drivers/gpu/drm/panel/panel-raydium-rm69380.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree.
   4  * Copyright (c) 2024 David Wronek <[email protected]>
   5  */
   6
   7 #include <linux/backlight.h>
   8 #include <linux/delay.h>
   9 #include <linux/gpio/consumer.h>
  10 #include <linux/module.h>
  11 #include <linux/of.h>
  12 #include <linux/of_device.h>
  13 #include <linux/of_graph.h>
  14 #include <linux/regulator/consumer.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 #include <drm/drm_probe_helper.h>
  22
  23 struct rm69380_panel {
  24         struct drm_panel panel;
  25         struct mipi_dsi_device *dsi[2];
  26         struct regulator_bulk_data supplies[2];
  27         struct gpio_desc *reset_gpio;
  28 };
  29
  30 static inline
  31 struct rm69380_panel *to_rm69380_panel(struct drm_panel *panel)
  32 {
  33         return container_of(panel, struct rm69380_panel, panel);
  34 }
  35
  36 static void rm69380_reset(struct rm69380_panel *ctx)
  37 {
  38         gpiod_set_value_cansleep(ctx->reset_gpio, 0);
  39         usleep_range(15000, 16000);
  40         gpiod_set_value_cansleep(ctx->reset_gpio, 1);
  41         usleep_range(10000, 11000);
  42         gpiod_set_value_cansleep(ctx->reset_gpio, 0);
  43         msleep(30);
  44 }
  45
  46 static int rm69380_on(struct rm69380_panel *ctx)
  47 {
  48         struct mipi_dsi_device *dsi = ctx->dsi[0];
  49         struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
  50
  51         dsi->mode_flags |= MIPI_DSI_MODE_LPM;
  52         if (ctx->dsi[1])
  53                 ctx->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM;
  54
  55         mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0xd4);
  56         mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x00, 0x80);
  57         mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0xd0);
  58         mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x48, 0x00);
  59         mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0x26);
  60         mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x75, 0x3f);
  61         mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x1d, 0x1a);
  62         mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0x00);
  63         mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x28);
  64         mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc2, 0x08);
  65
  66         mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
  67         mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
  68         mipi_dsi_msleep(&dsi_ctx, 20);
  69
  70         mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
  71         mipi_dsi_msleep(&dsi_ctx, 36);
  72
  73         return dsi_ctx.accum_err;
  74 }
  75
  76 static void rm69380_off(struct rm69380_panel *ctx)
  77 {
  78         struct mipi_dsi_device *dsi = ctx->dsi[0];
  79         struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
  80
  81         dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
  82         if (ctx->dsi[1])
  83                 ctx->dsi[1]->mode_flags &= ~MIPI_DSI_MODE_LPM;
  84
  85         mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
  86         mipi_dsi_msleep(&dsi_ctx, 35);
  87         mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
  88         mipi_dsi_msleep(&dsi_ctx, 20);
  89 }
  90
  91 static int rm69380_prepare(struct drm_panel *panel)
  92 {
  93         struct rm69380_panel *ctx = to_rm69380_panel(panel);
  94         int ret;
  95
  96         ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
  97         if (ret < 0)
  98                 return ret;
  99
 100         rm69380_reset(ctx);
 101
 102         ret = rm69380_on(ctx);
 103         if (ret < 0) {
 104                 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
 105                 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
 106         }
 107
 108         return ret;
 109 }
 110
 111 static int rm69380_unprepare(struct drm_panel *panel)
 112 {
 113         struct rm69380_panel *ctx = to_rm69380_panel(panel);
 114
 115         rm69380_off(ctx);
 116
 117         gpiod_set_value_cansleep(ctx->reset_gpio, 1);
 118         regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
 119
 120         return 0;
 121 }
 122
 123 static const struct drm_display_mode rm69380_mode = {
 124         .clock = (2560 + 32 + 12 + 38) * (1600 + 20 + 4 + 8) * 90 / 1000,
 125         .hdisplay = 2560,
 126         .hsync_start = 2560 + 32,
 127         .hsync_end = 2560 + 32 + 12,
 128         .htotal = 2560 + 32 + 12 + 38,
 129         .vdisplay = 1600,
 130         .vsync_start = 1600 + 20,
 131         .vsync_end = 1600 + 20 + 4,
 132         .vtotal = 1600 + 20 + 4 + 8,
 133         .width_mm = 248,
 134         .height_mm = 155,
 135         .type = DRM_MODE_TYPE_DRIVER,
 136 };
 137
 138 static int rm69380_get_modes(struct drm_panel *panel,
 139                                         struct drm_connector *connector)
 140 {
 141         return drm_connector_helper_get_modes_fixed(connector, &rm69380_mode);
 142 }
 143
 144 static const struct drm_panel_funcs rm69380_panel_funcs = {
 145         .prepare = rm69380_prepare,
 146         .unprepare = rm69380_unprepare,
 147         .get_modes = rm69380_get_modes,
 148 };
 149
 150 static int rm69380_bl_update_status(struct backlight_device *bl)
 151 {
 152         struct mipi_dsi_device *dsi = bl_get_data(bl);
 153         u16 brightness = backlight_get_brightness(bl);
 154         int ret;
 155
 156         dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 157
 158         ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
 159         if (ret < 0)
 160                 return ret;
 161
 162         dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 163
 164         return 0;
 165 }
 166
 167 static int rm69380_bl_get_brightness(struct backlight_device *bl)
 168 {
 169         struct mipi_dsi_device *dsi = bl_get_data(bl);
 170         u16 brightness;
 171         int ret;
 172
 173         dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 174
 175         ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness);
 176         if (ret < 0)
 177                 return ret;
 178
 179         dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 180
 181         return brightness;
 182 }
 183
 184 static const struct backlight_ops rm69380_bl_ops = {
 185         .update_status = rm69380_bl_update_status,
 186         .get_brightness = rm69380_bl_get_brightness,
 187 };
 188
 189 static struct backlight_device *
 190 rm69380_create_backlight(struct mipi_dsi_device *dsi)
 191 {
 192         struct device *dev = &dsi->dev;
 193         const struct backlight_properties props = {
 194                 .type = BACKLIGHT_RAW,
 195                 .brightness = 511,
 196                 .max_brightness = 2047,
 197         };
 198
 199         return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
 200                                               &rm69380_bl_ops, &props);
 201 }
 202
 203 static int rm69380_probe(struct mipi_dsi_device *dsi)
 204 {
 205         struct mipi_dsi_host *dsi_sec_host;
 206         struct rm69380_panel *ctx;
 207         struct device *dev = &dsi->dev;
 208         struct device_node *dsi_sec;
 209         int ret, i;
 210
 211         ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
 212         if (!ctx)
 213                 return -ENOMEM;
 214
 215         ctx->supplies[0].supply = "vddio";
 216         ctx->supplies[1].supply = "avdd";
 217         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
 218                                       ctx->supplies);
 219         if (ret < 0)
 220                 return dev_err_probe(dev, ret, "Failed to get regulators\n");
 221
 222         ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
 223         if (IS_ERR(ctx->reset_gpio))
 224                 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
 225                                      "Failed to get reset-gpios\n");
 226
 227         dsi_sec = of_graph_get_remote_node(dsi->dev.of_node, 1, -1);
 228
 229         if (dsi_sec) {
 230                 const struct mipi_dsi_device_info info = { "RM69380 DSI1", 0,
 231                                                            dsi_sec };
 232
 233                 dsi_sec_host = of_find_mipi_dsi_host_by_node(dsi_sec);
 234                 of_node_put(dsi_sec);
 235                 if (!dsi_sec_host)
 236                         return dev_err_probe(dev, -EPROBE_DEFER,
 237                                              "Cannot get secondary DSI host\n");
 238
 239                 ctx->dsi[1] =
 240                         devm_mipi_dsi_device_register_full(dev, dsi_sec_host, &info);
 241                 if (IS_ERR(ctx->dsi[1]))
 242                         return dev_err_probe(dev, PTR_ERR(ctx->dsi[1]),
 243                                              "Cannot get secondary DSI node\n");
 244
 245                 mipi_dsi_set_drvdata(ctx->dsi[1], ctx);
 246         }
 247
 248         ctx->dsi[0] = dsi;
 249         mipi_dsi_set_drvdata(dsi, ctx);
 250
 251         drm_panel_init(&ctx->panel, dev, &rm69380_panel_funcs,
 252                        DRM_MODE_CONNECTOR_DSI);
 253         ctx->panel.prepare_prev_first = true;
 254
 255         ctx->panel.backlight = rm69380_create_backlight(dsi);
 256         if (IS_ERR(ctx->panel.backlight))
 257                 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
 258                                      "Failed to create backlight\n");
 259
 260         drm_panel_add(&ctx->panel);
 261
 262         for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) {
 263                 if (!ctx->dsi[i])
 264                         continue;
 265
 266                 dev_dbg(&ctx->dsi[i]->dev, "Binding DSI %d\n", i);
 267
 268                 ctx->dsi[i]->lanes = 4;
 269                 ctx->dsi[i]->format = MIPI_DSI_FMT_RGB888;
 270                 ctx->dsi[i]->mode_flags = MIPI_DSI_MODE_VIDEO_BURST |
 271                                           MIPI_DSI_CLOCK_NON_CONTINUOUS;
 272
 273                 ret = devm_mipi_dsi_attach(dev, ctx->dsi[i]);
 274                 if (ret < 0) {
 275                         drm_panel_remove(&ctx->panel);
 276                         return dev_err_probe(dev, ret,
 277                                              "Failed to attach to DSI%d\n", i);
 278                 }
 279         }
 280
 281         return 0;
 282 }
 283
 284 static void rm69380_remove(struct mipi_dsi_device *dsi)
 285 {
 286         struct rm69380_panel *ctx = mipi_dsi_get_drvdata(dsi);
 287
 288         drm_panel_remove(&ctx->panel);
 289 }
 290
 291 static const struct of_device_id rm69380_of_match[] = {
 292         { .compatible = "lenovo,j716f-edo-rm69380" },
 293         { /* sentinel */ }
 294 };
 295 MODULE_DEVICE_TABLE(of, rm69380_of_match);
 296
 297 static struct mipi_dsi_driver rm69380_panel_driver = {
 298         .probe = rm69380_probe,
 299         .remove = rm69380_remove,
 300         .driver = {
 301                 .name = "panel-raydium-rm69380",
 302                 .of_match_table = rm69380_of_match,
 303         },
 304 };
 305 module_mipi_dsi_driver(rm69380_panel_driver);
 306
 307 MODULE_AUTHOR("David Wronek <[email protected]");
 308 MODULE_DESCRIPTION("DRM driver for Raydium RM69380-equipped DSI panels");
 309 MODULE_LICENSE("GPL");