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         backlight_disable(sharp_nt->backlight);
 121
 122         sharp_nt->enabled = false;
 123
 124         return 0;
 125 }
 126
 127 static int sharp_nt_panel_unprepare(struct drm_panel *panel)
 128 {
 129         struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 130         int ret;
 131
 132         if (!sharp_nt->prepared)
 133                 return 0;
 134
 135         ret = sharp_nt_panel_off(sharp_nt);
 136         if (ret < 0) {
 137                 dev_err(panel->dev, "failed to set panel off: %d\n", ret);
 138                 return ret;
 139         }
 140
 141         regulator_disable(sharp_nt->supply);
 142         if (sharp_nt->reset_gpio)
 143                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 144
 145         sharp_nt->prepared = false;
 146
 147         return 0;
 148 }
 149
 150 static int sharp_nt_panel_prepare(struct drm_panel *panel)
 151 {
 152         struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 153         int ret;
 154
 155         if (sharp_nt->prepared)
 156                 return 0;
 157
 158         ret = regulator_enable(sharp_nt->supply);
 159         if (ret < 0)
 160                 return ret;
 161
 162         msleep(20);
 163
 164         if (sharp_nt->reset_gpio) {
 165                 gpiod_set_value(sharp_nt->reset_gpio, 1);
 166                 msleep(1);
 167                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 168                 msleep(1);
 169                 gpiod_set_value(sharp_nt->reset_gpio, 1);
 170                 msleep(10);
 171         }
 172
 173         ret = sharp_nt_panel_init(sharp_nt);
 174         if (ret < 0) {
 175                 dev_err(panel->dev, "failed to init panel: %d\n", ret);
 176                 goto poweroff;
 177         }
 178
 179         ret = sharp_nt_panel_on(sharp_nt);
 180         if (ret < 0) {
 181                 dev_err(panel->dev, "failed to set panel on: %d\n", ret);
 182                 goto poweroff;
 183         }
 184
 185         sharp_nt->prepared = true;
 186
 187         return 0;
 188
 189 poweroff:
 190         regulator_disable(sharp_nt->supply);
 191         if (sharp_nt->reset_gpio)
 192                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 193         return ret;
 194 }
 195
 196 static int sharp_nt_panel_enable(struct drm_panel *panel)
 197 {
 198         struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 199
 200         if (sharp_nt->enabled)
 201                 return 0;
 202
 203         backlight_enable(sharp_nt->backlight);
 204
 205         sharp_nt->enabled = true;
 206
 207         return 0;
 208 }
 209
 210 static const struct drm_display_mode default_mode = {
 211         .clock = 41118,
 212         .hdisplay = 540,
 213         .hsync_start = 540 + 48,
 214         .hsync_end = 540 + 48 + 80,
 215         .htotal = 540 + 48 + 80 + 32,
 216         .vdisplay = 960,
 217         .vsync_start = 960 + 3,
 218         .vsync_end = 960 + 3 + 15,
 219         .vtotal = 960 + 3 + 15 + 1,
 220         .vrefresh = 60,
 221 };
 222
 223 static int sharp_nt_panel_get_modes(struct drm_panel *panel)
 224 {
 225         struct drm_display_mode *mode;
 226
 227         mode = drm_mode_duplicate(panel->drm, &default_mode);
 228         if (!mode) {
 229                 dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
 230                                 default_mode.hdisplay, default_mode.vdisplay,
 231                                 default_mode.vrefresh);
 232                 return -ENOMEM;
 233         }
 234
 235         drm_mode_set_name(mode);
 236
 237         drm_mode_probed_add(panel->connector, mode);
 238
 239         panel->connector->display_info.width_mm = 54;
 240         panel->connector->display_info.height_mm = 95;
 241
 242         return 1;
 243 }
 244
 245 static const struct drm_panel_funcs sharp_nt_panel_funcs = {
 246         .disable = sharp_nt_panel_disable,
 247         .unprepare = sharp_nt_panel_unprepare,
 248         .prepare = sharp_nt_panel_prepare,
 249         .enable = sharp_nt_panel_enable,
 250         .get_modes = sharp_nt_panel_get_modes,
 251 };
 252
 253 static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
 254 {
 255         struct device *dev = &sharp_nt->dsi->dev;
 256
 257         sharp_nt->mode = &default_mode;
 258
 259         sharp_nt->supply = devm_regulator_get(dev, "avdd");
 260         if (IS_ERR(sharp_nt->supply))
 261                 return PTR_ERR(sharp_nt->supply);
 262
 263         sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
 264         if (IS_ERR(sharp_nt->reset_gpio)) {
 265                 dev_err(dev, "cannot get reset-gpios %ld\n",
 266                         PTR_ERR(sharp_nt->reset_gpio));
 267                 sharp_nt->reset_gpio = NULL;
 268         } else {
 269                 gpiod_set_value(sharp_nt->reset_gpio, 0);
 270         }
 271
 272         sharp_nt->backlight = devm_of_find_backlight(dev);
 273
 274         if (IS_ERR(sharp_nt->backlight))
 275                 return PTR_ERR(sharp_nt->backlight);
 276
 277         drm_panel_init(&sharp_nt->base);
 278         sharp_nt->base.funcs = &sharp_nt_panel_funcs;
 279         sharp_nt->base.dev = &sharp_nt->dsi->dev;
 280
 281         return drm_panel_add(&sharp_nt->base);
 282 }
 283
 284 static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
 285 {
 286         if (sharp_nt->base.dev)
 287                 drm_panel_remove(&sharp_nt->base);
 288 }
 289
 290 static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
 291 {
 292         struct sharp_nt_panel *sharp_nt;
 293         int ret;
 294
 295         dsi->lanes = 2;
 296         dsi->format = MIPI_DSI_FMT_RGB888;
 297         dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
 298                         MIPI_DSI_MODE_VIDEO_HSE |
 299                         MIPI_DSI_CLOCK_NON_CONTINUOUS |
 300                         MIPI_DSI_MODE_EOT_PACKET;
 301
 302         sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
 303         if (!sharp_nt)
 304                 return -ENOMEM;
 305
 306         mipi_dsi_set_drvdata(dsi, sharp_nt);
 307
 308         sharp_nt->dsi = dsi;
 309
 310         ret = sharp_nt_panel_add(sharp_nt);
 311         if (ret < 0)
 312                 return ret;
 313
 314         return mipi_dsi_attach(dsi);
 315 }
 316
 317 static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
 318 {
 319         struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
 320         int ret;
 321
 322         ret = sharp_nt_panel_disable(&sharp_nt->base);
 323         if (ret < 0)
 324                 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
 325
 326         ret = mipi_dsi_detach(dsi);
 327         if (ret < 0)
 328                 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
 329
 330         sharp_nt_panel_del(sharp_nt);
 331
 332         return 0;
 333 }
 334
 335 static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi)
 336 {
 337         struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
 338
 339         sharp_nt_panel_disable(&sharp_nt->base);
 340 }
 341
 342 static const struct of_device_id sharp_nt_of_match[] = {
 343         { .compatible = "sharp,ls043t1le01-qhd", },
 344         { }
 345 };
 346 MODULE_DEVICE_TABLE(of, sharp_nt_of_match);
 347
 348 static struct mipi_dsi_driver sharp_nt_panel_driver = {
 349         .driver = {
 350                 .name = "panel-sharp-ls043t1le01-qhd",
 351                 .of_match_table = sharp_nt_of_match,
 352         },
 353         .probe = sharp_nt_panel_probe,
 354         .remove = sharp_nt_panel_remove,
 355         .shutdown = sharp_nt_panel_shutdown,
 356 };
 357 module_mipi_dsi_driver(sharp_nt_panel_driver);
 358
 359 MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
 360 MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
 361 MODULE_LICENSE("GPL v2");