drivers/gpu/drm/panel/panel-samsung-sofef00.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* Copyright (c) 2020 Caleb Connolly <caleb@connolly.tech>
   3  * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
   4  * Copyright (c) 2020, The Linux Foundation. All rights reserved.
   5  */
   6
   7 #include <linux/delay.h>
   8 #include <linux/gpio/consumer.h>
   9 #include <linux/module.h>
  10 #include <linux/of.h>
  11 #include <linux/of_device.h>
  12 #include <linux/regulator/consumer.h>
  13 #include <linux/swab.h>
  14 #include <linux/backlight.h>
  15
  16 #include <video/mipi_display.h>
  17
  18 #include <drm/drm_mipi_dsi.h>
  19 #include <drm/drm_modes.h>
  20 #include <drm/drm_panel.h>
  21
  22 struct sofef00_panel {
  23         struct drm_panel panel;
  24         struct mipi_dsi_device *dsi;
  25         struct regulator *supply;
  26         struct gpio_desc *reset_gpio;
  27         const struct drm_display_mode *mode;
  28         bool prepared;
  29 };
  30
  31 static inline
  32 struct sofef00_panel *to_sofef00_panel(struct drm_panel *panel)
  33 {
  34         return container_of(panel, struct sofef00_panel, panel);
  35 }
  36
  37 #define dsi_dcs_write_seq(dsi, seq...) do {                             \
  38                 static const u8 d[] = { seq };                          \
  39                 int ret;                                                \
  40                 ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d)); \
  41                 if (ret < 0)                                            \
  42                         return ret;                                     \
  43         } while (0)
  44
  45 static void sofef00_panel_reset(struct sofef00_panel *ctx)
  46 {
  47         gpiod_set_value_cansleep(ctx->reset_gpio, 0);
  48         usleep_range(5000, 6000);
  49         gpiod_set_value_cansleep(ctx->reset_gpio, 1);
  50         usleep_range(2000, 3000);
  51         gpiod_set_value_cansleep(ctx->reset_gpio, 0);
  52         usleep_range(12000, 13000);
  53 }
  54
  55 static int sofef00_panel_on(struct sofef00_panel *ctx)
  56 {
  57         struct mipi_dsi_device *dsi = ctx->dsi;
  58         struct device *dev = &dsi->dev;
  59         int ret;
  60
  61         dsi->mode_flags |= MIPI_DSI_MODE_LPM;
  62
  63         ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
  64         if (ret < 0) {
  65                 dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
  66                 return ret;
  67         }
  68         usleep_range(10000, 11000);
  69
  70         dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
  71
  72         ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
  73         if (ret < 0) {
  74                 dev_err(dev, "Failed to set tear on: %d\n", ret);
  75                 return ret;
  76         }
  77
  78         dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
  79         dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
  80         dsi_dcs_write_seq(dsi, 0xb0, 0x07);
  81         dsi_dcs_write_seq(dsi, 0xb6, 0x12);
  82         dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
  83         dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
  84         dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
  85
  86         ret = mipi_dsi_dcs_set_display_on(dsi);
  87         if (ret < 0) {
  88                 dev_err(dev, "Failed to set display on: %d\n", ret);
  89                 return ret;
  90         }
  91
  92         return 0;
  93 }
  94
  95 static int sofef00_panel_off(struct sofef00_panel *ctx)
  96 {
  97         struct mipi_dsi_device *dsi = ctx->dsi;
  98         struct device *dev = &dsi->dev;
  99         int ret;
 100
 101         dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 102
 103         ret = mipi_dsi_dcs_set_display_off(dsi);
 104         if (ret < 0) {
 105                 dev_err(dev, "Failed to set display off: %d\n", ret);
 106                 return ret;
 107         }
 108         msleep(40);
 109
 110         ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
 111         if (ret < 0) {
 112                 dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
 113                 return ret;
 114         }
 115         msleep(160);
 116
 117         return 0;
 118 }
 119
 120 static int sofef00_panel_prepare(struct drm_panel *panel)
 121 {
 122         struct sofef00_panel *ctx = to_sofef00_panel(panel);
 123         struct device *dev = &ctx->dsi->dev;
 124         int ret;
 125
 126         if (ctx->prepared)
 127                 return 0;
 128
 129         ret = regulator_enable(ctx->supply);
 130         if (ret < 0) {
 131                 dev_err(dev, "Failed to enable regulator: %d\n", ret);
 132                 return ret;
 133         }
 134
 135         sofef00_panel_reset(ctx);
 136
 137         ret = sofef00_panel_on(ctx);
 138         if (ret < 0) {
 139                 dev_err(dev, "Failed to initialize panel: %d\n", ret);
 140                 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
 141                 return ret;
 142         }
 143
 144         ctx->prepared = true;
 145         return 0;
 146 }
 147
 148 static int sofef00_panel_unprepare(struct drm_panel *panel)
 149 {
 150         struct sofef00_panel *ctx = to_sofef00_panel(panel);
 151         struct device *dev = &ctx->dsi->dev;
 152         int ret;
 153
 154         if (!ctx->prepared)
 155                 return 0;
 156
 157         ret = sofef00_panel_off(ctx);
 158         if (ret < 0)
 159                 dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
 160
 161         regulator_disable(ctx->supply);
 162
 163         ctx->prepared = false;
 164         return 0;
 165 }
 166
 167 static const struct drm_display_mode enchilada_panel_mode = {
 168         .clock = (1080 + 112 + 16 + 36) * (2280 + 36 + 8 + 12) * 60 / 1000,
 169         .hdisplay = 1080,
 170         .hsync_start = 1080 + 112,
 171         .hsync_end = 1080 + 112 + 16,
 172         .htotal = 1080 + 112 + 16 + 36,
 173         .vdisplay = 2280,
 174         .vsync_start = 2280 + 36,
 175         .vsync_end = 2280 + 36 + 8,
 176         .vtotal = 2280 + 36 + 8 + 12,
 177         .width_mm = 68,
 178         .height_mm = 145,
 179 };
 180
 181 static const struct drm_display_mode fajita_panel_mode = {
 182         .clock = (1080 + 72 + 16 + 36) * (2340 + 32 + 4 + 18) * 60 / 1000,
 183         .hdisplay = 1080,
 184         .hsync_start = 1080 + 72,
 185         .hsync_end = 1080 + 72 + 16,
 186         .htotal = 1080 + 72 + 16 + 36,
 187         .vdisplay = 2340,
 188         .vsync_start = 2340 + 32,
 189         .vsync_end = 2340 + 32 + 4,
 190         .vtotal = 2340 + 32 + 4 + 18,
 191         .width_mm = 68,
 192         .height_mm = 145,
 193 };
 194
 195 static int sofef00_panel_get_modes(struct drm_panel *panel, struct drm_connector *connector)
 196 {
 197         struct drm_display_mode *mode;
 198         struct sofef00_panel *ctx = to_sofef00_panel(panel);
 199
 200         mode = drm_mode_duplicate(connector->dev, ctx->mode);
 201         if (!mode)
 202                 return -ENOMEM;
 203
 204         drm_mode_set_name(mode);
 205
 206         mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
 207         connector->display_info.width_mm = mode->width_mm;
 208         connector->display_info.height_mm = mode->height_mm;
 209         drm_mode_probed_add(connector, mode);
 210
 211         return 1;
 212 }
 213
 214 static const struct drm_panel_funcs sofef00_panel_panel_funcs = {
 215         .prepare = sofef00_panel_prepare,
 216         .unprepare = sofef00_panel_unprepare,
 217         .get_modes = sofef00_panel_get_modes,
 218 };
 219
 220 static int sofef00_panel_bl_update_status(struct backlight_device *bl)
 221 {
 222         struct mipi_dsi_device *dsi = bl_get_data(bl);
 223         int err;
 224         u16 brightness;
 225
 226         brightness = (u16)backlight_get_brightness(bl);
 227         // This panel needs the high and low bytes swapped for the brightness value
 228         brightness = __swab16(brightness);
 229
 230         err = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
 231         if (err < 0)
 232                 return err;
 233
 234         return 0;
 235 }
 236
 237 static const struct backlight_ops sofef00_panel_bl_ops = {
 238         .update_status = sofef00_panel_bl_update_status,
 239 };
 240
 241 static struct backlight_device *
 242 sofef00_create_backlight(struct mipi_dsi_device *dsi)
 243 {
 244         struct device *dev = &dsi->dev;
 245         const struct backlight_properties props = {
 246                 .type = BACKLIGHT_PLATFORM,
 247                 .brightness = 1023,
 248                 .max_brightness = 1023,
 249         };
 250
 251         return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
 252                                               &sofef00_panel_bl_ops, &props);
 253 }
 254
 255 static int sofef00_panel_probe(struct mipi_dsi_device *dsi)
 256 {
 257         struct device *dev = &dsi->dev;
 258         struct sofef00_panel *ctx;
 259         int ret;
 260
 261         ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
 262         if (!ctx)
 263                 return -ENOMEM;
 264
 265         ctx->mode = of_device_get_match_data(dev);
 266
 267         if (!ctx->mode) {
 268                 dev_err(dev, "Missing device mode\n");
 269                 return -ENODEV;
 270         }
 271
 272         ctx->supply = devm_regulator_get(dev, "vddio");
 273         if (IS_ERR(ctx->supply)) {
 274                 ret = PTR_ERR(ctx->supply);
 275                 dev_err(dev, "Failed to get vddio regulator: %d\n", ret);
 276                 return ret;
 277         }
 278
 279         ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
 280         if (IS_ERR(ctx->reset_gpio)) {
 281                 ret = PTR_ERR(ctx->reset_gpio);
 282                 dev_warn(dev, "Failed to get reset-gpios: %d\n", ret);
 283                 return ret;
 284         }
 285
 286         ctx->dsi = dsi;
 287         mipi_dsi_set_drvdata(dsi, ctx);
 288
 289         dsi->lanes = 4;
 290         dsi->format = MIPI_DSI_FMT_RGB888;
 291
 292         drm_panel_init(&ctx->panel, dev, &sofef00_panel_panel_funcs,
 293                        DRM_MODE_CONNECTOR_DSI);
 294
 295         ctx->panel.backlight = sofef00_create_backlight(dsi);
 296         if (IS_ERR(ctx->panel.backlight))
 297                 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
 298                                      "Failed to create backlight\n");
 299
 300         drm_panel_add(&ctx->panel);
 301
 302         ret = mipi_dsi_attach(dsi);
 303         if (ret < 0) {
 304                 dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
 305                 return ret;
 306         }
 307
 308         return 0;
 309 }
 310
 311 static int sofef00_panel_remove(struct mipi_dsi_device *dsi)
 312 {
 313         struct sofef00_panel *ctx = mipi_dsi_get_drvdata(dsi);
 314         int ret;
 315
 316         ret = mipi_dsi_detach(dsi);
 317         if (ret < 0)
 318                 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
 319
 320         drm_panel_remove(&ctx->panel);
 321
 322         return 0;
 323 }
 324
 325 static const struct of_device_id sofef00_panel_of_match[] = {
 326         { // OnePlus 6 / enchilada
 327                 .compatible = "samsung,sofef00",
 328                 .data = &enchilada_panel_mode,
 329         },
 330         { // OnePlus 6T / fajita
 331                 .compatible = "samsung,s6e3fc2x01",
 332                 .data = &fajita_panel_mode,
 333         },
 334         { /* sentinel */ }
 335 };
 336 MODULE_DEVICE_TABLE(of, sofef00_panel_of_match);
 337
 338 static struct mipi_dsi_driver sofef00_panel_driver = {
 339         .probe = sofef00_panel_probe,
 340         .remove = sofef00_panel_remove,
 341         .driver = {
 342                 .name = "panel-oneplus6",
 343                 .of_match_table = sofef00_panel_of_match,
 344         },
 345 };
 346
 347 module_mipi_dsi_driver(sofef00_panel_driver);
 348
 349 MODULE_AUTHOR("Caleb Connolly <caleb@connolly.tech>");
 350 MODULE_DESCRIPTION("DRM driver for Samsung AMOLED DSI panels found in OnePlus 6/6T phones");
 351 MODULE_LICENSE("GPL v2");