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