drivers/gpu/drm/panel/panel-innolux-p079zca.c

   1 /*
   2  * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   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 innolux_panel {
  24         struct drm_panel base;
  25         struct mipi_dsi_device *link;
  26
  27         struct backlight_device *backlight;
  28         struct regulator *supply;
  29         struct gpio_desc *enable_gpio;
  30
  31         bool prepared;
  32         bool enabled;
  33 };
  34
  35 static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel)
  36 {
  37         return container_of(panel, struct innolux_panel, base);
  38 }
  39
  40 static int innolux_panel_disable(struct drm_panel *panel)
  41 {
  42         struct innolux_panel *innolux = to_innolux_panel(panel);
  43         int err;
  44
  45         if (!innolux->enabled)
  46                 return 0;
  47
  48         innolux->backlight->props.power = FB_BLANK_POWERDOWN;
  49         backlight_update_status(innolux->backlight);
  50
  51         err = mipi_dsi_dcs_set_display_off(innolux->link);
  52         if (err < 0)
  53                 DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
  54                               err);
  55
  56         innolux->enabled = false;
  57
  58         return 0;
  59 }
  60
  61 static int innolux_panel_unprepare(struct drm_panel *panel)
  62 {
  63         struct innolux_panel *innolux = to_innolux_panel(panel);
  64         int err;
  65
  66         if (!innolux->prepared)
  67                 return 0;
  68
  69         err = mipi_dsi_dcs_enter_sleep_mode(innolux->link);
  70         if (err < 0) {
  71                 DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n",
  72                               err);
  73                 return err;
  74         }
  75
  76         gpiod_set_value_cansleep(innolux->enable_gpio, 0);
  77
  78         /* T8: 80ms - 1000ms */
  79         msleep(80);
  80
  81         err = regulator_disable(innolux->supply);
  82         if (err < 0)
  83                 return err;
  84
  85         innolux->prepared = false;
  86
  87         return 0;
  88 }
  89
  90 static int innolux_panel_prepare(struct drm_panel *panel)
  91 {
  92         struct innolux_panel *innolux = to_innolux_panel(panel);
  93         int err, regulator_err;
  94
  95         if (innolux->prepared)
  96                 return 0;
  97
  98         gpiod_set_value_cansleep(innolux->enable_gpio, 0);
  99
 100         err = regulator_enable(innolux->supply);
 101         if (err < 0)
 102                 return err;
 103
 104         /* T2: 15ms - 1000ms */
 105         usleep_range(15000, 16000);
 106
 107         gpiod_set_value_cansleep(innolux->enable_gpio, 1);
 108
 109         /* T4: 15ms - 1000ms */
 110         usleep_range(15000, 16000);
 111
 112         err = mipi_dsi_dcs_exit_sleep_mode(innolux->link);
 113         if (err < 0) {
 114                 DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n",
 115                               err);
 116                 goto poweroff;
 117         }
 118
 119         /* T6: 120ms - 1000ms*/
 120         msleep(120);
 121
 122         err = mipi_dsi_dcs_set_display_on(innolux->link);
 123         if (err < 0) {
 124                 DRM_DEV_ERROR(panel->dev, "failed to set display on: %d\n",
 125                               err);
 126                 goto poweroff;
 127         }
 128
 129         /* T7: 5ms */
 130         usleep_range(5000, 6000);
 131
 132         innolux->prepared = true;
 133
 134         return 0;
 135
 136 poweroff:
 137         regulator_err = regulator_disable(innolux->supply);
 138         if (regulator_err)
 139                 DRM_DEV_ERROR(panel->dev, "failed to disable regulator: %d\n",
 140                               regulator_err);
 141
 142         gpiod_set_value_cansleep(innolux->enable_gpio, 0);
 143         return err;
 144 }
 145
 146 static int innolux_panel_enable(struct drm_panel *panel)
 147 {
 148         struct innolux_panel *innolux = to_innolux_panel(panel);
 149         int ret;
 150
 151         if (innolux->enabled)
 152                 return 0;
 153
 154         innolux->backlight->props.power = FB_BLANK_UNBLANK;
 155         ret = backlight_update_status(innolux->backlight);
 156         if (ret) {
 157                 DRM_DEV_ERROR(panel->drm->dev,
 158                               "Failed to enable backlight %d\n", ret);
 159                 return ret;
 160         }
 161
 162         innolux->enabled = true;
 163
 164         return 0;
 165 }
 166
 167 static const struct drm_display_mode default_mode = {
 168         .clock = 56900,
 169         .hdisplay = 768,
 170         .hsync_start = 768 + 40,
 171         .hsync_end = 768 + 40 + 40,
 172         .htotal = 768 + 40 + 40 + 40,
 173         .vdisplay = 1024,
 174         .vsync_start = 1024 + 20,
 175         .vsync_end = 1024 + 20 + 4,
 176         .vtotal = 1024 + 20 + 4 + 20,
 177         .vrefresh = 60,
 178 };
 179
 180 static int innolux_panel_get_modes(struct drm_panel *panel)
 181 {
 182         struct drm_display_mode *mode;
 183
 184         mode = drm_mode_duplicate(panel->drm, &default_mode);
 185         if (!mode) {
 186                 DRM_DEV_ERROR(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
 187                               default_mode.hdisplay, default_mode.vdisplay,
 188                               default_mode.vrefresh);
 189                 return -ENOMEM;
 190         }
 191
 192         drm_mode_set_name(mode);
 193
 194         drm_mode_probed_add(panel->connector, mode);
 195
 196         panel->connector->display_info.width_mm = 120;
 197         panel->connector->display_info.height_mm = 160;
 198         panel->connector->display_info.bpc = 8;
 199
 200         return 1;
 201 }
 202
 203 static const struct drm_panel_funcs innolux_panel_funcs = {
 204         .disable = innolux_panel_disable,
 205         .unprepare = innolux_panel_unprepare,
 206         .prepare = innolux_panel_prepare,
 207         .enable = innolux_panel_enable,
 208         .get_modes = innolux_panel_get_modes,
 209 };
 210
 211 static const struct of_device_id innolux_of_match[] = {
 212         { .compatible = "innolux,p079zca", },
 213         { }
 214 };
 215 MODULE_DEVICE_TABLE(of, innolux_of_match);
 216
 217 static int innolux_panel_add(struct innolux_panel *innolux)
 218 {
 219         struct device *dev = &innolux->link->dev;
 220         struct device_node *np;
 221         int err;
 222
 223         innolux->supply = devm_regulator_get(dev, "power");
 224         if (IS_ERR(innolux->supply))
 225                 return PTR_ERR(innolux->supply);
 226
 227         innolux->enable_gpio = devm_gpiod_get_optional(dev, "enable",
 228                                                        GPIOD_OUT_HIGH);
 229         if (IS_ERR(innolux->enable_gpio)) {
 230                 err = PTR_ERR(innolux->enable_gpio);
 231                 dev_dbg(dev, "failed to get enable gpio: %d\n", err);
 232                 innolux->enable_gpio = NULL;
 233         }
 234
 235         np = of_parse_phandle(dev->of_node, "backlight", 0);
 236         if (np) {
 237                 innolux->backlight = of_find_backlight_by_node(np);
 238                 of_node_put(np);
 239
 240                 if (!innolux->backlight)
 241                         return -EPROBE_DEFER;
 242         }
 243
 244         drm_panel_init(&innolux->base);
 245         innolux->base.funcs = &innolux_panel_funcs;
 246         innolux->base.dev = &innolux->link->dev;
 247
 248         err = drm_panel_add(&innolux->base);
 249         if (err < 0)
 250                 goto put_backlight;
 251
 252         return 0;
 253
 254 put_backlight:
 255         put_device(&innolux->backlight->dev);
 256
 257         return err;
 258 }
 259
 260 static void innolux_panel_del(struct innolux_panel *innolux)
 261 {
 262         if (innolux->base.dev)
 263                 drm_panel_remove(&innolux->base);
 264
 265         put_device(&innolux->backlight->dev);
 266 }
 267
 268 static int innolux_panel_probe(struct mipi_dsi_device *dsi)
 269 {
 270         struct innolux_panel *innolux;
 271         int err;
 272
 273         dsi->lanes = 4;
 274         dsi->format = MIPI_DSI_FMT_RGB888;
 275         dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
 276                           MIPI_DSI_MODE_LPM;
 277
 278         innolux = devm_kzalloc(&dsi->dev, sizeof(*innolux), GFP_KERNEL);
 279         if (!innolux)
 280                 return -ENOMEM;
 281
 282         mipi_dsi_set_drvdata(dsi, innolux);
 283
 284         innolux->link = dsi;
 285
 286         err = innolux_panel_add(innolux);
 287         if (err < 0)
 288                 return err;
 289
 290         err = mipi_dsi_attach(dsi);
 291         return err;
 292 }
 293
 294 static int innolux_panel_remove(struct mipi_dsi_device *dsi)
 295 {
 296         struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
 297         int err;
 298
 299         err = innolux_panel_unprepare(&innolux->base);
 300         if (err < 0)
 301                 DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n",
 302                               err);
 303
 304         err = innolux_panel_disable(&innolux->base);
 305         if (err < 0)
 306                 DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err);
 307
 308         err = mipi_dsi_detach(dsi);
 309         if (err < 0)
 310                 DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n",
 311                               err);
 312
 313         drm_panel_detach(&innolux->base);
 314         innolux_panel_del(innolux);
 315
 316         return 0;
 317 }
 318
 319 static void innolux_panel_shutdown(struct mipi_dsi_device *dsi)
 320 {
 321         struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
 322
 323         innolux_panel_unprepare(&innolux->base);
 324         innolux_panel_disable(&innolux->base);
 325 }
 326
 327 static struct mipi_dsi_driver innolux_panel_driver = {
 328         .driver = {
 329                 .name = "panel-innolux-p079zca",
 330                 .of_match_table = innolux_of_match,
 331         },
 332         .probe = innolux_panel_probe,
 333         .remove = innolux_panel_remove,
 334         .shutdown = innolux_panel_shutdown,
 335 };
 336 module_mipi_dsi_driver(innolux_panel_driver);
 337
 338 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
 339 MODULE_DESCRIPTION("Innolux P079ZCA panel driver");
 340 MODULE_LICENSE("GPL v2");