kernel/drivers/gpu/drm/i2c/ch7006_drv.c

   1 /*
   2  * Copyright (C) 2009 Francisco Jerez.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include <linux/module.h>
  28
  29 #include "ch7006_priv.h"
  30
  31 /* DRM encoder functions */
  32
  33 static void ch7006_encoder_set_config(struct drm_encoder *encoder,
  34                                       void *params)
  35 {
  36         struct ch7006_priv *priv = to_ch7006_priv(encoder);
  37
  38         priv->params = *(struct ch7006_encoder_params *)params;
  39 }
  40
  41 static void ch7006_encoder_destroy(struct drm_encoder *encoder)
  42 {
  43         struct ch7006_priv *priv = to_ch7006_priv(encoder);
  44
  45         drm_property_destroy(encoder->dev, priv->scale_property);
  46
  47         kfree(priv);
  48         to_encoder_slave(encoder)->slave_priv = NULL;
  49
  50         drm_i2c_encoder_destroy(encoder);
  51 }
  52
  53 static void  ch7006_encoder_dpms(struct drm_encoder *encoder, int mode)
  54 {
  55         struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
  56         struct ch7006_priv *priv = to_ch7006_priv(encoder);
  57         struct ch7006_state *state = &priv->state;
  58
  59         ch7006_dbg(client, "\n");
  60
  61         if (mode == priv->last_dpms)
  62                 return;
  63         priv->last_dpms = mode;
  64
  65         ch7006_setup_power_state(encoder);
  66
  67         ch7006_load_reg(client, state, CH7006_POWER);
  68 }
  69
  70 static void ch7006_encoder_save(struct drm_encoder *encoder)
  71 {
  72         struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
  73         struct ch7006_priv *priv = to_ch7006_priv(encoder);
  74
  75         ch7006_dbg(client, "\n");
  76
  77         ch7006_state_save(client, &priv->saved_state);
  78 }
  79
  80 static void ch7006_encoder_restore(struct drm_encoder *encoder)
  81 {
  82         struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
  83         struct ch7006_priv *priv = to_ch7006_priv(encoder);
  84
  85         ch7006_dbg(client, "\n");
  86
  87         ch7006_state_load(client, &priv->saved_state);
  88 }
  89
  90 static bool ch7006_encoder_mode_fixup(struct drm_encoder *encoder,
  91                                       const struct drm_display_mode *mode,
  92                                       struct drm_display_mode *adjusted_mode)
  93 {
  94         struct ch7006_priv *priv = to_ch7006_priv(encoder);
  95
  96         /* The ch7006 is painfully picky with the input timings so no
  97          * custom modes for now... */
  98
  99         priv->mode = ch7006_lookup_mode(encoder, mode);
 100
 101         return !!priv->mode;
 102 }
 103
 104 static int ch7006_encoder_mode_valid(struct drm_encoder *encoder,
 105                                      struct drm_display_mode *mode)
 106 {
 107         if (ch7006_lookup_mode(encoder, mode))
 108                 return MODE_OK;
 109         else
 110                 return MODE_BAD;
 111 }
 112
 113 static void ch7006_encoder_mode_set(struct drm_encoder *encoder,
 114                                      struct drm_display_mode *drm_mode,
 115                                      struct drm_display_mode *adjusted_mode)
 116 {
 117         struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
 118         struct ch7006_priv *priv = to_ch7006_priv(encoder);
 119         struct ch7006_encoder_params *params = &priv->params;
 120         struct ch7006_state *state = &priv->state;
 121         uint8_t *regs = state->regs;
 122         struct ch7006_mode *mode = priv->mode;
 123         struct ch7006_tv_norm_info *norm = &ch7006_tv_norms[priv->norm];
 124         int start_active;
 125
 126         ch7006_dbg(client, "\n");
 127
 128         regs[CH7006_DISPMODE] = norm->dispmode | mode->dispmode;
 129         regs[CH7006_BWIDTH] = 0;
 130         regs[CH7006_INPUT_FORMAT] = bitf(CH7006_INPUT_FORMAT_FORMAT,
 131                                          params->input_format);
 132
 133         regs[CH7006_CLKMODE] = CH7006_CLKMODE_SUBC_LOCK
 134                 | bitf(CH7006_CLKMODE_XCM, params->xcm)
 135                 | bitf(CH7006_CLKMODE_PCM, params->pcm);
 136         if (params->clock_mode)
 137                 regs[CH7006_CLKMODE] |= CH7006_CLKMODE_MASTER;
 138         if (params->clock_edge)
 139                 regs[CH7006_CLKMODE] |= CH7006_CLKMODE_POS_EDGE;
 140
 141         start_active = (drm_mode->htotal & ~0x7) - (drm_mode->hsync_start & ~0x7);
 142         regs[CH7006_POV] = bitf(CH7006_POV_START_ACTIVE_8, start_active);
 143         regs[CH7006_START_ACTIVE] = bitf(CH7006_START_ACTIVE_0, start_active);
 144
 145         regs[CH7006_INPUT_SYNC] = 0;
 146         if (params->sync_direction)
 147                 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_OUTPUT;
 148         if (params->sync_encoding)
 149                 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_EMBEDDED;
 150         if (drm_mode->flags & DRM_MODE_FLAG_PVSYNC)
 151                 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_PVSYNC;
 152         if (drm_mode->flags & DRM_MODE_FLAG_PHSYNC)
 153                 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_PHSYNC;
 154
 155         regs[CH7006_DETECT] = 0;
 156         regs[CH7006_BCLKOUT] = 0;
 157
 158         regs[CH7006_SUBC_INC3] = 0;
 159         if (params->pout_level)
 160                 regs[CH7006_SUBC_INC3] |= CH7006_SUBC_INC3_POUT_3_3V;
 161
 162         regs[CH7006_SUBC_INC4] = 0;
 163         if (params->active_detect)
 164                 regs[CH7006_SUBC_INC4] |= CH7006_SUBC_INC4_DS_INPUT;
 165
 166         regs[CH7006_PLL_CONTROL] = priv->saved_state.regs[CH7006_PLL_CONTROL];
 167
 168         ch7006_setup_levels(encoder);
 169         ch7006_setup_subcarrier(encoder);
 170         ch7006_setup_pll(encoder);
 171         ch7006_setup_power_state(encoder);
 172         ch7006_setup_properties(encoder);
 173
 174         ch7006_state_load(client, state);
 175 }
 176
 177 static enum drm_connector_status ch7006_encoder_detect(struct drm_encoder *encoder,
 178                                                        struct drm_connector *connector)
 179 {
 180         struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
 181         struct ch7006_priv *priv = to_ch7006_priv(encoder);
 182         struct ch7006_state *state = &priv->state;
 183         int det;
 184
 185         ch7006_dbg(client, "\n");
 186
 187         ch7006_save_reg(client, state, CH7006_DETECT);
 188         ch7006_save_reg(client, state, CH7006_POWER);
 189         ch7006_save_reg(client, state, CH7006_CLKMODE);
 190
 191         ch7006_write(client, CH7006_POWER, CH7006_POWER_RESET |
 192                                            bitfs(CH7006_POWER_LEVEL, NORMAL));
 193         ch7006_write(client, CH7006_CLKMODE, CH7006_CLKMODE_MASTER);
 194
 195         ch7006_write(client, CH7006_DETECT, CH7006_DETECT_SENSE);
 196
 197         ch7006_write(client, CH7006_DETECT, 0);
 198
 199         det = ch7006_read(client, CH7006_DETECT);
 200
 201         ch7006_load_reg(client, state, CH7006_CLKMODE);
 202         ch7006_load_reg(client, state, CH7006_POWER);
 203         ch7006_load_reg(client, state, CH7006_DETECT);
 204
 205         if ((det & (CH7006_DETECT_SVIDEO_Y_TEST|
 206                     CH7006_DETECT_SVIDEO_C_TEST|
 207                     CH7006_DETECT_CVBS_TEST)) == 0)
 208                 priv->subconnector = DRM_MODE_SUBCONNECTOR_SCART;
 209         else if ((det & (CH7006_DETECT_SVIDEO_Y_TEST|
 210                          CH7006_DETECT_SVIDEO_C_TEST)) == 0)
 211                 priv->subconnector = DRM_MODE_SUBCONNECTOR_SVIDEO;
 212         else if ((det & CH7006_DETECT_CVBS_TEST) == 0)
 213                 priv->subconnector = DRM_MODE_SUBCONNECTOR_Composite;
 214         else
 215                 priv->subconnector = DRM_MODE_SUBCONNECTOR_Unknown;
 216
 217         drm_object_property_set_value(&connector->base,
 218                         encoder->dev->mode_config.tv_subconnector_property,
 219                                                         priv->subconnector);
 220
 221         return priv->subconnector ? connector_status_connected :
 222                                         connector_status_disconnected;
 223 }
 224
 225 static int ch7006_encoder_get_modes(struct drm_encoder *encoder,
 226                                     struct drm_connector *connector)
 227 {
 228         struct ch7006_priv *priv = to_ch7006_priv(encoder);
 229         struct ch7006_mode *mode;
 230         int n = 0;
 231
 232         for (mode = ch7006_modes; mode->mode.clock; mode++) {
 233                 if (~mode->valid_scales & 1<<priv->scale ||
 234                     ~mode->valid_norms & 1<<priv->norm)
 235                         continue;
 236
 237                 drm_mode_probed_add(connector,
 238                                 drm_mode_duplicate(encoder->dev, &mode->mode));
 239
 240                 n++;
 241         }
 242
 243         return n;
 244 }
 245
 246 static int ch7006_encoder_create_resources(struct drm_encoder *encoder,
 247                                            struct drm_connector *connector)
 248 {
 249         struct ch7006_priv *priv = to_ch7006_priv(encoder);
 250         struct drm_device *dev = encoder->dev;
 251         struct drm_mode_config *conf = &dev->mode_config;
 252
 253         drm_mode_create_tv_properties(dev, NUM_TV_NORMS, ch7006_tv_norm_names);
 254
 255         priv->scale_property = drm_property_create_range(dev, 0, "scale", 0, 2);
 256
 257         drm_object_attach_property(&connector->base, conf->tv_select_subconnector_property,
 258                                       priv->select_subconnector);
 259         drm_object_attach_property(&connector->base, conf->tv_subconnector_property,
 260                                       priv->subconnector);
 261         drm_object_attach_property(&connector->base, conf->tv_left_margin_property,
 262                                       priv->hmargin);
 263         drm_object_attach_property(&connector->base, conf->tv_bottom_margin_property,
 264                                       priv->vmargin);
 265         drm_object_attach_property(&connector->base, conf->tv_mode_property,
 266                                       priv->norm);
 267         drm_object_attach_property(&connector->base, conf->tv_brightness_property,
 268                                       priv->brightness);
 269         drm_object_attach_property(&connector->base, conf->tv_contrast_property,
 270                                       priv->contrast);
 271         drm_object_attach_property(&connector->base, conf->tv_flicker_reduction_property,
 272                                       priv->flicker);
 273         drm_object_attach_property(&connector->base, priv->scale_property,
 274                                       priv->scale);
 275
 276         return 0;
 277 }
 278
 279 static int ch7006_encoder_set_property(struct drm_encoder *encoder,
 280                                        struct drm_connector *connector,
 281                                        struct drm_property *property,
 282                                        uint64_t val)
 283 {
 284         struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
 285         struct ch7006_priv *priv = to_ch7006_priv(encoder);
 286         struct ch7006_state *state = &priv->state;
 287         struct drm_mode_config *conf = &encoder->dev->mode_config;
 288         struct drm_crtc *crtc = encoder->crtc;
 289         bool modes_changed = false;
 290
 291         ch7006_dbg(client, "\n");
 292
 293         if (property == conf->tv_select_subconnector_property) {
 294                 priv->select_subconnector = val;
 295
 296                 ch7006_setup_power_state(encoder);
 297
 298                 ch7006_load_reg(client, state, CH7006_POWER);
 299
 300         } else if (property == conf->tv_left_margin_property) {
 301                 priv->hmargin = val;
 302
 303                 ch7006_setup_properties(encoder);
 304
 305                 ch7006_load_reg(client, state, CH7006_POV);
 306                 ch7006_load_reg(client, state, CH7006_HPOS);
 307
 308         } else if (property == conf->tv_bottom_margin_property) {
 309                 priv->vmargin = val;
 310
 311                 ch7006_setup_properties(encoder);
 312
 313                 ch7006_load_reg(client, state, CH7006_POV);
 314                 ch7006_load_reg(client, state, CH7006_VPOS);
 315
 316         } else if (property == conf->tv_mode_property) {
 317                 if (connector->dpms != DRM_MODE_DPMS_OFF)
 318                         return -EINVAL;
 319
 320                 priv->norm = val;
 321
 322                 modes_changed = true;
 323
 324         } else if (property == conf->tv_brightness_property) {
 325                 priv->brightness = val;
 326
 327                 ch7006_setup_levels(encoder);
 328
 329                 ch7006_load_reg(client, state, CH7006_BLACK_LEVEL);
 330
 331         } else if (property == conf->tv_contrast_property) {
 332                 priv->contrast = val;
 333
 334                 ch7006_setup_properties(encoder);
 335
 336                 ch7006_load_reg(client, state, CH7006_CONTRAST);
 337
 338         } else if (property == conf->tv_flicker_reduction_property) {
 339                 priv->flicker = val;
 340
 341                 ch7006_setup_properties(encoder);
 342
 343                 ch7006_load_reg(client, state, CH7006_FFILTER);
 344
 345         } else if (property == priv->scale_property) {
 346                 if (connector->dpms != DRM_MODE_DPMS_OFF)
 347                         return -EINVAL;
 348
 349                 priv->scale = val;
 350
 351                 modes_changed = true;
 352
 353         } else {
 354                 return -EINVAL;
 355         }
 356
 357         if (modes_changed) {
 358                 drm_helper_probe_single_connector_modes(connector, 0, 0);
 359
 360                 /* Disable the crtc to ensure a full modeset is
 361                  * performed whenever it's turned on again. */
 362                 if (crtc) {
 363                         struct drm_mode_set modeset = {
 364                                 .crtc = crtc,
 365                         };
 366
 367                         drm_mode_set_config_internal(&modeset);
 368                 }
 369         }
 370
 371         return 0;
 372 }
 373
 374 static struct drm_encoder_slave_funcs ch7006_encoder_funcs = {
 375         .set_config = ch7006_encoder_set_config,
 376         .destroy = ch7006_encoder_destroy,
 377         .dpms = ch7006_encoder_dpms,
 378         .save = ch7006_encoder_save,
 379         .restore = ch7006_encoder_restore,
 380         .mode_fixup = ch7006_encoder_mode_fixup,
 381         .mode_valid = ch7006_encoder_mode_valid,
 382         .mode_set = ch7006_encoder_mode_set,
 383         .detect = ch7006_encoder_detect,
 384         .get_modes = ch7006_encoder_get_modes,
 385         .create_resources = ch7006_encoder_create_resources,
 386         .set_property = ch7006_encoder_set_property,
 387 };
 388
 389
 390 /* I2C driver functions */
 391
 392 static int ch7006_probe(struct i2c_client *client, const struct i2c_device_id *id)
 393 {
 394         uint8_t addr = CH7006_VERSION_ID;
 395         uint8_t val;
 396         int ret;
 397
 398         ch7006_dbg(client, "\n");
 399
 400         ret = i2c_master_send(client, &addr, sizeof(addr));
 401         if (ret < 0)
 402                 goto fail;
 403
 404         ret = i2c_master_recv(client, &val, sizeof(val));
 405         if (ret < 0)
 406                 goto fail;
 407
 408         ch7006_info(client, "Detected version ID: %x\n", val);
 409
 410         /* I don't know what this is for, but otherwise I get no
 411          * signal.
 412          */
 413         ch7006_write(client, 0x3d, 0x0);
 414
 415         return 0;
 416
 417 fail:
 418         ch7006_err(client, "Error %d reading version ID\n", ret);
 419
 420         return -ENODEV;
 421 }
 422
 423 static int ch7006_remove(struct i2c_client *client)
 424 {
 425         ch7006_dbg(client, "\n");
 426
 427         return 0;
 428 }
 429
 430 static int ch7006_resume(struct device *dev)
 431 {
 432         struct i2c_client *client = to_i2c_client(dev);
 433
 434         ch7006_dbg(client, "\n");
 435
 436         ch7006_write(client, 0x3d, 0x0);
 437
 438         return 0;
 439 }
 440
 441 static int ch7006_encoder_init(struct i2c_client *client,
 442                                struct drm_device *dev,
 443                                struct drm_encoder_slave *encoder)
 444 {
 445         struct ch7006_priv *priv;
 446         int i;
 447
 448         ch7006_dbg(client, "\n");
 449
 450         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 451         if (!priv)
 452                 return -ENOMEM;
 453
 454         encoder->slave_priv = priv;
 455         encoder->slave_funcs = &ch7006_encoder_funcs;
 456
 457         priv->norm = TV_NORM_PAL;
 458         priv->select_subconnector = DRM_MODE_SUBCONNECTOR_Automatic;
 459         priv->subconnector = DRM_MODE_SUBCONNECTOR_Unknown;
 460         priv->scale = 1;
 461         priv->contrast = 50;
 462         priv->brightness = 50;
 463         priv->flicker = 50;
 464         priv->hmargin = 50;
 465         priv->vmargin = 50;
 466         priv->last_dpms = -1;
 467         priv->chip_version = ch7006_read(client, CH7006_VERSION_ID);
 468
 469         if (ch7006_tv_norm) {
 470                 for (i = 0; i < NUM_TV_NORMS; i++) {
 471                         if (!strcmp(ch7006_tv_norm_names[i], ch7006_tv_norm)) {
 472                                 priv->norm = i;
 473                                 break;
 474                         }
 475                 }
 476
 477                 if (i == NUM_TV_NORMS)
 478                         ch7006_err(client, "Invalid TV norm setting \"%s\".\n",
 479                                    ch7006_tv_norm);
 480         }
 481
 482         if (ch7006_scale >= 0 && ch7006_scale <= 2)
 483                 priv->scale = ch7006_scale;
 484         else
 485                 ch7006_err(client, "Invalid scale setting \"%d\".\n",
 486                            ch7006_scale);
 487
 488         return 0;
 489 }
 490
 491 static struct i2c_device_id ch7006_ids[] = {
 492         { "ch7006", 0 },
 493         { }
 494 };
 495 MODULE_DEVICE_TABLE(i2c, ch7006_ids);
 496
 497 static const struct dev_pm_ops ch7006_pm_ops = {
 498         .resume = ch7006_resume,
 499 };
 500
 501 static struct drm_i2c_encoder_driver ch7006_driver = {
 502         .i2c_driver = {
 503                 .probe = ch7006_probe,
 504                 .remove = ch7006_remove,
 505
 506                 .driver = {
 507                         .name = "ch7006",
 508                         .pm = &ch7006_pm_ops,
 509                 },
 510
 511                 .id_table = ch7006_ids,
 512         },
 513
 514         .encoder_init = ch7006_encoder_init,
 515 };
 516
 517
 518 /* Module initialization */
 519
 520 static int __init ch7006_init(void)
 521 {
 522         return drm_i2c_encoder_register(THIS_MODULE, &ch7006_driver);
 523 }
 524
 525 static void __exit ch7006_exit(void)
 526 {
 527         drm_i2c_encoder_unregister(&ch7006_driver);
 528 }
 529
 530 int ch7006_debug;
 531 module_param_named(debug, ch7006_debug, int, 0600);
 532 MODULE_PARM_DESC(debug, "Enable debug output.");
 533
 534 char *ch7006_tv_norm;
 535 module_param_named(tv_norm, ch7006_tv_norm, charp, 0600);
 536 MODULE_PARM_DESC(tv_norm, "Default TV norm.\n"
 537                  "\t\tSupported: PAL, PAL-M, PAL-N, PAL-Nc, PAL-60, NTSC-M, NTSC-J.\n"
 538                  "\t\tDefault: PAL");
 539
 540 int ch7006_scale = 1;
 541 module_param_named(scale, ch7006_scale, int, 0600);
 542 MODULE_PARM_DESC(scale, "Default scale.\n"
 543                  "\t\tSupported: 0 -> Select video modes with a higher blanking ratio.\n"
 544                  "\t\t\t1 -> Select default video modes.\n"
 545                  "\t\t\t2 -> Select video modes with a lower blanking ratio.");
 546
 547 MODULE_AUTHOR("Francisco Jerez <currojerez@riseup.net>");
 548 MODULE_DESCRIPTION("Chrontel ch7006 TV encoder driver");
 549 MODULE_LICENSE("GPL and additional rights");
 550
 551 module_init(ch7006_init);
 552 module_exit(ch7006_exit);