 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x35, 0x00);249 250 nt35521_switch_page(&dsi_ctx, 0x00);251 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd9, 0x02, 0x03, 0x00);252 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf0, 0x55, 0xaa, 0x52, 0x00, 0x00);253 254 nt35521_switch_page(&dsi_ctx, 0x00);255 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x6c, 0x21);256 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf0, 0x55, 0xaa, 0x52, 0x00, 0x00);257 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x35, 0x00);258 259 mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);260 mipi_dsi_msleep(&dsi_ctx, 120);261 mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);262 263 usleep_range(1000, 2000);264 265 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x53, 0x24);266 267 return dsi_ctx.accum_err;268}269 270static int truly_nt35521_off(struct truly_nt35521 *ctx)271{272 struct mipi_dsi_device *dsi = ctx->dsi;273 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };274 275 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;276 277 mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);278 mipi_dsi_msleep(&dsi_ctx, 50);279 mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);280 mipi_dsi_msleep(&dsi_ctx, 150);281 282 return dsi_ctx.accum_err;283}284 285static int truly_nt35521_prepare(struct drm_panel *panel)286{287 struct truly_nt35521 *ctx = to_truly_nt35521(panel);288 struct device *dev = &ctx->dsi->dev;289 int ret;290 291 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);292 if (ret < 0) {293 dev_err(dev, "Failed to enable regulators: %d\n", ret);294 return ret;295 }296 297 truly_nt35521_reset(ctx);298 299 ret = truly_nt35521_on(ctx);300 if (ret < 0) {301 dev_err(dev, "Failed to initialize panel: %d\n", ret);302 gpiod_set_value_cansleep(ctx->reset_gpio, 1);303 return ret;304 }305 306 return 0;307}308 309static int truly_nt35521_unprepare(struct drm_panel *panel)310{311 struct truly_nt35521 *ctx = to_truly_nt35521(panel);312 struct device *dev = &ctx->dsi->dev;313 int ret;314 315 ret = truly_nt35521_off(ctx);316 if (ret < 0)317 dev_err(dev, "Failed to un-initialize panel: %d\n", ret);318 319 gpiod_set_value_cansleep(ctx->reset_gpio, 1);320 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),321 ctx->supplies);322 323 return 0;324}325 326static int truly_nt35521_enable(struct drm_panel *panel)327{328 struct truly_nt35521 *ctx = to_truly_nt35521(panel);329 330 gpiod_set_value_cansleep(ctx->blen_gpio, 1);331 332 return 0;333}334 335static int truly_nt35521_disable(struct drm_panel *panel)336{337 struct truly_nt35521 *ctx = to_truly_nt35521(panel);338 339 gpiod_set_value_cansleep(ctx->blen_gpio, 0);340 341 return 0;342}343 344static const struct drm_display_mode truly_nt35521_mode = {345 .clock = (720 + 232 + 20 + 112) * (1280 + 18 + 1 + 18) * 60 / 1000,346 .hdisplay = 720,347 .hsync_start = 720 + 232,348 .hsync_end = 720 + 232 + 20,349 .htotal = 720 + 232 + 20 + 112,350 .vdisplay = 1280,351 .vsync_start = 1280 + 18,352 .vsync_end = 1280 + 18 + 1,353 .vtotal = 1280 + 18 + 1 + 18,354 .width_mm = 65,355 .height_mm = 116,356};357 358static int truly_nt35521_get_modes(struct drm_panel *panel,359 struct drm_connector *connector)360{361 struct drm_display_mode *mode;362 363 mode = drm_mode_duplicate(connector->dev, &truly_nt35521_mode);364 if (!mode)365 return -ENOMEM;366 367 drm_mode_set_name(mode);368 369 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;370 connector->display_info.width_mm = mode->width_mm;371 connector->display_info.height_mm = mode->height_mm;372 drm_mode_probed_add(connector, mode);373 374 return 1;375}376 377static const struct drm_panel_funcs truly_nt35521_panel_funcs = {378 .prepare = truly_nt35521_prepare,379 .unprepare = truly_nt35521_unprepare,380 .enable = truly_nt35521_enable,381 .disable = truly_nt35521_disable,382 .get_modes = truly_nt35521_get_modes,383};384 385static int truly_nt35521_bl_update_status(struct backlight_device *bl)386{387 struct mipi_dsi_device *dsi = bl_get_data(bl);388 u16 brightness = backlight_get_brightness(bl);389 int ret;390 391 ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);392 if (ret < 0)393 return ret;394 395 return 0;396}397 398static int truly_nt35521_bl_get_brightness(struct backlight_device *bl)399{400 struct mipi_dsi_device *dsi = bl_get_data(bl);401 u16 brightness;402 int ret;403 404 ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);405 if (ret < 0)406 return ret;407 408 return brightness & 0xff;409}410 411static const struct backlight_ops truly_nt35521_bl_ops = {412 .update_status = truly_nt35521_bl_update_status,413 .get_brightness = truly_nt35521_bl_get_brightness,414};415 416static struct backlight_device *417truly_nt35521_create_backlight(struct mipi_dsi_device *dsi)418{419 struct device *dev = &dsi->dev;420 const struct backlight_properties props = {421 .type = BACKLIGHT_RAW,422 .brightness = 255,423 .max_brightness = 255,424 };425 426 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,427 &truly_nt35521_bl_ops, &props);428}429 430static int truly_nt35521_probe(struct mipi_dsi_device *dsi)431{432 struct device *dev = &dsi->dev;433 struct truly_nt35521 *ctx;434 int ret;435 436 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);437 if (!ctx)438 return -ENOMEM;439 440 ctx->supplies[0].supply = "positive5";441 ctx->supplies[1].supply = "negative5";442 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),443 ctx->supplies);444 if (ret < 0) {445 dev_err(dev, "Failed to get regulators: %d\n", ret);446 return ret;447 }448 449 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);450 if (IS_ERR(ctx->reset_gpio))451 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),452 "Failed to get reset-gpios\n");453 454 ctx->blen_gpio = devm_gpiod_get(dev, "backlight", GPIOD_OUT_LOW);455 if (IS_ERR(ctx->blen_gpio))456 return dev_err_probe(dev, PTR_ERR(ctx->blen_gpio),457 "Failed to get backlight-gpios\n");458 459 ctx->dsi = dsi;460 mipi_dsi_set_drvdata(dsi, ctx);461 462 dsi->lanes = 4;463 dsi->format = MIPI_DSI_FMT_RGB888;464 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |465 MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_NO_EOT_PACKET |466 MIPI_DSI_CLOCK_NON_CONTINUOUS;467 468 drm_panel_init(&ctx->panel, dev, &truly_nt35521_panel_funcs,469 DRM_MODE_CONNECTOR_DSI);470 471 ctx->panel.backlight = truly_nt35521_create_backlight(dsi);472 if (IS_ERR(ctx->panel.backlight))473 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),474 "Failed to create backlight\n");475 476 drm_panel_add(&ctx->panel);477 478 ret = mipi_dsi_attach(dsi);479 if (ret < 0) {480 dev_err(dev, "Failed to attach to DSI host: %d\n", ret);481 drm_panel_remove(&ctx->panel);482 return ret;483 }484 485 return 0;486}487 488static void truly_nt35521_remove(struct mipi_dsi_device *dsi)489{490 struct truly_nt35521 *ctx = mipi_dsi_get_drvdata(dsi);491 int ret;492 493 ret = mipi_dsi_detach(dsi);494 if (ret < 0)495 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);496 497 drm_panel_remove(&ctx->panel);498}499 500static const struct of_device_id truly_nt35521_of_match[] = {501 { .compatible = "sony,tulip-truly-nt35521" },502 { /* sentinel */ }503};504MODULE_DEVICE_TABLE(of, truly_nt35521_of_match);505 506static struct mipi_dsi_driver truly_nt35521_driver = {507 .probe = truly_nt35521_probe,508 .remove = truly_nt35521_remove,509 .driver = {510 .name = "panel-truly-nt35521",511 .of_match_table = truly_nt35521_of_match,512 },513};514module_mipi_dsi_driver(truly_nt35521_driver);515 516MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");517MODULE_DESCRIPTION("DRM driver for Sony Tulip Truly NT35521 panel");518MODULE_LICENSE("GPL v2");519