drivers/media/platform/davinci/vpbe.c

   1 /*
   2  * Copyright (C) 2010 Texas Instruments Inc
   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 version 2.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  16  */
  17 #include <linux/kernel.h>
  18 #include <linux/init.h>
  19 #include <linux/module.h>
  20 #include <linux/errno.h>
  21 #include <linux/fs.h>
  22 #include <linux/string.h>
  23 #include <linux/wait.h>
  24 #include <linux/time.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/io.h>
  27 #include <linux/slab.h>
  28 #include <linux/clk.h>
  29 #include <linux/err.h>
  30
  31 #include <media/v4l2-device.h>
  32 #include <media/davinci/vpbe_types.h>
  33 #include <media/davinci/vpbe.h>
  34 #include <media/davinci/vpss.h>
  35 #include <media/davinci/vpbe_venc.h>
  36
  37 #define VPBE_DEFAULT_OUTPUT     "Composite"
  38 #define VPBE_DEFAULT_MODE       "ntsc"
  39
  40 static char *def_output = VPBE_DEFAULT_OUTPUT;
  41 static char *def_mode = VPBE_DEFAULT_MODE;
  42 static int debug;
  43
  44 module_param(def_output, charp, S_IRUGO);
  45 module_param(def_mode, charp, S_IRUGO);
  46 module_param(debug, int, 0644);
  47
  48 MODULE_PARM_DESC(def_output, "vpbe output name (default:Composite)");
  49 MODULE_PARM_DESC(def_mode, "vpbe output mode name (default:ntsc");
  50 MODULE_PARM_DESC(debug, "Debug level 0-1");
  51
  52 MODULE_DESCRIPTION("TI DMXXX VPBE Display controller");
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("Texas Instruments");
  55
  56 /**
  57  * vpbe_current_encoder_info - Get config info for current encoder
  58  * @vpbe_dev - vpbe device ptr
  59  *
  60  * Return ptr to current encoder config info
  61  */
  62 static struct encoder_config_info*
  63 vpbe_current_encoder_info(struct vpbe_device *vpbe_dev)
  64 {
  65         struct vpbe_config *cfg = vpbe_dev->cfg;
  66         int index = vpbe_dev->current_sd_index;
  67
  68         return ((index == 0) ? &cfg->venc :
  69                                 &cfg->ext_encoders[index-1]);
  70 }
  71
  72 /**
  73  * vpbe_find_encoder_sd_index - Given a name find encoder sd index
  74  *
  75  * @vpbe_config - ptr to vpbe cfg
  76  * @output_index - index used by application
  77  *
  78  * Return sd index of the encoder
  79  */
  80 static int vpbe_find_encoder_sd_index(struct vpbe_config *cfg,
  81                              int index)
  82 {
  83         char *encoder_name = cfg->outputs[index].subdev_name;
  84         int i;
  85
  86         /* Venc is always first */
  87         if (!strcmp(encoder_name, cfg->venc.module_name))
  88                 return 0;
  89
  90         for (i = 0; i < cfg->num_ext_encoders; i++) {
  91                 if (!strcmp(encoder_name,
  92                      cfg->ext_encoders[i].module_name))
  93                         return i+1;
  94         }
  95
  96         return -EINVAL;
  97 }
  98
  99 /**
 100  * vpbe_g_cropcap - Get crop capabilities of the display
 101  * @vpbe_dev - vpbe device ptr
 102  * @cropcap - cropcap is a ptr to struct v4l2_cropcap
 103  *
 104  * Update the crop capabilities in crop cap for current
 105  * mode
 106  */
 107 static int vpbe_g_cropcap(struct vpbe_device *vpbe_dev,
 108                           struct v4l2_cropcap *cropcap)
 109 {
 110         if (NULL == cropcap)
 111                 return -EINVAL;
 112         cropcap->bounds.left = 0;
 113         cropcap->bounds.top = 0;
 114         cropcap->bounds.width = vpbe_dev->current_timings.xres;
 115         cropcap->bounds.height = vpbe_dev->current_timings.yres;
 116         cropcap->defrect = cropcap->bounds;
 117
 118         return 0;
 119 }
 120
 121 /**
 122  * vpbe_enum_outputs - enumerate outputs
 123  * @vpbe_dev - vpbe device ptr
 124  * @output - ptr to v4l2_output structure
 125  *
 126  * Enumerates the outputs available at the vpbe display
 127  * returns the status, -EINVAL if end of output list
 128  */
 129 static int vpbe_enum_outputs(struct vpbe_device *vpbe_dev,
 130                              struct v4l2_output *output)
 131 {
 132         struct vpbe_config *cfg = vpbe_dev->cfg;
 133         int temp_index = output->index;
 134
 135         if (temp_index >= cfg->num_outputs)
 136                 return -EINVAL;
 137
 138         *output = cfg->outputs[temp_index].output;
 139         output->index = temp_index;
 140
 141         return 0;
 142 }
 143
 144 static int vpbe_get_mode_info(struct vpbe_device *vpbe_dev, char *mode,
 145                               int output_index)
 146 {
 147         struct vpbe_config *cfg = vpbe_dev->cfg;
 148         struct vpbe_enc_mode_info var;
 149         int curr_output = output_index;
 150         int i;
 151
 152         if (NULL == mode)
 153                 return -EINVAL;
 154
 155         for (i = 0; i < cfg->outputs[curr_output].num_modes; i++) {
 156                 var = cfg->outputs[curr_output].modes[i];
 157                 if (!strcmp(mode, var.name)) {
 158                         vpbe_dev->current_timings = var;
 159                         return 0;
 160                 }
 161         }
 162
 163         return -EINVAL;
 164 }
 165
 166 static int vpbe_get_current_mode_info(struct vpbe_device *vpbe_dev,
 167                                       struct vpbe_enc_mode_info *mode_info)
 168 {
 169         if (NULL == mode_info)
 170                 return -EINVAL;
 171
 172         *mode_info = vpbe_dev->current_timings;
 173
 174         return 0;
 175 }
 176
 177 /* Get std by std id */
 178 static int vpbe_get_std_info(struct vpbe_device *vpbe_dev,
 179                              v4l2_std_id std_id)
 180 {
 181         struct vpbe_config *cfg = vpbe_dev->cfg;
 182         struct vpbe_enc_mode_info var;
 183         int curr_output = vpbe_dev->current_out_index;
 184         int i;
 185
 186         for (i = 0; i < vpbe_dev->cfg->outputs[curr_output].num_modes; i++) {
 187                 var = cfg->outputs[curr_output].modes[i];
 188                 if ((var.timings_type & VPBE_ENC_STD) &&
 189                   (var.std_id & std_id)) {
 190                         vpbe_dev->current_timings = var;
 191                         return 0;
 192                 }
 193         }
 194
 195         return -EINVAL;
 196 }
 197
 198 static int vpbe_get_std_info_by_name(struct vpbe_device *vpbe_dev,
 199                                 char *std_name)
 200 {
 201         struct vpbe_config *cfg = vpbe_dev->cfg;
 202         struct vpbe_enc_mode_info var;
 203         int curr_output = vpbe_dev->current_out_index;
 204         int i;
 205
 206         for (i = 0; i < vpbe_dev->cfg->outputs[curr_output].num_modes; i++) {
 207                 var = cfg->outputs[curr_output].modes[i];
 208                 if (!strcmp(var.name, std_name)) {
 209                         vpbe_dev->current_timings = var;
 210                         return 0;
 211                 }
 212         }
 213
 214         return -EINVAL;
 215 }
 216
 217 /**
 218  * vpbe_set_output - Set output
 219  * @vpbe_dev - vpbe device ptr
 220  * @index - index of output
 221  *
 222  * Set vpbe output to the output specified by the index
 223  */
 224 static int vpbe_set_output(struct vpbe_device *vpbe_dev, int index)
 225 {
 226         struct encoder_config_info *curr_enc_info =
 227                         vpbe_current_encoder_info(vpbe_dev);
 228         struct vpbe_config *cfg = vpbe_dev->cfg;
 229         struct venc_platform_data *venc_device = vpbe_dev->venc_device;
 230         enum v4l2_mbus_pixelcode if_params;
 231         int enc_out_index;
 232         int sd_index;
 233         int ret = 0;
 234
 235         if (index >= cfg->num_outputs)
 236                 return -EINVAL;
 237
 238         mutex_lock(&vpbe_dev->lock);
 239
 240         sd_index = vpbe_dev->current_sd_index;
 241         enc_out_index = cfg->outputs[index].output.index;
 242         /*
 243          * Currently we switch the encoder based on output selected
 244          * by the application. If media controller is implemented later
 245          * there is will be an API added to setup_link between venc
 246          * and external encoder. So in that case below comparison always
 247          * match and encoder will not be switched. But if application
 248          * chose not to use media controller, then this provides current
 249          * way of switching encoder at the venc output.
 250          */
 251         if (strcmp(curr_enc_info->module_name,
 252                    cfg->outputs[index].subdev_name)) {
 253                 /* Need to switch the encoder at the output */
 254                 sd_index = vpbe_find_encoder_sd_index(cfg, index);
 255                 if (sd_index < 0) {
 256                         ret = -EINVAL;
 257                         goto out;
 258                 }
 259
 260                 if_params = cfg->outputs[index].if_params;
 261                 venc_device->setup_if_config(if_params);
 262                 if (ret)
 263                         goto out;
 264         }
 265
 266         /* Set output at the encoder */
 267         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
 268                                        s_routing, 0, enc_out_index, 0);
 269         if (ret)
 270                 goto out;
 271
 272         /*
 273          * It is assumed that venc or extenal encoder will set a default
 274          * mode in the sub device. For external encoder or LCD pannel output,
 275          * we also need to set up the lcd port for the required mode. So setup
 276          * the lcd port for the default mode that is configured in the board
 277          * arch/arm/mach-davinci/board-dm355-evm.setup file for the external
 278          * encoder.
 279          */
 280         ret = vpbe_get_mode_info(vpbe_dev,
 281                                  cfg->outputs[index].default_mode, index);
 282         if (!ret) {
 283                 struct osd_state *osd_device = vpbe_dev->osd_device;
 284
 285                 osd_device->ops.set_left_margin(osd_device,
 286                         vpbe_dev->current_timings.left_margin);
 287                 osd_device->ops.set_top_margin(osd_device,
 288                 vpbe_dev->current_timings.upper_margin);
 289                 vpbe_dev->current_sd_index = sd_index;
 290                 vpbe_dev->current_out_index = index;
 291         }
 292 out:
 293         mutex_unlock(&vpbe_dev->lock);
 294         return ret;
 295 }
 296
 297 static int vpbe_set_default_output(struct vpbe_device *vpbe_dev)
 298 {
 299         struct vpbe_config *cfg = vpbe_dev->cfg;
 300         int ret = 0;
 301         int i;
 302
 303         for (i = 0; i < cfg->num_outputs; i++) {
 304                 if (!strcmp(def_output,
 305                             cfg->outputs[i].output.name)) {
 306                         ret = vpbe_set_output(vpbe_dev, i);
 307                         if (!ret)
 308                                 vpbe_dev->current_out_index = i;
 309                         return ret;
 310                 }
 311         }
 312         return ret;
 313 }
 314
 315 /**
 316  * vpbe_get_output - Get output
 317  * @vpbe_dev - vpbe device ptr
 318  *
 319  * return current vpbe output to the the index
 320  */
 321 static unsigned int vpbe_get_output(struct vpbe_device *vpbe_dev)
 322 {
 323         return vpbe_dev->current_out_index;
 324 }
 325
 326 /**
 327  * vpbe_s_dv_timings - Set the given preset timings in the encoder
 328  *
 329  * Sets the timings if supported by the current encoder. Return the status.
 330  * 0 - success & -EINVAL on error
 331  */
 332 static int vpbe_s_dv_timings(struct vpbe_device *vpbe_dev,
 333                     struct v4l2_dv_timings *dv_timings)
 334 {
 335         struct vpbe_config *cfg = vpbe_dev->cfg;
 336         int out_index = vpbe_dev->current_out_index;
 337         struct vpbe_output *output = &cfg->outputs[out_index];
 338         int sd_index = vpbe_dev->current_sd_index;
 339         int ret, i;
 340
 341
 342         if (!(cfg->outputs[out_index].output.capabilities &
 343             V4L2_OUT_CAP_DV_TIMINGS))
 344                 return -EINVAL;
 345
 346         for (i = 0; i < output->num_modes; i++) {
 347                 if (output->modes[i].timings_type == VPBE_ENC_DV_TIMINGS &&
 348                     !memcmp(&output->modes[i].dv_timings,
 349                                 dv_timings, sizeof(*dv_timings)))
 350                         break;
 351         }
 352         if (i >= output->num_modes)
 353                 return -EINVAL;
 354         vpbe_dev->current_timings = output->modes[i];
 355         mutex_lock(&vpbe_dev->lock);
 356
 357         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
 358                                         s_dv_timings, dv_timings);
 359         if (!ret && (vpbe_dev->amp != NULL)) {
 360                 /* Call amplifier subdevice */
 361                 ret = v4l2_subdev_call(vpbe_dev->amp, video,
 362                                 s_dv_timings, dv_timings);
 363         }
 364         /* set the lcd controller output for the given mode */
 365         if (!ret) {
 366                 struct osd_state *osd_device = vpbe_dev->osd_device;
 367
 368                 osd_device->ops.set_left_margin(osd_device,
 369                 vpbe_dev->current_timings.left_margin);
 370                 osd_device->ops.set_top_margin(osd_device,
 371                 vpbe_dev->current_timings.upper_margin);
 372         }
 373         mutex_unlock(&vpbe_dev->lock);
 374
 375         return ret;
 376 }
 377
 378 /**
 379  * vpbe_g_dv_timings - Get the timings in the current encoder
 380  *
 381  * Get the timings in the current encoder. Return the status. 0 - success
 382  * -EINVAL on error
 383  */
 384 static int vpbe_g_dv_timings(struct vpbe_device *vpbe_dev,
 385                      struct v4l2_dv_timings *dv_timings)
 386 {
 387         if (vpbe_dev->current_timings.timings_type &
 388           VPBE_ENC_DV_TIMINGS) {
 389                 *dv_timings = vpbe_dev->current_timings.dv_timings;
 390                 return 0;
 391         }
 392
 393         return -EINVAL;
 394 }
 395
 396 /**
 397  * vpbe_enum_dv_timings - Enumerate the dv timings in the current encoder
 398  *
 399  * Get the timings in the current encoder. Return the status. 0 - success
 400  * -EINVAL on error
 401  */
 402 static int vpbe_enum_dv_timings(struct vpbe_device *vpbe_dev,
 403                          struct v4l2_enum_dv_timings *timings)
 404 {
 405         struct vpbe_config *cfg = vpbe_dev->cfg;
 406         int out_index = vpbe_dev->current_out_index;
 407         struct vpbe_output *output = &cfg->outputs[out_index];
 408         int j = 0;
 409         int i;
 410
 411         if (!(output->output.capabilities & V4L2_OUT_CAP_DV_TIMINGS))
 412                 return -EINVAL;
 413
 414         for (i = 0; i < output->num_modes; i++) {
 415                 if (output->modes[i].timings_type == VPBE_ENC_DV_TIMINGS) {
 416                         if (j == timings->index)
 417                                 break;
 418                         j++;
 419                 }
 420         }
 421
 422         if (i == output->num_modes)
 423                 return -EINVAL;
 424         timings->timings = output->modes[i].dv_timings;
 425         return 0;
 426 }
 427
 428 /**
 429  * vpbe_s_std - Set the given standard in the encoder
 430  *
 431  * Sets the standard if supported by the current encoder. Return the status.
 432  * 0 - success & -EINVAL on error
 433  */
 434 static int vpbe_s_std(struct vpbe_device *vpbe_dev, v4l2_std_id std_id)
 435 {
 436         struct vpbe_config *cfg = vpbe_dev->cfg;
 437         int out_index = vpbe_dev->current_out_index;
 438         int sd_index = vpbe_dev->current_sd_index;
 439         int ret;
 440
 441         if (!(cfg->outputs[out_index].output.capabilities &
 442                 V4L2_OUT_CAP_STD))
 443                 return -EINVAL;
 444
 445         ret = vpbe_get_std_info(vpbe_dev, std_id);
 446         if (ret)
 447                 return ret;
 448
 449         mutex_lock(&vpbe_dev->lock);
 450
 451         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
 452                                s_std_output, std_id);
 453         /* set the lcd controller output for the given mode */
 454         if (!ret) {
 455                 struct osd_state *osd_device = vpbe_dev->osd_device;
 456
 457                 osd_device->ops.set_left_margin(osd_device,
 458                 vpbe_dev->current_timings.left_margin);
 459                 osd_device->ops.set_top_margin(osd_device,
 460                 vpbe_dev->current_timings.upper_margin);
 461         }
 462         mutex_unlock(&vpbe_dev->lock);
 463
 464         return ret;
 465 }
 466
 467 /**
 468  * vpbe_g_std - Get the standard in the current encoder
 469  *
 470  * Get the standard in the current encoder. Return the status. 0 - success
 471  * -EINVAL on error
 472  */
 473 static int vpbe_g_std(struct vpbe_device *vpbe_dev, v4l2_std_id *std_id)
 474 {
 475         struct vpbe_enc_mode_info *cur_timings = &vpbe_dev->current_timings;
 476
 477         if (cur_timings->timings_type & VPBE_ENC_STD) {
 478                 *std_id = cur_timings->std_id;
 479                 return 0;
 480         }
 481
 482         return -EINVAL;
 483 }
 484
 485 /**
 486  * vpbe_set_mode - Set mode in the current encoder using mode info
 487  *
 488  * Use the mode string to decide what timings to set in the encoder
 489  * This is typically useful when fbset command is used to change the current
 490  * timings by specifying a string to indicate the timings.
 491  */
 492 static int vpbe_set_mode(struct vpbe_device *vpbe_dev,
 493                          struct vpbe_enc_mode_info *mode_info)
 494 {
 495         struct vpbe_enc_mode_info *preset_mode = NULL;
 496         struct vpbe_config *cfg = vpbe_dev->cfg;
 497         struct v4l2_dv_timings dv_timings;
 498         struct osd_state *osd_device;
 499         int out_index = vpbe_dev->current_out_index;
 500         int ret = 0;
 501         int i;
 502
 503         if ((NULL == mode_info) || (NULL == mode_info->name))
 504                 return -EINVAL;
 505
 506         for (i = 0; i < cfg->outputs[out_index].num_modes; i++) {
 507                 if (!strcmp(mode_info->name,
 508                      cfg->outputs[out_index].modes[i].name)) {
 509                         preset_mode = &cfg->outputs[out_index].modes[i];
 510                         /*
 511                          * it may be one of the 3 timings type. Check and
 512                          * invoke right API
 513                          */
 514                         if (preset_mode->timings_type & VPBE_ENC_STD)
 515                                 return vpbe_s_std(vpbe_dev,
 516                                                  preset_mode->std_id);
 517                         if (preset_mode->timings_type &
 518                                                 VPBE_ENC_DV_TIMINGS) {
 519                                 dv_timings =
 520                                         preset_mode->dv_timings;
 521                                 return vpbe_s_dv_timings(vpbe_dev, &dv_timings);
 522                         }
 523                 }
 524         }
 525
 526         /* Only custom timing should reach here */
 527         if (preset_mode == NULL)
 528                 return -EINVAL;
 529
 530         mutex_lock(&vpbe_dev->lock);
 531
 532         osd_device = vpbe_dev->osd_device;
 533         vpbe_dev->current_timings = *preset_mode;
 534         osd_device->ops.set_left_margin(osd_device,
 535                 vpbe_dev->current_timings.left_margin);
 536         osd_device->ops.set_top_margin(osd_device,
 537                 vpbe_dev->current_timings.upper_margin);
 538
 539         mutex_unlock(&vpbe_dev->lock);
 540
 541         return ret;
 542 }
 543
 544 static int vpbe_set_default_mode(struct vpbe_device *vpbe_dev)
 545 {
 546         int ret;
 547
 548         ret = vpbe_get_std_info_by_name(vpbe_dev, def_mode);
 549         if (ret)
 550                 return ret;
 551
 552         /* set the default mode in the encoder */
 553         return vpbe_set_mode(vpbe_dev, &vpbe_dev->current_timings);
 554 }
 555
 556 static int platform_device_get(struct device *dev, void *data)
 557 {
 558         struct platform_device *pdev = to_platform_device(dev);
 559         struct vpbe_device *vpbe_dev = data;
 560
 561         if (strstr(pdev->name, "vpbe-osd") != NULL)
 562                 vpbe_dev->osd_device = platform_get_drvdata(pdev);
 563         if (strstr(pdev->name, "vpbe-venc") != NULL)
 564                 vpbe_dev->venc_device = dev_get_platdata(&pdev->dev);
 565
 566         return 0;
 567 }
 568
 569 /**
 570  * vpbe_initialize() - Initialize the vpbe display controller
 571  * @vpbe_dev - vpbe device ptr
 572  *
 573  * Master frame buffer device drivers calls this to initialize vpbe
 574  * display controller. This will then registers v4l2 device and the sub
 575  * devices and sets a current encoder sub device for display. v4l2 display
 576  * device driver is the master and frame buffer display device driver is
 577  * the slave. Frame buffer display driver checks the initialized during
 578  * probe and exit if not initialized. Returns status.
 579  */
 580 static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev)
 581 {
 582         struct encoder_config_info *enc_info;
 583         struct amp_config_info *amp_info;
 584         struct v4l2_subdev **enc_subdev;
 585         struct osd_state *osd_device;
 586         struct i2c_adapter *i2c_adap;
 587         int num_encoders;
 588         int ret = 0;
 589         int err;
 590         int i;
 591
 592         /*
 593          * v4l2 abd FBDev frame buffer devices will get the vpbe_dev pointer
 594          * from the platform device by iteration of platform drivers and
 595          * matching with device name
 596          */
 597         if (NULL == vpbe_dev || NULL == dev) {
 598                 printk(KERN_ERR "Null device pointers.\n");
 599                 return -ENODEV;
 600         }
 601
 602         if (vpbe_dev->initialized)
 603                 return 0;
 604
 605         mutex_lock(&vpbe_dev->lock);
 606
 607         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
 608                 /* We have dac clock available for platform */
 609                 vpbe_dev->dac_clk = clk_get(vpbe_dev->pdev, "vpss_dac");
 610                 if (IS_ERR(vpbe_dev->dac_clk)) {
 611                         ret =  PTR_ERR(vpbe_dev->dac_clk);
 612                         goto fail_mutex_unlock;
 613                 }
 614                 if (clk_prepare_enable(vpbe_dev->dac_clk)) {
 615                         ret =  -ENODEV;
 616                         goto fail_mutex_unlock;
 617                 }
 618         }
 619
 620         /* first enable vpss clocks */
 621         vpss_enable_clock(VPSS_VPBE_CLOCK, 1);
 622
 623         /* First register a v4l2 device */
 624         ret = v4l2_device_register(dev, &vpbe_dev->v4l2_dev);
 625         if (ret) {
 626                 v4l2_err(dev->driver,
 627                         "Unable to register v4l2 device.\n");
 628                 goto fail_clk_put;
 629         }
 630         v4l2_info(&vpbe_dev->v4l2_dev, "vpbe v4l2 device registered\n");
 631
 632         err = bus_for_each_dev(&platform_bus_type, NULL, vpbe_dev,
 633                                platform_device_get);
 634         if (err < 0) {
 635                 ret = err;
 636                 goto fail_dev_unregister;
 637         }
 638
 639         vpbe_dev->venc = venc_sub_dev_init(&vpbe_dev->v4l2_dev,
 640                                            vpbe_dev->cfg->venc.module_name);
 641         /* register venc sub device */
 642         if (vpbe_dev->venc == NULL) {
 643                 v4l2_err(&vpbe_dev->v4l2_dev,
 644                         "vpbe unable to init venc sub device\n");
 645                 ret = -ENODEV;
 646                 goto fail_dev_unregister;
 647         }
 648         /* initialize osd device */
 649         osd_device = vpbe_dev->osd_device;
 650
 651         if (NULL != osd_device->ops.initialize) {
 652                 err = osd_device->ops.initialize(osd_device);
 653                 if (err) {
 654                         v4l2_err(&vpbe_dev->v4l2_dev,
 655                                  "unable to initialize the OSD device");
 656                         err = -ENOMEM;
 657                         goto fail_dev_unregister;
 658                 }
 659         }
 660
 661         /*
 662          * Register any external encoders that are configured. At index 0 we
 663          * store venc sd index.
 664          */
 665         num_encoders = vpbe_dev->cfg->num_ext_encoders + 1;
 666         vpbe_dev->encoders = kmalloc(
 667                                 sizeof(struct v4l2_subdev *)*num_encoders,
 668                                 GFP_KERNEL);
 669         if (NULL == vpbe_dev->encoders) {
 670                 v4l2_err(&vpbe_dev->v4l2_dev,
 671                         "unable to allocate memory for encoders sub devices");
 672                 ret = -ENOMEM;
 673                 goto fail_dev_unregister;
 674         }
 675
 676         i2c_adap = i2c_get_adapter(vpbe_dev->cfg->i2c_adapter_id);
 677         for (i = 0; i < (vpbe_dev->cfg->num_ext_encoders + 1); i++) {
 678                 if (i == 0) {
 679                         /* venc is at index 0 */
 680                         enc_subdev = &vpbe_dev->encoders[i];
 681                         *enc_subdev = vpbe_dev->venc;
 682                         continue;
 683                 }
 684                 enc_info = &vpbe_dev->cfg->ext_encoders[i];
 685                 if (enc_info->is_i2c) {
 686                         enc_subdev = &vpbe_dev->encoders[i];
 687                         *enc_subdev = v4l2_i2c_new_subdev_board(
 688                                                 &vpbe_dev->v4l2_dev, i2c_adap,
 689                                                 &enc_info->board_info, NULL);
 690                         if (*enc_subdev)
 691                                 v4l2_info(&vpbe_dev->v4l2_dev,
 692                                           "v4l2 sub device %s registered\n",
 693                                           enc_info->module_name);
 694                         else {
 695                                 v4l2_err(&vpbe_dev->v4l2_dev, "encoder %s"
 696                                          " failed to register",
 697                                          enc_info->module_name);
 698                                 ret = -ENODEV;
 699                                 goto fail_kfree_encoders;
 700                         }
 701                 } else
 702                         v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c encoders"
 703                                  " currently not supported");
 704         }
 705         /* Add amplifier subdevice for dm365 */
 706         if ((strcmp(vpbe_dev->cfg->module_name, "dm365-vpbe-display") == 0) &&
 707                         vpbe_dev->cfg->amp != NULL) {
 708                 amp_info = vpbe_dev->cfg->amp;
 709                 if (amp_info->is_i2c) {
 710                         vpbe_dev->amp = v4l2_i2c_new_subdev_board(
 711                         &vpbe_dev->v4l2_dev, i2c_adap,
 712                         &amp_info->board_info, NULL);
 713                         if (!vpbe_dev->amp) {
 714                                 v4l2_err(&vpbe_dev->v4l2_dev,
 715                                          "amplifier %s failed to register",
 716                                          amp_info->module_name);
 717                                 ret = -ENODEV;
 718                                 goto fail_kfree_encoders;
 719                         }
 720                         v4l2_info(&vpbe_dev->v4l2_dev,
 721                                           "v4l2 sub device %s registered\n",
 722                                           amp_info->module_name);
 723                 } else {
 724                             vpbe_dev->amp = NULL;
 725                             v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c amplifiers"
 726                             " currently not supported");
 727                 }
 728         } else {
 729             vpbe_dev->amp = NULL;
 730         }
 731
 732         /* set the current encoder and output to that of venc by default */
 733         vpbe_dev->current_sd_index = 0;
 734         vpbe_dev->current_out_index = 0;
 735
 736         mutex_unlock(&vpbe_dev->lock);
 737
 738         printk(KERN_NOTICE "Setting default output to %s\n", def_output);
 739         ret = vpbe_set_default_output(vpbe_dev);
 740         if (ret) {
 741                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default output %s",
 742                          def_output);
 743                 return ret;
 744         }
 745
 746         printk(KERN_NOTICE "Setting default mode to %s\n", def_mode);
 747         ret = vpbe_set_default_mode(vpbe_dev);
 748         if (ret) {
 749                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default mode %s",
 750                          def_mode);
 751                 return ret;
 752         }
 753         vpbe_dev->initialized = 1;
 754         /* TBD handling of bootargs for default output and mode */
 755         return 0;
 756
 757 fail_kfree_encoders:
 758         kfree(vpbe_dev->encoders);
 759 fail_dev_unregister:
 760         v4l2_device_unregister(&vpbe_dev->v4l2_dev);
 761 fail_clk_put:
 762         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
 763                 clk_disable_unprepare(vpbe_dev->dac_clk);
 764                 clk_put(vpbe_dev->dac_clk);
 765         }
 766 fail_mutex_unlock:
 767         mutex_unlock(&vpbe_dev->lock);
 768         return ret;
 769 }
 770
 771 /**
 772  * vpbe_deinitialize() - de-initialize the vpbe display controller
 773  * @dev - Master and slave device ptr
 774  *
 775  * vpbe_master and slave frame buffer devices calls this to de-initialize
 776  * the display controller. It is called when master and slave device
 777  * driver modules are removed and no longer requires the display controller.
 778  */
 779 static void vpbe_deinitialize(struct device *dev, struct vpbe_device *vpbe_dev)
 780 {
 781         v4l2_device_unregister(&vpbe_dev->v4l2_dev);
 782         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
 783                 clk_disable_unprepare(vpbe_dev->dac_clk);
 784                 clk_put(vpbe_dev->dac_clk);
 785         }
 786
 787         kfree(vpbe_dev->amp);
 788         kfree(vpbe_dev->encoders);
 789         vpbe_dev->initialized = 0;
 790         /* disable vpss clocks */
 791         vpss_enable_clock(VPSS_VPBE_CLOCK, 0);
 792 }
 793
 794 static struct vpbe_device_ops vpbe_dev_ops = {
 795         .g_cropcap = vpbe_g_cropcap,
 796         .enum_outputs = vpbe_enum_outputs,
 797         .set_output = vpbe_set_output,
 798         .get_output = vpbe_get_output,
 799         .s_dv_timings = vpbe_s_dv_timings,
 800         .g_dv_timings = vpbe_g_dv_timings,
 801         .enum_dv_timings = vpbe_enum_dv_timings,
 802         .s_std = vpbe_s_std,
 803         .g_std = vpbe_g_std,
 804         .initialize = vpbe_initialize,
 805         .deinitialize = vpbe_deinitialize,
 806         .get_mode_info = vpbe_get_current_mode_info,
 807         .set_mode = vpbe_set_mode,
 808 };
 809
 810 static int vpbe_probe(struct platform_device *pdev)
 811 {
 812         struct vpbe_device *vpbe_dev;
 813         struct vpbe_config *cfg;
 814         int ret = -EINVAL;
 815
 816         if (pdev->dev.platform_data == NULL) {
 817                 v4l2_err(pdev->dev.driver, "No platform data\n");
 818                 return -ENODEV;
 819         }
 820         cfg = pdev->dev.platform_data;
 821
 822         if (!cfg->module_name[0] ||
 823             !cfg->osd.module_name[0] ||
 824             !cfg->venc.module_name[0]) {
 825                 v4l2_err(pdev->dev.driver, "vpbe display module names not"
 826                          " defined\n");
 827                 return ret;
 828         }
 829
 830         vpbe_dev = kzalloc(sizeof(*vpbe_dev), GFP_KERNEL);
 831         if (vpbe_dev == NULL) {
 832                 v4l2_err(pdev->dev.driver, "Unable to allocate memory"
 833                          " for vpbe_device\n");
 834                 return -ENOMEM;
 835         }
 836         vpbe_dev->cfg = cfg;
 837         vpbe_dev->ops = vpbe_dev_ops;
 838         vpbe_dev->pdev = &pdev->dev;
 839
 840         if (cfg->outputs->num_modes > 0)
 841                 vpbe_dev->current_timings = vpbe_dev->cfg->outputs[0].modes[0];
 842         else {
 843                 kfree(vpbe_dev);
 844                 return -ENODEV;
 845         }
 846
 847         /* set the driver data in platform device */
 848         platform_set_drvdata(pdev, vpbe_dev);
 849         mutex_init(&vpbe_dev->lock);
 850
 851         return 0;
 852 }
 853
 854 static int vpbe_remove(struct platform_device *device)
 855 {
 856         struct vpbe_device *vpbe_dev = platform_get_drvdata(device);
 857
 858         kfree(vpbe_dev);
 859
 860         return 0;
 861 }
 862
 863 static struct platform_driver vpbe_driver = {
 864         .driver = {
 865                 .name   = "vpbe_controller",
 866                 .owner  = THIS_MODULE,
 867         },
 868         .probe = vpbe_probe,
 869         .remove = vpbe_remove,
 870 };
 871
 872 module_platform_driver(vpbe_driver);