drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2015 Red Hat
   4  * Copyright (C) 2015 Sony Mobile Communications Inc.
   5  * Author: Werner Johansson <werner.johansson@sonymobile.com>
   6  *
   7  * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>
   8  */
   9
  10 #include <linux/backlight.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/drmP.h>
  17 #include <drm/drm_crtc.h>
  18 #include <drm/drm_mipi_dsi.h>
  19 #include <drm/drm_panel.h>
  20
  21 #include <video/mipi_display.h>
  22
  23 struct sharp_nt_panel {
  24         struct drm_panel base;
  25         struct mipi_dsi_device *dsi;
  26
  27         struct backlight_device *backlight;
  28         struct regulator *supply;
  29         struct gpio_desc *reset_gpio;
  30
  31         bool prepared;
  32         bool enabled;
  33
  34         const struct drm_display_mode *mode;
  35 };
  36
  37 static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)
  38 {
  39         return container_of(panel, struct sharp_nt_panel, base);
  40 }
  41
  42 static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)
  43 {
  44         struct mipi_dsi_device *dsi = sharp_nt->dsi;
  45         int ret;
  46
  47         dsi->mode_flags |= MIPI_DSI_MODE_LPM;
  48
  49         ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
  50         if (ret < 0)
  51                 return ret;
  52
  53         msleep(120);
  54
  55         /* Novatek two-lane operation */
  56         ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
  57         if (ret < 0)
  58                 return ret;
  59
  60         /* Set both MCU and RGB I/F to 24bpp */
  61         ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
  62                                         (MIPI_DCS_PIXEL_FMT_24BIT << 4));
  63         if (ret < 0)
  64                 return ret;
  65
  66         return 0;
  67 }
  68
  69 static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)
  70 {
  71         struct mipi_dsi_device *dsi = sharp_nt->dsi;
  72         int ret;
  73
  74         dsi->mode_flags |= MIPI_DSI_MODE_LPM;
  75
  76         ret = mipi_dsi_dcs_set_display_on(dsi);
  77         if (ret < 0)
  78                 return ret;
  79
  80         return 0;
  81 }
  82
  83 static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)
  84 {
  85         struct mipi_dsi_device *dsi = sharp_nt->dsi;
  86         int ret;
  87
  88         dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
  89
  90         ret = mipi_dsi_dcs_set_display_off(dsi);
  91         if (ret < 0)
  92                 return ret;
  93
  94         ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
  95         if (ret < 0)
  96                 return ret;
  97
  98         return 0;
  99 }
 100
 101
 102 static int sharp_nt_panel_disable(struct drm_panel *panel)
 103 {
 104         struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 105
 106         if (!sharp_nt->enabled)
 107                 return 0;
 108
 109         backlight_disable(sharp_nt->backlight);
 110
 111         sharp_nt->enabled = false;
 112
 113         return 0;
 114 }
 115
 116 static int sharp_nt_panel_unprepare(struct drm_panel *panel)
 117 {
 118         struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 119         int ret;
 120
 121         if (!sharp_nt->prepared)
 122                 return 0;
 123
 124         ret = sharp_nt_panel_off(sharp_nt);
 125         if (ret < 0) {
 126                 dev_err(panel->dev, "failed to set panel off: %d\n", ret);
 127                 return ret;
 128         }
 129
 130         regulator_disable(sharp_nt->supply);
 131         if (sharp_nt->reset_gpio)
 132                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 133
 134         sharp_nt->prepared = false;
 135
 136         return 0;
 137 }
 138
 139 static int sharp_nt_panel_prepare(struct drm_panel *panel)
 140 {
 141         struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 142         int ret;
 143
 144         if (sharp_nt->prepared)
 145                 return 0;
 146
 147         ret = regulator_enable(sharp_nt->supply);
 148         if (ret < 0)
 149                 return ret;
 150
 151         msleep(20);
 152
 153         if (sharp_nt->reset_gpio) {
 154                 gpiod_set_value(sharp_nt->reset_gpio, 1);
 155                 msleep(1);
 156                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 157                 msleep(1);
 158                 gpiod_set_value(sharp_nt->reset_gpio, 1);
 159                 msleep(10);
 160         }
 161
 162         ret = sharp_nt_panel_init(sharp_nt);
 163         if (ret < 0) {
 164                 dev_err(panel->dev, "failed to init panel: %d\n", ret);
 165                 goto poweroff;
 166         }
 167
 168         ret = sharp_nt_panel_on(sharp_nt);
 169         if (ret < 0) {
 170                 dev_err(panel->dev, "failed to set panel on: %d\n", ret);
 171                 goto poweroff;
 172         }
 173
 174         sharp_nt->prepared = true;
 175
 176         return 0;
 177
 178 poweroff:
 179         regulator_disable(sharp_nt->supply);
 180         if (sharp_nt->reset_gpio)
 181                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 182         return ret;
 183 }
 184
 185 static int sharp_nt_panel_enable(struct drm_panel *panel)
 186 {
 187         struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 188
 189         if (sharp_nt->enabled)
 190                 return 0;
 191
 192         backlight_enable(sharp_nt->backlight);
 193
 194         sharp_nt->enabled = true;
 195
 196         return 0;
 197 }
 198
 199 static const struct drm_display_mode default_mode = {
 200         .clock = 41118,
 201         .hdisplay = 540,
 202         .hsync_start = 540 + 48,
 203         .hsync_end = 540 + 48 + 80,
 204         .htotal = 540 + 48 + 80 + 32,
 205         .vdisplay = 960,
 206         .vsync_start = 960 + 3,
 207         .vsync_end = 960 + 3 + 15,
 208         .vtotal = 960 + 3 + 15 + 1,
 209         .vrefresh = 60,
 210 };
 211
 212 static int sharp_nt_panel_get_modes(struct drm_panel *panel)
 213 {
 214         struct drm_display_mode *mode;
 215
 216         mode = drm_mode_duplicate(panel->drm, &default_mode);
 217         if (!mode) {
 218                 dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
 219                                 default_mode.hdisplay, default_mode.vdisplay,
 220                                 default_mode.vrefresh);
 221                 return -ENOMEM;
 222         }
 223
 224         drm_mode_set_name(mode);
 225
 226         drm_mode_probed_add(panel->connector, mode);
 227
 228         panel->connector->display_info.width_mm = 54;
 229         panel->connector->display_info.height_mm = 95;
 230
 231         return 1;
 232 }
 233
 234 static const struct drm_panel_funcs sharp_nt_panel_funcs = {
 235         .disable = sharp_nt_panel_disable,
 236         .unprepare = sharp_nt_panel_unprepare,
 237         .prepare = sharp_nt_panel_prepare,
 238         .enable = sharp_nt_panel_enable,
 239         .get_modes = sharp_nt_panel_get_modes,
 240 };
 241
 242 static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
 243 {
 244         struct device *dev = &sharp_nt->dsi->dev;
 245
 246         sharp_nt->mode = &default_mode;
 247
 248         sharp_nt->supply = devm_regulator_get(dev, "avdd");
 249         if (IS_ERR(sharp_nt->supply))
 250                 return PTR_ERR(sharp_nt->supply);
 251
 252         sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
 253         if (IS_ERR(sharp_nt->reset_gpio)) {
 254                 dev_err(dev, "cannot get reset-gpios %ld\n",
 255                         PTR_ERR(sharp_nt->reset_gpio));
 256                 sharp_nt->reset_gpio = NULL;
 257         } else {
 258                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 259         }
 260
 261         sharp_nt->backlight = devm_of_find_backlight(dev);
 262
 263         if (IS_ERR(sharp_nt->backlight))
 264                 return PTR_ERR(sharp_nt->backlight);
 265
 266         drm_panel_init(&sharp_nt->base);
 267         sharp_nt->base.funcs = &sharp_nt_panel_funcs;
 268         sharp_nt->base.dev = &sharp_nt->dsi->dev;
 269
 270         return drm_panel_add(&sharp_nt->base);
 271 }
 272
 273 static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
 274 {
 275         if (sharp_nt->base.dev)
 276                 drm_panel_remove(&sharp_nt->base);
 277 }
 278
 279 static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
 280 {
 281         struct sharp_nt_panel *sharp_nt;
 282         int ret;
 283
 284         dsi->lanes = 2;
 285         dsi->format = MIPI_DSI_FMT_RGB888;
 286         dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
 287                         MIPI_DSI_MODE_VIDEO_HSE |
 288                         MIPI_DSI_CLOCK_NON_CONTINUOUS |
 289                         MIPI_DSI_MODE_EOT_PACKET;
 290
 291         sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
 292         if (!sharp_nt)
 293                 return -ENOMEM;
 294
 295         mipi_dsi_set_drvdata(dsi, sharp_nt);
 296
 297         sharp_nt->dsi = dsi;
 298
 299         ret = sharp_nt_panel_add(sharp_nt);
 300         if (ret < 0)
 301                 return ret;
 302
 303         return mipi_dsi_attach(dsi);
 304 }
 305
 306 static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
 307 {
 308         struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
 309         int ret;
 310
 311         ret = sharp_nt_panel_disable(&sharp_nt->base);
 312         if (ret < 0)
 313                 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
 314
 315         ret = mipi_dsi_detach(dsi);
 316         if (ret < 0)
 317                 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
 318
 319         sharp_nt_panel_del(sharp_nt);
 320
 321         return 0;
 322 }
 323
 324 static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi)
 325 {
 326         struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
 327
 328         sharp_nt_panel_disable(&sharp_nt->base);
 329 }
 330
 331 static const struct of_device_id sharp_nt_of_match[] = {
 332         { .compatible = "sharp,ls043t1le01-qhd", },
 333         { }
 334 };
 335 MODULE_DEVICE_TABLE(of, sharp_nt_of_match);
 336
 337 static struct mipi_dsi_driver sharp_nt_panel_driver = {
 338         .driver = {
 339                 .name = "panel-sharp-ls043t1le01-qhd",
 340                 .of_match_table = sharp_nt_of_match,
 341         },
 342         .probe = sharp_nt_panel_probe,
 343         .remove = sharp_nt_panel_remove,
 344         .shutdown = sharp_nt_panel_shutdown,
 345 };
 346 module_mipi_dsi_driver(sharp_nt_panel_driver);
 347
 348 MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
 349 MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
 350 MODULE_LICENSE("GPL v2");