drivers/media/platform/davinci/vpif_display.c

   1 /*
   2  * vpif-display - VPIF display driver
   3  * Display driver for TI DaVinci VPIF
   4  *
   5  * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation version 2.
  10  *
  11  * This program is distributed .as is. WITHOUT ANY WARRANTY of any
  12  * kind, whether express or implied; without even the implied warranty
  13  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/interrupt.h>
  18 #include <linux/module.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/slab.h>
  21
  22 #include <media/v4l2-ioctl.h>
  23
  24 #include "vpif.h"
  25 #include "vpif_display.h"
  26
  27 MODULE_DESCRIPTION("TI DaVinci VPIF Display driver");
  28 MODULE_LICENSE("GPL");
  29 MODULE_VERSION(VPIF_DISPLAY_VERSION);
  30
  31 #define VPIF_V4L2_STD (V4L2_STD_525_60 | V4L2_STD_625_50)
  32
  33 #define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
  34 #define vpif_dbg(level, debug, fmt, arg...)     \
  35                 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
  36
  37 static int debug = 1;
  38 static u32 ch2_numbuffers = 3;
  39 static u32 ch3_numbuffers = 3;
  40 static u32 ch2_bufsize = 1920 * 1080 * 2;
  41 static u32 ch3_bufsize = 720 * 576 * 2;
  42
  43 module_param(debug, int, 0644);
  44 module_param(ch2_numbuffers, uint, S_IRUGO);
  45 module_param(ch3_numbuffers, uint, S_IRUGO);
  46 module_param(ch2_bufsize, uint, S_IRUGO);
  47 module_param(ch3_bufsize, uint, S_IRUGO);
  48
  49 MODULE_PARM_DESC(debug, "Debug level 0-1");
  50 MODULE_PARM_DESC(ch2_numbuffers, "Channel2 buffer count (default:3)");
  51 MODULE_PARM_DESC(ch3_numbuffers, "Channel3 buffer count (default:3)");
  52 MODULE_PARM_DESC(ch2_bufsize, "Channel2 buffer size (default:1920 x 1080 x 2)");
  53 MODULE_PARM_DESC(ch3_bufsize, "Channel3 buffer size (default:720 x 576 x 2)");
  54
  55 static struct vpif_config_params config_params = {
  56         .min_numbuffers         = 3,
  57         .numbuffers[0]          = 3,
  58         .numbuffers[1]          = 3,
  59         .min_bufsize[0]         = 720 * 480 * 2,
  60         .min_bufsize[1]         = 720 * 480 * 2,
  61         .channel_bufsize[0]     = 1920 * 1080 * 2,
  62         .channel_bufsize[1]     = 720 * 576 * 2,
  63 };
  64
  65 static struct vpif_device vpif_obj = { {NULL} };
  66 static struct device *vpif_dev;
  67 static void vpif_calculate_offsets(struct channel_obj *ch);
  68 static void vpif_config_addr(struct channel_obj *ch, int muxmode);
  69
  70 /*
  71  * buffer_prepare: This is the callback function called from vb2_qbuf()
  72  * function the buffer is prepared and user space virtual address is converted
  73  * into physical address
  74  */
  75 static int vpif_buffer_prepare(struct vb2_buffer *vb)
  76 {
  77         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
  78         struct vb2_queue *q = vb->vb2_queue;
  79         struct common_obj *common;
  80         unsigned long addr;
  81
  82         common = &fh->channel->common[VPIF_VIDEO_INDEX];
  83         if (vb->state != VB2_BUF_STATE_ACTIVE &&
  84                 vb->state != VB2_BUF_STATE_PREPARED) {
  85                 vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
  86                 if (vb2_plane_vaddr(vb, 0) &&
  87                 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
  88                         goto buf_align_exit;
  89
  90                 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
  91                 if (q->streaming &&
  92                         (V4L2_BUF_TYPE_SLICED_VBI_OUTPUT != q->type)) {
  93                         if (!ISALIGNED(addr + common->ytop_off) ||
  94                         !ISALIGNED(addr + common->ybtm_off) ||
  95                         !ISALIGNED(addr + common->ctop_off) ||
  96                         !ISALIGNED(addr + common->cbtm_off))
  97                                 goto buf_align_exit;
  98                 }
  99         }
 100         return 0;
 101
 102 buf_align_exit:
 103         vpif_err("buffer offset not aligned to 8 bytes\n");
 104         return -EINVAL;
 105 }
 106
 107 /*
 108  * vpif_buffer_queue_setup: This function allocates memory for the buffers
 109  */
 110 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 111                                 const struct v4l2_format *fmt,
 112                                 unsigned int *nbuffers, unsigned int *nplanes,
 113                                 unsigned int sizes[], void *alloc_ctxs[])
 114 {
 115         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 116         struct channel_obj *ch = fh->channel;
 117         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 118         unsigned long size;
 119
 120         if (V4L2_MEMORY_MMAP == common->memory) {
 121                 size = config_params.channel_bufsize[ch->channel_id];
 122                 /*
 123                 * Checking if the buffer size exceeds the available buffer
 124                 * ycmux_mode = 0 means 1 channel mode HD and
 125                 * ycmux_mode = 1 means 2 channels mode SD
 126                 */
 127                 if (ch->vpifparams.std_info.ycmux_mode == 0) {
 128                         if (config_params.video_limit[ch->channel_id])
 129                                 while (size * *nbuffers >
 130                                         (config_params.video_limit[0]
 131                                                 + config_params.video_limit[1]))
 132                                         (*nbuffers)--;
 133                 } else {
 134                         if (config_params.video_limit[ch->channel_id])
 135                                 while (size * *nbuffers >
 136                                 config_params.video_limit[ch->channel_id])
 137                                         (*nbuffers)--;
 138                 }
 139         } else {
 140                 size = common->fmt.fmt.pix.sizeimage;
 141         }
 142
 143         if (*nbuffers < config_params.min_numbuffers)
 144                         *nbuffers = config_params.min_numbuffers;
 145
 146         *nplanes = 1;
 147         sizes[0] = size;
 148         alloc_ctxs[0] = common->alloc_ctx;
 149         return 0;
 150 }
 151
 152 /*
 153  * vpif_buffer_queue: This function adds the buffer to DMA queue
 154  */
 155 static void vpif_buffer_queue(struct vb2_buffer *vb)
 156 {
 157         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 158         struct vpif_disp_buffer *buf = container_of(vb,
 159                                 struct vpif_disp_buffer, vb);
 160         struct channel_obj *ch = fh->channel;
 161         struct common_obj *common;
 162         unsigned long flags;
 163
 164         common = &ch->common[VPIF_VIDEO_INDEX];
 165
 166         /* add the buffer to the DMA queue */
 167         spin_lock_irqsave(&common->irqlock, flags);
 168         list_add_tail(&buf->list, &common->dma_queue);
 169         spin_unlock_irqrestore(&common->irqlock, flags);
 170 }
 171
 172 /*
 173  * vpif_buf_cleanup: This function is called from the videobuf2 layer to
 174  * free memory allocated to the buffers
 175  */
 176 static void vpif_buf_cleanup(struct vb2_buffer *vb)
 177 {
 178         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 179         struct vpif_disp_buffer *buf = container_of(vb,
 180                                         struct vpif_disp_buffer, vb);
 181         struct channel_obj *ch = fh->channel;
 182         struct common_obj *common;
 183         unsigned long flags;
 184
 185         common = &ch->common[VPIF_VIDEO_INDEX];
 186
 187         spin_lock_irqsave(&common->irqlock, flags);
 188         if (vb->state == VB2_BUF_STATE_ACTIVE)
 189                 list_del_init(&buf->list);
 190         spin_unlock_irqrestore(&common->irqlock, flags);
 191 }
 192
 193 static void vpif_wait_prepare(struct vb2_queue *vq)
 194 {
 195         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 196         struct channel_obj *ch = fh->channel;
 197         struct common_obj *common;
 198
 199         common = &ch->common[VPIF_VIDEO_INDEX];
 200         mutex_unlock(&common->lock);
 201 }
 202
 203 static void vpif_wait_finish(struct vb2_queue *vq)
 204 {
 205         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 206         struct channel_obj *ch = fh->channel;
 207         struct common_obj *common;
 208
 209         common = &ch->common[VPIF_VIDEO_INDEX];
 210         mutex_lock(&common->lock);
 211 }
 212
 213 static int vpif_buffer_init(struct vb2_buffer *vb)
 214 {
 215         struct vpif_disp_buffer *buf = container_of(vb,
 216                                         struct vpif_disp_buffer, vb);
 217
 218         INIT_LIST_HEAD(&buf->list);
 219
 220         return 0;
 221 }
 222
 223 static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
 224
 225 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 226 {
 227         struct vpif_display_config *vpif_config_data =
 228                                         vpif_dev->platform_data;
 229         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 230         struct channel_obj *ch = fh->channel;
 231         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 232         struct vpif_params *vpif = &ch->vpifparams;
 233         unsigned long addr = 0;
 234         unsigned long flags;
 235         int ret;
 236
 237         spin_lock_irqsave(&common->irqlock, flags);
 238
 239         /* Get the next frame from the buffer queue */
 240         common->next_frm = common->cur_frm =
 241                             list_entry(common->dma_queue.next,
 242                                        struct vpif_disp_buffer, list);
 243
 244         list_del(&common->cur_frm->list);
 245         spin_unlock_irqrestore(&common->irqlock, flags);
 246         /* Mark state of the current frame to active */
 247         common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 248
 249         /* Initialize field_id and started member */
 250         ch->field_id = 0;
 251         common->started = 1;
 252         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
 253         /* Calculate the offset for Y and C data  in the buffer */
 254         vpif_calculate_offsets(ch);
 255
 256         if ((ch->vpifparams.std_info.frm_fmt &&
 257                 ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE)
 258                 && (common->fmt.fmt.pix.field != V4L2_FIELD_ANY)))
 259                 || (!ch->vpifparams.std_info.frm_fmt
 260                 && (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
 261                 vpif_err("conflict in field format and std format\n");
 262                 return -EINVAL;
 263         }
 264
 265         /* clock settings */
 266         if (vpif_config_data->set_clock) {
 267                 ret = vpif_config_data->set_clock(ch->vpifparams.std_info.
 268                 ycmux_mode, ch->vpifparams.std_info.hd_sd);
 269                 if (ret < 0) {
 270                         vpif_err("can't set clock\n");
 271                         return ret;
 272                 }
 273         }
 274
 275         /* set the parameters and addresses */
 276         ret = vpif_set_video_params(vpif, ch->channel_id + 2);
 277         if (ret < 0)
 278                 return ret;
 279
 280         common->started = ret;
 281         vpif_config_addr(ch, ret);
 282         common->set_addr((addr + common->ytop_off),
 283                             (addr + common->ybtm_off),
 284                             (addr + common->ctop_off),
 285                             (addr + common->cbtm_off));
 286
 287         /* Set interrupt for both the fields in VPIF
 288             Register enable channel in VPIF register */
 289         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
 290         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 291                 channel2_intr_assert();
 292                 channel2_intr_enable(1);
 293                 enable_channel2(1);
 294                 if (vpif_config_data->chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
 295                         channel2_clipping_enable(1);
 296         }
 297
 298         if ((VPIF_CHANNEL3_VIDEO == ch->channel_id)
 299                 || (common->started == 2)) {
 300                 channel3_intr_assert();
 301                 channel3_intr_enable(1);
 302                 enable_channel3(1);
 303                 if (vpif_config_data->chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
 304                         channel3_clipping_enable(1);
 305         }
 306
 307         return 0;
 308 }
 309
 310 /* abort streaming and wait for last buffer */
 311 static int vpif_stop_streaming(struct vb2_queue *vq)
 312 {
 313         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 314         struct channel_obj *ch = fh->channel;
 315         struct common_obj *common;
 316         unsigned long flags;
 317
 318         if (!vb2_is_streaming(vq))
 319                 return 0;
 320
 321         common = &ch->common[VPIF_VIDEO_INDEX];
 322
 323         /* Disable channel */
 324         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 325                 enable_channel2(0);
 326                 channel2_intr_enable(0);
 327         }
 328         if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
 329                 (2 == common->started)) {
 330                 enable_channel3(0);
 331                 channel3_intr_enable(0);
 332         }
 333         common->started = 0;
 334
 335         /* release all active buffers */
 336         spin_lock_irqsave(&common->irqlock, flags);
 337         if (common->cur_frm == common->next_frm) {
 338                 vb2_buffer_done(&common->cur_frm->vb, VB2_BUF_STATE_ERROR);
 339         } else {
 340                 if (common->cur_frm != NULL)
 341                         vb2_buffer_done(&common->cur_frm->vb,
 342                                         VB2_BUF_STATE_ERROR);
 343                 if (common->next_frm != NULL)
 344                         vb2_buffer_done(&common->next_frm->vb,
 345                                         VB2_BUF_STATE_ERROR);
 346         }
 347
 348         while (!list_empty(&common->dma_queue)) {
 349                 common->next_frm = list_entry(common->dma_queue.next,
 350                                                 struct vpif_disp_buffer, list);
 351                 list_del(&common->next_frm->list);
 352                 vb2_buffer_done(&common->next_frm->vb, VB2_BUF_STATE_ERROR);
 353         }
 354         spin_unlock_irqrestore(&common->irqlock, flags);
 355
 356         return 0;
 357 }
 358
 359 static struct vb2_ops video_qops = {
 360         .queue_setup            = vpif_buffer_queue_setup,
 361         .wait_prepare           = vpif_wait_prepare,
 362         .wait_finish            = vpif_wait_finish,
 363         .buf_init               = vpif_buffer_init,
 364         .buf_prepare            = vpif_buffer_prepare,
 365         .start_streaming        = vpif_start_streaming,
 366         .stop_streaming         = vpif_stop_streaming,
 367         .buf_cleanup            = vpif_buf_cleanup,
 368         .buf_queue              = vpif_buffer_queue,
 369 };
 370
 371 static void process_progressive_mode(struct common_obj *common)
 372 {
 373         unsigned long addr = 0;
 374
 375         spin_lock(&common->irqlock);
 376         /* Get the next buffer from buffer queue */
 377         common->next_frm = list_entry(common->dma_queue.next,
 378                                 struct vpif_disp_buffer, list);
 379         /* Remove that buffer from the buffer queue */
 380         list_del(&common->next_frm->list);
 381         spin_unlock(&common->irqlock);
 382         /* Mark status of the buffer as active */
 383         common->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 384
 385         /* Set top and bottom field addrs in VPIF registers */
 386         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb, 0);
 387         common->set_addr(addr + common->ytop_off,
 388                                  addr + common->ybtm_off,
 389                                  addr + common->ctop_off,
 390                                  addr + common->cbtm_off);
 391 }
 392
 393 static void process_interlaced_mode(int fid, struct common_obj *common)
 394 {
 395         /* device field id and local field id are in sync */
 396         /* If this is even field */
 397         if (0 == fid) {
 398                 if (common->cur_frm == common->next_frm)
 399                         return;
 400
 401                 /* one frame is displayed If next frame is
 402                  *  available, release cur_frm and move on */
 403                 /* Copy frame display time */
 404                 v4l2_get_timestamp(&common->cur_frm->vb.v4l2_buf.timestamp);
 405                 /* Change status of the cur_frm */
 406                 vb2_buffer_done(&common->cur_frm->vb,
 407                                             VB2_BUF_STATE_DONE);
 408                 /* Make cur_frm pointing to next_frm */
 409                 common->cur_frm = common->next_frm;
 410
 411         } else if (1 == fid) {  /* odd field */
 412                 spin_lock(&common->irqlock);
 413                 if (list_empty(&common->dma_queue)
 414                     || (common->cur_frm != common->next_frm)) {
 415                         spin_unlock(&common->irqlock);
 416                         return;
 417                 }
 418                 spin_unlock(&common->irqlock);
 419                 /* one field is displayed configure the next
 420                  * frame if it is available else hold on current
 421                  * frame */
 422                 /* Get next from the buffer queue */
 423                 process_progressive_mode(common);
 424         }
 425 }
 426
 427 /*
 428  * vpif_channel_isr: It changes status of the displayed buffer, takes next
 429  * buffer from the queue and sets its address in VPIF registers
 430  */
 431 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 432 {
 433         struct vpif_device *dev = &vpif_obj;
 434         struct channel_obj *ch;
 435         struct common_obj *common;
 436         enum v4l2_field field;
 437         int fid = -1, i;
 438         int channel_id = 0;
 439
 440         channel_id = *(int *)(dev_id);
 441         if (!vpif_intr_status(channel_id + 2))
 442                 return IRQ_NONE;
 443
 444         ch = dev->dev[channel_id];
 445         field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
 446         for (i = 0; i < VPIF_NUMOBJECTS; i++) {
 447                 common = &ch->common[i];
 448                 /* If streaming is started in this channel */
 449                 if (0 == common->started)
 450                         continue;
 451
 452                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 453                         spin_lock(&common->irqlock);
 454                         if (list_empty(&common->dma_queue)) {
 455                                 spin_unlock(&common->irqlock);
 456                                 continue;
 457                         }
 458                         spin_unlock(&common->irqlock);
 459
 460                         /* Progressive mode */
 461                         if (!channel_first_int[i][channel_id]) {
 462                                 /* Mark status of the cur_frm to
 463                                  * done and unlock semaphore on it */
 464                                 v4l2_get_timestamp(&common->cur_frm->vb.
 465                                                    v4l2_buf.timestamp);
 466                                 vb2_buffer_done(&common->cur_frm->vb,
 467                                             VB2_BUF_STATE_DONE);
 468                                 /* Make cur_frm pointing to next_frm */
 469                                 common->cur_frm = common->next_frm;
 470                         }
 471
 472                         channel_first_int[i][channel_id] = 0;
 473                         process_progressive_mode(common);
 474                 } else {
 475                         /* Interlaced mode */
 476                         /* If it is first interrupt, ignore it */
 477
 478                         if (channel_first_int[i][channel_id]) {
 479                                 channel_first_int[i][channel_id] = 0;
 480                                 continue;
 481                         }
 482
 483                         if (0 == i) {
 484                                 ch->field_id ^= 1;
 485                                 /* Get field id from VPIF registers */
 486                                 fid = vpif_channel_getfid(ch->channel_id + 2);
 487                                 /* If fid does not match with stored field id */
 488                                 if (fid != ch->field_id) {
 489                                         /* Make them in sync */
 490                                         if (0 == fid)
 491                                                 ch->field_id = fid;
 492
 493                                         return IRQ_HANDLED;
 494                                 }
 495                         }
 496                         process_interlaced_mode(fid, common);
 497                 }
 498         }
 499
 500         return IRQ_HANDLED;
 501 }
 502
 503 static int vpif_update_std_info(struct channel_obj *ch)
 504 {
 505         struct video_obj *vid_ch = &ch->video;
 506         struct vpif_params *vpifparams = &ch->vpifparams;
 507         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 508         const struct vpif_channel_config_params *config;
 509
 510         int i;
 511
 512         for (i = 0; i < vpif_ch_params_count; i++) {
 513                 config = &vpif_ch_params[i];
 514                 if (config->hd_sd == 0) {
 515                         vpif_dbg(2, debug, "SD format\n");
 516                         if (config->stdid & vid_ch->stdid) {
 517                                 memcpy(std_info, config, sizeof(*config));
 518                                 break;
 519                         }
 520                 }
 521         }
 522
 523         if (i == vpif_ch_params_count) {
 524                 vpif_dbg(1, debug, "Format not found\n");
 525                 return -EINVAL;
 526         }
 527
 528         return 0;
 529 }
 530
 531 static int vpif_update_resolution(struct channel_obj *ch)
 532 {
 533         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 534         struct video_obj *vid_ch = &ch->video;
 535         struct vpif_params *vpifparams = &ch->vpifparams;
 536         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 537
 538         if (!vid_ch->stdid && !vid_ch->dv_timings.bt.height)
 539                 return -EINVAL;
 540
 541         if (vid_ch->stdid) {
 542                 if (vpif_update_std_info(ch))
 543                         return -EINVAL;
 544         }
 545
 546         common->fmt.fmt.pix.width = std_info->width;
 547         common->fmt.fmt.pix.height = std_info->height;
 548         vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
 549                         common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
 550
 551         /* Set height and width paramateres */
 552         common->height = std_info->height;
 553         common->width = std_info->width;
 554
 555         return 0;
 556 }
 557
 558 /*
 559  * vpif_calculate_offsets: This function calculates buffers offset for Y and C
 560  * in the top and bottom field
 561  */
 562 static void vpif_calculate_offsets(struct channel_obj *ch)
 563 {
 564         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 565         struct vpif_params *vpifparams = &ch->vpifparams;
 566         enum v4l2_field field = common->fmt.fmt.pix.field;
 567         struct video_obj *vid_ch = &ch->video;
 568         unsigned int hpitch, vpitch, sizeimage;
 569
 570         if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
 571                 if (ch->vpifparams.std_info.frm_fmt)
 572                         vid_ch->buf_field = V4L2_FIELD_NONE;
 573                 else
 574                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 575         } else {
 576                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 577         }
 578
 579         sizeimage = common->fmt.fmt.pix.sizeimage;
 580
 581         hpitch = common->fmt.fmt.pix.bytesperline;
 582         vpitch = sizeimage / (hpitch * 2);
 583         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 584             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 585                 common->ytop_off = 0;
 586                 common->ybtm_off = hpitch;
 587                 common->ctop_off = sizeimage / 2;
 588                 common->cbtm_off = sizeimage / 2 + hpitch;
 589         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 590                 common->ytop_off = 0;
 591                 common->ybtm_off = sizeimage / 4;
 592                 common->ctop_off = sizeimage / 2;
 593                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 594         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 595                 common->ybtm_off = 0;
 596                 common->ytop_off = sizeimage / 4;
 597                 common->cbtm_off = sizeimage / 2;
 598                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 599         }
 600
 601         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 602             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 603                 vpifparams->video_params.storage_mode = 1;
 604         } else {
 605                 vpifparams->video_params.storage_mode = 0;
 606         }
 607
 608         if (ch->vpifparams.std_info.frm_fmt == 1) {
 609                 vpifparams->video_params.hpitch =
 610                     common->fmt.fmt.pix.bytesperline;
 611         } else {
 612                 if ((field == V4L2_FIELD_ANY) ||
 613                         (field == V4L2_FIELD_INTERLACED))
 614                         vpifparams->video_params.hpitch =
 615                             common->fmt.fmt.pix.bytesperline * 2;
 616                 else
 617                         vpifparams->video_params.hpitch =
 618                             common->fmt.fmt.pix.bytesperline;
 619         }
 620
 621         ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
 622 }
 623
 624 static void vpif_config_format(struct channel_obj *ch)
 625 {
 626         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 627
 628         common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
 629         if (config_params.numbuffers[ch->channel_id] == 0)
 630                 common->memory = V4L2_MEMORY_USERPTR;
 631         else
 632                 common->memory = V4L2_MEMORY_MMAP;
 633
 634         common->fmt.fmt.pix.sizeimage =
 635                         config_params.channel_bufsize[ch->channel_id];
 636         common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 637         common->fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 638 }
 639
 640 static int vpif_check_format(struct channel_obj *ch,
 641                              struct v4l2_pix_format *pixfmt)
 642 {
 643         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 644         enum v4l2_field field = pixfmt->field;
 645         u32 sizeimage, hpitch, vpitch;
 646
 647         if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
 648                 goto invalid_fmt_exit;
 649
 650         if (!(VPIF_VALID_FIELD(field)))
 651                 goto invalid_fmt_exit;
 652
 653         if (pixfmt->bytesperline <= 0)
 654                 goto invalid_pitch_exit;
 655
 656         sizeimage = pixfmt->sizeimage;
 657
 658         if (vpif_update_resolution(ch))
 659                 return -EINVAL;
 660
 661         hpitch = pixfmt->bytesperline;
 662         vpitch = sizeimage / (hpitch * 2);
 663
 664         /* Check for valid value of pitch */
 665         if ((hpitch < ch->vpifparams.std_info.width) ||
 666             (vpitch < ch->vpifparams.std_info.height))
 667                 goto invalid_pitch_exit;
 668
 669         /* Check for 8 byte alignment */
 670         if (!ISALIGNED(hpitch)) {
 671                 vpif_err("invalid pitch alignment\n");
 672                 return -EINVAL;
 673         }
 674         pixfmt->width = common->fmt.fmt.pix.width;
 675         pixfmt->height = common->fmt.fmt.pix.height;
 676
 677         return 0;
 678
 679 invalid_fmt_exit:
 680         vpif_err("invalid field format\n");
 681         return -EINVAL;
 682
 683 invalid_pitch_exit:
 684         vpif_err("invalid pitch\n");
 685         return -EINVAL;
 686 }
 687
 688 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 689 {
 690         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 691
 692         if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
 693                 common->set_addr = ch3_set_videobuf_addr;
 694         } else {
 695                 if (2 == muxmode)
 696                         common->set_addr = ch2_set_videobuf_addr_yc_nmux;
 697                 else
 698                         common->set_addr = ch2_set_videobuf_addr;
 699         }
 700 }
 701
 702 /*
 703  * vpif_mmap: It is used to map kernel space buffers into user spaces
 704  */
 705 static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
 706 {
 707         struct vpif_fh *fh = filep->private_data;
 708         struct channel_obj *ch = fh->channel;
 709         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 710         int ret;
 711
 712         vpif_dbg(2, debug, "vpif_mmap\n");
 713
 714         if (mutex_lock_interruptible(&common->lock))
 715                 return -ERESTARTSYS;
 716         ret = vb2_mmap(&common->buffer_queue, vma);
 717         mutex_unlock(&common->lock);
 718         return ret;
 719 }
 720
 721 /*
 722  * vpif_poll: It is used for select/poll system call
 723  */
 724 static unsigned int vpif_poll(struct file *filep, poll_table *wait)
 725 {
 726         struct vpif_fh *fh = filep->private_data;
 727         struct channel_obj *ch = fh->channel;
 728         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 729         unsigned int res = 0;
 730
 731         if (common->started) {
 732                 mutex_lock(&common->lock);
 733                 res = vb2_poll(&common->buffer_queue, filep, wait);
 734                 mutex_unlock(&common->lock);
 735         }
 736
 737         return res;
 738 }
 739
 740 /*
 741  * vpif_open: It creates object of file handle structure and stores it in
 742  * private_data member of filepointer
 743  */
 744 static int vpif_open(struct file *filep)
 745 {
 746         struct video_device *vdev = video_devdata(filep);
 747         struct channel_obj *ch = video_get_drvdata(vdev);
 748         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 749         struct vpif_fh *fh;
 750
 751         /* Allocate memory for the file handle object */
 752         fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL);
 753         if (fh == NULL) {
 754                 vpif_err("unable to allocate memory for file handle object\n");
 755                 return -ENOMEM;
 756         }
 757
 758         if (mutex_lock_interruptible(&common->lock)) {
 759                 kfree(fh);
 760                 return -ERESTARTSYS;
 761         }
 762         /* store pointer to fh in private_data member of filep */
 763         filep->private_data = fh;
 764         fh->channel = ch;
 765         fh->initialized = 0;
 766         if (!ch->initialized) {
 767                 fh->initialized = 1;
 768                 ch->initialized = 1;
 769                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
 770         }
 771
 772         /* Increment channel usrs counter */
 773         atomic_inc(&ch->usrs);
 774         /* Set io_allowed[VPIF_VIDEO_INDEX] member to false */
 775         fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
 776         /* Initialize priority of this instance to default priority */
 777         fh->prio = V4L2_PRIORITY_UNSET;
 778         v4l2_prio_open(&ch->prio, &fh->prio);
 779         mutex_unlock(&common->lock);
 780
 781         return 0;
 782 }
 783
 784 /*
 785  * vpif_release: This function deletes buffer queue, frees the buffers and
 786  * the vpif file handle
 787  */
 788 static int vpif_release(struct file *filep)
 789 {
 790         struct vpif_fh *fh = filep->private_data;
 791         struct channel_obj *ch = fh->channel;
 792         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 793
 794         mutex_lock(&common->lock);
 795         /* if this instance is doing IO */
 796         if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
 797                 /* Reset io_usrs member of channel object */
 798                 common->io_usrs = 0;
 799                 /* Free buffers allocated */
 800                 vb2_queue_release(&common->buffer_queue);
 801                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
 802
 803                 common->numbuffers =
 804                     config_params.numbuffers[ch->channel_id];
 805         }
 806
 807         /* Decrement channel usrs counter */
 808         atomic_dec(&ch->usrs);
 809         /* If this file handle has initialize encoder device, reset it */
 810         if (fh->initialized)
 811                 ch->initialized = 0;
 812
 813         /* Close the priority */
 814         v4l2_prio_close(&ch->prio, fh->prio);
 815         filep->private_data = NULL;
 816         fh->initialized = 0;
 817         mutex_unlock(&common->lock);
 818         kfree(fh);
 819
 820         return 0;
 821 }
 822
 823 /* functions implementing ioctls */
 824 /**
 825  * vpif_querycap() - QUERYCAP handler
 826  * @file: file ptr
 827  * @priv: file handle
 828  * @cap: ptr to v4l2_capability structure
 829  */
 830 static int vpif_querycap(struct file *file, void  *priv,
 831                                 struct v4l2_capability *cap)
 832 {
 833         struct vpif_display_config *config = vpif_dev->platform_data;
 834
 835         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 836         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 837         snprintf(cap->driver, sizeof(cap->driver), "%s", dev_name(vpif_dev));
 838         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 839                  dev_name(vpif_dev));
 840         strlcpy(cap->card, config->card_name, sizeof(cap->card));
 841
 842         return 0;
 843 }
 844
 845 static int vpif_enum_fmt_vid_out(struct file *file, void  *priv,
 846                                         struct v4l2_fmtdesc *fmt)
 847 {
 848         if (fmt->index != 0) {
 849                 vpif_err("Invalid format index\n");
 850                 return -EINVAL;
 851         }
 852
 853         /* Fill in the information about format */
 854         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 855         strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
 856         fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 857
 858         return 0;
 859 }
 860
 861 static int vpif_g_fmt_vid_out(struct file *file, void *priv,
 862                                 struct v4l2_format *fmt)
 863 {
 864         struct vpif_fh *fh = priv;
 865         struct channel_obj *ch = fh->channel;
 866         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 867
 868         /* Check the validity of the buffer type */
 869         if (common->fmt.type != fmt->type)
 870                 return -EINVAL;
 871
 872         if (vpif_update_resolution(ch))
 873                 return -EINVAL;
 874         *fmt = common->fmt;
 875         return 0;
 876 }
 877
 878 static int vpif_s_fmt_vid_out(struct file *file, void *priv,
 879                                 struct v4l2_format *fmt)
 880 {
 881         struct vpif_fh *fh = priv;
 882         struct v4l2_pix_format *pixfmt;
 883         struct channel_obj *ch = fh->channel;
 884         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 885         int ret = 0;
 886
 887         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 888             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 889                 if (!fh->initialized) {
 890                         vpif_dbg(1, debug, "Channel Busy\n");
 891                         return -EBUSY;
 892                 }
 893
 894                 /* Check for the priority */
 895                 ret = v4l2_prio_check(&ch->prio, fh->prio);
 896                 if (0 != ret)
 897                         return ret;
 898                 fh->initialized = 1;
 899         }
 900
 901         if (common->started) {
 902                 vpif_dbg(1, debug, "Streaming in progress\n");
 903                 return -EBUSY;
 904         }
 905
 906         pixfmt = &fmt->fmt.pix;
 907         /* Check for valid field format */
 908         ret = vpif_check_format(ch, pixfmt);
 909         if (ret)
 910                 return ret;
 911
 912         /* store the pix format in the channel object */
 913         common->fmt.fmt.pix = *pixfmt;
 914         /* store the format in the channel object */
 915         common->fmt = *fmt;
 916         return 0;
 917 }
 918
 919 static int vpif_try_fmt_vid_out(struct file *file, void *priv,
 920                                 struct v4l2_format *fmt)
 921 {
 922         struct vpif_fh *fh = priv;
 923         struct channel_obj *ch = fh->channel;
 924         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 925         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 926         int ret = 0;
 927
 928         ret = vpif_check_format(ch, pixfmt);
 929         if (ret) {
 930                 *pixfmt = common->fmt.fmt.pix;
 931                 pixfmt->sizeimage = pixfmt->width * pixfmt->height * 2;
 932         }
 933
 934         return ret;
 935 }
 936
 937 static int vpif_reqbufs(struct file *file, void *priv,
 938                         struct v4l2_requestbuffers *reqbuf)
 939 {
 940         struct vpif_fh *fh = priv;
 941         struct channel_obj *ch = fh->channel;
 942         struct common_obj *common;
 943         enum v4l2_field field;
 944         struct vb2_queue *q;
 945         u8 index = 0;
 946         int ret;
 947
 948         /* This file handle has not initialized the channel,
 949            It is not allowed to do settings */
 950         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 951             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 952                 if (!fh->initialized) {
 953                         vpif_err("Channel Busy\n");
 954                         return -EBUSY;
 955                 }
 956         }
 957
 958         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != reqbuf->type)
 959                 return -EINVAL;
 960
 961         index = VPIF_VIDEO_INDEX;
 962
 963         common = &ch->common[index];
 964
 965         if (common->fmt.type != reqbuf->type || !vpif_dev)
 966                 return -EINVAL;
 967         if (0 != common->io_usrs)
 968                 return -EBUSY;
 969
 970         if (reqbuf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 971                 if (common->fmt.fmt.pix.field == V4L2_FIELD_ANY)
 972                         field = V4L2_FIELD_INTERLACED;
 973                 else
 974                         field = common->fmt.fmt.pix.field;
 975         } else {
 976                 field = V4L2_VBI_INTERLACED;
 977         }
 978         /* Initialize videobuf2 queue as per the buffer type */
 979         common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
 980         if (IS_ERR(common->alloc_ctx)) {
 981                 vpif_err("Failed to get the context\n");
 982                 return PTR_ERR(common->alloc_ctx);
 983         }
 984         q = &common->buffer_queue;
 985         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 986         q->io_modes = VB2_MMAP | VB2_USERPTR;
 987         q->drv_priv = fh;
 988         q->ops = &video_qops;
 989         q->mem_ops = &vb2_dma_contig_memops;
 990         q->buf_struct_size = sizeof(struct vpif_disp_buffer);
 991         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 992         q->min_buffers_needed = 1;
 993
 994         ret = vb2_queue_init(q);
 995         if (ret) {
 996                 vpif_err("vpif_display: vb2_queue_init() failed\n");
 997                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
 998                 return ret;
 999         }
1000         /* Set io allowed member of file handle to TRUE */
1001         fh->io_allowed[index] = 1;
1002         /* Increment io usrs member of channel object to 1 */
1003         common->io_usrs = 1;
1004         /* Store type of memory requested in channel object */
1005         common->memory = reqbuf->memory;
1006         INIT_LIST_HEAD(&common->dma_queue);
1007         /* Allocate buffers */
1008         return vb2_reqbufs(&common->buffer_queue, reqbuf);
1009 }
1010
1011 static int vpif_querybuf(struct file *file, void *priv,
1012                                 struct v4l2_buffer *tbuf)
1013 {
1014         struct vpif_fh *fh = priv;
1015         struct channel_obj *ch = fh->channel;
1016         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1017
1018         if (common->fmt.type != tbuf->type)
1019                 return -EINVAL;
1020
1021         return vb2_querybuf(&common->buffer_queue, tbuf);
1022 }
1023
1024 static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
1025 {
1026         struct vpif_fh *fh = NULL;
1027         struct channel_obj *ch = NULL;
1028         struct common_obj *common = NULL;
1029
1030         if (!buf || !priv)
1031                 return -EINVAL;
1032
1033         fh = priv;
1034         ch = fh->channel;
1035         if (!ch)
1036                 return -EINVAL;
1037
1038         common = &(ch->common[VPIF_VIDEO_INDEX]);
1039         if (common->fmt.type != buf->type)
1040                 return -EINVAL;
1041
1042         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1043                 vpif_err("fh->io_allowed\n");
1044                 return -EACCES;
1045         }
1046
1047         return vb2_qbuf(&common->buffer_queue, buf);
1048 }
1049
1050 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
1051 {
1052         struct vpif_fh *fh = priv;
1053         struct channel_obj *ch = fh->channel;
1054         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1055         int ret = 0;
1056
1057         if (!(std_id & VPIF_V4L2_STD))
1058                 return -EINVAL;
1059
1060         if (common->started) {
1061                 vpif_err("streaming in progress\n");
1062                 return -EBUSY;
1063         }
1064
1065         /* Call encoder subdevice function to set the standard */
1066         ch->video.stdid = std_id;
1067         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1068         /* Get the information about the standard */
1069         if (vpif_update_resolution(ch))
1070                 return -EINVAL;
1071
1072         if ((ch->vpifparams.std_info.width *
1073                 ch->vpifparams.std_info.height * 2) >
1074                 config_params.channel_bufsize[ch->channel_id]) {
1075                 vpif_err("invalid std for this size\n");
1076                 return -EINVAL;
1077         }
1078
1079         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
1080         /* Configure the default format information */
1081         vpif_config_format(ch);
1082
1083         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
1084                                                 s_std_output, std_id);
1085         if (ret < 0) {
1086                 vpif_err("Failed to set output standard\n");
1087                 return ret;
1088         }
1089
1090         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, core,
1091                                                         s_std, std_id);
1092         if (ret < 0)
1093                 vpif_err("Failed to set standard for sub devices\n");
1094         return ret;
1095 }
1096
1097 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1098 {
1099         struct vpif_fh *fh = priv;
1100         struct channel_obj *ch = fh->channel;
1101
1102         *std = ch->video.stdid;
1103         return 0;
1104 }
1105
1106 static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
1107 {
1108         struct vpif_fh *fh = priv;
1109         struct channel_obj *ch = fh->channel;
1110         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1111
1112         return vb2_dqbuf(&common->buffer_queue, p,
1113                                         (file->f_flags & O_NONBLOCK));
1114 }
1115
1116 static int vpif_streamon(struct file *file, void *priv,
1117                                 enum v4l2_buf_type buftype)
1118 {
1119         struct vpif_fh *fh = priv;
1120         struct channel_obj *ch = fh->channel;
1121         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1122         struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1123         int ret = 0;
1124
1125         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1126                 vpif_err("buffer type not supported\n");
1127                 return -EINVAL;
1128         }
1129
1130         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1131                 vpif_err("fh->io_allowed\n");
1132                 return -EACCES;
1133         }
1134
1135         /* If Streaming is already started, return error */
1136         if (common->started) {
1137                 vpif_err("channel->started\n");
1138                 return -EBUSY;
1139         }
1140
1141         if ((ch->channel_id == VPIF_CHANNEL2_VIDEO
1142                 && oth_ch->common[VPIF_VIDEO_INDEX].started &&
1143                 ch->vpifparams.std_info.ycmux_mode == 0)
1144                 || ((ch->channel_id == VPIF_CHANNEL3_VIDEO)
1145                 && (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1146                 vpif_err("other channel is using\n");
1147                 return -EBUSY;
1148         }
1149
1150         ret = vpif_check_format(ch, &common->fmt.fmt.pix);
1151         if (ret < 0)
1152                 return ret;
1153
1154         /* Call vb2_streamon to start streaming in videobuf2 */
1155         ret = vb2_streamon(&common->buffer_queue, buftype);
1156         if (ret < 0) {
1157                 vpif_err("vb2_streamon\n");
1158                 return ret;
1159         }
1160
1161         return ret;
1162 }
1163
1164 static int vpif_streamoff(struct file *file, void *priv,
1165                                 enum v4l2_buf_type buftype)
1166 {
1167         struct vpif_fh *fh = priv;
1168         struct channel_obj *ch = fh->channel;
1169         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1170         struct vpif_display_config *vpif_config_data =
1171                                         vpif_dev->platform_data;
1172
1173         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1174                 vpif_err("buffer type not supported\n");
1175                 return -EINVAL;
1176         }
1177
1178         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1179                 vpif_err("fh->io_allowed\n");
1180                 return -EACCES;
1181         }
1182
1183         if (!common->started) {
1184                 vpif_err("channel->started\n");
1185                 return -EINVAL;
1186         }
1187
1188         if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1189                 /* disable channel */
1190                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
1191                         if (vpif_config_data->
1192                                 chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
1193                                 channel2_clipping_enable(0);
1194                         enable_channel2(0);
1195                         channel2_intr_enable(0);
1196                 }
1197                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
1198                                         (2 == common->started)) {
1199                         if (vpif_config_data->
1200                                 chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
1201                                 channel3_clipping_enable(0);
1202                         enable_channel3(0);
1203                         channel3_intr_enable(0);
1204                 }
1205         }
1206
1207         common->started = 0;
1208         return vb2_streamoff(&common->buffer_queue, buftype);
1209 }
1210
1211 static int vpif_cropcap(struct file *file, void *priv,
1212                         struct v4l2_cropcap *crop)
1213 {
1214         struct vpif_fh *fh = priv;
1215         struct channel_obj *ch = fh->channel;
1216         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1217         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != crop->type)
1218                 return -EINVAL;
1219
1220         crop->bounds.left = crop->bounds.top = 0;
1221         crop->defrect.left = crop->defrect.top = 0;
1222         crop->defrect.height = crop->bounds.height = common->height;
1223         crop->defrect.width = crop->bounds.width = common->width;
1224
1225         return 0;
1226 }
1227
1228 static int vpif_enum_output(struct file *file, void *fh,
1229                                 struct v4l2_output *output)
1230 {
1231
1232         struct vpif_display_config *config = vpif_dev->platform_data;
1233         struct vpif_display_chan_config *chan_cfg;
1234         struct vpif_fh *vpif_handler = fh;
1235         struct channel_obj *ch = vpif_handler->channel;
1236
1237         chan_cfg = &config->chan_config[ch->channel_id];
1238         if (output->index >= chan_cfg->output_count) {
1239                 vpif_dbg(1, debug, "Invalid output index\n");
1240                 return -EINVAL;
1241         }
1242
1243         *output = chan_cfg->outputs[output->index].output;
1244         return 0;
1245 }
1246
1247 /**
1248  * vpif_output_to_subdev() - Maps output to sub device
1249  * @vpif_cfg - global config ptr
1250  * @chan_cfg - channel config ptr
1251  * @index - Given output index from application
1252  *
1253  * lookup the sub device information for a given output index.
1254  * we report all the output to application. output table also
1255  * has sub device name for the each output
1256  */
1257 static int
1258 vpif_output_to_subdev(struct vpif_display_config *vpif_cfg,
1259                       struct vpif_display_chan_config *chan_cfg, int index)
1260 {
1261         struct vpif_subdev_info *subdev_info;
1262         const char *subdev_name;
1263         int i;
1264
1265         vpif_dbg(2, debug, "vpif_output_to_subdev\n");
1266
1267         if (chan_cfg->outputs == NULL)
1268                 return -1;
1269
1270         subdev_name = chan_cfg->outputs[index].subdev_name;
1271         if (subdev_name == NULL)
1272                 return -1;
1273
1274         /* loop through the sub device list to get the sub device info */
1275         for (i = 0; i < vpif_cfg->subdev_count; i++) {
1276                 subdev_info = &vpif_cfg->subdevinfo[i];
1277                 if (!strcmp(subdev_info->name, subdev_name))
1278                         return i;
1279         }
1280         return -1;
1281 }
1282
1283 /**
1284  * vpif_set_output() - Select an output
1285  * @vpif_cfg - global config ptr
1286  * @ch - channel
1287  * @index - Given output index from application
1288  *
1289  * Select the given output.
1290  */
1291 static int vpif_set_output(struct vpif_display_config *vpif_cfg,
1292                       struct channel_obj *ch, int index)
1293 {
1294         struct vpif_display_chan_config *chan_cfg =
1295                 &vpif_cfg->chan_config[ch->channel_id];
1296         struct vpif_subdev_info *subdev_info = NULL;
1297         struct v4l2_subdev *sd = NULL;
1298         u32 input = 0, output = 0;
1299         int sd_index;
1300         int ret;
1301
1302         sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
1303         if (sd_index >= 0) {
1304                 sd = vpif_obj.sd[sd_index];
1305                 subdev_info = &vpif_cfg->subdevinfo[sd_index];
1306         }
1307
1308         if (sd) {
1309                 input = chan_cfg->outputs[index].input_route;
1310                 output = chan_cfg->outputs[index].output_route;
1311                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
1312                 if (ret < 0 && ret != -ENOIOCTLCMD) {
1313                         vpif_err("Failed to set output\n");
1314                         return ret;
1315                 }
1316
1317         }
1318         ch->output_idx = index;
1319         ch->sd = sd;
1320         if (chan_cfg->outputs != NULL)
1321                 /* update tvnorms from the sub device output info */
1322                 ch->video_dev->tvnorms = chan_cfg->outputs[index].output.std;
1323         return 0;
1324 }
1325
1326 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
1327 {
1328         struct vpif_display_config *config = vpif_dev->platform_data;
1329         struct vpif_display_chan_config *chan_cfg;
1330         struct vpif_fh *fh = priv;
1331         struct channel_obj *ch = fh->channel;
1332         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1333
1334         chan_cfg = &config->chan_config[ch->channel_id];
1335
1336         if (i >= chan_cfg->output_count)
1337                 return -EINVAL;
1338
1339         if (common->started) {
1340                 vpif_err("Streaming in progress\n");
1341                 return -EBUSY;
1342         }
1343
1344         return vpif_set_output(config, ch, i);
1345 }
1346
1347 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
1348 {
1349         struct vpif_fh *fh = priv;
1350         struct channel_obj *ch = fh->channel;
1351
1352         *i = ch->output_idx;
1353
1354         return 0;
1355 }
1356
1357 static int vpif_g_priority(struct file *file, void *priv, enum v4l2_priority *p)
1358 {
1359         struct vpif_fh *fh = priv;
1360         struct channel_obj *ch = fh->channel;
1361
1362         *p = v4l2_prio_max(&ch->prio);
1363
1364         return 0;
1365 }
1366
1367 static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1368 {
1369         struct vpif_fh *fh = priv;
1370         struct channel_obj *ch = fh->channel;
1371
1372         return v4l2_prio_change(&ch->prio, &fh->prio, p);
1373 }
1374
1375 /**
1376  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
1377  * @file: file ptr
1378  * @priv: file handle
1379  * @timings: input timings
1380  */
1381 static int
1382 vpif_enum_dv_timings(struct file *file, void *priv,
1383                      struct v4l2_enum_dv_timings *timings)
1384 {
1385         struct vpif_fh *fh = priv;
1386         struct channel_obj *ch = fh->channel;
1387         int ret;
1388
1389         ret = v4l2_subdev_call(ch->sd, video, enum_dv_timings, timings);
1390         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1391                 return -EINVAL;
1392         return ret;
1393 }
1394
1395 /**
1396  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1397  * @file: file ptr
1398  * @priv: file handle
1399  * @timings: digital video timings
1400  */
1401 static int vpif_s_dv_timings(struct file *file, void *priv,
1402                 struct v4l2_dv_timings *timings)
1403 {
1404         struct vpif_fh *fh = priv;
1405         struct channel_obj *ch = fh->channel;
1406         struct vpif_params *vpifparams = &ch->vpifparams;
1407         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1408         struct video_obj *vid_ch = &ch->video;
1409         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
1410         int ret;
1411
1412         if (timings->type != V4L2_DV_BT_656_1120) {
1413                 vpif_dbg(2, debug, "Timing type not defined\n");
1414                 return -EINVAL;
1415         }
1416
1417         /* Configure subdevice timings, if any */
1418         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
1419         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1420                 ret = 0;
1421         if (ret < 0) {
1422                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1423                 return ret;
1424         }
1425
1426         if (!(timings->bt.width && timings->bt.height &&
1427                                 (timings->bt.hbackporch ||
1428                                  timings->bt.hfrontporch ||
1429                                  timings->bt.hsync) &&
1430                                 timings->bt.vfrontporch &&
1431                                 (timings->bt.vbackporch ||
1432                                  timings->bt.vsync))) {
1433                 vpif_dbg(2, debug, "Timings for width, height, "
1434                                 "horizontal back porch, horizontal sync, "
1435                                 "horizontal front porch, vertical back porch, "
1436                                 "vertical sync and vertical back porch "
1437                                 "must be defined\n");
1438                 return -EINVAL;
1439         }
1440
1441         vid_ch->dv_timings = *timings;
1442
1443         /* Configure video port timings */
1444
1445         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
1446         std_info->sav2eav = bt->width;
1447
1448         std_info->l1 = 1;
1449         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1450
1451         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
1452         if (bt->interlaced) {
1453                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1454                         std_info->l5 = std_info->vsize/2 -
1455                                 (bt->vfrontporch - 1);
1456                         std_info->l7 = std_info->vsize/2 + 1;
1457                         std_info->l9 = std_info->l7 + bt->il_vsync +
1458                                 bt->il_vbackporch + 1;
1459                         std_info->l11 = std_info->vsize -
1460                                 (bt->il_vfrontporch - 1);
1461                 } else {
1462                         vpif_dbg(2, debug, "Required timing values for "
1463                                         "interlaced BT format missing\n");
1464                         return -EINVAL;
1465                 }
1466         } else {
1467                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1468         }
1469         strncpy(std_info->name, "Custom timings BT656/1120",
1470                         VPIF_MAX_NAME);
1471         std_info->width = bt->width;
1472         std_info->height = bt->height;
1473         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1474         std_info->ycmux_mode = 0;
1475         std_info->capture_format = 0;
1476         std_info->vbi_supported = 0;
1477         std_info->hd_sd = 1;
1478         std_info->stdid = 0;
1479         vid_ch->stdid = 0;
1480
1481         return 0;
1482 }
1483
1484 /**
1485  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1486  * @file: file ptr
1487  * @priv: file handle
1488  * @timings: digital video timings
1489  */
1490 static int vpif_g_dv_timings(struct file *file, void *priv,
1491                 struct v4l2_dv_timings *timings)
1492 {
1493         struct vpif_fh *fh = priv;
1494         struct channel_obj *ch = fh->channel;
1495         struct video_obj *vid_ch = &ch->video;
1496
1497         *timings = vid_ch->dv_timings;
1498
1499         return 0;
1500 }
1501
1502 /*
1503  * vpif_log_status() - Status information
1504  * @file: file ptr
1505  * @priv: file handle
1506  *
1507  * Returns zero.
1508  */
1509 static int vpif_log_status(struct file *filep, void *priv)
1510 {
1511         /* status for sub devices */
1512         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1513
1514         return 0;
1515 }
1516
1517 /* vpif display ioctl operations */
1518 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1519         .vidioc_querycap                = vpif_querycap,
1520         .vidioc_g_priority              = vpif_g_priority,
1521         .vidioc_s_priority              = vpif_s_priority,
1522         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1523         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1524         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1525         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1526         .vidioc_reqbufs                 = vpif_reqbufs,
1527         .vidioc_querybuf                = vpif_querybuf,
1528         .vidioc_qbuf                    = vpif_qbuf,
1529         .vidioc_dqbuf                   = vpif_dqbuf,
1530         .vidioc_streamon                = vpif_streamon,
1531         .vidioc_streamoff               = vpif_streamoff,
1532         .vidioc_s_std                   = vpif_s_std,
1533         .vidioc_g_std                   = vpif_g_std,
1534         .vidioc_enum_output             = vpif_enum_output,
1535         .vidioc_s_output                = vpif_s_output,
1536         .vidioc_g_output                = vpif_g_output,
1537         .vidioc_cropcap                 = vpif_cropcap,
1538         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1539         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1540         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1541         .vidioc_log_status              = vpif_log_status,
1542 };
1543
1544 static const struct v4l2_file_operations vpif_fops = {
1545         .owner          = THIS_MODULE,
1546         .open           = vpif_open,
1547         .release        = vpif_release,
1548         .unlocked_ioctl = video_ioctl2,
1549         .mmap           = vpif_mmap,
1550         .poll           = vpif_poll
1551 };
1552
1553 static struct video_device vpif_video_template = {
1554         .name           = "vpif",
1555         .fops           = &vpif_fops,
1556         .ioctl_ops      = &vpif_ioctl_ops,
1557 };
1558
1559 /*Configure the channels, buffer sizei, request irq */
1560 static int initialize_vpif(void)
1561 {
1562         int free_channel_objects_index;
1563         int free_buffer_channel_index;
1564         int free_buffer_index;
1565         int err = 0, i, j;
1566
1567         /* Default number of buffers should be 3 */
1568         if ((ch2_numbuffers > 0) &&
1569             (ch2_numbuffers < config_params.min_numbuffers))
1570                 ch2_numbuffers = config_params.min_numbuffers;
1571         if ((ch3_numbuffers > 0) &&
1572             (ch3_numbuffers < config_params.min_numbuffers))
1573                 ch3_numbuffers = config_params.min_numbuffers;
1574
1575         /* Set buffer size to min buffers size if invalid buffer size is
1576          * given */
1577         if (ch2_bufsize < config_params.min_bufsize[VPIF_CHANNEL2_VIDEO])
1578                 ch2_bufsize =
1579                     config_params.min_bufsize[VPIF_CHANNEL2_VIDEO];
1580         if (ch3_bufsize < config_params.min_bufsize[VPIF_CHANNEL3_VIDEO])
1581                 ch3_bufsize =
1582                     config_params.min_bufsize[VPIF_CHANNEL3_VIDEO];
1583
1584         config_params.numbuffers[VPIF_CHANNEL2_VIDEO] = ch2_numbuffers;
1585
1586         if (ch2_numbuffers) {
1587                 config_params.channel_bufsize[VPIF_CHANNEL2_VIDEO] =
1588                                                         ch2_bufsize;
1589         }
1590         config_params.numbuffers[VPIF_CHANNEL3_VIDEO] = ch3_numbuffers;
1591
1592         if (ch3_numbuffers) {
1593                 config_params.channel_bufsize[VPIF_CHANNEL3_VIDEO] =
1594                                                         ch3_bufsize;
1595         }
1596
1597         /* Allocate memory for six channel objects */
1598         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1599                 vpif_obj.dev[i] =
1600                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1601                 /* If memory allocation fails, return error */
1602                 if (!vpif_obj.dev[i]) {
1603                         free_channel_objects_index = i;
1604                         err = -ENOMEM;
1605                         goto vpif_init_free_channel_objects;
1606                 }
1607         }
1608
1609         free_channel_objects_index = VPIF_DISPLAY_MAX_DEVICES;
1610         free_buffer_channel_index = VPIF_DISPLAY_NUM_CHANNELS;
1611         free_buffer_index = config_params.numbuffers[i - 1];
1612
1613         return 0;
1614
1615 vpif_init_free_channel_objects:
1616         for (j = 0; j < free_channel_objects_index; j++)
1617                 kfree(vpif_obj.dev[j]);
1618         return err;
1619 }
1620
1621 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1622                             struct v4l2_subdev *subdev,
1623                             struct v4l2_async_subdev *asd)
1624 {
1625         int i;
1626
1627         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1628                 if (!strcmp(vpif_obj.config->subdevinfo[i].name,
1629                             subdev->name)) {
1630                         vpif_obj.sd[i] = subdev;
1631                         vpif_obj.sd[i]->grp_id = 1 << i;
1632                         return 0;
1633                 }
1634
1635         return -EINVAL;
1636 }
1637
1638 static int vpif_probe_complete(void)
1639 {
1640         struct common_obj *common;
1641         struct channel_obj *ch;
1642         int j, err, k;
1643
1644         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1645                 ch = vpif_obj.dev[j];
1646                 /* Initialize field of the channel objects */
1647                 atomic_set(&ch->usrs, 0);
1648                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1649                         ch->common[k].numbuffers = 0;
1650                         common = &ch->common[k];
1651                         common->io_usrs = 0;
1652                         common->started = 0;
1653                         spin_lock_init(&common->irqlock);
1654                         mutex_init(&common->lock);
1655                         common->numbuffers = 0;
1656                         common->set_addr = NULL;
1657                         common->ytop_off = 0;
1658                         common->ybtm_off = 0;
1659                         common->ctop_off = 0;
1660                         common->cbtm_off = 0;
1661                         common->cur_frm = NULL;
1662                         common->next_frm = NULL;
1663                         memset(&common->fmt, 0, sizeof(common->fmt));
1664                         common->numbuffers = config_params.numbuffers[k];
1665                 }
1666                 ch->initialized = 0;
1667                 if (vpif_obj.config->subdev_count)
1668                         ch->sd = vpif_obj.sd[0];
1669                 ch->channel_id = j;
1670                 if (j < 2)
1671                         ch->common[VPIF_VIDEO_INDEX].numbuffers =
1672                             config_params.numbuffers[ch->channel_id];
1673                 else
1674                         ch->common[VPIF_VIDEO_INDEX].numbuffers = 0;
1675
1676                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1677
1678                 /* Initialize prio member of channel object */
1679                 v4l2_prio_init(&ch->prio);
1680                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1681                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1682                 ch->video_dev->lock = &common->lock;
1683                 video_set_drvdata(ch->video_dev, ch);
1684
1685                 /* select output 0 */
1686                 err = vpif_set_output(vpif_obj.config, ch, 0);
1687                 if (err)
1688                         goto probe_out;
1689
1690                 /* register video device */
1691                 vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
1692                          (int)ch, (int)&ch->video_dev);
1693
1694                 err = video_register_device(ch->video_dev,
1695                                           VFL_TYPE_GRABBER, (j ? 3 : 2));
1696                 if (err < 0)
1697                         goto probe_out;
1698         }
1699
1700         return 0;
1701
1702 probe_out:
1703         for (k = 0; k < j; k++) {
1704                 ch = vpif_obj.dev[k];
1705                 video_unregister_device(ch->video_dev);
1706                 video_device_release(ch->video_dev);
1707                 ch->video_dev = NULL;
1708         }
1709         return err;
1710 }
1711
1712 static int vpif_async_complete(struct v4l2_async_notifier *notifier)
1713 {
1714         return vpif_probe_complete();
1715 }
1716
1717 /*
1718  * vpif_probe: This function creates device entries by register itself to the
1719  * V4L2 driver and initializes fields of each channel objects
1720  */
1721 static __init int vpif_probe(struct platform_device *pdev)
1722 {
1723         struct vpif_subdev_info *subdevdata;
1724         int i, j = 0, err = 0;
1725         int res_idx = 0;
1726         struct i2c_adapter *i2c_adap;
1727         struct channel_obj *ch;
1728         struct video_device *vfd;
1729         struct resource *res;
1730         int subdev_count;
1731         size_t size;
1732
1733         vpif_dev = &pdev->dev;
1734         err = initialize_vpif();
1735
1736         if (err) {
1737                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1738                 return err;
1739         }
1740
1741         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1742         if (err) {
1743                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1744                 return err;
1745         }
1746
1747         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1748                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
1749                                         IRQF_SHARED, "VPIF_Display",
1750                                         (void *)(&vpif_obj.dev[res_idx]->
1751                                         channel_id));
1752                 if (err) {
1753                         err = -EINVAL;
1754                         vpif_err("VPIF IRQ request failed\n");
1755                         goto vpif_unregister;
1756                 }
1757                 res_idx++;
1758         }
1759
1760         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1761                 /* Get the pointer to the channel object */
1762                 ch = vpif_obj.dev[i];
1763
1764                 /* Allocate memory for video device */
1765                 vfd = video_device_alloc();
1766                 if (vfd == NULL) {
1767                         for (j = 0; j < i; j++) {
1768                                 ch = vpif_obj.dev[j];
1769                                 video_device_release(ch->video_dev);
1770                         }
1771                         err = -ENOMEM;
1772                         goto vpif_unregister;
1773                 }
1774
1775                 /* Initialize field of video device */
1776                 *vfd = vpif_video_template;
1777                 vfd->v4l2_dev = &vpif_obj.v4l2_dev;
1778                 vfd->release = video_device_release;
1779                 vfd->vfl_dir = VFL_DIR_TX;
1780                 snprintf(vfd->name, sizeof(vfd->name),
1781                          "VPIF_Display_DRIVER_V%s",
1782                          VPIF_DISPLAY_VERSION);
1783
1784                 /* Set video_dev to the video device */
1785                 ch->video_dev = vfd;
1786         }
1787
1788         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1789         if (res) {
1790                 size = resource_size(res);
1791                 /* The resources are divided into two equal memory and when
1792                  * we have HD output we can add them together
1793                  */
1794                 for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1795                         ch = vpif_obj.dev[j];
1796                         ch->channel_id = j;
1797
1798                         /* only enabled if second resource exists */
1799                         config_params.video_limit[ch->channel_id] = 0;
1800                         if (size)
1801                                 config_params.video_limit[ch->channel_id] =
1802                                                                         size/2;
1803                 }
1804         }
1805         vpif_obj.config = pdev->dev.platform_data;
1806         subdev_count = vpif_obj.config->subdev_count;
1807         subdevdata = vpif_obj.config->subdevinfo;
1808         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1809                                                                 GFP_KERNEL);
1810         if (vpif_obj.sd == NULL) {
1811                 vpif_err("unable to allocate memory for subdevice pointers\n");
1812                 err = -ENOMEM;
1813                 goto vpif_sd_error;
1814         }
1815
1816         if (!vpif_obj.config->asd_sizes) {
1817                 i2c_adap = i2c_get_adapter(1);
1818                 for (i = 0; i < subdev_count; i++) {
1819                         vpif_obj.sd[i] =
1820                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1821                                                           i2c_adap,
1822                                                           &subdevdata[i].
1823                                                           board_info,
1824                                                           NULL);
1825                         if (!vpif_obj.sd[i]) {
1826                                 vpif_err("Error registering v4l2 subdevice\n");
1827                                 err = -ENODEV;
1828                                 goto probe_subdev_out;
1829                         }
1830
1831                         if (vpif_obj.sd[i])
1832                                 vpif_obj.sd[i]->grp_id = 1 << i;
1833                 }
1834                 vpif_probe_complete();
1835         } else {
1836                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
1837                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
1838                 vpif_obj.notifier.bound = vpif_async_bound;
1839                 vpif_obj.notifier.complete = vpif_async_complete;
1840                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
1841                                                    &vpif_obj.notifier);
1842                 if (err) {
1843                         vpif_err("Error registering async notifier\n");
1844                         err = -EINVAL;
1845                         goto probe_subdev_out;
1846                 }
1847         }
1848
1849         return 0;
1850
1851 probe_subdev_out:
1852         kfree(vpif_obj.sd);
1853 vpif_sd_error:
1854         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1855                 ch = vpif_obj.dev[i];
1856                 /* Note: does nothing if ch->video_dev == NULL */
1857                 video_device_release(ch->video_dev);
1858         }
1859 vpif_unregister:
1860         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1861
1862         return err;
1863 }
1864
1865 /*
1866  * vpif_remove: It un-register channels from V4L2 driver
1867  */
1868 static int vpif_remove(struct platform_device *device)
1869 {
1870         struct channel_obj *ch;
1871         int i;
1872
1873         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1874
1875         kfree(vpif_obj.sd);
1876         /* un-register device */
1877         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1878                 /* Get the pointer to the channel object */
1879                 ch = vpif_obj.dev[i];
1880                 /* Unregister video device */
1881                 video_unregister_device(ch->video_dev);
1882
1883                 ch->video_dev = NULL;
1884                 kfree(vpif_obj.dev[i]);
1885         }
1886
1887         return 0;
1888 }
1889
1890 #ifdef CONFIG_PM
1891 static int vpif_suspend(struct device *dev)
1892 {
1893         struct common_obj *common;
1894         struct channel_obj *ch;
1895         int i;
1896
1897         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1898                 /* Get the pointer to the channel object */
1899                 ch = vpif_obj.dev[i];
1900                 common = &ch->common[VPIF_VIDEO_INDEX];
1901                 mutex_lock(&common->lock);
1902                 if (atomic_read(&ch->usrs) && common->io_usrs) {
1903                         /* Disable channel */
1904                         if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1905                                 enable_channel2(0);
1906                                 channel2_intr_enable(0);
1907                         }
1908                         if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1909                                         common->started == 2) {
1910                                 enable_channel3(0);
1911                                 channel3_intr_enable(0);
1912                         }
1913                 }
1914                 mutex_unlock(&common->lock);
1915         }
1916
1917         return 0;
1918 }
1919
1920 static int vpif_resume(struct device *dev)
1921 {
1922
1923         struct common_obj *common;
1924         struct channel_obj *ch;
1925         int i;
1926
1927         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1928                 /* Get the pointer to the channel object */
1929                 ch = vpif_obj.dev[i];
1930                 common = &ch->common[VPIF_VIDEO_INDEX];
1931                 mutex_lock(&common->lock);
1932                 if (atomic_read(&ch->usrs) && common->io_usrs) {
1933                         /* Enable channel */
1934                         if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1935                                 enable_channel2(1);
1936                                 channel2_intr_enable(1);
1937                         }
1938                         if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1939                                         common->started == 2) {
1940                                 enable_channel3(1);
1941                                 channel3_intr_enable(1);
1942                         }
1943                 }
1944                 mutex_unlock(&common->lock);
1945         }
1946
1947         return 0;
1948 }
1949
1950 static const struct dev_pm_ops vpif_pm = {
1951         .suspend        = vpif_suspend,
1952         .resume         = vpif_resume,
1953 };
1954
1955 #define vpif_pm_ops (&vpif_pm)
1956 #else
1957 #define vpif_pm_ops NULL
1958 #endif
1959
1960 static __refdata struct platform_driver vpif_driver = {
1961         .driver = {
1962                         .name   = "vpif_display",
1963                         .owner  = THIS_MODULE,
1964                         .pm     = vpif_pm_ops,
1965         },
1966         .probe  = vpif_probe,
1967         .remove = vpif_remove,
1968 };
1969
1970 module_platform_driver(vpif_driver);