Pileus Git - ~andy/linux/blob - drivers/media/video/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/kernel.h>
  18 #include <linux/init.h>
  19 #include <linux/module.h>
  20 #include <linux/errno.h>
  21 #include <linux/fs.h>
  22 #include <linux/mm.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/workqueue.h>
  25 #include <linux/string.h>
  26 #include <linux/videodev2.h>
  27 #include <linux/wait.h>
  28 #include <linux/time.h>
  29 #include <linux/i2c.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/io.h>
  32 #include <linux/slab.h>
  33
  34 #include <asm/irq.h>
  35 #include <asm/page.h>
  36
  37 #include <media/adv7343.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-ioctl.h>
  40 #include <media/v4l2-chip-ident.h>
  41
  42 #include "vpif_display.h"
  43 #include "vpif.h"
  44
  45 MODULE_DESCRIPTION("TI DaVinci VPIF Display driver");
  46 MODULE_LICENSE("GPL");
  47 MODULE_VERSION(VPIF_DISPLAY_VERSION);
  48
  49 #define VPIF_V4L2_STD (V4L2_STD_525_60 | V4L2_STD_625_50)
  50
  51 #define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
  52 #define vpif_dbg(level, debug, fmt, arg...)     \
  53                 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
  54
  55 static int debug = 1;
  56 static u32 ch2_numbuffers = 3;
  57 static u32 ch3_numbuffers = 3;
  58 static u32 ch2_bufsize = 1920 * 1080 * 2;
  59 static u32 ch3_bufsize = 720 * 576 * 2;
  60
  61 module_param(debug, int, 0644);
  62 module_param(ch2_numbuffers, uint, S_IRUGO);
  63 module_param(ch3_numbuffers, uint, S_IRUGO);
  64 module_param(ch2_bufsize, uint, S_IRUGO);
  65 module_param(ch3_bufsize, uint, S_IRUGO);
  66
  67 MODULE_PARM_DESC(debug, "Debug level 0-1");
  68 MODULE_PARM_DESC(ch2_numbuffers, "Channel2 buffer count (default:3)");
  69 MODULE_PARM_DESC(ch3_numbuffers, "Channel3 buffer count (default:3)");
  70 MODULE_PARM_DESC(ch2_bufsize, "Channel2 buffer size (default:1920 x 1080 x 2)");
  71 MODULE_PARM_DESC(ch3_bufsize, "Channel3 buffer size (default:720 x 576 x 2)");
  72
  73 static struct vpif_config_params config_params = {
  74         .min_numbuffers         = 3,
  75         .numbuffers[0]          = 3,
  76         .numbuffers[1]          = 3,
  77         .min_bufsize[0]         = 720 * 480 * 2,
  78         .min_bufsize[1]         = 720 * 480 * 2,
  79         .channel_bufsize[0]     = 1920 * 1080 * 2,
  80         .channel_bufsize[1]     = 720 * 576 * 2,
  81 };
  82
  83 static struct vpif_device vpif_obj = { {NULL} };
  84 static struct device *vpif_dev;
  85 static void vpif_calculate_offsets(struct channel_obj *ch);
  86 static void vpif_config_addr(struct channel_obj *ch, int muxmode);
  87
  88 /*
  89  * buffer_prepare: This is the callback function called from vb2_qbuf()
  90  * function the buffer is prepared and user space virtual address is converted
  91  * into physical address
  92  */
  93 static int vpif_buffer_prepare(struct vb2_buffer *vb)
  94 {
  95         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
  96         struct vb2_queue *q = vb->vb2_queue;
  97         struct common_obj *common;
  98         unsigned long addr;
  99
 100         common = &fh->channel->common[VPIF_VIDEO_INDEX];
 101         if (vb->state != VB2_BUF_STATE_ACTIVE &&
 102                 vb->state != VB2_BUF_STATE_PREPARED) {
 103                 vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
 104                 if (vb2_plane_vaddr(vb, 0) &&
 105                 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 106                         goto buf_align_exit;
 107
 108                 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 109                 if (q->streaming &&
 110                         (V4L2_BUF_TYPE_SLICED_VBI_OUTPUT != q->type)) {
 111                         if (!ISALIGNED(addr + common->ytop_off) ||
 112                         !ISALIGNED(addr + common->ybtm_off) ||
 113                         !ISALIGNED(addr + common->ctop_off) ||
 114                         !ISALIGNED(addr + common->cbtm_off))
 115                                 goto buf_align_exit;
 116                 }
 117         }
 118         return 0;
 119
 120 buf_align_exit:
 121         vpif_err("buffer offset not aligned to 8 bytes\n");
 122         return -EINVAL;
 123 }
 124
 125 /*
 126  * vpif_buffer_queue_setup: This function allocates memory for the buffers
 127  */
 128 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 129                                 const struct v4l2_format *fmt,
 130                                 unsigned int *nbuffers, unsigned int *nplanes,
 131                                 unsigned int sizes[], void *alloc_ctxs[])
 132 {
 133         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 134         struct channel_obj *ch = fh->channel;
 135         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 136         unsigned long size;
 137
 138         if (V4L2_MEMORY_MMAP == common->memory) {
 139                 size = config_params.channel_bufsize[ch->channel_id];
 140                 /*
 141                 * Checking if the buffer size exceeds the available buffer
 142                 * ycmux_mode = 0 means 1 channel mode HD and
 143                 * ycmux_mode = 1 means 2 channels mode SD
 144                 */
 145                 if (ch->vpifparams.std_info.ycmux_mode == 0) {
 146                         if (config_params.video_limit[ch->channel_id])
 147                                 while (size * *nbuffers >
 148                                         (config_params.video_limit[0]
 149                                                 + config_params.video_limit[1]))
 150                                         (*nbuffers)--;
 151                 } else {
 152                         if (config_params.video_limit[ch->channel_id])
 153                                 while (size * *nbuffers >
 154                                 config_params.video_limit[ch->channel_id])
 155                                         (*nbuffers)--;
 156                 }
 157         } else {
 158                 size = common->fmt.fmt.pix.sizeimage;
 159         }
 160
 161         if (*nbuffers < config_params.min_numbuffers)
 162                         *nbuffers = config_params.min_numbuffers;
 163
 164         *nplanes = 1;
 165         sizes[0] = size;
 166         alloc_ctxs[0] = common->alloc_ctx;
 167         return 0;
 168 }
 169
 170 /*
 171  * vpif_buffer_queue: This function adds the buffer to DMA queue
 172  */
 173 static void vpif_buffer_queue(struct vb2_buffer *vb)
 174 {
 175         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 176         struct vpif_disp_buffer *buf = container_of(vb,
 177                                 struct vpif_disp_buffer, vb);
 178         struct channel_obj *ch = fh->channel;
 179         struct common_obj *common;
 180
 181         common = &ch->common[VPIF_VIDEO_INDEX];
 182
 183         /* add the buffer to the DMA queue */
 184         list_add_tail(&buf->list, &common->dma_queue);
 185 }
 186
 187 /*
 188  * vpif_buf_cleanup: This function is called from the videobuf2 layer to
 189  * free memory allocated to the buffers
 190  */
 191 static void vpif_buf_cleanup(struct vb2_buffer *vb)
 192 {
 193         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 194         struct vpif_disp_buffer *buf = container_of(vb,
 195                                         struct vpif_disp_buffer, vb);
 196         struct channel_obj *ch = fh->channel;
 197         struct common_obj *common;
 198         unsigned long flags;
 199
 200         common = &ch->common[VPIF_VIDEO_INDEX];
 201
 202         spin_lock_irqsave(&common->irqlock, flags);
 203         if (vb->state == VB2_BUF_STATE_ACTIVE)
 204                 list_del_init(&buf->list);
 205         spin_unlock_irqrestore(&common->irqlock, flags);
 206 }
 207
 208 static void vpif_wait_prepare(struct vb2_queue *vq)
 209 {
 210         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 211         struct channel_obj *ch = fh->channel;
 212         struct common_obj *common;
 213
 214         common = &ch->common[VPIF_VIDEO_INDEX];
 215         mutex_unlock(&common->lock);
 216 }
 217
 218 static void vpif_wait_finish(struct vb2_queue *vq)
 219 {
 220         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 221         struct channel_obj *ch = fh->channel;
 222         struct common_obj *common;
 223
 224         common = &ch->common[VPIF_VIDEO_INDEX];
 225         mutex_lock(&common->lock);
 226 }
 227
 228 static int vpif_buffer_init(struct vb2_buffer *vb)
 229 {
 230         struct vpif_disp_buffer *buf = container_of(vb,
 231                                         struct vpif_disp_buffer, vb);
 232
 233         INIT_LIST_HEAD(&buf->list);
 234
 235         return 0;
 236 }
 237
 238 static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
 239
 240 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 241 {
 242         struct vpif_display_config *vpif_config_data =
 243                                         vpif_dev->platform_data;
 244         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 245         struct channel_obj *ch = fh->channel;
 246         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 247         struct vpif_params *vpif = &ch->vpifparams;
 248         unsigned long addr = 0;
 249         int ret;
 250
 251         /* If buffer queue is empty, return error */
 252         if (list_empty(&common->dma_queue)) {
 253                 vpif_err("buffer queue is empty\n");
 254                 return -EIO;
 255         }
 256
 257         /* Get the next frame from the buffer queue */
 258         common->next_frm = common->cur_frm =
 259                             list_entry(common->dma_queue.next,
 260                                        struct vpif_disp_buffer, list);
 261
 262         list_del(&common->cur_frm->list);
 263         /* Mark state of the current frame to active */
 264         common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 265
 266         /* Initialize field_id and started member */
 267         ch->field_id = 0;
 268         common->started = 1;
 269         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
 270         /* Calculate the offset for Y and C data  in the buffer */
 271         vpif_calculate_offsets(ch);
 272
 273         if ((ch->vpifparams.std_info.frm_fmt &&
 274                 ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE)
 275                 && (common->fmt.fmt.pix.field != V4L2_FIELD_ANY)))
 276                 || (!ch->vpifparams.std_info.frm_fmt
 277                 && (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
 278                 vpif_err("conflict in field format and std format\n");
 279                 return -EINVAL;
 280         }
 281
 282         /* clock settings */
 283         ret =
 284             vpif_config_data->set_clock(ch->vpifparams.std_info.ycmux_mode,
 285                                         ch->vpifparams.std_info.hd_sd);
 286         if (ret < 0) {
 287                 vpif_err("can't set clock\n");
 288                 return ret;
 289         }
 290
 291         /* set the parameters and addresses */
 292         ret = vpif_set_video_params(vpif, ch->channel_id + 2);
 293         if (ret < 0)
 294                 return ret;
 295
 296         common->started = ret;
 297         vpif_config_addr(ch, ret);
 298         common->set_addr((addr + common->ytop_off),
 299                             (addr + common->ybtm_off),
 300                             (addr + common->ctop_off),
 301                             (addr + common->cbtm_off));
 302
 303         /* Set interrupt for both the fields in VPIF
 304             Register enable channel in VPIF register */
 305         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 306                 channel2_intr_assert();
 307                 channel2_intr_enable(1);
 308                 enable_channel2(1);
 309         }
 310
 311         if ((VPIF_CHANNEL3_VIDEO == ch->channel_id)
 312                 || (common->started == 2)) {
 313                 channel3_intr_assert();
 314                 channel3_intr_enable(1);
 315                 enable_channel3(1);
 316         }
 317         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
 318
 319         return 0;
 320 }
 321
 322 /* abort streaming and wait for last buffer */
 323 static int vpif_stop_streaming(struct vb2_queue *vq)
 324 {
 325         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 326         struct channel_obj *ch = fh->channel;
 327         struct common_obj *common;
 328
 329         if (!vb2_is_streaming(vq))
 330                 return 0;
 331
 332         common = &ch->common[VPIF_VIDEO_INDEX];
 333
 334         /* release all active buffers */
 335         while (!list_empty(&common->dma_queue)) {
 336                 common->next_frm = list_entry(common->dma_queue.next,
 337                                                 struct vpif_disp_buffer, list);
 338                 list_del(&common->next_frm->list);
 339                 vb2_buffer_done(&common->next_frm->vb, VB2_BUF_STATE_ERROR);
 340         }
 341
 342         return 0;
 343 }
 344
 345 static struct vb2_ops video_qops = {
 346         .queue_setup            = vpif_buffer_queue_setup,
 347         .wait_prepare           = vpif_wait_prepare,
 348         .wait_finish            = vpif_wait_finish,
 349         .buf_init               = vpif_buffer_init,
 350         .buf_prepare            = vpif_buffer_prepare,
 351         .start_streaming        = vpif_start_streaming,
 352         .stop_streaming         = vpif_stop_streaming,
 353         .buf_cleanup            = vpif_buf_cleanup,
 354         .buf_queue              = vpif_buffer_queue,
 355 };
 356
 357 static void process_progressive_mode(struct common_obj *common)
 358 {
 359         unsigned long addr = 0;
 360
 361         /* Get the next buffer from buffer queue */
 362         common->next_frm = list_entry(common->dma_queue.next,
 363                                 struct vpif_disp_buffer, list);
 364         /* Remove that buffer from the buffer queue */
 365         list_del(&common->next_frm->list);
 366         /* Mark status of the buffer as active */
 367         common->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 368
 369         /* Set top and bottom field addrs in VPIF registers */
 370         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb, 0);
 371         common->set_addr(addr + common->ytop_off,
 372                                  addr + common->ybtm_off,
 373                                  addr + common->ctop_off,
 374                                  addr + common->cbtm_off);
 375 }
 376
 377 static void process_interlaced_mode(int fid, struct common_obj *common)
 378 {
 379         /* device field id and local field id are in sync */
 380         /* If this is even field */
 381         if (0 == fid) {
 382                 if (common->cur_frm == common->next_frm)
 383                         return;
 384
 385                 /* one frame is displayed If next frame is
 386                  *  available, release cur_frm and move on */
 387                 /* Copy frame display time */
 388                 do_gettimeofday(&common->cur_frm->vb.v4l2_buf.timestamp);
 389                 /* Change status of the cur_frm */
 390                 vb2_buffer_done(&common->cur_frm->vb,
 391                                             VB2_BUF_STATE_DONE);
 392                 /* Make cur_frm pointing to next_frm */
 393                 common->cur_frm = common->next_frm;
 394
 395         } else if (1 == fid) {  /* odd field */
 396                 if (list_empty(&common->dma_queue)
 397                     || (common->cur_frm != common->next_frm)) {
 398                         return;
 399                 }
 400                 /* one field is displayed configure the next
 401                  * frame if it is available else hold on current
 402                  * frame */
 403                 /* Get next from the buffer queue */
 404                 process_progressive_mode(common);
 405
 406         }
 407 }
 408
 409 /*
 410  * vpif_channel_isr: It changes status of the displayed buffer, takes next
 411  * buffer from the queue and sets its address in VPIF registers
 412  */
 413 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 414 {
 415         struct vpif_device *dev = &vpif_obj;
 416         struct channel_obj *ch;
 417         struct common_obj *common;
 418         enum v4l2_field field;
 419         int fid = -1, i;
 420         int channel_id = 0;
 421
 422         channel_id = *(int *)(dev_id);
 423         if (!vpif_intr_status(channel_id + 2))
 424                 return IRQ_NONE;
 425
 426         ch = dev->dev[channel_id];
 427         field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
 428         for (i = 0; i < VPIF_NUMOBJECTS; i++) {
 429                 common = &ch->common[i];
 430                 /* If streaming is started in this channel */
 431                 if (0 == common->started)
 432                         continue;
 433
 434                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 435                         if (list_empty(&common->dma_queue))
 436                                 continue;
 437
 438                         /* Progressive mode */
 439                         if (!channel_first_int[i][channel_id]) {
 440                                 /* Mark status of the cur_frm to
 441                                  * done and unlock semaphore on it */
 442                                 do_gettimeofday(&common->cur_frm->vb.
 443                                                 v4l2_buf.timestamp);
 444                                 vb2_buffer_done(&common->cur_frm->vb,
 445                                             VB2_BUF_STATE_DONE);
 446                                 /* Make cur_frm pointing to next_frm */
 447                                 common->cur_frm = common->next_frm;
 448                         }
 449
 450                         channel_first_int[i][channel_id] = 0;
 451                         process_progressive_mode(common);
 452                 } else {
 453                         /* Interlaced mode */
 454                         /* If it is first interrupt, ignore it */
 455
 456                         if (channel_first_int[i][channel_id]) {
 457                                 channel_first_int[i][channel_id] = 0;
 458                                 continue;
 459                         }
 460
 461                         if (0 == i) {
 462                                 ch->field_id ^= 1;
 463                                 /* Get field id from VPIF registers */
 464                                 fid = vpif_channel_getfid(ch->channel_id + 2);
 465                                 /* If fid does not match with stored field id */
 466                                 if (fid != ch->field_id) {
 467                                         /* Make them in sync */
 468                                         if (0 == fid)
 469                                                 ch->field_id = fid;
 470
 471                                         return IRQ_HANDLED;
 472                                 }
 473                         }
 474                         process_interlaced_mode(fid, common);
 475                 }
 476         }
 477
 478         return IRQ_HANDLED;
 479 }
 480
 481 static int vpif_update_std_info(struct channel_obj *ch)
 482 {
 483         struct video_obj *vid_ch = &ch->video;
 484         struct vpif_params *vpifparams = &ch->vpifparams;
 485         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 486         const struct vpif_channel_config_params *config;
 487
 488         int i;
 489
 490         for (i = 0; i < vpif_ch_params_count; i++) {
 491                 config = &ch_params[i];
 492                 if (config->hd_sd == 0) {
 493                         vpif_dbg(2, debug, "SD format\n");
 494                         if (config->stdid & vid_ch->stdid) {
 495                                 memcpy(std_info, config, sizeof(*config));
 496                                 break;
 497                         }
 498                 } else {
 499                         vpif_dbg(2, debug, "HD format\n");
 500                         if (config->dv_preset == vid_ch->dv_preset) {
 501                                 memcpy(std_info, config, sizeof(*config));
 502                                 break;
 503                         }
 504                 }
 505         }
 506
 507         if (i == vpif_ch_params_count) {
 508                 vpif_dbg(1, debug, "Format not found\n");
 509                 return -EINVAL;
 510         }
 511
 512         return 0;
 513 }
 514
 515 static int vpif_update_resolution(struct channel_obj *ch)
 516 {
 517         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 518         struct video_obj *vid_ch = &ch->video;
 519         struct vpif_params *vpifparams = &ch->vpifparams;
 520         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 521
 522         if (!vid_ch->stdid && !vid_ch->dv_preset && !vid_ch->bt_timings.height)
 523                 return -EINVAL;
 524
 525         if (vid_ch->stdid || vid_ch->dv_preset) {
 526                 if (vpif_update_std_info(ch))
 527                         return -EINVAL;
 528         }
 529
 530         common->fmt.fmt.pix.width = std_info->width;
 531         common->fmt.fmt.pix.height = std_info->height;
 532         vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
 533                         common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
 534
 535         /* Set height and width paramateres */
 536         common->height = std_info->height;
 537         common->width = std_info->width;
 538
 539         return 0;
 540 }
 541
 542 /*
 543  * vpif_calculate_offsets: This function calculates buffers offset for Y and C
 544  * in the top and bottom field
 545  */
 546 static void vpif_calculate_offsets(struct channel_obj *ch)
 547 {
 548         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 549         struct vpif_params *vpifparams = &ch->vpifparams;
 550         enum v4l2_field field = common->fmt.fmt.pix.field;
 551         struct video_obj *vid_ch = &ch->video;
 552         unsigned int hpitch, vpitch, sizeimage;
 553
 554         if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
 555                 if (ch->vpifparams.std_info.frm_fmt)
 556                         vid_ch->buf_field = V4L2_FIELD_NONE;
 557                 else
 558                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 559         } else {
 560                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 561         }
 562
 563         sizeimage = common->fmt.fmt.pix.sizeimage;
 564
 565         hpitch = common->fmt.fmt.pix.bytesperline;
 566         vpitch = sizeimage / (hpitch * 2);
 567         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 568             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 569                 common->ytop_off = 0;
 570                 common->ybtm_off = hpitch;
 571                 common->ctop_off = sizeimage / 2;
 572                 common->cbtm_off = sizeimage / 2 + hpitch;
 573         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 574                 common->ytop_off = 0;
 575                 common->ybtm_off = sizeimage / 4;
 576                 common->ctop_off = sizeimage / 2;
 577                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 578         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 579                 common->ybtm_off = 0;
 580                 common->ytop_off = sizeimage / 4;
 581                 common->cbtm_off = sizeimage / 2;
 582                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 583         }
 584
 585         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 586             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 587                 vpifparams->video_params.storage_mode = 1;
 588         } else {
 589                 vpifparams->video_params.storage_mode = 0;
 590         }
 591
 592         if (ch->vpifparams.std_info.frm_fmt == 1) {
 593                 vpifparams->video_params.hpitch =
 594                     common->fmt.fmt.pix.bytesperline;
 595         } else {
 596                 if ((field == V4L2_FIELD_ANY) ||
 597                         (field == V4L2_FIELD_INTERLACED))
 598                         vpifparams->video_params.hpitch =
 599                             common->fmt.fmt.pix.bytesperline * 2;
 600                 else
 601                         vpifparams->video_params.hpitch =
 602                             common->fmt.fmt.pix.bytesperline;
 603         }
 604
 605         ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
 606 }
 607
 608 static void vpif_config_format(struct channel_obj *ch)
 609 {
 610         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 611
 612         common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
 613         if (config_params.numbuffers[ch->channel_id] == 0)
 614                 common->memory = V4L2_MEMORY_USERPTR;
 615         else
 616                 common->memory = V4L2_MEMORY_MMAP;
 617
 618         common->fmt.fmt.pix.sizeimage =
 619                         config_params.channel_bufsize[ch->channel_id];
 620         common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 621         common->fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 622 }
 623
 624 static int vpif_check_format(struct channel_obj *ch,
 625                              struct v4l2_pix_format *pixfmt)
 626 {
 627         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 628         enum v4l2_field field = pixfmt->field;
 629         u32 sizeimage, hpitch, vpitch;
 630
 631         if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
 632                 goto invalid_fmt_exit;
 633
 634         if (!(VPIF_VALID_FIELD(field)))
 635                 goto invalid_fmt_exit;
 636
 637         if (pixfmt->bytesperline <= 0)
 638                 goto invalid_pitch_exit;
 639
 640         sizeimage = pixfmt->sizeimage;
 641
 642         if (vpif_update_resolution(ch))
 643                 return -EINVAL;
 644
 645         hpitch = pixfmt->bytesperline;
 646         vpitch = sizeimage / (hpitch * 2);
 647
 648         /* Check for valid value of pitch */
 649         if ((hpitch < ch->vpifparams.std_info.width) ||
 650             (vpitch < ch->vpifparams.std_info.height))
 651                 goto invalid_pitch_exit;
 652
 653         /* Check for 8 byte alignment */
 654         if (!ISALIGNED(hpitch)) {
 655                 vpif_err("invalid pitch alignment\n");
 656                 return -EINVAL;
 657         }
 658         pixfmt->width = common->fmt.fmt.pix.width;
 659         pixfmt->height = common->fmt.fmt.pix.height;
 660
 661         return 0;
 662
 663 invalid_fmt_exit:
 664         vpif_err("invalid field format\n");
 665         return -EINVAL;
 666
 667 invalid_pitch_exit:
 668         vpif_err("invalid pitch\n");
 669         return -EINVAL;
 670 }
 671
 672 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 673 {
 674         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 675
 676         if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
 677                 common->set_addr = ch3_set_videobuf_addr;
 678         } else {
 679                 if (2 == muxmode)
 680                         common->set_addr = ch2_set_videobuf_addr_yc_nmux;
 681                 else
 682                         common->set_addr = ch2_set_videobuf_addr;
 683         }
 684 }
 685
 686 /*
 687  * vpif_mmap: It is used to map kernel space buffers into user spaces
 688  */
 689 static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
 690 {
 691         struct vpif_fh *fh = filep->private_data;
 692         struct channel_obj *ch = fh->channel;
 693         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 694
 695         vpif_dbg(2, debug, "vpif_mmap\n");
 696
 697         return vb2_mmap(&common->buffer_queue, vma);
 698 }
 699
 700 /*
 701  * vpif_poll: It is used for select/poll system call
 702  */
 703 static unsigned int vpif_poll(struct file *filep, poll_table *wait)
 704 {
 705         struct vpif_fh *fh = filep->private_data;
 706         struct channel_obj *ch = fh->channel;
 707         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 708
 709         if (common->started)
 710                 return vb2_poll(&common->buffer_queue, filep, wait);
 711
 712         return 0;
 713 }
 714
 715 /*
 716  * vpif_open: It creates object of file handle structure and stores it in
 717  * private_data member of filepointer
 718  */
 719 static int vpif_open(struct file *filep)
 720 {
 721         struct video_device *vdev = video_devdata(filep);
 722         struct channel_obj *ch = NULL;
 723         struct vpif_fh *fh = NULL;
 724
 725         ch = video_get_drvdata(vdev);
 726         /* Allocate memory for the file handle object */
 727         fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL);
 728         if (fh == NULL) {
 729                 vpif_err("unable to allocate memory for file handle object\n");
 730                 return -ENOMEM;
 731         }
 732
 733         /* store pointer to fh in private_data member of filep */
 734         filep->private_data = fh;
 735         fh->channel = ch;
 736         fh->initialized = 0;
 737         if (!ch->initialized) {
 738                 fh->initialized = 1;
 739                 ch->initialized = 1;
 740                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
 741         }
 742
 743         /* Increment channel usrs counter */
 744         atomic_inc(&ch->usrs);
 745         /* Set io_allowed[VPIF_VIDEO_INDEX] member to false */
 746         fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
 747         /* Initialize priority of this instance to default priority */
 748         fh->prio = V4L2_PRIORITY_UNSET;
 749         v4l2_prio_open(&ch->prio, &fh->prio);
 750
 751         return 0;
 752 }
 753
 754 /*
 755  * vpif_release: This function deletes buffer queue, frees the buffers and
 756  * the vpif file handle
 757  */
 758 static int vpif_release(struct file *filep)
 759 {
 760         struct vpif_fh *fh = filep->private_data;
 761         struct channel_obj *ch = fh->channel;
 762         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 763
 764         /* if this instance is doing IO */
 765         if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
 766                 /* Reset io_usrs member of channel object */
 767                 common->io_usrs = 0;
 768                 /* Disable channel */
 769                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 770                         enable_channel2(0);
 771                         channel2_intr_enable(0);
 772                 }
 773                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
 774                     (2 == common->started)) {
 775                         enable_channel3(0);
 776                         channel3_intr_enable(0);
 777                 }
 778                 common->started = 0;
 779
 780                 /* Free buffers allocated */
 781                 vb2_queue_release(&common->buffer_queue);
 782                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
 783
 784                 common->numbuffers =
 785                     config_params.numbuffers[ch->channel_id];
 786         }
 787
 788         /* Decrement channel usrs counter */
 789         atomic_dec(&ch->usrs);
 790         /* If this file handle has initialize encoder device, reset it */
 791         if (fh->initialized)
 792                 ch->initialized = 0;
 793
 794         /* Close the priority */
 795         v4l2_prio_close(&ch->prio, fh->prio);
 796         filep->private_data = NULL;
 797         fh->initialized = 0;
 798         kfree(fh);
 799
 800         return 0;
 801 }
 802
 803 /* functions implementing ioctls */
 804 /**
 805  * vpif_querycap() - QUERYCAP handler
 806  * @file: file ptr
 807  * @priv: file handle
 808  * @cap: ptr to v4l2_capability structure
 809  */
 810 static int vpif_querycap(struct file *file, void  *priv,
 811                                 struct v4l2_capability *cap)
 812 {
 813         struct vpif_display_config *config = vpif_dev->platform_data;
 814
 815         cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 816         strlcpy(cap->driver, "vpif display", sizeof(cap->driver));
 817         strlcpy(cap->bus_info, "Platform", sizeof(cap->bus_info));
 818         strlcpy(cap->card, config->card_name, sizeof(cap->card));
 819
 820         return 0;
 821 }
 822
 823 static int vpif_enum_fmt_vid_out(struct file *file, void  *priv,
 824                                         struct v4l2_fmtdesc *fmt)
 825 {
 826         if (fmt->index != 0) {
 827                 vpif_err("Invalid format index\n");
 828                 return -EINVAL;
 829         }
 830
 831         /* Fill in the information about format */
 832         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 833         strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
 834         fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 835
 836         return 0;
 837 }
 838
 839 static int vpif_g_fmt_vid_out(struct file *file, void *priv,
 840                                 struct v4l2_format *fmt)
 841 {
 842         struct vpif_fh *fh = priv;
 843         struct channel_obj *ch = fh->channel;
 844         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 845
 846         /* Check the validity of the buffer type */
 847         if (common->fmt.type != fmt->type)
 848                 return -EINVAL;
 849
 850         if (vpif_update_resolution(ch))
 851                 return -EINVAL;
 852         *fmt = common->fmt;
 853         return 0;
 854 }
 855
 856 static int vpif_s_fmt_vid_out(struct file *file, void *priv,
 857                                 struct v4l2_format *fmt)
 858 {
 859         struct vpif_fh *fh = priv;
 860         struct v4l2_pix_format *pixfmt;
 861         struct channel_obj *ch = fh->channel;
 862         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 863         int ret = 0;
 864
 865         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 866             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 867                 if (!fh->initialized) {
 868                         vpif_dbg(1, debug, "Channel Busy\n");
 869                         return -EBUSY;
 870                 }
 871
 872                 /* Check for the priority */
 873                 ret = v4l2_prio_check(&ch->prio, fh->prio);
 874                 if (0 != ret)
 875                         return ret;
 876                 fh->initialized = 1;
 877         }
 878
 879         if (common->started) {
 880                 vpif_dbg(1, debug, "Streaming in progress\n");
 881                 return -EBUSY;
 882         }
 883
 884         pixfmt = &fmt->fmt.pix;
 885         /* Check for valid field format */
 886         ret = vpif_check_format(ch, pixfmt);
 887         if (ret)
 888                 return ret;
 889
 890         /* store the pix format in the channel object */
 891         common->fmt.fmt.pix = *pixfmt;
 892         /* store the format in the channel object */
 893         common->fmt = *fmt;
 894         return 0;
 895 }
 896
 897 static int vpif_try_fmt_vid_out(struct file *file, void *priv,
 898                                 struct v4l2_format *fmt)
 899 {
 900         struct vpif_fh *fh = priv;
 901         struct channel_obj *ch = fh->channel;
 902         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 903         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 904         int ret = 0;
 905
 906         ret = vpif_check_format(ch, pixfmt);
 907         if (ret) {
 908                 *pixfmt = common->fmt.fmt.pix;
 909                 pixfmt->sizeimage = pixfmt->width * pixfmt->height * 2;
 910         }
 911
 912         return ret;
 913 }
 914
 915 static int vpif_reqbufs(struct file *file, void *priv,
 916                         struct v4l2_requestbuffers *reqbuf)
 917 {
 918         struct vpif_fh *fh = priv;
 919         struct channel_obj *ch = fh->channel;
 920         struct common_obj *common;
 921         enum v4l2_field field;
 922         struct vb2_queue *q;
 923         u8 index = 0;
 924
 925         /* This file handle has not initialized the channel,
 926            It is not allowed to do settings */
 927         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 928             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 929                 if (!fh->initialized) {
 930                         vpif_err("Channel Busy\n");
 931                         return -EBUSY;
 932                 }
 933         }
 934
 935         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != reqbuf->type)
 936                 return -EINVAL;
 937
 938         index = VPIF_VIDEO_INDEX;
 939
 940         common = &ch->common[index];
 941
 942         if (common->fmt.type != reqbuf->type || !vpif_dev)
 943                 return -EINVAL;
 944         if (0 != common->io_usrs)
 945                 return -EBUSY;
 946
 947         if (reqbuf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 948                 if (common->fmt.fmt.pix.field == V4L2_FIELD_ANY)
 949                         field = V4L2_FIELD_INTERLACED;
 950                 else
 951                         field = common->fmt.fmt.pix.field;
 952         } else {
 953                 field = V4L2_VBI_INTERLACED;
 954         }
 955         /* Initialize videobuf2 queue as per the buffer type */
 956         common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
 957         if (!common->alloc_ctx) {
 958                 vpif_err("Failed to get the context\n");
 959                 return -EINVAL;
 960         }
 961         q = &common->buffer_queue;
 962         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 963         q->io_modes = VB2_MMAP | VB2_USERPTR;
 964         q->drv_priv = fh;
 965         q->ops = &video_qops;
 966         q->mem_ops = &vb2_dma_contig_memops;
 967         q->buf_struct_size = sizeof(struct vpif_disp_buffer);
 968
 969         vb2_queue_init(q);
 970
 971         /* Set io allowed member of file handle to TRUE */
 972         fh->io_allowed[index] = 1;
 973         /* Increment io usrs member of channel object to 1 */
 974         common->io_usrs = 1;
 975         /* Store type of memory requested in channel object */
 976         common->memory = reqbuf->memory;
 977         INIT_LIST_HEAD(&common->dma_queue);
 978         /* Allocate buffers */
 979         return vb2_reqbufs(&common->buffer_queue, reqbuf);
 980 }
 981
 982 static int vpif_querybuf(struct file *file, void *priv,
 983                                 struct v4l2_buffer *tbuf)
 984 {
 985         struct vpif_fh *fh = priv;
 986         struct channel_obj *ch = fh->channel;
 987         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 988
 989         if (common->fmt.type != tbuf->type)
 990                 return -EINVAL;
 991
 992         return vb2_querybuf(&common->buffer_queue, tbuf);
 993 }
 994
 995 static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
 996 {
 997         struct vpif_fh *fh = NULL;
 998         struct channel_obj *ch = NULL;
 999         struct common_obj *common = NULL;
1000
1001         if (!buf || !priv)
1002                 return -EINVAL;
1003
1004         fh = priv;
1005         ch = fh->channel;
1006         if (!ch)
1007                 return -EINVAL;
1008
1009         common = &(ch->common[VPIF_VIDEO_INDEX]);
1010         if (common->fmt.type != buf->type)
1011                 return -EINVAL;
1012
1013         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1014                 vpif_err("fh->io_allowed\n");
1015                 return -EACCES;
1016         }
1017
1018         return vb2_qbuf(&common->buffer_queue, buf);
1019 }
1020
1021 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
1022 {
1023         struct vpif_fh *fh = priv;
1024         struct channel_obj *ch = fh->channel;
1025         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1026         int ret = 0;
1027
1028         if (!(*std_id & VPIF_V4L2_STD))
1029                 return -EINVAL;
1030
1031         if (common->started) {
1032                 vpif_err("streaming in progress\n");
1033                 return -EBUSY;
1034         }
1035
1036         /* Call encoder subdevice function to set the standard */
1037         ch->video.stdid = *std_id;
1038         ch->video.dv_preset = V4L2_DV_INVALID;
1039         memset(&ch->video.bt_timings, 0, sizeof(ch->video.bt_timings));
1040
1041         /* Get the information about the standard */
1042         if (vpif_update_resolution(ch))
1043                 return -EINVAL;
1044
1045         if ((ch->vpifparams.std_info.width *
1046                 ch->vpifparams.std_info.height * 2) >
1047                 config_params.channel_bufsize[ch->channel_id]) {
1048                 vpif_err("invalid std for this size\n");
1049                 return -EINVAL;
1050         }
1051
1052         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
1053         /* Configure the default format information */
1054         vpif_config_format(ch);
1055
1056         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
1057                                                 s_std_output, *std_id);
1058         if (ret < 0) {
1059                 vpif_err("Failed to set output standard\n");
1060                 return ret;
1061         }
1062
1063         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, core,
1064                                                         s_std, *std_id);
1065         if (ret < 0)
1066                 vpif_err("Failed to set standard for sub devices\n");
1067         return ret;
1068 }
1069
1070 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1071 {
1072         struct vpif_fh *fh = priv;
1073         struct channel_obj *ch = fh->channel;
1074
1075         *std = ch->video.stdid;
1076         return 0;
1077 }
1078
1079 static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
1080 {
1081         struct vpif_fh *fh = priv;
1082         struct channel_obj *ch = fh->channel;
1083         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1084
1085         return vb2_dqbuf(&common->buffer_queue, p,
1086                                         (file->f_flags & O_NONBLOCK));
1087 }
1088
1089 static int vpif_streamon(struct file *file, void *priv,
1090                                 enum v4l2_buf_type buftype)
1091 {
1092         struct vpif_fh *fh = priv;
1093         struct channel_obj *ch = fh->channel;
1094         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1095         struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1096         int ret = 0;
1097
1098         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1099                 vpif_err("buffer type not supported\n");
1100                 return -EINVAL;
1101         }
1102
1103         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1104                 vpif_err("fh->io_allowed\n");
1105                 return -EACCES;
1106         }
1107
1108         /* If Streaming is already started, return error */
1109         if (common->started) {
1110                 vpif_err("channel->started\n");
1111                 return -EBUSY;
1112         }
1113
1114         if ((ch->channel_id == VPIF_CHANNEL2_VIDEO
1115                 && oth_ch->common[VPIF_VIDEO_INDEX].started &&
1116                 ch->vpifparams.std_info.ycmux_mode == 0)
1117                 || ((ch->channel_id == VPIF_CHANNEL3_VIDEO)
1118                 && (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1119                 vpif_err("other channel is using\n");
1120                 return -EBUSY;
1121         }
1122
1123         ret = vpif_check_format(ch, &common->fmt.fmt.pix);
1124         if (ret < 0)
1125                 return ret;
1126
1127         /* Call vb2_streamon to start streaming in videobuf2 */
1128         ret = vb2_streamon(&common->buffer_queue, buftype);
1129         if (ret < 0) {
1130                 vpif_err("vb2_streamon\n");
1131                 return ret;
1132         }
1133
1134         return ret;
1135 }
1136
1137 static int vpif_streamoff(struct file *file, void *priv,
1138                                 enum v4l2_buf_type buftype)
1139 {
1140         struct vpif_fh *fh = priv;
1141         struct channel_obj *ch = fh->channel;
1142         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1143
1144         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1145                 vpif_err("buffer type not supported\n");
1146                 return -EINVAL;
1147         }
1148
1149         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1150                 vpif_err("fh->io_allowed\n");
1151                 return -EACCES;
1152         }
1153
1154         if (!common->started) {
1155                 vpif_err("channel->started\n");
1156                 return -EINVAL;
1157         }
1158
1159         if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1160                 /* disable channel */
1161                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
1162                         enable_channel2(0);
1163                         channel2_intr_enable(0);
1164                 }
1165                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
1166                                         (2 == common->started)) {
1167                         enable_channel3(0);
1168                         channel3_intr_enable(0);
1169                 }
1170         }
1171
1172         common->started = 0;
1173         return vb2_streamoff(&common->buffer_queue, buftype);
1174 }
1175
1176 static int vpif_cropcap(struct file *file, void *priv,
1177                         struct v4l2_cropcap *crop)
1178 {
1179         struct vpif_fh *fh = priv;
1180         struct channel_obj *ch = fh->channel;
1181         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1182         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != crop->type)
1183                 return -EINVAL;
1184
1185         crop->bounds.left = crop->bounds.top = 0;
1186         crop->defrect.left = crop->defrect.top = 0;
1187         crop->defrect.height = crop->bounds.height = common->height;
1188         crop->defrect.width = crop->bounds.width = common->width;
1189
1190         return 0;
1191 }
1192
1193 static int vpif_enum_output(struct file *file, void *fh,
1194                                 struct v4l2_output *output)
1195 {
1196
1197         struct vpif_display_config *config = vpif_dev->platform_data;
1198
1199         if (output->index >= config->output_count) {
1200                 vpif_dbg(1, debug, "Invalid output index\n");
1201                 return -EINVAL;
1202         }
1203
1204         strcpy(output->name, config->output[output->index]);
1205         output->type = V4L2_OUTPUT_TYPE_ANALOG;
1206         output->std = VPIF_V4L2_STD;
1207
1208         return 0;
1209 }
1210
1211 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
1212 {
1213         struct vpif_fh *fh = priv;
1214         struct channel_obj *ch = fh->channel;
1215         struct video_obj *vid_ch = &ch->video;
1216         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1217         int ret = 0;
1218
1219         if (common->started) {
1220                 vpif_err("Streaming in progress\n");
1221                 return -EBUSY;
1222         }
1223
1224         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
1225                                                         s_routing, 0, i, 0);
1226
1227         if (ret < 0)
1228                 vpif_err("Failed to set output standard\n");
1229
1230         vid_ch->output_id = i;
1231         return ret;
1232 }
1233
1234 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
1235 {
1236         struct vpif_fh *fh = priv;
1237         struct channel_obj *ch = fh->channel;
1238         struct video_obj *vid_ch = &ch->video;
1239
1240         *i = vid_ch->output_id;
1241
1242         return 0;
1243 }
1244
1245 static int vpif_g_priority(struct file *file, void *priv, enum v4l2_priority *p)
1246 {
1247         struct vpif_fh *fh = priv;
1248         struct channel_obj *ch = fh->channel;
1249
1250         *p = v4l2_prio_max(&ch->prio);
1251
1252         return 0;
1253 }
1254
1255 static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1256 {
1257         struct vpif_fh *fh = priv;
1258         struct channel_obj *ch = fh->channel;
1259
1260         return v4l2_prio_change(&ch->prio, &fh->prio, p);
1261 }
1262
1263 /**
1264  * vpif_enum_dv_presets() - ENUM_DV_PRESETS handler
1265  * @file: file ptr
1266  * @priv: file handle
1267  * @preset: input preset
1268  */
1269 static int vpif_enum_dv_presets(struct file *file, void *priv,
1270                 struct v4l2_dv_enum_preset *preset)
1271 {
1272         struct vpif_fh *fh = priv;
1273         struct channel_obj *ch = fh->channel;
1274         struct video_obj *vid_ch = &ch->video;
1275
1276         return v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id],
1277                         video, enum_dv_presets, preset);
1278 }
1279
1280 /**
1281  * vpif_s_dv_presets() - S_DV_PRESETS handler
1282  * @file: file ptr
1283  * @priv: file handle
1284  * @preset: input preset
1285  */
1286 static int vpif_s_dv_preset(struct file *file, void *priv,
1287                 struct v4l2_dv_preset *preset)
1288 {
1289         struct vpif_fh *fh = priv;
1290         struct channel_obj *ch = fh->channel;
1291         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1292         struct video_obj *vid_ch = &ch->video;
1293         int ret = 0;
1294
1295         if (common->started) {
1296                 vpif_dbg(1, debug, "streaming in progress\n");
1297                 return -EBUSY;
1298         }
1299
1300         ret = v4l2_prio_check(&ch->prio, fh->prio);
1301         if (ret != 0)
1302                 return ret;
1303
1304         fh->initialized = 1;
1305
1306         /* Call encoder subdevice function to set the standard */
1307         if (mutex_lock_interruptible(&common->lock))
1308                 return -ERESTARTSYS;
1309
1310         ch->video.dv_preset = preset->preset;
1311         ch->video.stdid = V4L2_STD_UNKNOWN;
1312         memset(&ch->video.bt_timings, 0, sizeof(ch->video.bt_timings));
1313
1314         /* Get the information about the standard */
1315         if (vpif_update_resolution(ch)) {
1316                 ret = -EINVAL;
1317         } else {
1318                 /* Configure the default format information */
1319                 vpif_config_format(ch);
1320
1321                 ret = v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id],
1322                                 video, s_dv_preset, preset);
1323         }
1324
1325         mutex_unlock(&common->lock);
1326
1327         return ret;
1328 }
1329 /**
1330  * vpif_g_dv_presets() - G_DV_PRESETS handler
1331  * @file: file ptr
1332  * @priv: file handle
1333  * @preset: input preset
1334  */
1335 static int vpif_g_dv_preset(struct file *file, void *priv,
1336                 struct v4l2_dv_preset *preset)
1337 {
1338         struct vpif_fh *fh = priv;
1339         struct channel_obj *ch = fh->channel;
1340
1341         preset->preset = ch->video.dv_preset;
1342
1343         return 0;
1344 }
1345 /**
1346  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1347  * @file: file ptr
1348  * @priv: file handle
1349  * @timings: digital video timings
1350  */
1351 static int vpif_s_dv_timings(struct file *file, void *priv,
1352                 struct v4l2_dv_timings *timings)
1353 {
1354         struct vpif_fh *fh = priv;
1355         struct channel_obj *ch = fh->channel;
1356         struct vpif_params *vpifparams = &ch->vpifparams;
1357         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1358         struct video_obj *vid_ch = &ch->video;
1359         struct v4l2_bt_timings *bt = &vid_ch->bt_timings;
1360         int ret;
1361
1362         if (timings->type != V4L2_DV_BT_656_1120) {
1363                 vpif_dbg(2, debug, "Timing type not defined\n");
1364                 return -EINVAL;
1365         }
1366
1367         /* Configure subdevice timings, if any */
1368         ret = v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id],
1369                         video, s_dv_timings, timings);
1370         if (ret == -ENOIOCTLCMD) {
1371                 vpif_dbg(2, debug, "Custom DV timings not supported by "
1372                                 "subdevice\n");
1373                 return -EINVAL;
1374         }
1375         if (ret < 0) {
1376                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1377                 return ret;
1378         }
1379
1380         if (!(timings->bt.width && timings->bt.height &&
1381                                 (timings->bt.hbackporch ||
1382                                  timings->bt.hfrontporch ||
1383                                  timings->bt.hsync) &&
1384                                 timings->bt.vfrontporch &&
1385                                 (timings->bt.vbackporch ||
1386                                  timings->bt.vsync))) {
1387                 vpif_dbg(2, debug, "Timings for width, height, "
1388                                 "horizontal back porch, horizontal sync, "
1389                                 "horizontal front porch, vertical back porch, "
1390                                 "vertical sync and vertical back porch "
1391                                 "must be defined\n");
1392                 return -EINVAL;
1393         }
1394
1395         *bt = timings->bt;
1396
1397         /* Configure video port timings */
1398
1399         std_info->eav2sav = bt->hbackporch + bt->hfrontporch +
1400                 bt->hsync - 8;
1401         std_info->sav2eav = bt->width;
1402
1403         std_info->l1 = 1;
1404         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1405
1406         if (bt->interlaced) {
1407                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1408                         std_info->vsize = bt->height * 2 +
1409                                 bt->vfrontporch + bt->vsync + bt->vbackporch +
1410                                 bt->il_vfrontporch + bt->il_vsync +
1411                                 bt->il_vbackporch;
1412                         std_info->l5 = std_info->vsize/2 -
1413                                 (bt->vfrontporch - 1);
1414                         std_info->l7 = std_info->vsize/2 + 1;
1415                         std_info->l9 = std_info->l7 + bt->il_vsync +
1416                                 bt->il_vbackporch + 1;
1417                         std_info->l11 = std_info->vsize -
1418                                 (bt->il_vfrontporch - 1);
1419                 } else {
1420                         vpif_dbg(2, debug, "Required timing values for "
1421                                         "interlaced BT format missing\n");
1422                         return -EINVAL;
1423                 }
1424         } else {
1425                 std_info->vsize = bt->height + bt->vfrontporch +
1426                         bt->vsync + bt->vbackporch;
1427                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1428         }
1429         strncpy(std_info->name, "Custom timings BT656/1120",
1430                         VPIF_MAX_NAME);
1431         std_info->width = bt->width;
1432         std_info->height = bt->height;
1433         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1434         std_info->ycmux_mode = 0;
1435         std_info->capture_format = 0;
1436         std_info->vbi_supported = 0;
1437         std_info->hd_sd = 1;
1438         std_info->stdid = 0;
1439         std_info->dv_preset = V4L2_DV_INVALID;
1440
1441         vid_ch->stdid = 0;
1442         vid_ch->dv_preset = V4L2_DV_INVALID;
1443
1444         return 0;
1445 }
1446
1447 /**
1448  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1449  * @file: file ptr
1450  * @priv: file handle
1451  * @timings: digital video timings
1452  */
1453 static int vpif_g_dv_timings(struct file *file, void *priv,
1454                 struct v4l2_dv_timings *timings)
1455 {
1456         struct vpif_fh *fh = priv;
1457         struct channel_obj *ch = fh->channel;
1458         struct video_obj *vid_ch = &ch->video;
1459         struct v4l2_bt_timings *bt = &vid_ch->bt_timings;
1460
1461         timings->bt = *bt;
1462
1463         return 0;
1464 }
1465
1466 /*
1467  * vpif_g_chip_ident() - Identify the chip
1468  * @file: file ptr
1469  * @priv: file handle
1470  * @chip: chip identity
1471  *
1472  * Returns zero or -EINVAL if read operations fails.
1473  */
1474 static int vpif_g_chip_ident(struct file *file, void *priv,
1475                 struct v4l2_dbg_chip_ident *chip)
1476 {
1477         chip->ident = V4L2_IDENT_NONE;
1478         chip->revision = 0;
1479         if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
1480                         chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR) {
1481                 vpif_dbg(2, debug, "match_type is invalid.\n");
1482                 return -EINVAL;
1483         }
1484
1485         return v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 0, core,
1486                         g_chip_ident, chip);
1487 }
1488
1489 #ifdef CONFIG_VIDEO_ADV_DEBUG
1490 /*
1491  * vpif_dbg_g_register() - Read register
1492  * @file: file ptr
1493  * @priv: file handle
1494  * @reg: register to be read
1495  *
1496  * Debugging only
1497  * Returns zero or -EINVAL if read operations fails.
1498  */
1499 static int vpif_dbg_g_register(struct file *file, void *priv,
1500                 struct v4l2_dbg_register *reg){
1501         struct vpif_fh *fh = priv;
1502         struct channel_obj *ch = fh->channel;
1503         struct video_obj *vid_ch = &ch->video;
1504
1505         return v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id], core,
1506                         g_register, reg);
1507 }
1508
1509 /*
1510  * vpif_dbg_s_register() - Write to register
1511  * @file: file ptr
1512  * @priv: file handle
1513  * @reg: register to be modified
1514  *
1515  * Debugging only
1516  * Returns zero or -EINVAL if write operations fails.
1517  */
1518 static int vpif_dbg_s_register(struct file *file, void *priv,
1519                 struct v4l2_dbg_register *reg){
1520         struct vpif_fh *fh = priv;
1521         struct channel_obj *ch = fh->channel;
1522         struct video_obj *vid_ch = &ch->video;
1523
1524         return v4l2_subdev_call(vpif_obj.sd[vid_ch->output_id], core,
1525                         s_register, reg);
1526 }
1527 #endif
1528
1529 /*
1530  * vpif_log_status() - Status information
1531  * @file: file ptr
1532  * @priv: file handle
1533  *
1534  * Returns zero.
1535  */
1536 static int vpif_log_status(struct file *filep, void *priv)
1537 {
1538         /* status for sub devices */
1539         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1540
1541         return 0;
1542 }
1543
1544 /* vpif display ioctl operations */
1545 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1546         .vidioc_querycap                = vpif_querycap,
1547         .vidioc_g_priority              = vpif_g_priority,
1548         .vidioc_s_priority              = vpif_s_priority,
1549         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1550         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1551         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1552         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1553         .vidioc_reqbufs                 = vpif_reqbufs,
1554         .vidioc_querybuf                = vpif_querybuf,
1555         .vidioc_qbuf                    = vpif_qbuf,
1556         .vidioc_dqbuf                   = vpif_dqbuf,
1557         .vidioc_streamon                = vpif_streamon,
1558         .vidioc_streamoff               = vpif_streamoff,
1559         .vidioc_s_std                   = vpif_s_std,
1560         .vidioc_g_std                   = vpif_g_std,
1561         .vidioc_enum_output             = vpif_enum_output,
1562         .vidioc_s_output                = vpif_s_output,
1563         .vidioc_g_output                = vpif_g_output,
1564         .vidioc_cropcap                 = vpif_cropcap,
1565         .vidioc_enum_dv_presets         = vpif_enum_dv_presets,
1566         .vidioc_s_dv_preset             = vpif_s_dv_preset,
1567         .vidioc_g_dv_preset             = vpif_g_dv_preset,
1568         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1569         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1570         .vidioc_g_chip_ident            = vpif_g_chip_ident,
1571 #ifdef CONFIG_VIDEO_ADV_DEBUG
1572         .vidioc_g_register              = vpif_dbg_g_register,
1573         .vidioc_s_register              = vpif_dbg_s_register,
1574 #endif
1575         .vidioc_log_status              = vpif_log_status,
1576 };
1577
1578 static const struct v4l2_file_operations vpif_fops = {
1579         .owner          = THIS_MODULE,
1580         .open           = vpif_open,
1581         .release        = vpif_release,
1582         .unlocked_ioctl = video_ioctl2,
1583         .mmap           = vpif_mmap,
1584         .poll           = vpif_poll
1585 };
1586
1587 static struct video_device vpif_video_template = {
1588         .name           = "vpif",
1589         .fops           = &vpif_fops,
1590         .ioctl_ops      = &vpif_ioctl_ops,
1591         .tvnorms        = VPIF_V4L2_STD,
1592         .current_norm   = V4L2_STD_625_50,
1593
1594 };
1595
1596 /*Configure the channels, buffer sizei, request irq */
1597 static int initialize_vpif(void)
1598 {
1599         int free_channel_objects_index;
1600         int free_buffer_channel_index;
1601         int free_buffer_index;
1602         int err = 0, i, j;
1603
1604         /* Default number of buffers should be 3 */
1605         if ((ch2_numbuffers > 0) &&
1606             (ch2_numbuffers < config_params.min_numbuffers))
1607                 ch2_numbuffers = config_params.min_numbuffers;
1608         if ((ch3_numbuffers > 0) &&
1609             (ch3_numbuffers < config_params.min_numbuffers))
1610                 ch3_numbuffers = config_params.min_numbuffers;
1611
1612         /* Set buffer size to min buffers size if invalid buffer size is
1613          * given */
1614         if (ch2_bufsize < config_params.min_bufsize[VPIF_CHANNEL2_VIDEO])
1615                 ch2_bufsize =
1616                     config_params.min_bufsize[VPIF_CHANNEL2_VIDEO];
1617         if (ch3_bufsize < config_params.min_bufsize[VPIF_CHANNEL3_VIDEO])
1618                 ch3_bufsize =
1619                     config_params.min_bufsize[VPIF_CHANNEL3_VIDEO];
1620
1621         config_params.numbuffers[VPIF_CHANNEL2_VIDEO] = ch2_numbuffers;
1622
1623         if (ch2_numbuffers) {
1624                 config_params.channel_bufsize[VPIF_CHANNEL2_VIDEO] =
1625                                                         ch2_bufsize;
1626         }
1627         config_params.numbuffers[VPIF_CHANNEL3_VIDEO] = ch3_numbuffers;
1628
1629         if (ch3_numbuffers) {
1630                 config_params.channel_bufsize[VPIF_CHANNEL3_VIDEO] =
1631                                                         ch3_bufsize;
1632         }
1633
1634         /* Allocate memory for six channel objects */
1635         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1636                 vpif_obj.dev[i] =
1637                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1638                 /* If memory allocation fails, return error */
1639                 if (!vpif_obj.dev[i]) {
1640                         free_channel_objects_index = i;
1641                         err = -ENOMEM;
1642                         goto vpif_init_free_channel_objects;
1643                 }
1644         }
1645
1646         free_channel_objects_index = VPIF_DISPLAY_MAX_DEVICES;
1647         free_buffer_channel_index = VPIF_DISPLAY_NUM_CHANNELS;
1648         free_buffer_index = config_params.numbuffers[i - 1];
1649
1650         return 0;
1651
1652 vpif_init_free_channel_objects:
1653         for (j = 0; j < free_channel_objects_index; j++)
1654                 kfree(vpif_obj.dev[j]);
1655         return err;
1656 }
1657
1658 /*
1659  * vpif_probe: This function creates device entries by register itself to the
1660  * V4L2 driver and initializes fields of each channel objects
1661  */
1662 static __init int vpif_probe(struct platform_device *pdev)
1663 {
1664         struct vpif_subdev_info *subdevdata;
1665         struct vpif_display_config *config;
1666         int i, j = 0, k, q, m, err = 0;
1667         struct i2c_adapter *i2c_adap;
1668         struct common_obj *common;
1669         struct channel_obj *ch;
1670         struct video_device *vfd;
1671         struct resource *res;
1672         int subdev_count;
1673         size_t size;
1674
1675         vpif_dev = &pdev->dev;
1676         err = initialize_vpif();
1677
1678         if (err) {
1679                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1680                 return err;
1681         }
1682
1683         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1684         if (err) {
1685                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1686                 return err;
1687         }
1688
1689         k = 0;
1690         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) {
1691                 for (i = res->start; i <= res->end; i++) {
1692                         if (request_irq(i, vpif_channel_isr, IRQF_SHARED,
1693                                         "VPIF_Display",
1694                                 (void *)(&vpif_obj.dev[k]->channel_id))) {
1695                                 err = -EBUSY;
1696                                 goto vpif_int_err;
1697                         }
1698                 }
1699                 k++;
1700         }
1701
1702         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1703
1704                 /* Get the pointer to the channel object */
1705                 ch = vpif_obj.dev[i];
1706
1707                 /* Allocate memory for video device */
1708                 vfd = video_device_alloc();
1709                 if (vfd == NULL) {
1710                         for (j = 0; j < i; j++) {
1711                                 ch = vpif_obj.dev[j];
1712                                 video_device_release(ch->video_dev);
1713                         }
1714                         err = -ENOMEM;
1715                         goto vpif_int_err;
1716                 }
1717
1718                 /* Initialize field of video device */
1719                 *vfd = vpif_video_template;
1720                 vfd->v4l2_dev = &vpif_obj.v4l2_dev;
1721                 vfd->release = video_device_release;
1722                 snprintf(vfd->name, sizeof(vfd->name),
1723                          "VPIF_Display_DRIVER_V%s",
1724                          VPIF_DISPLAY_VERSION);
1725
1726                 /* Set video_dev to the video device */
1727                 ch->video_dev = vfd;
1728         }
1729
1730         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1731         if (res) {
1732                 size = resource_size(res);
1733                 /* The resources are divided into two equal memory and when
1734                  * we have HD output we can add them together
1735                  */
1736                 for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1737                         ch = vpif_obj.dev[j];
1738                         ch->channel_id = j;
1739
1740                         /* only enabled if second resource exists */
1741                         config_params.video_limit[ch->channel_id] = 0;
1742                         if (size)
1743                                 config_params.video_limit[ch->channel_id] =
1744                                                                         size/2;
1745                 }
1746         }
1747
1748         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1749                 ch = vpif_obj.dev[j];
1750                 /* Initialize field of the channel objects */
1751                 atomic_set(&ch->usrs, 0);
1752                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1753                         ch->common[k].numbuffers = 0;
1754                         common = &ch->common[k];
1755                         common->io_usrs = 0;
1756                         common->started = 0;
1757                         spin_lock_init(&common->irqlock);
1758                         mutex_init(&common->lock);
1759                         common->numbuffers = 0;
1760                         common->set_addr = NULL;
1761                         common->ytop_off = common->ybtm_off = 0;
1762                         common->ctop_off = common->cbtm_off = 0;
1763                         common->cur_frm = common->next_frm = NULL;
1764                         memset(&common->fmt, 0, sizeof(common->fmt));
1765                         common->numbuffers = config_params.numbuffers[k];
1766
1767                 }
1768                 ch->initialized = 0;
1769                 ch->channel_id = j;
1770                 if (j < 2)
1771                         ch->common[VPIF_VIDEO_INDEX].numbuffers =
1772                             config_params.numbuffers[ch->channel_id];
1773                 else
1774                         ch->common[VPIF_VIDEO_INDEX].numbuffers = 0;
1775
1776                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1777
1778                 /* Initialize prio member of channel object */
1779                 v4l2_prio_init(&ch->prio);
1780                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1781                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1782                 /* Locking in file operations other than ioctl should be done
1783                    by the driver, not the V4L2 core.
1784                    This driver needs auditing so that this flag can be removed. */
1785                 set_bit(V4L2_FL_LOCK_ALL_FOPS, &ch->video_dev->flags);
1786                 ch->video_dev->lock = &common->lock;
1787
1788                 /* register video device */
1789                 vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
1790                                 (int)ch, (int)&ch->video_dev);
1791
1792                 err = video_register_device(ch->video_dev,
1793                                           VFL_TYPE_GRABBER, (j ? 3 : 2));
1794                 if (err < 0)
1795                         goto probe_out;
1796
1797                 video_set_drvdata(ch->video_dev, ch);
1798         }
1799
1800         i2c_adap = i2c_get_adapter(1);
1801         config = pdev->dev.platform_data;
1802         subdev_count = config->subdev_count;
1803         subdevdata = config->subdevinfo;
1804         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1805                                                                 GFP_KERNEL);
1806         if (vpif_obj.sd == NULL) {
1807                 vpif_err("unable to allocate memory for subdevice pointers\n");
1808                 err = -ENOMEM;
1809                 goto probe_out;
1810         }
1811
1812         for (i = 0; i < subdev_count; i++) {
1813                 vpif_obj.sd[i] = v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1814                                                 i2c_adap,
1815                                                 &subdevdata[i].board_info,
1816                                                 NULL);
1817                 if (!vpif_obj.sd[i]) {
1818                         vpif_err("Error registering v4l2 subdevice\n");
1819                         goto probe_subdev_out;
1820                 }
1821
1822                 if (vpif_obj.sd[i])
1823                         vpif_obj.sd[i]->grp_id = 1 << i;
1824         }
1825
1826         v4l2_info(&vpif_obj.v4l2_dev,
1827                         " VPIF display driver initialized\n");
1828         return 0;
1829
1830 probe_subdev_out:
1831         kfree(vpif_obj.sd);
1832 probe_out:
1833         for (k = 0; k < j; k++) {
1834                 ch = vpif_obj.dev[k];
1835                 video_unregister_device(ch->video_dev);
1836                 video_device_release(ch->video_dev);
1837                 ch->video_dev = NULL;
1838         }
1839 vpif_int_err:
1840         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1841         vpif_err("VPIF IRQ request failed\n");
1842         for (q = k; k >= 0; k--) {
1843                 for (m = i; m >= res->start; m--)
1844                         free_irq(m, (void *)(&vpif_obj.dev[k]->channel_id));
1845                 res = platform_get_resource(pdev, IORESOURCE_IRQ, k-1);
1846                 m = res->end;
1847         }
1848
1849         return err;
1850 }
1851
1852 /*
1853  * vpif_remove: It un-register channels from V4L2 driver
1854  */
1855 static int vpif_remove(struct platform_device *device)
1856 {
1857         struct channel_obj *ch;
1858         int i;
1859
1860         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1861
1862         /* un-register device */
1863         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1864                 /* Get the pointer to the channel object */
1865                 ch = vpif_obj.dev[i];
1866                 /* Unregister video device */
1867                 video_unregister_device(ch->video_dev);
1868
1869                 ch->video_dev = NULL;
1870         }
1871
1872         return 0;
1873 }
1874
1875 static __refdata struct platform_driver vpif_driver = {
1876         .driver = {
1877                         .name   = "vpif_display",
1878                         .owner  = THIS_MODULE,
1879         },
1880         .probe  = vpif_probe,
1881         .remove = vpif_remove,
1882 };
1883
1884 static __init int vpif_init(void)
1885 {
1886         return platform_driver_register(&vpif_driver);
1887 }
1888
1889 /*
1890  * vpif_cleanup: This function un-registers device and driver to the kernel,
1891  * frees requested irq handler and de-allocates memory allocated for channel
1892  * objects.
1893  */
1894 static void vpif_cleanup(void)
1895 {
1896         struct platform_device *pdev;
1897         struct resource *res;
1898         int irq_num;
1899         int i = 0;
1900
1901         pdev = container_of(vpif_dev, struct platform_device, dev);
1902
1903         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) {
1904                 for (irq_num = res->start; irq_num <= res->end; irq_num++)
1905                         free_irq(irq_num,
1906                                  (void *)(&vpif_obj.dev[i]->channel_id));
1907                 i++;
1908         }
1909
1910         platform_driver_unregister(&vpif_driver);
1911         kfree(vpif_obj.sd);
1912         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++)
1913                 kfree(vpif_obj.dev[i]);
1914 }
1915
1916 module_init(vpif_init);
1917 module_exit(vpif_cleanup);