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 (!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 (!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 (!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         int enc_out_index;
 231         int sd_index;
 232         int ret;
 233
 234         if (index >= cfg->num_outputs)
 235                 return -EINVAL;
 236
 237         mutex_lock(&vpbe_dev->lock);
 238
 239         sd_index = vpbe_dev->current_sd_index;
 240         enc_out_index = cfg->outputs[index].output.index;
 241         /*
 242          * Currently we switch the encoder based on output selected
 243          * by the application. If media controller is implemented later
 244          * there is will be an API added to setup_link between venc
 245          * and external encoder. So in that case below comparison always
 246          * match and encoder will not be switched. But if application
 247          * chose not to use media controller, then this provides current
 248          * way of switching encoder at the venc output.
 249          */
 250         if (strcmp(curr_enc_info->module_name,
 251                    cfg->outputs[index].subdev_name)) {
 252                 /* Need to switch the encoder at the output */
 253                 sd_index = vpbe_find_encoder_sd_index(cfg, index);
 254                 if (sd_index < 0) {
 255                         ret = -EINVAL;
 256                         goto unlock;
 257                 }
 258
 259                 ret = venc_device->setup_if_config(cfg->outputs[index].if_params);
 260                 if (ret)
 261                         goto unlock;
 262         }
 263
 264         /* Set output at the encoder */
 265         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
 266                                        s_routing, 0, enc_out_index, 0);
 267         if (ret)
 268                 goto unlock;
 269
 270         /*
 271          * It is assumed that venc or extenal encoder will set a default
 272          * mode in the sub device. For external encoder or LCD pannel output,
 273          * we also need to set up the lcd port for the required mode. So setup
 274          * the lcd port for the default mode that is configured in the board
 275          * arch/arm/mach-davinci/board-dm355-evm.setup file for the external
 276          * encoder.
 277          */
 278         ret = vpbe_get_mode_info(vpbe_dev,
 279                                  cfg->outputs[index].default_mode, index);
 280         if (!ret) {
 281                 struct osd_state *osd_device = vpbe_dev->osd_device;
 282
 283                 osd_device->ops.set_left_margin(osd_device,
 284                         vpbe_dev->current_timings.left_margin);
 285                 osd_device->ops.set_top_margin(osd_device,
 286                 vpbe_dev->current_timings.upper_margin);
 287                 vpbe_dev->current_sd_index = sd_index;
 288                 vpbe_dev->current_out_index = index;
 289         }
 290 unlock:
 291         mutex_unlock(&vpbe_dev->lock);
 292         return ret;
 293 }
 294
 295 static int vpbe_set_default_output(struct vpbe_device *vpbe_dev)
 296 {
 297         struct vpbe_config *cfg = vpbe_dev->cfg;
 298         int i;
 299
 300         for (i = 0; i < cfg->num_outputs; i++) {
 301                 if (!strcmp(def_output,
 302                             cfg->outputs[i].output.name)) {
 303                         int ret = vpbe_set_output(vpbe_dev, i);
 304
 305                         if (!ret)
 306                                 vpbe_dev->current_out_index = i;
 307                         return ret;
 308                 }
 309         }
 310         return 0;
 311 }
 312
 313 /**
 314  * vpbe_get_output - Get output
 315  * @vpbe_dev - vpbe device ptr
 316  *
 317  * return current vpbe output to the the index
 318  */
 319 static unsigned int vpbe_get_output(struct vpbe_device *vpbe_dev)
 320 {
 321         return vpbe_dev->current_out_index;
 322 }
 323
 324 /**
 325  * vpbe_s_dv_timings - Set the given preset timings in the encoder
 326  *
 327  * Sets the timings if supported by the current encoder. Return the status.
 328  * 0 - success & -EINVAL on error
 329  */
 330 static int vpbe_s_dv_timings(struct vpbe_device *vpbe_dev,
 331                     struct v4l2_dv_timings *dv_timings)
 332 {
 333         struct vpbe_config *cfg = vpbe_dev->cfg;
 334         int out_index = vpbe_dev->current_out_index;
 335         struct vpbe_output *output = &cfg->outputs[out_index];
 336         int sd_index = vpbe_dev->current_sd_index;
 337         int ret, i;
 338
 339
 340         if (!(cfg->outputs[out_index].output.capabilities &
 341             V4L2_OUT_CAP_DV_TIMINGS))
 342                 return -ENODATA;
 343
 344         for (i = 0; i < output->num_modes; i++) {
 345                 if (output->modes[i].timings_type == VPBE_ENC_DV_TIMINGS &&
 346                     !memcmp(&output->modes[i].dv_timings,
 347                                 dv_timings, sizeof(*dv_timings)))
 348                         break;
 349         }
 350         if (i >= output->num_modes)
 351                 return -EINVAL;
 352         vpbe_dev->current_timings = output->modes[i];
 353         mutex_lock(&vpbe_dev->lock);
 354
 355         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
 356                                         s_dv_timings, dv_timings);
 357         if (!ret && vpbe_dev->amp) {
 358                 /* Call amplifier subdevice */
 359                 ret = v4l2_subdev_call(vpbe_dev->amp, video,
 360                                 s_dv_timings, dv_timings);
 361         }
 362         /* set the lcd controller output for the given mode */
 363         if (!ret) {
 364                 struct osd_state *osd_device = vpbe_dev->osd_device;
 365
 366                 osd_device->ops.set_left_margin(osd_device,
 367                 vpbe_dev->current_timings.left_margin);
 368                 osd_device->ops.set_top_margin(osd_device,
 369                 vpbe_dev->current_timings.upper_margin);
 370         }
 371         mutex_unlock(&vpbe_dev->lock);
 372
 373         return ret;
 374 }
 375
 376 /**
 377  * vpbe_g_dv_timings - Get the timings in the current encoder
 378  *
 379  * Get the timings in the current encoder. Return the status. 0 - success
 380  * -EINVAL on error
 381  */
 382 static int vpbe_g_dv_timings(struct vpbe_device *vpbe_dev,
 383                      struct v4l2_dv_timings *dv_timings)
 384 {
 385         struct vpbe_config *cfg = vpbe_dev->cfg;
 386         int out_index = vpbe_dev->current_out_index;
 387
 388         if (!(cfg->outputs[out_index].output.capabilities &
 389                 V4L2_OUT_CAP_DV_TIMINGS))
 390                 return -ENODATA;
 391
 392         if (vpbe_dev->current_timings.timings_type &
 393           VPBE_ENC_DV_TIMINGS) {
 394                 *dv_timings = vpbe_dev->current_timings.dv_timings;
 395                 return 0;
 396         }
 397
 398         return -EINVAL;
 399 }
 400
 401 /**
 402  * vpbe_enum_dv_timings - Enumerate the dv timings in the current encoder
 403  *
 404  * Get the timings in the current encoder. Return the status. 0 - success
 405  * -EINVAL on error
 406  */
 407 static int vpbe_enum_dv_timings(struct vpbe_device *vpbe_dev,
 408                          struct v4l2_enum_dv_timings *timings)
 409 {
 410         struct vpbe_config *cfg = vpbe_dev->cfg;
 411         int out_index = vpbe_dev->current_out_index;
 412         struct vpbe_output *output = &cfg->outputs[out_index];
 413         int j = 0;
 414         int i;
 415
 416         if (!(output->output.capabilities & V4L2_OUT_CAP_DV_TIMINGS))
 417                 return -ENODATA;
 418
 419         for (i = 0; i < output->num_modes; i++) {
 420                 if (output->modes[i].timings_type == VPBE_ENC_DV_TIMINGS) {
 421                         if (j == timings->index)
 422                                 break;
 423                         j++;
 424                 }
 425         }
 426
 427         if (i == output->num_modes)
 428                 return -EINVAL;
 429         timings->timings = output->modes[i].dv_timings;
 430         return 0;
 431 }
 432
 433 /**
 434  * vpbe_s_std - Set the given standard in the encoder
 435  *
 436  * Sets the standard if supported by the current encoder. Return the status.
 437  * 0 - success & -EINVAL on error
 438  */
 439 static int vpbe_s_std(struct vpbe_device *vpbe_dev, v4l2_std_id std_id)
 440 {
 441         struct vpbe_config *cfg = vpbe_dev->cfg;
 442         int out_index = vpbe_dev->current_out_index;
 443         int sd_index = vpbe_dev->current_sd_index;
 444         int ret;
 445
 446         if (!(cfg->outputs[out_index].output.capabilities &
 447                 V4L2_OUT_CAP_STD))
 448                 return -ENODATA;
 449
 450         ret = vpbe_get_std_info(vpbe_dev, std_id);
 451         if (ret)
 452                 return ret;
 453
 454         mutex_lock(&vpbe_dev->lock);
 455
 456         ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video,
 457                                s_std_output, std_id);
 458         /* set the lcd controller output for the given mode */
 459         if (!ret) {
 460                 struct osd_state *osd_device = vpbe_dev->osd_device;
 461
 462                 osd_device->ops.set_left_margin(osd_device,
 463                 vpbe_dev->current_timings.left_margin);
 464                 osd_device->ops.set_top_margin(osd_device,
 465                 vpbe_dev->current_timings.upper_margin);
 466         }
 467         mutex_unlock(&vpbe_dev->lock);
 468
 469         return ret;
 470 }
 471
 472 /**
 473  * vpbe_g_std - Get the standard in the current encoder
 474  *
 475  * Get the standard in the current encoder. Return the status. 0 - success
 476  * -EINVAL on error
 477  */
 478 static int vpbe_g_std(struct vpbe_device *vpbe_dev, v4l2_std_id *std_id)
 479 {
 480         struct vpbe_enc_mode_info *cur_timings = &vpbe_dev->current_timings;
 481         struct vpbe_config *cfg = vpbe_dev->cfg;
 482         int out_index = vpbe_dev->current_out_index;
 483
 484         if (!(cfg->outputs[out_index].output.capabilities & V4L2_OUT_CAP_STD))
 485                 return -ENODATA;
 486
 487         if (cur_timings->timings_type & VPBE_ENC_STD) {
 488                 *std_id = cur_timings->std_id;
 489                 return 0;
 490         }
 491
 492         return -EINVAL;
 493 }
 494
 495 /**
 496  * vpbe_set_mode - Set mode in the current encoder using mode info
 497  *
 498  * Use the mode string to decide what timings to set in the encoder
 499  * This is typically useful when fbset command is used to change the current
 500  * timings by specifying a string to indicate the timings.
 501  */
 502 static int vpbe_set_mode(struct vpbe_device *vpbe_dev,
 503                          struct vpbe_enc_mode_info *mode_info)
 504 {
 505         struct vpbe_enc_mode_info *preset_mode = NULL;
 506         struct vpbe_config *cfg = vpbe_dev->cfg;
 507         struct v4l2_dv_timings dv_timings;
 508         struct osd_state *osd_device;
 509         int out_index = vpbe_dev->current_out_index;
 510         int i;
 511
 512         if (!mode_info || !mode_info->name)
 513                 return -EINVAL;
 514
 515         for (i = 0; i < cfg->outputs[out_index].num_modes; i++) {
 516                 if (!strcmp(mode_info->name,
 517                      cfg->outputs[out_index].modes[i].name)) {
 518                         preset_mode = &cfg->outputs[out_index].modes[i];
 519                         /*
 520                          * it may be one of the 3 timings type. Check and
 521                          * invoke right API
 522                          */
 523                         if (preset_mode->timings_type & VPBE_ENC_STD)
 524                                 return vpbe_s_std(vpbe_dev,
 525                                                  preset_mode->std_id);
 526                         if (preset_mode->timings_type &
 527                                                 VPBE_ENC_DV_TIMINGS) {
 528                                 dv_timings =
 529                                         preset_mode->dv_timings;
 530                                 return vpbe_s_dv_timings(vpbe_dev, &dv_timings);
 531                         }
 532                 }
 533         }
 534
 535         /* Only custom timing should reach here */
 536         if (!preset_mode)
 537                 return -EINVAL;
 538
 539         mutex_lock(&vpbe_dev->lock);
 540
 541         osd_device = vpbe_dev->osd_device;
 542         vpbe_dev->current_timings = *preset_mode;
 543         osd_device->ops.set_left_margin(osd_device,
 544                 vpbe_dev->current_timings.left_margin);
 545         osd_device->ops.set_top_margin(osd_device,
 546                 vpbe_dev->current_timings.upper_margin);
 547
 548         mutex_unlock(&vpbe_dev->lock);
 549         return 0;
 550 }
 551
 552 static int vpbe_set_default_mode(struct vpbe_device *vpbe_dev)
 553 {
 554         int ret;
 555
 556         ret = vpbe_get_std_info_by_name(vpbe_dev, def_mode);
 557         if (ret)
 558                 return ret;
 559
 560         /* set the default mode in the encoder */
 561         return vpbe_set_mode(vpbe_dev, &vpbe_dev->current_timings);
 562 }
 563
 564 static int platform_device_get(struct device *dev, void *data)
 565 {
 566         struct platform_device *pdev = to_platform_device(dev);
 567         struct vpbe_device *vpbe_dev = data;
 568
 569         if (strstr(pdev->name, "vpbe-osd"))
 570                 vpbe_dev->osd_device = platform_get_drvdata(pdev);
 571         if (strstr(pdev->name, "vpbe-venc"))
 572                 vpbe_dev->venc_device = dev_get_platdata(&pdev->dev);
 573
 574         return 0;
 575 }
 576
 577 /**
 578  * vpbe_initialize() - Initialize the vpbe display controller
 579  * @vpbe_dev - vpbe device ptr
 580  *
 581  * Master frame buffer device drivers calls this to initialize vpbe
 582  * display controller. This will then registers v4l2 device and the sub
 583  * devices and sets a current encoder sub device for display. v4l2 display
 584  * device driver is the master and frame buffer display device driver is
 585  * the slave. Frame buffer display driver checks the initialized during
 586  * probe and exit if not initialized. Returns status.
 587  */
 588 static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev)
 589 {
 590         struct encoder_config_info *enc_info;
 591         struct amp_config_info *amp_info;
 592         struct v4l2_subdev **enc_subdev;
 593         struct osd_state *osd_device;
 594         struct i2c_adapter *i2c_adap;
 595         int num_encoders;
 596         int ret = 0;
 597         int err;
 598         int i;
 599
 600         /*
 601          * v4l2 abd FBDev frame buffer devices will get the vpbe_dev pointer
 602          * from the platform device by iteration of platform drivers and
 603          * matching with device name
 604          */
 605         if (!vpbe_dev || !dev) {
 606                 printk(KERN_ERR "Null device pointers.\n");
 607                 return -ENODEV;
 608         }
 609
 610         if (vpbe_dev->initialized)
 611                 return 0;
 612
 613         mutex_lock(&vpbe_dev->lock);
 614
 615         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
 616                 /* We have dac clock available for platform */
 617                 vpbe_dev->dac_clk = clk_get(vpbe_dev->pdev, "vpss_dac");
 618                 if (IS_ERR(vpbe_dev->dac_clk)) {
 619                         ret =  PTR_ERR(vpbe_dev->dac_clk);
 620                         goto fail_mutex_unlock;
 621                 }
 622                 if (clk_prepare_enable(vpbe_dev->dac_clk)) {
 623                         ret =  -ENODEV;
 624                         clk_put(vpbe_dev->dac_clk);
 625                         goto fail_mutex_unlock;
 626                 }
 627         }
 628
 629         /* first enable vpss clocks */
 630         vpss_enable_clock(VPSS_VPBE_CLOCK, 1);
 631
 632         /* First register a v4l2 device */
 633         ret = v4l2_device_register(dev, &vpbe_dev->v4l2_dev);
 634         if (ret) {
 635                 v4l2_err(dev->driver,
 636                         "Unable to register v4l2 device.\n");
 637                 goto fail_clk_put;
 638         }
 639         v4l2_info(&vpbe_dev->v4l2_dev, "vpbe v4l2 device registered\n");
 640
 641         err = bus_for_each_dev(&platform_bus_type, NULL, vpbe_dev,
 642                                platform_device_get);
 643         if (err < 0) {
 644                 ret = err;
 645                 goto fail_dev_unregister;
 646         }
 647
 648         vpbe_dev->venc = venc_sub_dev_init(&vpbe_dev->v4l2_dev,
 649                                            vpbe_dev->cfg->venc.module_name);
 650         /* register venc sub device */
 651         if (!vpbe_dev->venc) {
 652                 v4l2_err(&vpbe_dev->v4l2_dev,
 653                         "vpbe unable to init venc sub device\n");
 654                 ret = -ENODEV;
 655                 goto fail_dev_unregister;
 656         }
 657         /* initialize osd device */
 658         osd_device = vpbe_dev->osd_device;
 659         if (osd_device->ops.initialize) {
 660                 err = osd_device->ops.initialize(osd_device);
 661                 if (err) {
 662                         v4l2_err(&vpbe_dev->v4l2_dev,
 663                                  "unable to initialize the OSD device");
 664                         err = -ENOMEM;
 665                         goto fail_dev_unregister;
 666                 }
 667         }
 668
 669         /*
 670          * Register any external encoders that are configured. At index 0 we
 671          * store venc sd index.
 672          */
 673         num_encoders = vpbe_dev->cfg->num_ext_encoders + 1;
 674         vpbe_dev->encoders = kmalloc_array(num_encoders,
 675                                            sizeof(*vpbe_dev->encoders),
 676                                            GFP_KERNEL);
 677         if (!vpbe_dev->encoders) {
 678                 ret = -ENOMEM;
 679                 goto fail_dev_unregister;
 680         }
 681
 682         i2c_adap = i2c_get_adapter(vpbe_dev->cfg->i2c_adapter_id);
 683         for (i = 0; i < (vpbe_dev->cfg->num_ext_encoders + 1); i++) {
 684                 if (i == 0) {
 685                         /* venc is at index 0 */
 686                         enc_subdev = &vpbe_dev->encoders[i];
 687                         *enc_subdev = vpbe_dev->venc;
 688                         continue;
 689                 }
 690                 enc_info = &vpbe_dev->cfg->ext_encoders[i];
 691                 if (enc_info->is_i2c) {
 692                         enc_subdev = &vpbe_dev->encoders[i];
 693                         *enc_subdev = v4l2_i2c_new_subdev_board(
 694                                                 &vpbe_dev->v4l2_dev, i2c_adap,
 695                                                 &enc_info->board_info, NULL);
 696                         if (*enc_subdev)
 697                                 v4l2_info(&vpbe_dev->v4l2_dev,
 698                                           "v4l2 sub device %s registered\n",
 699                                           enc_info->module_name);
 700                         else {
 701                                 v4l2_err(&vpbe_dev->v4l2_dev, "encoder %s failed to register",
 702                                          enc_info->module_name);
 703                                 ret = -ENODEV;
 704                                 goto fail_kfree_encoders;
 705                         }
 706                 } else
 707                         v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c encoders currently not supported");
 708         }
 709         /* Add amplifier subdevice for dm365 */
 710         if ((strcmp(vpbe_dev->cfg->module_name, "dm365-vpbe-display") == 0) &&
 711            vpbe_dev->cfg->amp) {
 712                 amp_info = vpbe_dev->cfg->amp;
 713                 if (amp_info->is_i2c) {
 714                         vpbe_dev->amp = v4l2_i2c_new_subdev_board(
 715                         &vpbe_dev->v4l2_dev, i2c_adap,
 716                         &amp_info->board_info, NULL);
 717                         if (!vpbe_dev->amp) {
 718                                 v4l2_err(&vpbe_dev->v4l2_dev,
 719                                          "amplifier %s failed to register",
 720                                          amp_info->module_name);
 721                                 ret = -ENODEV;
 722                                 goto fail_kfree_encoders;
 723                         }
 724                         v4l2_info(&vpbe_dev->v4l2_dev,
 725                                           "v4l2 sub device %s registered\n",
 726                                           amp_info->module_name);
 727                 } else {
 728                             vpbe_dev->amp = NULL;
 729                             v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c amplifiers currently not supported");
 730                 }
 731         } else {
 732             vpbe_dev->amp = NULL;
 733         }
 734
 735         /* set the current encoder and output to that of venc by default */
 736         vpbe_dev->current_sd_index = 0;
 737         vpbe_dev->current_out_index = 0;
 738
 739         mutex_unlock(&vpbe_dev->lock);
 740
 741         printk(KERN_NOTICE "Setting default output to %s\n", def_output);
 742         ret = vpbe_set_default_output(vpbe_dev);
 743         if (ret) {
 744                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default output %s",
 745                          def_output);
 746                 return ret;
 747         }
 748
 749         printk(KERN_NOTICE "Setting default mode to %s\n", def_mode);
 750         ret = vpbe_set_default_mode(vpbe_dev);
 751         if (ret) {
 752                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default mode %s",
 753                          def_mode);
 754                 return ret;
 755         }
 756         vpbe_dev->initialized = 1;
 757         /* TBD handling of bootargs for default output and mode */
 758         return 0;
 759
 760 fail_kfree_encoders:
 761         kfree(vpbe_dev->encoders);
 762 fail_dev_unregister:
 763         v4l2_device_unregister(&vpbe_dev->v4l2_dev);
 764 fail_clk_put:
 765         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
 766                 clk_disable_unprepare(vpbe_dev->dac_clk);
 767                 clk_put(vpbe_dev->dac_clk);
 768         }
 769 fail_mutex_unlock:
 770         mutex_unlock(&vpbe_dev->lock);
 771         return ret;
 772 }
 773
 774 /**
 775  * vpbe_deinitialize() - de-initialize the vpbe display controller
 776  * @dev - Master and slave device ptr
 777  *
 778  * vpbe_master and slave frame buffer devices calls this to de-initialize
 779  * the display controller. It is called when master and slave device
 780  * driver modules are removed and no longer requires the display controller.
 781  */
 782 static void vpbe_deinitialize(struct device *dev, struct vpbe_device *vpbe_dev)
 783 {
 784         v4l2_device_unregister(&vpbe_dev->v4l2_dev);
 785         if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
 786                 clk_disable_unprepare(vpbe_dev->dac_clk);
 787                 clk_put(vpbe_dev->dac_clk);
 788         }
 789
 790         kfree(vpbe_dev->amp);
 791         kfree(vpbe_dev->encoders);
 792         vpbe_dev->initialized = 0;
 793         /* disable vpss clocks */
 794         vpss_enable_clock(VPSS_VPBE_CLOCK, 0);
 795 }
 796
 797 static struct vpbe_device_ops vpbe_dev_ops = {
 798         .g_cropcap = vpbe_g_cropcap,
 799         .enum_outputs = vpbe_enum_outputs,
 800         .set_output = vpbe_set_output,
 801         .get_output = vpbe_get_output,
 802         .s_dv_timings = vpbe_s_dv_timings,
 803         .g_dv_timings = vpbe_g_dv_timings,
 804         .enum_dv_timings = vpbe_enum_dv_timings,
 805         .s_std = vpbe_s_std,
 806         .g_std = vpbe_g_std,
 807         .initialize = vpbe_initialize,
 808         .deinitialize = vpbe_deinitialize,
 809         .get_mode_info = vpbe_get_current_mode_info,
 810         .set_mode = vpbe_set_mode,
 811 };
 812
 813 static int vpbe_probe(struct platform_device *pdev)
 814 {
 815         struct vpbe_device *vpbe_dev;
 816         struct vpbe_config *cfg;
 817
 818         if (!pdev->dev.platform_data) {
 819                 v4l2_err(pdev->dev.driver, "No platform data\n");
 820                 return -ENODEV;
 821         }
 822         cfg = pdev->dev.platform_data;
 823
 824         if (!cfg->module_name[0] ||
 825             !cfg->osd.module_name[0] ||
 826             !cfg->venc.module_name[0]) {
 827                 v4l2_err(pdev->dev.driver, "vpbe display module names not defined\n");
 828                 return -EINVAL;
 829         }
 830
 831         vpbe_dev = kzalloc(sizeof(*vpbe_dev), GFP_KERNEL);
 832         if (!vpbe_dev)
 833                 return -ENOMEM;
 834
 835         vpbe_dev->cfg = cfg;
 836         vpbe_dev->ops = vpbe_dev_ops;
 837         vpbe_dev->pdev = &pdev->dev;
 838
 839         if (cfg->outputs->num_modes > 0)
 840                 vpbe_dev->current_timings = vpbe_dev->cfg->outputs[0].modes[0];
 841         else {
 842                 kfree(vpbe_dev);
 843                 return -ENODEV;
 844         }
 845
 846         /* set the driver data in platform device */
 847         platform_set_drvdata(pdev, vpbe_dev);
 848         mutex_init(&vpbe_dev->lock);
 849
 850         return 0;
 851 }
 852
 853 static int vpbe_remove(struct platform_device *device)
 854 {
 855         struct vpbe_device *vpbe_dev = platform_get_drvdata(device);
 856
 857         kfree(vpbe_dev);
 858
 859         return 0;
 860 }
 861
 862 static struct platform_driver vpbe_driver = {
 863         .driver = {
 864                 .name   = "vpbe_controller",
 865         },
 866         .probe = vpbe_probe,
 867         .remove = vpbe_remove,
 868 };
 869
 870 module_platform_driver(vpbe_driver);