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/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         unsigned long flags;
 181
 182         common = &ch->common[VPIF_VIDEO_INDEX];
 183
 184         /* add the buffer to the DMA queue */
 185         spin_lock_irqsave(&common->irqlock, flags);
 186         list_add_tail(&buf->list, &common->dma_queue);
 187         spin_unlock_irqrestore(&common->irqlock, flags);
 188 }
 189
 190 /*
 191  * vpif_buf_cleanup: This function is called from the videobuf2 layer to
 192  * free memory allocated to the buffers
 193  */
 194 static void vpif_buf_cleanup(struct vb2_buffer *vb)
 195 {
 196         struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 197         struct vpif_disp_buffer *buf = container_of(vb,
 198                                         struct vpif_disp_buffer, vb);
 199         struct channel_obj *ch = fh->channel;
 200         struct common_obj *common;
 201         unsigned long flags;
 202
 203         common = &ch->common[VPIF_VIDEO_INDEX];
 204
 205         spin_lock_irqsave(&common->irqlock, flags);
 206         if (vb->state == VB2_BUF_STATE_ACTIVE)
 207                 list_del_init(&buf->list);
 208         spin_unlock_irqrestore(&common->irqlock, flags);
 209 }
 210
 211 static void vpif_wait_prepare(struct vb2_queue *vq)
 212 {
 213         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 214         struct channel_obj *ch = fh->channel;
 215         struct common_obj *common;
 216
 217         common = &ch->common[VPIF_VIDEO_INDEX];
 218         mutex_unlock(&common->lock);
 219 }
 220
 221 static void vpif_wait_finish(struct vb2_queue *vq)
 222 {
 223         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 224         struct channel_obj *ch = fh->channel;
 225         struct common_obj *common;
 226
 227         common = &ch->common[VPIF_VIDEO_INDEX];
 228         mutex_lock(&common->lock);
 229 }
 230
 231 static int vpif_buffer_init(struct vb2_buffer *vb)
 232 {
 233         struct vpif_disp_buffer *buf = container_of(vb,
 234                                         struct vpif_disp_buffer, vb);
 235
 236         INIT_LIST_HEAD(&buf->list);
 237
 238         return 0;
 239 }
 240
 241 static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
 242
 243 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 244 {
 245         struct vpif_display_config *vpif_config_data =
 246                                         vpif_dev->platform_data;
 247         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 248         struct channel_obj *ch = fh->channel;
 249         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 250         struct vpif_params *vpif = &ch->vpifparams;
 251         unsigned long addr = 0;
 252         unsigned long flags;
 253         int ret;
 254
 255         /* If buffer queue is empty, return error */
 256         spin_lock_irqsave(&common->irqlock, flags);
 257         if (list_empty(&common->dma_queue)) {
 258                 spin_unlock_irqrestore(&common->irqlock, flags);
 259                 vpif_err("buffer queue is empty\n");
 260                 return -EIO;
 261         }
 262
 263         /* Get the next frame from the buffer queue */
 264         common->next_frm = common->cur_frm =
 265                             list_entry(common->dma_queue.next,
 266                                        struct vpif_disp_buffer, list);
 267
 268         list_del(&common->cur_frm->list);
 269         spin_unlock_irqrestore(&common->irqlock, flags);
 270         /* Mark state of the current frame to active */
 271         common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 272
 273         /* Initialize field_id and started member */
 274         ch->field_id = 0;
 275         common->started = 1;
 276         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
 277         /* Calculate the offset for Y and C data  in the buffer */
 278         vpif_calculate_offsets(ch);
 279
 280         if ((ch->vpifparams.std_info.frm_fmt &&
 281                 ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE)
 282                 && (common->fmt.fmt.pix.field != V4L2_FIELD_ANY)))
 283                 || (!ch->vpifparams.std_info.frm_fmt
 284                 && (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
 285                 vpif_err("conflict in field format and std format\n");
 286                 return -EINVAL;
 287         }
 288
 289         /* clock settings */
 290         if (vpif_config_data->set_clock) {
 291                 ret = vpif_config_data->set_clock(ch->vpifparams.std_info.
 292                 ycmux_mode, ch->vpifparams.std_info.hd_sd);
 293                 if (ret < 0) {
 294                         vpif_err("can't set clock\n");
 295                         return ret;
 296                 }
 297         }
 298
 299         /* set the parameters and addresses */
 300         ret = vpif_set_video_params(vpif, ch->channel_id + 2);
 301         if (ret < 0)
 302                 return ret;
 303
 304         common->started = ret;
 305         vpif_config_addr(ch, ret);
 306         common->set_addr((addr + common->ytop_off),
 307                             (addr + common->ybtm_off),
 308                             (addr + common->ctop_off),
 309                             (addr + common->cbtm_off));
 310
 311         /* Set interrupt for both the fields in VPIF
 312             Register enable channel in VPIF register */
 313         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
 314         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 315                 channel2_intr_assert();
 316                 channel2_intr_enable(1);
 317                 enable_channel2(1);
 318                 if (vpif_config_data->chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
 319                         channel2_clipping_enable(1);
 320         }
 321
 322         if ((VPIF_CHANNEL3_VIDEO == ch->channel_id)
 323                 || (common->started == 2)) {
 324                 channel3_intr_assert();
 325                 channel3_intr_enable(1);
 326                 enable_channel3(1);
 327                 if (vpif_config_data->chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
 328                         channel3_clipping_enable(1);
 329         }
 330
 331         return 0;
 332 }
 333
 334 /* abort streaming and wait for last buffer */
 335 static int vpif_stop_streaming(struct vb2_queue *vq)
 336 {
 337         struct vpif_fh *fh = vb2_get_drv_priv(vq);
 338         struct channel_obj *ch = fh->channel;
 339         struct common_obj *common;
 340         unsigned long flags;
 341
 342         if (!vb2_is_streaming(vq))
 343                 return 0;
 344
 345         common = &ch->common[VPIF_VIDEO_INDEX];
 346
 347         /* release all active buffers */
 348         spin_lock_irqsave(&common->irqlock, flags);
 349         while (!list_empty(&common->dma_queue)) {
 350                 common->next_frm = list_entry(common->dma_queue.next,
 351                                                 struct vpif_disp_buffer, list);
 352                 list_del(&common->next_frm->list);
 353                 vb2_buffer_done(&common->next_frm->vb, VB2_BUF_STATE_ERROR);
 354         }
 355         spin_unlock_irqrestore(&common->irqlock, flags);
 356
 357         return 0;
 358 }
 359
 360 static struct vb2_ops video_qops = {
 361         .queue_setup            = vpif_buffer_queue_setup,
 362         .wait_prepare           = vpif_wait_prepare,
 363         .wait_finish            = vpif_wait_finish,
 364         .buf_init               = vpif_buffer_init,
 365         .buf_prepare            = vpif_buffer_prepare,
 366         .start_streaming        = vpif_start_streaming,
 367         .stop_streaming         = vpif_stop_streaming,
 368         .buf_cleanup            = vpif_buf_cleanup,
 369         .buf_queue              = vpif_buffer_queue,
 370 };
 371
 372 static void process_progressive_mode(struct common_obj *common)
 373 {
 374         unsigned long addr = 0;
 375
 376         spin_lock(&common->irqlock);
 377         /* Get the next buffer from buffer queue */
 378         common->next_frm = list_entry(common->dma_queue.next,
 379                                 struct vpif_disp_buffer, list);
 380         /* Remove that buffer from the buffer queue */
 381         list_del(&common->next_frm->list);
 382         spin_unlock(&common->irqlock);
 383         /* Mark status of the buffer as active */
 384         common->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 385
 386         /* Set top and bottom field addrs in VPIF registers */
 387         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb, 0);
 388         common->set_addr(addr + common->ytop_off,
 389                                  addr + common->ybtm_off,
 390                                  addr + common->ctop_off,
 391                                  addr + common->cbtm_off);
 392 }
 393
 394 static void process_interlaced_mode(int fid, struct common_obj *common)
 395 {
 396         /* device field id and local field id are in sync */
 397         /* If this is even field */
 398         if (0 == fid) {
 399                 if (common->cur_frm == common->next_frm)
 400                         return;
 401
 402                 /* one frame is displayed If next frame is
 403                  *  available, release cur_frm and move on */
 404                 /* Copy frame display time */
 405                 v4l2_get_timestamp(&common->cur_frm->vb.v4l2_buf.timestamp);
 406                 /* Change status of the cur_frm */
 407                 vb2_buffer_done(&common->cur_frm->vb,
 408                                             VB2_BUF_STATE_DONE);
 409                 /* Make cur_frm pointing to next_frm */
 410                 common->cur_frm = common->next_frm;
 411
 412         } else if (1 == fid) {  /* odd field */
 413                 spin_lock(&common->irqlock);
 414                 if (list_empty(&common->dma_queue)
 415                     || (common->cur_frm != common->next_frm)) {
 416                         spin_unlock(&common->irqlock);
 417                         return;
 418                 }
 419                 spin_unlock(&common->irqlock);
 420                 /* one field is displayed configure the next
 421                  * frame if it is available else hold on current
 422                  * frame */
 423                 /* Get next from the buffer queue */
 424                 process_progressive_mode(common);
 425         }
 426 }
 427
 428 /*
 429  * vpif_channel_isr: It changes status of the displayed buffer, takes next
 430  * buffer from the queue and sets its address in VPIF registers
 431  */
 432 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 433 {
 434         struct vpif_device *dev = &vpif_obj;
 435         struct channel_obj *ch;
 436         struct common_obj *common;
 437         enum v4l2_field field;
 438         int fid = -1, i;
 439         int channel_id = 0;
 440
 441         channel_id = *(int *)(dev_id);
 442         if (!vpif_intr_status(channel_id + 2))
 443                 return IRQ_NONE;
 444
 445         ch = dev->dev[channel_id];
 446         field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
 447         for (i = 0; i < VPIF_NUMOBJECTS; i++) {
 448                 common = &ch->common[i];
 449                 /* If streaming is started in this channel */
 450                 if (0 == common->started)
 451                         continue;
 452
 453                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 454                         spin_lock(&common->irqlock);
 455                         if (list_empty(&common->dma_queue)) {
 456                                 spin_unlock(&common->irqlock);
 457                                 continue;
 458                         }
 459                         spin_unlock(&common->irqlock);
 460
 461                         /* Progressive mode */
 462                         if (!channel_first_int[i][channel_id]) {
 463                                 /* Mark status of the cur_frm to
 464                                  * done and unlock semaphore on it */
 465                                 v4l2_get_timestamp(&common->cur_frm->vb.
 466                                                    v4l2_buf.timestamp);
 467                                 vb2_buffer_done(&common->cur_frm->vb,
 468                                             VB2_BUF_STATE_DONE);
 469                                 /* Make cur_frm pointing to next_frm */
 470                                 common->cur_frm = common->next_frm;
 471                         }
 472
 473                         channel_first_int[i][channel_id] = 0;
 474                         process_progressive_mode(common);
 475                 } else {
 476                         /* Interlaced mode */
 477                         /* If it is first interrupt, ignore it */
 478
 479                         if (channel_first_int[i][channel_id]) {
 480                                 channel_first_int[i][channel_id] = 0;
 481                                 continue;
 482                         }
 483
 484                         if (0 == i) {
 485                                 ch->field_id ^= 1;
 486                                 /* Get field id from VPIF registers */
 487                                 fid = vpif_channel_getfid(ch->channel_id + 2);
 488                                 /* If fid does not match with stored field id */
 489                                 if (fid != ch->field_id) {
 490                                         /* Make them in sync */
 491                                         if (0 == fid)
 492                                                 ch->field_id = fid;
 493
 494                                         return IRQ_HANDLED;
 495                                 }
 496                         }
 497                         process_interlaced_mode(fid, common);
 498                 }
 499         }
 500
 501         return IRQ_HANDLED;
 502 }
 503
 504 static int vpif_update_std_info(struct channel_obj *ch)
 505 {
 506         struct video_obj *vid_ch = &ch->video;
 507         struct vpif_params *vpifparams = &ch->vpifparams;
 508         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 509         const struct vpif_channel_config_params *config;
 510
 511         int i;
 512
 513         for (i = 0; i < vpif_ch_params_count; i++) {
 514                 config = &ch_params[i];
 515                 if (config->hd_sd == 0) {
 516                         vpif_dbg(2, debug, "SD format\n");
 517                         if (config->stdid & vid_ch->stdid) {
 518                                 memcpy(std_info, config, sizeof(*config));
 519                                 break;
 520                         }
 521                 }
 522         }
 523
 524         if (i == vpif_ch_params_count) {
 525                 vpif_dbg(1, debug, "Format not found\n");
 526                 return -EINVAL;
 527         }
 528
 529         return 0;
 530 }
 531
 532 static int vpif_update_resolution(struct channel_obj *ch)
 533 {
 534         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 535         struct video_obj *vid_ch = &ch->video;
 536         struct vpif_params *vpifparams = &ch->vpifparams;
 537         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 538
 539         if (!vid_ch->stdid && !vid_ch->dv_timings.bt.height)
 540                 return -EINVAL;
 541
 542         if (vid_ch->stdid) {
 543                 if (vpif_update_std_info(ch))
 544                         return -EINVAL;
 545         }
 546
 547         common->fmt.fmt.pix.width = std_info->width;
 548         common->fmt.fmt.pix.height = std_info->height;
 549         vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
 550                         common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
 551
 552         /* Set height and width paramateres */
 553         common->height = std_info->height;
 554         common->width = std_info->width;
 555
 556         return 0;
 557 }
 558
 559 /*
 560  * vpif_calculate_offsets: This function calculates buffers offset for Y and C
 561  * in the top and bottom field
 562  */
 563 static void vpif_calculate_offsets(struct channel_obj *ch)
 564 {
 565         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 566         struct vpif_params *vpifparams = &ch->vpifparams;
 567         enum v4l2_field field = common->fmt.fmt.pix.field;
 568         struct video_obj *vid_ch = &ch->video;
 569         unsigned int hpitch, vpitch, sizeimage;
 570
 571         if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
 572                 if (ch->vpifparams.std_info.frm_fmt)
 573                         vid_ch->buf_field = V4L2_FIELD_NONE;
 574                 else
 575                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 576         } else {
 577                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 578         }
 579
 580         sizeimage = common->fmt.fmt.pix.sizeimage;
 581
 582         hpitch = common->fmt.fmt.pix.bytesperline;
 583         vpitch = sizeimage / (hpitch * 2);
 584         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 585             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 586                 common->ytop_off = 0;
 587                 common->ybtm_off = hpitch;
 588                 common->ctop_off = sizeimage / 2;
 589                 common->cbtm_off = sizeimage / 2 + hpitch;
 590         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 591                 common->ytop_off = 0;
 592                 common->ybtm_off = sizeimage / 4;
 593                 common->ctop_off = sizeimage / 2;
 594                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 595         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 596                 common->ybtm_off = 0;
 597                 common->ytop_off = sizeimage / 4;
 598                 common->cbtm_off = sizeimage / 2;
 599                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 600         }
 601
 602         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 603             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 604                 vpifparams->video_params.storage_mode = 1;
 605         } else {
 606                 vpifparams->video_params.storage_mode = 0;
 607         }
 608
 609         if (ch->vpifparams.std_info.frm_fmt == 1) {
 610                 vpifparams->video_params.hpitch =
 611                     common->fmt.fmt.pix.bytesperline;
 612         } else {
 613                 if ((field == V4L2_FIELD_ANY) ||
 614                         (field == V4L2_FIELD_INTERLACED))
 615                         vpifparams->video_params.hpitch =
 616                             common->fmt.fmt.pix.bytesperline * 2;
 617                 else
 618                         vpifparams->video_params.hpitch =
 619                             common->fmt.fmt.pix.bytesperline;
 620         }
 621
 622         ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
 623 }
 624
 625 static void vpif_config_format(struct channel_obj *ch)
 626 {
 627         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 628
 629         common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
 630         if (config_params.numbuffers[ch->channel_id] == 0)
 631                 common->memory = V4L2_MEMORY_USERPTR;
 632         else
 633                 common->memory = V4L2_MEMORY_MMAP;
 634
 635         common->fmt.fmt.pix.sizeimage =
 636                         config_params.channel_bufsize[ch->channel_id];
 637         common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 638         common->fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 639 }
 640
 641 static int vpif_check_format(struct channel_obj *ch,
 642                              struct v4l2_pix_format *pixfmt)
 643 {
 644         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 645         enum v4l2_field field = pixfmt->field;
 646         u32 sizeimage, hpitch, vpitch;
 647
 648         if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
 649                 goto invalid_fmt_exit;
 650
 651         if (!(VPIF_VALID_FIELD(field)))
 652                 goto invalid_fmt_exit;
 653
 654         if (pixfmt->bytesperline <= 0)
 655                 goto invalid_pitch_exit;
 656
 657         sizeimage = pixfmt->sizeimage;
 658
 659         if (vpif_update_resolution(ch))
 660                 return -EINVAL;
 661
 662         hpitch = pixfmt->bytesperline;
 663         vpitch = sizeimage / (hpitch * 2);
 664
 665         /* Check for valid value of pitch */
 666         if ((hpitch < ch->vpifparams.std_info.width) ||
 667             (vpitch < ch->vpifparams.std_info.height))
 668                 goto invalid_pitch_exit;
 669
 670         /* Check for 8 byte alignment */
 671         if (!ISALIGNED(hpitch)) {
 672                 vpif_err("invalid pitch alignment\n");
 673                 return -EINVAL;
 674         }
 675         pixfmt->width = common->fmt.fmt.pix.width;
 676         pixfmt->height = common->fmt.fmt.pix.height;
 677
 678         return 0;
 679
 680 invalid_fmt_exit:
 681         vpif_err("invalid field format\n");
 682         return -EINVAL;
 683
 684 invalid_pitch_exit:
 685         vpif_err("invalid pitch\n");
 686         return -EINVAL;
 687 }
 688
 689 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 690 {
 691         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 692
 693         if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
 694                 common->set_addr = ch3_set_videobuf_addr;
 695         } else {
 696                 if (2 == muxmode)
 697                         common->set_addr = ch2_set_videobuf_addr_yc_nmux;
 698                 else
 699                         common->set_addr = ch2_set_videobuf_addr;
 700         }
 701 }
 702
 703 /*
 704  * vpif_mmap: It is used to map kernel space buffers into user spaces
 705  */
 706 static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
 707 {
 708         struct vpif_fh *fh = filep->private_data;
 709         struct channel_obj *ch = fh->channel;
 710         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
 711         int ret;
 712
 713         vpif_dbg(2, debug, "vpif_mmap\n");
 714
 715         if (mutex_lock_interruptible(&common->lock))
 716                 return -ERESTARTSYS;
 717         ret = vb2_mmap(&common->buffer_queue, vma);
 718         mutex_unlock(&common->lock);
 719         return ret;
 720 }
 721
 722 /*
 723  * vpif_poll: It is used for select/poll system call
 724  */
 725 static unsigned int vpif_poll(struct file *filep, poll_table *wait)
 726 {
 727         struct vpif_fh *fh = filep->private_data;
 728         struct channel_obj *ch = fh->channel;
 729         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 730         unsigned int res = 0;
 731
 732         if (common->started) {
 733                 mutex_lock(&common->lock);
 734                 res = vb2_poll(&common->buffer_queue, filep, wait);
 735                 mutex_unlock(&common->lock);
 736         }
 737
 738         return res;
 739 }
 740
 741 /*
 742  * vpif_open: It creates object of file handle structure and stores it in
 743  * private_data member of filepointer
 744  */
 745 static int vpif_open(struct file *filep)
 746 {
 747         struct video_device *vdev = video_devdata(filep);
 748         struct channel_obj *ch = video_get_drvdata(vdev);
 749         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 750         struct vpif_fh *fh;
 751
 752         /* Allocate memory for the file handle object */
 753         fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL);
 754         if (fh == NULL) {
 755                 vpif_err("unable to allocate memory for file handle object\n");
 756                 return -ENOMEM;
 757         }
 758
 759         if (mutex_lock_interruptible(&common->lock)) {
 760                 kfree(fh);
 761                 return -ERESTARTSYS;
 762         }
 763         /* store pointer to fh in private_data member of filep */
 764         filep->private_data = fh;
 765         fh->channel = ch;
 766         fh->initialized = 0;
 767         if (!ch->initialized) {
 768                 fh->initialized = 1;
 769                 ch->initialized = 1;
 770                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
 771         }
 772
 773         /* Increment channel usrs counter */
 774         atomic_inc(&ch->usrs);
 775         /* Set io_allowed[VPIF_VIDEO_INDEX] member to false */
 776         fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
 777         /* Initialize priority of this instance to default priority */
 778         fh->prio = V4L2_PRIORITY_UNSET;
 779         v4l2_prio_open(&ch->prio, &fh->prio);
 780         mutex_unlock(&common->lock);
 781
 782         return 0;
 783 }
 784
 785 /*
 786  * vpif_release: This function deletes buffer queue, frees the buffers and
 787  * the vpif file handle
 788  */
 789 static int vpif_release(struct file *filep)
 790 {
 791         struct vpif_fh *fh = filep->private_data;
 792         struct channel_obj *ch = fh->channel;
 793         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 794
 795         mutex_lock(&common->lock);
 796         /* if this instance is doing IO */
 797         if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
 798                 /* Reset io_usrs member of channel object */
 799                 common->io_usrs = 0;
 800                 /* Disable channel */
 801                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 802                         enable_channel2(0);
 803                         channel2_intr_enable(0);
 804                 }
 805                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
 806                     (2 == common->started)) {
 807                         enable_channel3(0);
 808                         channel3_intr_enable(0);
 809                 }
 810                 common->started = 0;
 811
 812                 /* Free buffers allocated */
 813                 vb2_queue_release(&common->buffer_queue);
 814                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
 815
 816                 common->numbuffers =
 817                     config_params.numbuffers[ch->channel_id];
 818         }
 819
 820         /* Decrement channel usrs counter */
 821         atomic_dec(&ch->usrs);
 822         /* If this file handle has initialize encoder device, reset it */
 823         if (fh->initialized)
 824                 ch->initialized = 0;
 825
 826         /* Close the priority */
 827         v4l2_prio_close(&ch->prio, fh->prio);
 828         filep->private_data = NULL;
 829         fh->initialized = 0;
 830         mutex_unlock(&common->lock);
 831         kfree(fh);
 832
 833         return 0;
 834 }
 835
 836 /* functions implementing ioctls */
 837 /**
 838  * vpif_querycap() - QUERYCAP handler
 839  * @file: file ptr
 840  * @priv: file handle
 841  * @cap: ptr to v4l2_capability structure
 842  */
 843 static int vpif_querycap(struct file *file, void  *priv,
 844                                 struct v4l2_capability *cap)
 845 {
 846         struct vpif_display_config *config = vpif_dev->platform_data;
 847
 848         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 849         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 850         snprintf(cap->driver, sizeof(cap->driver), "%s", dev_name(vpif_dev));
 851         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 852                  dev_name(vpif_dev));
 853         strlcpy(cap->card, config->card_name, sizeof(cap->card));
 854
 855         return 0;
 856 }
 857
 858 static int vpif_enum_fmt_vid_out(struct file *file, void  *priv,
 859                                         struct v4l2_fmtdesc *fmt)
 860 {
 861         if (fmt->index != 0) {
 862                 vpif_err("Invalid format index\n");
 863                 return -EINVAL;
 864         }
 865
 866         /* Fill in the information about format */
 867         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 868         strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
 869         fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 870
 871         return 0;
 872 }
 873
 874 static int vpif_g_fmt_vid_out(struct file *file, void *priv,
 875                                 struct v4l2_format *fmt)
 876 {
 877         struct vpif_fh *fh = priv;
 878         struct channel_obj *ch = fh->channel;
 879         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 880
 881         /* Check the validity of the buffer type */
 882         if (common->fmt.type != fmt->type)
 883                 return -EINVAL;
 884
 885         if (vpif_update_resolution(ch))
 886                 return -EINVAL;
 887         *fmt = common->fmt;
 888         return 0;
 889 }
 890
 891 static int vpif_s_fmt_vid_out(struct file *file, void *priv,
 892                                 struct v4l2_format *fmt)
 893 {
 894         struct vpif_fh *fh = priv;
 895         struct v4l2_pix_format *pixfmt;
 896         struct channel_obj *ch = fh->channel;
 897         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 898         int ret = 0;
 899
 900         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 901             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 902                 if (!fh->initialized) {
 903                         vpif_dbg(1, debug, "Channel Busy\n");
 904                         return -EBUSY;
 905                 }
 906
 907                 /* Check for the priority */
 908                 ret = v4l2_prio_check(&ch->prio, fh->prio);
 909                 if (0 != ret)
 910                         return ret;
 911                 fh->initialized = 1;
 912         }
 913
 914         if (common->started) {
 915                 vpif_dbg(1, debug, "Streaming in progress\n");
 916                 return -EBUSY;
 917         }
 918
 919         pixfmt = &fmt->fmt.pix;
 920         /* Check for valid field format */
 921         ret = vpif_check_format(ch, pixfmt);
 922         if (ret)
 923                 return ret;
 924
 925         /* store the pix format in the channel object */
 926         common->fmt.fmt.pix = *pixfmt;
 927         /* store the format in the channel object */
 928         common->fmt = *fmt;
 929         return 0;
 930 }
 931
 932 static int vpif_try_fmt_vid_out(struct file *file, void *priv,
 933                                 struct v4l2_format *fmt)
 934 {
 935         struct vpif_fh *fh = priv;
 936         struct channel_obj *ch = fh->channel;
 937         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 938         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 939         int ret = 0;
 940
 941         ret = vpif_check_format(ch, pixfmt);
 942         if (ret) {
 943                 *pixfmt = common->fmt.fmt.pix;
 944                 pixfmt->sizeimage = pixfmt->width * pixfmt->height * 2;
 945         }
 946
 947         return ret;
 948 }
 949
 950 static int vpif_reqbufs(struct file *file, void *priv,
 951                         struct v4l2_requestbuffers *reqbuf)
 952 {
 953         struct vpif_fh *fh = priv;
 954         struct channel_obj *ch = fh->channel;
 955         struct common_obj *common;
 956         enum v4l2_field field;
 957         struct vb2_queue *q;
 958         u8 index = 0;
 959         int ret;
 960
 961         /* This file handle has not initialized the channel,
 962            It is not allowed to do settings */
 963         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 964             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 965                 if (!fh->initialized) {
 966                         vpif_err("Channel Busy\n");
 967                         return -EBUSY;
 968                 }
 969         }
 970
 971         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != reqbuf->type)
 972                 return -EINVAL;
 973
 974         index = VPIF_VIDEO_INDEX;
 975
 976         common = &ch->common[index];
 977
 978         if (common->fmt.type != reqbuf->type || !vpif_dev)
 979                 return -EINVAL;
 980         if (0 != common->io_usrs)
 981                 return -EBUSY;
 982
 983         if (reqbuf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 984                 if (common->fmt.fmt.pix.field == V4L2_FIELD_ANY)
 985                         field = V4L2_FIELD_INTERLACED;
 986                 else
 987                         field = common->fmt.fmt.pix.field;
 988         } else {
 989                 field = V4L2_VBI_INTERLACED;
 990         }
 991         /* Initialize videobuf2 queue as per the buffer type */
 992         common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
 993         if (IS_ERR(common->alloc_ctx)) {
 994                 vpif_err("Failed to get the context\n");
 995                 return PTR_ERR(common->alloc_ctx);
 996         }
 997         q = &common->buffer_queue;
 998         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 999         q->io_modes = VB2_MMAP | VB2_USERPTR;
1000         q->drv_priv = fh;
1001         q->ops = &video_qops;
1002         q->mem_ops = &vb2_dma_contig_memops;
1003         q->buf_struct_size = sizeof(struct vpif_disp_buffer);
1004
1005         ret = vb2_queue_init(q);
1006         if (ret) {
1007                 vpif_err("vpif_display: vb2_queue_init() failed\n");
1008                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1009                 return ret;
1010         }
1011         /* Set io allowed member of file handle to TRUE */
1012         fh->io_allowed[index] = 1;
1013         /* Increment io usrs member of channel object to 1 */
1014         common->io_usrs = 1;
1015         /* Store type of memory requested in channel object */
1016         common->memory = reqbuf->memory;
1017         INIT_LIST_HEAD(&common->dma_queue);
1018         /* Allocate buffers */
1019         return vb2_reqbufs(&common->buffer_queue, reqbuf);
1020 }
1021
1022 static int vpif_querybuf(struct file *file, void *priv,
1023                                 struct v4l2_buffer *tbuf)
1024 {
1025         struct vpif_fh *fh = priv;
1026         struct channel_obj *ch = fh->channel;
1027         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1028
1029         if (common->fmt.type != tbuf->type)
1030                 return -EINVAL;
1031
1032         return vb2_querybuf(&common->buffer_queue, tbuf);
1033 }
1034
1035 static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
1036 {
1037         struct vpif_fh *fh = NULL;
1038         struct channel_obj *ch = NULL;
1039         struct common_obj *common = NULL;
1040
1041         if (!buf || !priv)
1042                 return -EINVAL;
1043
1044         fh = priv;
1045         ch = fh->channel;
1046         if (!ch)
1047                 return -EINVAL;
1048
1049         common = &(ch->common[VPIF_VIDEO_INDEX]);
1050         if (common->fmt.type != buf->type)
1051                 return -EINVAL;
1052
1053         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1054                 vpif_err("fh->io_allowed\n");
1055                 return -EACCES;
1056         }
1057
1058         return vb2_qbuf(&common->buffer_queue, buf);
1059 }
1060
1061 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
1062 {
1063         struct vpif_fh *fh = priv;
1064         struct channel_obj *ch = fh->channel;
1065         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1066         int ret = 0;
1067
1068         if (!(*std_id & VPIF_V4L2_STD))
1069                 return -EINVAL;
1070
1071         if (common->started) {
1072                 vpif_err("streaming in progress\n");
1073                 return -EBUSY;
1074         }
1075
1076         /* Call encoder subdevice function to set the standard */
1077         ch->video.stdid = *std_id;
1078         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1079         /* Get the information about the standard */
1080         if (vpif_update_resolution(ch))
1081                 return -EINVAL;
1082
1083         if ((ch->vpifparams.std_info.width *
1084                 ch->vpifparams.std_info.height * 2) >
1085                 config_params.channel_bufsize[ch->channel_id]) {
1086                 vpif_err("invalid std for this size\n");
1087                 return -EINVAL;
1088         }
1089
1090         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
1091         /* Configure the default format information */
1092         vpif_config_format(ch);
1093
1094         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
1095                                                 s_std_output, *std_id);
1096         if (ret < 0) {
1097                 vpif_err("Failed to set output standard\n");
1098                 return ret;
1099         }
1100
1101         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, core,
1102                                                         s_std, *std_id);
1103         if (ret < 0)
1104                 vpif_err("Failed to set standard for sub devices\n");
1105         return ret;
1106 }
1107
1108 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1109 {
1110         struct vpif_fh *fh = priv;
1111         struct channel_obj *ch = fh->channel;
1112
1113         *std = ch->video.stdid;
1114         return 0;
1115 }
1116
1117 static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
1118 {
1119         struct vpif_fh *fh = priv;
1120         struct channel_obj *ch = fh->channel;
1121         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1122
1123         return vb2_dqbuf(&common->buffer_queue, p,
1124                                         (file->f_flags & O_NONBLOCK));
1125 }
1126
1127 static int vpif_streamon(struct file *file, void *priv,
1128                                 enum v4l2_buf_type buftype)
1129 {
1130         struct vpif_fh *fh = priv;
1131         struct channel_obj *ch = fh->channel;
1132         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1133         struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1134         int ret = 0;
1135
1136         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1137                 vpif_err("buffer type not supported\n");
1138                 return -EINVAL;
1139         }
1140
1141         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1142                 vpif_err("fh->io_allowed\n");
1143                 return -EACCES;
1144         }
1145
1146         /* If Streaming is already started, return error */
1147         if (common->started) {
1148                 vpif_err("channel->started\n");
1149                 return -EBUSY;
1150         }
1151
1152         if ((ch->channel_id == VPIF_CHANNEL2_VIDEO
1153                 && oth_ch->common[VPIF_VIDEO_INDEX].started &&
1154                 ch->vpifparams.std_info.ycmux_mode == 0)
1155                 || ((ch->channel_id == VPIF_CHANNEL3_VIDEO)
1156                 && (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1157                 vpif_err("other channel is using\n");
1158                 return -EBUSY;
1159         }
1160
1161         ret = vpif_check_format(ch, &common->fmt.fmt.pix);
1162         if (ret < 0)
1163                 return ret;
1164
1165         /* Call vb2_streamon to start streaming in videobuf2 */
1166         ret = vb2_streamon(&common->buffer_queue, buftype);
1167         if (ret < 0) {
1168                 vpif_err("vb2_streamon\n");
1169                 return ret;
1170         }
1171
1172         return ret;
1173 }
1174
1175 static int vpif_streamoff(struct file *file, void *priv,
1176                                 enum v4l2_buf_type buftype)
1177 {
1178         struct vpif_fh *fh = priv;
1179         struct channel_obj *ch = fh->channel;
1180         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1181         struct vpif_display_config *vpif_config_data =
1182                                         vpif_dev->platform_data;
1183
1184         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1185                 vpif_err("buffer type not supported\n");
1186                 return -EINVAL;
1187         }
1188
1189         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1190                 vpif_err("fh->io_allowed\n");
1191                 return -EACCES;
1192         }
1193
1194         if (!common->started) {
1195                 vpif_err("channel->started\n");
1196                 return -EINVAL;
1197         }
1198
1199         if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1200                 /* disable channel */
1201                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
1202                         if (vpif_config_data->
1203                                 chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
1204                                 channel2_clipping_enable(0);
1205                         enable_channel2(0);
1206                         channel2_intr_enable(0);
1207                 }
1208                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
1209                                         (2 == common->started)) {
1210                         if (vpif_config_data->
1211                                 chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
1212                                 channel3_clipping_enable(0);
1213                         enable_channel3(0);
1214                         channel3_intr_enable(0);
1215                 }
1216         }
1217
1218         common->started = 0;
1219         return vb2_streamoff(&common->buffer_queue, buftype);
1220 }
1221
1222 static int vpif_cropcap(struct file *file, void *priv,
1223                         struct v4l2_cropcap *crop)
1224 {
1225         struct vpif_fh *fh = priv;
1226         struct channel_obj *ch = fh->channel;
1227         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1228         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != crop->type)
1229                 return -EINVAL;
1230
1231         crop->bounds.left = crop->bounds.top = 0;
1232         crop->defrect.left = crop->defrect.top = 0;
1233         crop->defrect.height = crop->bounds.height = common->height;
1234         crop->defrect.width = crop->bounds.width = common->width;
1235
1236         return 0;
1237 }
1238
1239 static int vpif_enum_output(struct file *file, void *fh,
1240                                 struct v4l2_output *output)
1241 {
1242
1243         struct vpif_display_config *config = vpif_dev->platform_data;
1244         struct vpif_display_chan_config *chan_cfg;
1245         struct vpif_fh *vpif_handler = fh;
1246         struct channel_obj *ch = vpif_handler->channel;
1247
1248         chan_cfg = &config->chan_config[ch->channel_id];
1249         if (output->index >= chan_cfg->output_count) {
1250                 vpif_dbg(1, debug, "Invalid output index\n");
1251                 return -EINVAL;
1252         }
1253
1254         *output = chan_cfg->outputs[output->index].output;
1255         return 0;
1256 }
1257
1258 /**
1259  * vpif_output_to_subdev() - Maps output to sub device
1260  * @vpif_cfg - global config ptr
1261  * @chan_cfg - channel config ptr
1262  * @index - Given output index from application
1263  *
1264  * lookup the sub device information for a given output index.
1265  * we report all the output to application. output table also
1266  * has sub device name for the each output
1267  */
1268 static int
1269 vpif_output_to_subdev(struct vpif_display_config *vpif_cfg,
1270                       struct vpif_display_chan_config *chan_cfg, int index)
1271 {
1272         struct vpif_subdev_info *subdev_info;
1273         const char *subdev_name;
1274         int i;
1275
1276         vpif_dbg(2, debug, "vpif_output_to_subdev\n");
1277
1278         if (chan_cfg->outputs == NULL)
1279                 return -1;
1280
1281         subdev_name = chan_cfg->outputs[index].subdev_name;
1282         if (subdev_name == NULL)
1283                 return -1;
1284
1285         /* loop through the sub device list to get the sub device info */
1286         for (i = 0; i < vpif_cfg->subdev_count; i++) {
1287                 subdev_info = &vpif_cfg->subdevinfo[i];
1288                 if (!strcmp(subdev_info->name, subdev_name))
1289                         return i;
1290         }
1291         return -1;
1292 }
1293
1294 /**
1295  * vpif_set_output() - Select an output
1296  * @vpif_cfg - global config ptr
1297  * @ch - channel
1298  * @index - Given output index from application
1299  *
1300  * Select the given output.
1301  */
1302 static int vpif_set_output(struct vpif_display_config *vpif_cfg,
1303                       struct channel_obj *ch, int index)
1304 {
1305         struct vpif_display_chan_config *chan_cfg =
1306                 &vpif_cfg->chan_config[ch->channel_id];
1307         struct vpif_subdev_info *subdev_info = NULL;
1308         struct v4l2_subdev *sd = NULL;
1309         u32 input = 0, output = 0;
1310         int sd_index;
1311         int ret;
1312
1313         sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
1314         if (sd_index >= 0) {
1315                 sd = vpif_obj.sd[sd_index];
1316                 subdev_info = &vpif_cfg->subdevinfo[sd_index];
1317         }
1318
1319         if (sd) {
1320                 input = chan_cfg->outputs[index].input_route;
1321                 output = chan_cfg->outputs[index].output_route;
1322                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
1323                 if (ret < 0 && ret != -ENOIOCTLCMD) {
1324                         vpif_err("Failed to set output\n");
1325                         return ret;
1326                 }
1327
1328         }
1329         ch->output_idx = index;
1330         ch->sd = sd;
1331         if (chan_cfg->outputs != NULL)
1332                 /* update tvnorms from the sub device output info */
1333                 ch->video_dev->tvnorms = chan_cfg->outputs[index].output.std;
1334         return 0;
1335 }
1336
1337 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
1338 {
1339         struct vpif_display_config *config = vpif_dev->platform_data;
1340         struct vpif_display_chan_config *chan_cfg;
1341         struct vpif_fh *fh = priv;
1342         struct channel_obj *ch = fh->channel;
1343         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1344
1345         chan_cfg = &config->chan_config[ch->channel_id];
1346
1347         if (i >= chan_cfg->output_count)
1348                 return -EINVAL;
1349
1350         if (common->started) {
1351                 vpif_err("Streaming in progress\n");
1352                 return -EBUSY;
1353         }
1354
1355         return vpif_set_output(config, ch, i);
1356 }
1357
1358 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
1359 {
1360         struct vpif_fh *fh = priv;
1361         struct channel_obj *ch = fh->channel;
1362
1363         *i = ch->output_idx;
1364
1365         return 0;
1366 }
1367
1368 static int vpif_g_priority(struct file *file, void *priv, enum v4l2_priority *p)
1369 {
1370         struct vpif_fh *fh = priv;
1371         struct channel_obj *ch = fh->channel;
1372
1373         *p = v4l2_prio_max(&ch->prio);
1374
1375         return 0;
1376 }
1377
1378 static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1379 {
1380         struct vpif_fh *fh = priv;
1381         struct channel_obj *ch = fh->channel;
1382
1383         return v4l2_prio_change(&ch->prio, &fh->prio, p);
1384 }
1385
1386 /**
1387  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
1388  * @file: file ptr
1389  * @priv: file handle
1390  * @timings: input timings
1391  */
1392 static int
1393 vpif_enum_dv_timings(struct file *file, void *priv,
1394                      struct v4l2_enum_dv_timings *timings)
1395 {
1396         struct vpif_fh *fh = priv;
1397         struct channel_obj *ch = fh->channel;
1398         int ret;
1399
1400         ret = v4l2_subdev_call(ch->sd, video, enum_dv_timings, timings);
1401         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1402                 return -EINVAL;
1403         return ret;
1404 }
1405
1406 /**
1407  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1408  * @file: file ptr
1409  * @priv: file handle
1410  * @timings: digital video timings
1411  */
1412 static int vpif_s_dv_timings(struct file *file, void *priv,
1413                 struct v4l2_dv_timings *timings)
1414 {
1415         struct vpif_fh *fh = priv;
1416         struct channel_obj *ch = fh->channel;
1417         struct vpif_params *vpifparams = &ch->vpifparams;
1418         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1419         struct video_obj *vid_ch = &ch->video;
1420         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
1421         int ret;
1422
1423         if (timings->type != V4L2_DV_BT_656_1120) {
1424                 vpif_dbg(2, debug, "Timing type not defined\n");
1425                 return -EINVAL;
1426         }
1427
1428         /* Configure subdevice timings, if any */
1429         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
1430         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1431                 ret = 0;
1432         if (ret < 0) {
1433                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1434                 return ret;
1435         }
1436
1437         if (!(timings->bt.width && timings->bt.height &&
1438                                 (timings->bt.hbackporch ||
1439                                  timings->bt.hfrontporch ||
1440                                  timings->bt.hsync) &&
1441                                 timings->bt.vfrontporch &&
1442                                 (timings->bt.vbackporch ||
1443                                  timings->bt.vsync))) {
1444                 vpif_dbg(2, debug, "Timings for width, height, "
1445                                 "horizontal back porch, horizontal sync, "
1446                                 "horizontal front porch, vertical back porch, "
1447                                 "vertical sync and vertical back porch "
1448                                 "must be defined\n");
1449                 return -EINVAL;
1450         }
1451
1452         vid_ch->dv_timings = *timings;
1453
1454         /* Configure video port timings */
1455
1456         std_info->eav2sav = bt->hbackporch + bt->hfrontporch +
1457                 bt->hsync - 8;
1458         std_info->sav2eav = bt->width;
1459
1460         std_info->l1 = 1;
1461         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1462
1463         if (bt->interlaced) {
1464                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1465                         std_info->vsize = bt->height * 2 +
1466                                 bt->vfrontporch + bt->vsync + bt->vbackporch +
1467                                 bt->il_vfrontporch + bt->il_vsync +
1468                                 bt->il_vbackporch;
1469                         std_info->l5 = std_info->vsize/2 -
1470                                 (bt->vfrontporch - 1);
1471                         std_info->l7 = std_info->vsize/2 + 1;
1472                         std_info->l9 = std_info->l7 + bt->il_vsync +
1473                                 bt->il_vbackporch + 1;
1474                         std_info->l11 = std_info->vsize -
1475                                 (bt->il_vfrontporch - 1);
1476                 } else {
1477                         vpif_dbg(2, debug, "Required timing values for "
1478                                         "interlaced BT format missing\n");
1479                         return -EINVAL;
1480                 }
1481         } else {
1482                 std_info->vsize = bt->height + bt->vfrontporch +
1483                         bt->vsync + bt->vbackporch;
1484                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1485         }
1486         strncpy(std_info->name, "Custom timings BT656/1120",
1487                         VPIF_MAX_NAME);
1488         std_info->width = bt->width;
1489         std_info->height = bt->height;
1490         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1491         std_info->ycmux_mode = 0;
1492         std_info->capture_format = 0;
1493         std_info->vbi_supported = 0;
1494         std_info->hd_sd = 1;
1495         std_info->stdid = 0;
1496         vid_ch->stdid = 0;
1497
1498         return 0;
1499 }
1500
1501 /**
1502  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1503  * @file: file ptr
1504  * @priv: file handle
1505  * @timings: digital video timings
1506  */
1507 static int vpif_g_dv_timings(struct file *file, void *priv,
1508                 struct v4l2_dv_timings *timings)
1509 {
1510         struct vpif_fh *fh = priv;
1511         struct channel_obj *ch = fh->channel;
1512         struct video_obj *vid_ch = &ch->video;
1513
1514         *timings = vid_ch->dv_timings;
1515
1516         return 0;
1517 }
1518
1519 /*
1520  * vpif_g_chip_ident() - Identify the chip
1521  * @file: file ptr
1522  * @priv: file handle
1523  * @chip: chip identity
1524  *
1525  * Returns zero or -EINVAL if read operations fails.
1526  */
1527 static int vpif_g_chip_ident(struct file *file, void *priv,
1528                 struct v4l2_dbg_chip_ident *chip)
1529 {
1530         chip->ident = V4L2_IDENT_NONE;
1531         chip->revision = 0;
1532         if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
1533                         chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR) {
1534                 vpif_dbg(2, debug, "match_type is invalid.\n");
1535                 return -EINVAL;
1536         }
1537
1538         return v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 0, core,
1539                         g_chip_ident, chip);
1540 }
1541
1542 #ifdef CONFIG_VIDEO_ADV_DEBUG
1543 /*
1544  * vpif_dbg_g_register() - Read register
1545  * @file: file ptr
1546  * @priv: file handle
1547  * @reg: register to be read
1548  *
1549  * Debugging only
1550  * Returns zero or -EINVAL if read operations fails.
1551  */
1552 static int vpif_dbg_g_register(struct file *file, void *priv,
1553                 struct v4l2_dbg_register *reg){
1554         struct vpif_fh *fh = priv;
1555         struct channel_obj *ch = fh->channel;
1556
1557         return v4l2_subdev_call(ch->sd, core, g_register, reg);
1558 }
1559
1560 /*
1561  * vpif_dbg_s_register() - Write to register
1562  * @file: file ptr
1563  * @priv: file handle
1564  * @reg: register to be modified
1565  *
1566  * Debugging only
1567  * Returns zero or -EINVAL if write operations fails.
1568  */
1569 static int vpif_dbg_s_register(struct file *file, void *priv,
1570                 struct v4l2_dbg_register *reg){
1571         struct vpif_fh *fh = priv;
1572         struct channel_obj *ch = fh->channel;
1573
1574         return v4l2_subdev_call(ch->sd, core, s_register, reg);
1575 }
1576 #endif
1577
1578 /*
1579  * vpif_log_status() - Status information
1580  * @file: file ptr
1581  * @priv: file handle
1582  *
1583  * Returns zero.
1584  */
1585 static int vpif_log_status(struct file *filep, void *priv)
1586 {
1587         /* status for sub devices */
1588         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1589
1590         return 0;
1591 }
1592
1593 /* vpif display ioctl operations */
1594 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1595         .vidioc_querycap                = vpif_querycap,
1596         .vidioc_g_priority              = vpif_g_priority,
1597         .vidioc_s_priority              = vpif_s_priority,
1598         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1599         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1600         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1601         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1602         .vidioc_reqbufs                 = vpif_reqbufs,
1603         .vidioc_querybuf                = vpif_querybuf,
1604         .vidioc_qbuf                    = vpif_qbuf,
1605         .vidioc_dqbuf                   = vpif_dqbuf,
1606         .vidioc_streamon                = vpif_streamon,
1607         .vidioc_streamoff               = vpif_streamoff,
1608         .vidioc_s_std                   = vpif_s_std,
1609         .vidioc_g_std                   = vpif_g_std,
1610         .vidioc_enum_output             = vpif_enum_output,
1611         .vidioc_s_output                = vpif_s_output,
1612         .vidioc_g_output                = vpif_g_output,
1613         .vidioc_cropcap                 = vpif_cropcap,
1614         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1615         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1616         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1617         .vidioc_g_chip_ident            = vpif_g_chip_ident,
1618 #ifdef CONFIG_VIDEO_ADV_DEBUG
1619         .vidioc_g_register              = vpif_dbg_g_register,
1620         .vidioc_s_register              = vpif_dbg_s_register,
1621 #endif
1622         .vidioc_log_status              = vpif_log_status,
1623 };
1624
1625 static const struct v4l2_file_operations vpif_fops = {
1626         .owner          = THIS_MODULE,
1627         .open           = vpif_open,
1628         .release        = vpif_release,
1629         .unlocked_ioctl = video_ioctl2,
1630         .mmap           = vpif_mmap,
1631         .poll           = vpif_poll
1632 };
1633
1634 static struct video_device vpif_video_template = {
1635         .name           = "vpif",
1636         .fops           = &vpif_fops,
1637         .ioctl_ops      = &vpif_ioctl_ops,
1638 };
1639
1640 /*Configure the channels, buffer sizei, request irq */
1641 static int initialize_vpif(void)
1642 {
1643         int free_channel_objects_index;
1644         int free_buffer_channel_index;
1645         int free_buffer_index;
1646         int err = 0, i, j;
1647
1648         /* Default number of buffers should be 3 */
1649         if ((ch2_numbuffers > 0) &&
1650             (ch2_numbuffers < config_params.min_numbuffers))
1651                 ch2_numbuffers = config_params.min_numbuffers;
1652         if ((ch3_numbuffers > 0) &&
1653             (ch3_numbuffers < config_params.min_numbuffers))
1654                 ch3_numbuffers = config_params.min_numbuffers;
1655
1656         /* Set buffer size to min buffers size if invalid buffer size is
1657          * given */
1658         if (ch2_bufsize < config_params.min_bufsize[VPIF_CHANNEL2_VIDEO])
1659                 ch2_bufsize =
1660                     config_params.min_bufsize[VPIF_CHANNEL2_VIDEO];
1661         if (ch3_bufsize < config_params.min_bufsize[VPIF_CHANNEL3_VIDEO])
1662                 ch3_bufsize =
1663                     config_params.min_bufsize[VPIF_CHANNEL3_VIDEO];
1664
1665         config_params.numbuffers[VPIF_CHANNEL2_VIDEO] = ch2_numbuffers;
1666
1667         if (ch2_numbuffers) {
1668                 config_params.channel_bufsize[VPIF_CHANNEL2_VIDEO] =
1669                                                         ch2_bufsize;
1670         }
1671         config_params.numbuffers[VPIF_CHANNEL3_VIDEO] = ch3_numbuffers;
1672
1673         if (ch3_numbuffers) {
1674                 config_params.channel_bufsize[VPIF_CHANNEL3_VIDEO] =
1675                                                         ch3_bufsize;
1676         }
1677
1678         /* Allocate memory for six channel objects */
1679         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1680                 vpif_obj.dev[i] =
1681                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1682                 /* If memory allocation fails, return error */
1683                 if (!vpif_obj.dev[i]) {
1684                         free_channel_objects_index = i;
1685                         err = -ENOMEM;
1686                         goto vpif_init_free_channel_objects;
1687                 }
1688         }
1689
1690         free_channel_objects_index = VPIF_DISPLAY_MAX_DEVICES;
1691         free_buffer_channel_index = VPIF_DISPLAY_NUM_CHANNELS;
1692         free_buffer_index = config_params.numbuffers[i - 1];
1693
1694         return 0;
1695
1696 vpif_init_free_channel_objects:
1697         for (j = 0; j < free_channel_objects_index; j++)
1698                 kfree(vpif_obj.dev[j]);
1699         return err;
1700 }
1701
1702 /*
1703  * vpif_probe: This function creates device entries by register itself to the
1704  * V4L2 driver and initializes fields of each channel objects
1705  */
1706 static __init int vpif_probe(struct platform_device *pdev)
1707 {
1708         struct vpif_subdev_info *subdevdata;
1709         struct vpif_display_config *config;
1710         int i, j = 0, k, err = 0;
1711         int res_idx = 0;
1712         struct i2c_adapter *i2c_adap;
1713         struct common_obj *common;
1714         struct channel_obj *ch;
1715         struct video_device *vfd;
1716         struct resource *res;
1717         int subdev_count;
1718         size_t size;
1719
1720         vpif_dev = &pdev->dev;
1721         err = initialize_vpif();
1722
1723         if (err) {
1724                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1725                 return err;
1726         }
1727
1728         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1729         if (err) {
1730                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1731                 return err;
1732         }
1733
1734         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1735                 for (i = res->start; i <= res->end; i++) {
1736                         if (request_irq(i, vpif_channel_isr, IRQF_SHARED,
1737                                         "VPIF_Display", (void *)
1738                                         (&vpif_obj.dev[res_idx]->channel_id))) {
1739                                 err = -EBUSY;
1740                                 for (j = 0; j < i; j++)
1741                                         free_irq(j, (void *)
1742                                         (&vpif_obj.dev[res_idx]->channel_id));
1743                                 goto vpif_int_err;
1744                         }
1745                 }
1746                 res_idx++;
1747         }
1748
1749         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1750                 /* Get the pointer to the channel object */
1751                 ch = vpif_obj.dev[i];
1752
1753                 /* Allocate memory for video device */
1754                 vfd = video_device_alloc();
1755                 if (vfd == NULL) {
1756                         for (j = 0; j < i; j++) {
1757                                 ch = vpif_obj.dev[j];
1758                                 video_device_release(ch->video_dev);
1759                         }
1760                         err = -ENOMEM;
1761                         goto vpif_int_err;
1762                 }
1763
1764                 /* Initialize field of video device */
1765                 *vfd = vpif_video_template;
1766                 vfd->v4l2_dev = &vpif_obj.v4l2_dev;
1767                 vfd->release = video_device_release;
1768                 vfd->vfl_dir = VFL_DIR_TX;
1769                 snprintf(vfd->name, sizeof(vfd->name),
1770                          "VPIF_Display_DRIVER_V%s",
1771                          VPIF_DISPLAY_VERSION);
1772
1773                 /* Set video_dev to the video device */
1774                 ch->video_dev = vfd;
1775         }
1776
1777         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1778         if (res) {
1779                 size = resource_size(res);
1780                 /* The resources are divided into two equal memory and when
1781                  * we have HD output we can add them together
1782                  */
1783                 for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1784                         ch = vpif_obj.dev[j];
1785                         ch->channel_id = j;
1786
1787                         /* only enabled if second resource exists */
1788                         config_params.video_limit[ch->channel_id] = 0;
1789                         if (size)
1790                                 config_params.video_limit[ch->channel_id] =
1791                                                                         size/2;
1792                 }
1793         }
1794
1795         i2c_adap = i2c_get_adapter(1);
1796         config = pdev->dev.platform_data;
1797         subdev_count = config->subdev_count;
1798         subdevdata = config->subdevinfo;
1799         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1800                                                                 GFP_KERNEL);
1801         if (vpif_obj.sd == NULL) {
1802                 vpif_err("unable to allocate memory for subdevice pointers\n");
1803                 err = -ENOMEM;
1804                 goto vpif_sd_error;
1805         }
1806
1807         for (i = 0; i < subdev_count; i++) {
1808                 vpif_obj.sd[i] = v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1809                                                 i2c_adap,
1810                                                 &subdevdata[i].board_info,
1811                                                 NULL);
1812                 if (!vpif_obj.sd[i]) {
1813                         vpif_err("Error registering v4l2 subdevice\n");
1814                         goto probe_subdev_out;
1815                 }
1816
1817                 if (vpif_obj.sd[i])
1818                         vpif_obj.sd[i]->grp_id = 1 << i;
1819         }
1820
1821         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1822                 ch = vpif_obj.dev[j];
1823                 /* Initialize field of the channel objects */
1824                 atomic_set(&ch->usrs, 0);
1825                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1826                         ch->common[k].numbuffers = 0;
1827                         common = &ch->common[k];
1828                         common->io_usrs = 0;
1829                         common->started = 0;
1830                         spin_lock_init(&common->irqlock);
1831                         mutex_init(&common->lock);
1832                         common->numbuffers = 0;
1833                         common->set_addr = NULL;
1834                         common->ytop_off = common->ybtm_off = 0;
1835                         common->ctop_off = common->cbtm_off = 0;
1836                         common->cur_frm = common->next_frm = NULL;
1837                         memset(&common->fmt, 0, sizeof(common->fmt));
1838                         common->numbuffers = config_params.numbuffers[k];
1839
1840                 }
1841                 ch->initialized = 0;
1842                 if (subdev_count)
1843                         ch->sd = vpif_obj.sd[0];
1844                 ch->channel_id = j;
1845                 if (j < 2)
1846                         ch->common[VPIF_VIDEO_INDEX].numbuffers =
1847                             config_params.numbuffers[ch->channel_id];
1848                 else
1849                         ch->common[VPIF_VIDEO_INDEX].numbuffers = 0;
1850
1851                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1852
1853                 /* Initialize prio member of channel object */
1854                 v4l2_prio_init(&ch->prio);
1855                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1856                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1857                 ch->video_dev->lock = &common->lock;
1858                 video_set_drvdata(ch->video_dev, ch);
1859
1860                 /* select output 0 */
1861                 err = vpif_set_output(config, ch, 0);
1862                 if (err)
1863                         goto probe_out;
1864
1865                 /* register video device */
1866                 vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
1867                                 (int)ch, (int)&ch->video_dev);
1868
1869                 err = video_register_device(ch->video_dev,
1870                                           VFL_TYPE_GRABBER, (j ? 3 : 2));
1871                 if (err < 0)
1872                         goto probe_out;
1873         }
1874
1875         v4l2_info(&vpif_obj.v4l2_dev,
1876                         " VPIF display driver initialized\n");
1877         return 0;
1878
1879 probe_out:
1880         for (k = 0; k < j; k++) {
1881                 ch = vpif_obj.dev[k];
1882                 video_unregister_device(ch->video_dev);
1883                 video_device_release(ch->video_dev);
1884                 ch->video_dev = NULL;
1885         }
1886 probe_subdev_out:
1887         kfree(vpif_obj.sd);
1888 vpif_sd_error:
1889         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1890                 ch = vpif_obj.dev[i];
1891                 /* Note: does nothing if ch->video_dev == NULL */
1892                 video_device_release(ch->video_dev);
1893         }
1894 vpif_int_err:
1895         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1896         vpif_err("VPIF IRQ request failed\n");
1897         for (i = 0; i < res_idx; i++) {
1898                 res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
1899                 for (j = res->start; j <= res->end; j++)
1900                         free_irq(j, (void *)(&vpif_obj.dev[i]->channel_id));
1901         }
1902
1903         return err;
1904 }
1905
1906 /*
1907  * vpif_remove: It un-register channels from V4L2 driver
1908  */
1909 static int vpif_remove(struct platform_device *device)
1910 {
1911         struct channel_obj *ch;
1912         int i;
1913
1914         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1915
1916         /* un-register device */
1917         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1918                 /* Get the pointer to the channel object */
1919                 ch = vpif_obj.dev[i];
1920                 /* Unregister video device */
1921                 video_unregister_device(ch->video_dev);
1922
1923                 ch->video_dev = NULL;
1924         }
1925
1926         return 0;
1927 }
1928
1929 #ifdef CONFIG_PM
1930 static int vpif_suspend(struct device *dev)
1931 {
1932         struct common_obj *common;
1933         struct channel_obj *ch;
1934         int i;
1935
1936         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1937                 /* Get the pointer to the channel object */
1938                 ch = vpif_obj.dev[i];
1939                 common = &ch->common[VPIF_VIDEO_INDEX];
1940                 mutex_lock(&common->lock);
1941                 if (atomic_read(&ch->usrs) && common->io_usrs) {
1942                         /* Disable channel */
1943                         if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1944                                 enable_channel2(0);
1945                                 channel2_intr_enable(0);
1946                         }
1947                         if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1948                                         common->started == 2) {
1949                                 enable_channel3(0);
1950                                 channel3_intr_enable(0);
1951                         }
1952                 }
1953                 mutex_unlock(&common->lock);
1954         }
1955
1956         return 0;
1957 }
1958
1959 static int vpif_resume(struct device *dev)
1960 {
1961
1962         struct common_obj *common;
1963         struct channel_obj *ch;
1964         int i;
1965
1966         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1967                 /* Get the pointer to the channel object */
1968                 ch = vpif_obj.dev[i];
1969                 common = &ch->common[VPIF_VIDEO_INDEX];
1970                 mutex_lock(&common->lock);
1971                 if (atomic_read(&ch->usrs) && common->io_usrs) {
1972                         /* Enable channel */
1973                         if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1974                                 enable_channel2(1);
1975                                 channel2_intr_enable(1);
1976                         }
1977                         if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1978                                         common->started == 2) {
1979                                 enable_channel3(1);
1980                                 channel3_intr_enable(1);
1981                         }
1982                 }
1983                 mutex_unlock(&common->lock);
1984         }
1985
1986         return 0;
1987 }
1988
1989 static const struct dev_pm_ops vpif_pm = {
1990         .suspend        = vpif_suspend,
1991         .resume         = vpif_resume,
1992 };
1993
1994 #define vpif_pm_ops (&vpif_pm)
1995 #else
1996 #define vpif_pm_ops NULL
1997 #endif
1998
1999 static __refdata struct platform_driver vpif_driver = {
2000         .driver = {
2001                         .name   = "vpif_display",
2002                         .owner  = THIS_MODULE,
2003                         .pm     = vpif_pm_ops,
2004         },
2005         .probe  = vpif_probe,
2006         .remove = vpif_remove,
2007 };
2008
2009 static __init int vpif_init(void)
2010 {
2011         return platform_driver_register(&vpif_driver);
2012 }
2013
2014 /*
2015  * vpif_cleanup: This function un-registers device and driver to the kernel,
2016  * frees requested irq handler and de-allocates memory allocated for channel
2017  * objects.
2018  */
2019 static void vpif_cleanup(void)
2020 {
2021         struct platform_device *pdev;
2022         struct resource *res;
2023         int irq_num;
2024         int i = 0;
2025
2026         pdev = container_of(vpif_dev, struct platform_device, dev);
2027
2028         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) {
2029                 for (irq_num = res->start; irq_num <= res->end; irq_num++)
2030                         free_irq(irq_num,
2031                                  (void *)(&vpif_obj.dev[i]->channel_id));
2032                 i++;
2033         }
2034
2035         platform_driver_unregister(&vpif_driver);
2036         kfree(vpif_obj.sd);
2037         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++)
2038                 kfree(vpif_obj.dev[i]);
2039 }
2040
2041 module_init(vpif_init);
2042 module_exit(vpif_cleanup);