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