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

   1 /*
   2  * Copyright (C) 2015 Red Hat
   3  * Copyright (C) 2015 Sony Mobile Communications Inc.
   4  * Author: Werner Johansson <werner.johansson@sonymobile.com>
   5  *
   6  * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License version 2 as published by
  10  * the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <linux/backlight.h>
  22 #include <linux/gpio/consumer.h>
  23 #include <linux/module.h>
  24 #include <linux/of.h>
  25 #include <linux/regulator/consumer.h>
  26
  27 #include <drm/drmP.h>
  28 #include <drm/drm_crtc.h>
  29 #include <drm/drm_mipi_dsi.h>
  30 #include <drm/drm_panel.h>
  31
  32 #include <video/mipi_display.h>
  33
  34 struct sharp_nt_panel {
  35         struct drm_panel base;
  36         struct mipi_dsi_device *dsi;
  37
  38         struct backlight_device *backlight;
  39         struct regulator *supply;
  40         struct gpio_desc *reset_gpio;
  41
  42         bool prepared;
  43         bool enabled;
  44
  45         const struct drm_display_mode *mode;
  46 };
  47
  48 static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)
  49 {
  50         return container_of(panel, struct sharp_nt_panel, base);
  51 }
  52
  53 static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)
  54 {
  55         struct mipi_dsi_device *dsi = sharp_nt->dsi;
  56         int ret;
  57
  58         dsi->mode_flags |= MIPI_DSI_MODE_LPM;
  59
  60         ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
  61         if (ret < 0)
  62                 return ret;
  63
  64         msleep(120);
  65
  66         /* Novatek two-lane operation */
  67         ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
  68         if (ret < 0)
  69                 return ret;
  70
  71         /* Set both MCU and RGB I/F to 24bpp */
  72         ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
  73                                         (MIPI_DCS_PIXEL_FMT_24BIT << 4));
  74         if (ret < 0)
  75                 return ret;
  76
  77         return 0;
  78 }
  79
  80 static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)
  81 {
  82         struct mipi_dsi_device *dsi = sharp_nt->dsi;
  83         int ret;
  84
  85         dsi->mode_flags |= MIPI_DSI_MODE_LPM;
  86
  87         ret = mipi_dsi_dcs_set_display_on(dsi);
  88         if (ret < 0)
  89                 return ret;
  90
  91         return 0;
  92 }
  93
  94 static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)
  95 {
  96         struct mipi_dsi_device *dsi = sharp_nt->dsi;
  97         int ret;
  98
  99         dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 100
 101         ret = mipi_dsi_dcs_set_display_off(dsi);
 102         if (ret < 0)
 103                 return ret;
 104
 105         ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
 106         if (ret < 0)
 107                 return ret;
 108
 109         return 0;
 110 }
 111
 112
 113 static int sharp_nt_panel_disable(struct drm_panel *panel)
 114 {
 115         struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 116
 117         if (!sharp_nt->enabled)
 118                 return 0;
 119
 120         if (sharp_nt->backlight) {
 121                 sharp_nt->backlight->props.power = FB_BLANK_POWERDOWN;
 122                 backlight_update_status(sharp_nt->backlight);
 123         }
 124
 125         sharp_nt->enabled = false;
 126
 127         return 0;
 128 }
 129
 130 static int sharp_nt_panel_unprepare(struct drm_panel *panel)
 131 {
 132         struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 133         int ret;
 134
 135         if (!sharp_nt->prepared)
 136                 return 0;
 137
 138         ret = sharp_nt_panel_off(sharp_nt);
 139         if (ret < 0) {
 140                 dev_err(panel->dev, "failed to set panel off: %d\n", ret);
 141                 return ret;
 142         }
 143
 144         regulator_disable(sharp_nt->supply);
 145         if (sharp_nt->reset_gpio)
 146                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 147
 148         sharp_nt->prepared = false;
 149
 150         return 0;
 151 }
 152
 153 static int sharp_nt_panel_prepare(struct drm_panel *panel)
 154 {
 155         struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 156         int ret;
 157
 158         if (sharp_nt->prepared)
 159                 return 0;
 160
 161         ret = regulator_enable(sharp_nt->supply);
 162         if (ret < 0)
 163                 return ret;
 164
 165         msleep(20);
 166
 167         if (sharp_nt->reset_gpio) {
 168                 gpiod_set_value(sharp_nt->reset_gpio, 1);
 169                 msleep(1);
 170                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 171                 msleep(1);
 172                 gpiod_set_value(sharp_nt->reset_gpio, 1);
 173                 msleep(10);
 174         }
 175
 176         ret = sharp_nt_panel_init(sharp_nt);
 177         if (ret < 0) {
 178                 dev_err(panel->dev, "failed to init panel: %d\n", ret);
 179                 goto poweroff;
 180         }
 181
 182         ret = sharp_nt_panel_on(sharp_nt);
 183         if (ret < 0) {
 184                 dev_err(panel->dev, "failed to set panel on: %d\n", ret);
 185                 goto poweroff;
 186         }
 187
 188         sharp_nt->prepared = true;
 189
 190         return 0;
 191
 192 poweroff:
 193         regulator_disable(sharp_nt->supply);
 194         if (sharp_nt->reset_gpio)
 195                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 196         return ret;
 197 }
 198
 199 static int sharp_nt_panel_enable(struct drm_panel *panel)
 200 {
 201         struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 202
 203         if (sharp_nt->enabled)
 204                 return 0;
 205
 206         if (sharp_nt->backlight) {
 207                 sharp_nt->backlight->props.power = FB_BLANK_UNBLANK;
 208                 backlight_update_status(sharp_nt->backlight);
 209         }
 210
 211         sharp_nt->enabled = true;
 212
 213         return 0;
 214 }
 215
 216 static const struct drm_display_mode default_mode = {
 217         .clock = 41118,
 218         .hdisplay = 540,
 219         .hsync_start = 540 + 48,
 220         .hsync_end = 540 + 48 + 80,
 221         .htotal = 540 + 48 + 80 + 32,
 222         .vdisplay = 960,
 223         .vsync_start = 960 + 3,
 224         .vsync_end = 960 + 3 + 15,
 225         .vtotal = 960 + 3 + 15 + 1,
 226         .vrefresh = 60,
 227 };
 228
 229 static int sharp_nt_panel_get_modes(struct drm_panel *panel)
 230 {
 231         struct drm_display_mode *mode;
 232
 233         mode = drm_mode_duplicate(panel->drm, &default_mode);
 234         if (!mode) {
 235                 dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
 236                                 default_mode.hdisplay, default_mode.vdisplay,
 237                                 default_mode.vrefresh);
 238                 return -ENOMEM;
 239         }
 240
 241         drm_mode_set_name(mode);
 242
 243         drm_mode_probed_add(panel->connector, mode);
 244
 245         panel->connector->display_info.width_mm = 54;
 246         panel->connector->display_info.height_mm = 95;
 247
 248         return 1;
 249 }
 250
 251 static const struct drm_panel_funcs sharp_nt_panel_funcs = {
 252         .disable = sharp_nt_panel_disable,
 253         .unprepare = sharp_nt_panel_unprepare,
 254         .prepare = sharp_nt_panel_prepare,
 255         .enable = sharp_nt_panel_enable,
 256         .get_modes = sharp_nt_panel_get_modes,
 257 };
 258
 259 static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
 260 {
 261         struct device *dev = &sharp_nt->dsi->dev;
 262         struct device_node *np;
 263         int ret;
 264
 265         sharp_nt->mode = &default_mode;
 266
 267         sharp_nt->supply = devm_regulator_get(dev, "avdd");
 268         if (IS_ERR(sharp_nt->supply))
 269                 return PTR_ERR(sharp_nt->supply);
 270
 271         sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
 272         if (IS_ERR(sharp_nt->reset_gpio)) {
 273                 dev_err(dev, "cannot get reset-gpios %ld\n",
 274                         PTR_ERR(sharp_nt->reset_gpio));
 275                 sharp_nt->reset_gpio = NULL;
 276         } else {
 277                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 278         }
 279
 280         np = of_parse_phandle(dev->of_node, "backlight", 0);
 281         if (np) {
 282                 sharp_nt->backlight = of_find_backlight_by_node(np);
 283                 of_node_put(np);
 284
 285                 if (!sharp_nt->backlight)
 286                         return -EPROBE_DEFER;
 287         }
 288
 289         drm_panel_init(&sharp_nt->base);
 290         sharp_nt->base.funcs = &sharp_nt_panel_funcs;
 291         sharp_nt->base.dev = &sharp_nt->dsi->dev;
 292
 293         ret = drm_panel_add(&sharp_nt->base);
 294         if (ret < 0)
 295                 goto put_backlight;
 296
 297         return 0;
 298
 299 put_backlight:
 300         if (sharp_nt->backlight)
 301                 put_device(&sharp_nt->backlight->dev);
 302
 303         return ret;
 304 }
 305
 306 static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
 307 {
 308         if (sharp_nt->base.dev)
 309                 drm_panel_remove(&sharp_nt->base);
 310
 311         if (sharp_nt->backlight)
 312                 put_device(&sharp_nt->backlight->dev);
 313 }
 314
 315 static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
 316 {
 317         struct sharp_nt_panel *sharp_nt;
 318         int ret;
 319
 320         dsi->lanes = 2;
 321         dsi->format = MIPI_DSI_FMT_RGB888;
 322         dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
 323                         MIPI_DSI_MODE_VIDEO_HSE |
 324                         MIPI_DSI_CLOCK_NON_CONTINUOUS |
 325                         MIPI_DSI_MODE_EOT_PACKET;
 326
 327         sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
 328         if (!sharp_nt)
 329                 return -ENOMEM;
 330
 331         mipi_dsi_set_drvdata(dsi, sharp_nt);
 332
 333         sharp_nt->dsi = dsi;
 334
 335         ret = sharp_nt_panel_add(sharp_nt);
 336         if (ret < 0)
 337                 return ret;
 338
 339         return mipi_dsi_attach(dsi);
 340 }
 341
 342 static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
 343 {
 344         struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
 345         int ret;
 346
 347         ret = sharp_nt_panel_disable(&sharp_nt->base);
 348         if (ret < 0)
 349                 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
 350
 351         ret = mipi_dsi_detach(dsi);
 352         if (ret < 0)
 353                 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
 354
 355         drm_panel_detach(&sharp_nt->base);
 356         sharp_nt_panel_del(sharp_nt);
 357
 358         return 0;
 359 }
 360
 361 static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi)
 362 {
 363         struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
 364
 365         sharp_nt_panel_disable(&sharp_nt->base);
 366 }
 367
 368 static const struct of_device_id sharp_nt_of_match[] = {
 369         { .compatible = "sharp,ls043t1le01-qhd", },
 370         { }
 371 };
 372 MODULE_DEVICE_TABLE(of, sharp_nt_of_match);
 373
 374 static struct mipi_dsi_driver sharp_nt_panel_driver = {
 375         .driver = {
 376                 .name = "panel-sharp-ls043t1le01-qhd",
 377                 .of_match_table = sharp_nt_of_match,
 378         },
 379         .probe = sharp_nt_panel_probe,
 380         .remove = sharp_nt_panel_remove,
 381         .shutdown = sharp_nt_panel_shutdown,
 382 };
 383 module_mipi_dsi_driver(sharp_nt_panel_driver);
 384
 385 MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
 386 MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
 387 MODULE_LICENSE("GPL v2");