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 = &vpif_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         q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1005
1006         ret = vb2_queue_init(q);
1007         if (ret) {
1008                 vpif_err("vpif_display: vb2_queue_init() failed\n");
1009                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1010                 return ret;
1011         }
1012         /* Set io allowed member of file handle to TRUE */
1013         fh->io_allowed[index] = 1;
1014         /* Increment io usrs member of channel object to 1 */
1015         common->io_usrs = 1;
1016         /* Store type of memory requested in channel object */
1017         common->memory = reqbuf->memory;
1018         INIT_LIST_HEAD(&common->dma_queue);
1019         /* Allocate buffers */
1020         return vb2_reqbufs(&common->buffer_queue, reqbuf);
1021 }
1022
1023 static int vpif_querybuf(struct file *file, void *priv,
1024                                 struct v4l2_buffer *tbuf)
1025 {
1026         struct vpif_fh *fh = priv;
1027         struct channel_obj *ch = fh->channel;
1028         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1029
1030         if (common->fmt.type != tbuf->type)
1031                 return -EINVAL;
1032
1033         return vb2_querybuf(&common->buffer_queue, tbuf);
1034 }
1035
1036 static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
1037 {
1038         struct vpif_fh *fh = NULL;
1039         struct channel_obj *ch = NULL;
1040         struct common_obj *common = NULL;
1041
1042         if (!buf || !priv)
1043                 return -EINVAL;
1044
1045         fh = priv;
1046         ch = fh->channel;
1047         if (!ch)
1048                 return -EINVAL;
1049
1050         common = &(ch->common[VPIF_VIDEO_INDEX]);
1051         if (common->fmt.type != buf->type)
1052                 return -EINVAL;
1053
1054         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1055                 vpif_err("fh->io_allowed\n");
1056                 return -EACCES;
1057         }
1058
1059         return vb2_qbuf(&common->buffer_queue, buf);
1060 }
1061
1062 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
1063 {
1064         struct vpif_fh *fh = priv;
1065         struct channel_obj *ch = fh->channel;
1066         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1067         int ret = 0;
1068
1069         if (!(std_id & VPIF_V4L2_STD))
1070                 return -EINVAL;
1071
1072         if (common->started) {
1073                 vpif_err("streaming in progress\n");
1074                 return -EBUSY;
1075         }
1076
1077         /* Call encoder subdevice function to set the standard */
1078         ch->video.stdid = std_id;
1079         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1080         /* Get the information about the standard */
1081         if (vpif_update_resolution(ch))
1082                 return -EINVAL;
1083
1084         if ((ch->vpifparams.std_info.width *
1085                 ch->vpifparams.std_info.height * 2) >
1086                 config_params.channel_bufsize[ch->channel_id]) {
1087                 vpif_err("invalid std for this size\n");
1088                 return -EINVAL;
1089         }
1090
1091         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
1092         /* Configure the default format information */
1093         vpif_config_format(ch);
1094
1095         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
1096                                                 s_std_output, std_id);
1097         if (ret < 0) {
1098                 vpif_err("Failed to set output standard\n");
1099                 return ret;
1100         }
1101
1102         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, core,
1103                                                         s_std, std_id);
1104         if (ret < 0)
1105                 vpif_err("Failed to set standard for sub devices\n");
1106         return ret;
1107 }
1108
1109 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1110 {
1111         struct vpif_fh *fh = priv;
1112         struct channel_obj *ch = fh->channel;
1113
1114         *std = ch->video.stdid;
1115         return 0;
1116 }
1117
1118 static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
1119 {
1120         struct vpif_fh *fh = priv;
1121         struct channel_obj *ch = fh->channel;
1122         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1123
1124         return vb2_dqbuf(&common->buffer_queue, p,
1125                                         (file->f_flags & O_NONBLOCK));
1126 }
1127
1128 static int vpif_streamon(struct file *file, void *priv,
1129                                 enum v4l2_buf_type buftype)
1130 {
1131         struct vpif_fh *fh = priv;
1132         struct channel_obj *ch = fh->channel;
1133         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1134         struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1135         int ret = 0;
1136
1137         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1138                 vpif_err("buffer type not supported\n");
1139                 return -EINVAL;
1140         }
1141
1142         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1143                 vpif_err("fh->io_allowed\n");
1144                 return -EACCES;
1145         }
1146
1147         /* If Streaming is already started, return error */
1148         if (common->started) {
1149                 vpif_err("channel->started\n");
1150                 return -EBUSY;
1151         }
1152
1153         if ((ch->channel_id == VPIF_CHANNEL2_VIDEO
1154                 && oth_ch->common[VPIF_VIDEO_INDEX].started &&
1155                 ch->vpifparams.std_info.ycmux_mode == 0)
1156                 || ((ch->channel_id == VPIF_CHANNEL3_VIDEO)
1157                 && (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1158                 vpif_err("other channel is using\n");
1159                 return -EBUSY;
1160         }
1161
1162         ret = vpif_check_format(ch, &common->fmt.fmt.pix);
1163         if (ret < 0)
1164                 return ret;
1165
1166         /* Call vb2_streamon to start streaming in videobuf2 */
1167         ret = vb2_streamon(&common->buffer_queue, buftype);
1168         if (ret < 0) {
1169                 vpif_err("vb2_streamon\n");
1170                 return ret;
1171         }
1172
1173         return ret;
1174 }
1175
1176 static int vpif_streamoff(struct file *file, void *priv,
1177                                 enum v4l2_buf_type buftype)
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         struct vpif_display_config *vpif_config_data =
1183                                         vpif_dev->platform_data;
1184
1185         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1186                 vpif_err("buffer type not supported\n");
1187                 return -EINVAL;
1188         }
1189
1190         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1191                 vpif_err("fh->io_allowed\n");
1192                 return -EACCES;
1193         }
1194
1195         if (!common->started) {
1196                 vpif_err("channel->started\n");
1197                 return -EINVAL;
1198         }
1199
1200         if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1201                 /* disable channel */
1202                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
1203                         if (vpif_config_data->
1204                                 chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
1205                                 channel2_clipping_enable(0);
1206                         enable_channel2(0);
1207                         channel2_intr_enable(0);
1208                 }
1209                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
1210                                         (2 == common->started)) {
1211                         if (vpif_config_data->
1212                                 chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
1213                                 channel3_clipping_enable(0);
1214                         enable_channel3(0);
1215                         channel3_intr_enable(0);
1216                 }
1217         }
1218
1219         common->started = 0;
1220         return vb2_streamoff(&common->buffer_queue, buftype);
1221 }
1222
1223 static int vpif_cropcap(struct file *file, void *priv,
1224                         struct v4l2_cropcap *crop)
1225 {
1226         struct vpif_fh *fh = priv;
1227         struct channel_obj *ch = fh->channel;
1228         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1229         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != crop->type)
1230                 return -EINVAL;
1231
1232         crop->bounds.left = crop->bounds.top = 0;
1233         crop->defrect.left = crop->defrect.top = 0;
1234         crop->defrect.height = crop->bounds.height = common->height;
1235         crop->defrect.width = crop->bounds.width = common->width;
1236
1237         return 0;
1238 }
1239
1240 static int vpif_enum_output(struct file *file, void *fh,
1241                                 struct v4l2_output *output)
1242 {
1243
1244         struct vpif_display_config *config = vpif_dev->platform_data;
1245         struct vpif_display_chan_config *chan_cfg;
1246         struct vpif_fh *vpif_handler = fh;
1247         struct channel_obj *ch = vpif_handler->channel;
1248
1249         chan_cfg = &config->chan_config[ch->channel_id];
1250         if (output->index >= chan_cfg->output_count) {
1251                 vpif_dbg(1, debug, "Invalid output index\n");
1252                 return -EINVAL;
1253         }
1254
1255         *output = chan_cfg->outputs[output->index].output;
1256         return 0;
1257 }
1258
1259 /**
1260  * vpif_output_to_subdev() - Maps output to sub device
1261  * @vpif_cfg - global config ptr
1262  * @chan_cfg - channel config ptr
1263  * @index - Given output index from application
1264  *
1265  * lookup the sub device information for a given output index.
1266  * we report all the output to application. output table also
1267  * has sub device name for the each output
1268  */
1269 static int
1270 vpif_output_to_subdev(struct vpif_display_config *vpif_cfg,
1271                       struct vpif_display_chan_config *chan_cfg, int index)
1272 {
1273         struct vpif_subdev_info *subdev_info;
1274         const char *subdev_name;
1275         int i;
1276
1277         vpif_dbg(2, debug, "vpif_output_to_subdev\n");
1278
1279         if (chan_cfg->outputs == NULL)
1280                 return -1;
1281
1282         subdev_name = chan_cfg->outputs[index].subdev_name;
1283         if (subdev_name == NULL)
1284                 return -1;
1285
1286         /* loop through the sub device list to get the sub device info */
1287         for (i = 0; i < vpif_cfg->subdev_count; i++) {
1288                 subdev_info = &vpif_cfg->subdevinfo[i];
1289                 if (!strcmp(subdev_info->name, subdev_name))
1290                         return i;
1291         }
1292         return -1;
1293 }
1294
1295 /**
1296  * vpif_set_output() - Select an output
1297  * @vpif_cfg - global config ptr
1298  * @ch - channel
1299  * @index - Given output index from application
1300  *
1301  * Select the given output.
1302  */
1303 static int vpif_set_output(struct vpif_display_config *vpif_cfg,
1304                       struct channel_obj *ch, int index)
1305 {
1306         struct vpif_display_chan_config *chan_cfg =
1307                 &vpif_cfg->chan_config[ch->channel_id];
1308         struct vpif_subdev_info *subdev_info = NULL;
1309         struct v4l2_subdev *sd = NULL;
1310         u32 input = 0, output = 0;
1311         int sd_index;
1312         int ret;
1313
1314         sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
1315         if (sd_index >= 0) {
1316                 sd = vpif_obj.sd[sd_index];
1317                 subdev_info = &vpif_cfg->subdevinfo[sd_index];
1318         }
1319
1320         if (sd) {
1321                 input = chan_cfg->outputs[index].input_route;
1322                 output = chan_cfg->outputs[index].output_route;
1323                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
1324                 if (ret < 0 && ret != -ENOIOCTLCMD) {
1325                         vpif_err("Failed to set output\n");
1326                         return ret;
1327                 }
1328
1329         }
1330         ch->output_idx = index;
1331         ch->sd = sd;
1332         if (chan_cfg->outputs != NULL)
1333                 /* update tvnorms from the sub device output info */
1334                 ch->video_dev->tvnorms = chan_cfg->outputs[index].output.std;
1335         return 0;
1336 }
1337
1338 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
1339 {
1340         struct vpif_display_config *config = vpif_dev->platform_data;
1341         struct vpif_display_chan_config *chan_cfg;
1342         struct vpif_fh *fh = priv;
1343         struct channel_obj *ch = fh->channel;
1344         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1345
1346         chan_cfg = &config->chan_config[ch->channel_id];
1347
1348         if (i >= chan_cfg->output_count)
1349                 return -EINVAL;
1350
1351         if (common->started) {
1352                 vpif_err("Streaming in progress\n");
1353                 return -EBUSY;
1354         }
1355
1356         return vpif_set_output(config, ch, i);
1357 }
1358
1359 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
1360 {
1361         struct vpif_fh *fh = priv;
1362         struct channel_obj *ch = fh->channel;
1363
1364         *i = ch->output_idx;
1365
1366         return 0;
1367 }
1368
1369 static int vpif_g_priority(struct file *file, void *priv, enum v4l2_priority *p)
1370 {
1371         struct vpif_fh *fh = priv;
1372         struct channel_obj *ch = fh->channel;
1373
1374         *p = v4l2_prio_max(&ch->prio);
1375
1376         return 0;
1377 }
1378
1379 static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1380 {
1381         struct vpif_fh *fh = priv;
1382         struct channel_obj *ch = fh->channel;
1383
1384         return v4l2_prio_change(&ch->prio, &fh->prio, p);
1385 }
1386
1387 /**
1388  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
1389  * @file: file ptr
1390  * @priv: file handle
1391  * @timings: input timings
1392  */
1393 static int
1394 vpif_enum_dv_timings(struct file *file, void *priv,
1395                      struct v4l2_enum_dv_timings *timings)
1396 {
1397         struct vpif_fh *fh = priv;
1398         struct channel_obj *ch = fh->channel;
1399         int ret;
1400
1401         ret = v4l2_subdev_call(ch->sd, video, enum_dv_timings, timings);
1402         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1403                 return -EINVAL;
1404         return ret;
1405 }
1406
1407 /**
1408  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1409  * @file: file ptr
1410  * @priv: file handle
1411  * @timings: digital video timings
1412  */
1413 static int vpif_s_dv_timings(struct file *file, void *priv,
1414                 struct v4l2_dv_timings *timings)
1415 {
1416         struct vpif_fh *fh = priv;
1417         struct channel_obj *ch = fh->channel;
1418         struct vpif_params *vpifparams = &ch->vpifparams;
1419         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1420         struct video_obj *vid_ch = &ch->video;
1421         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
1422         int ret;
1423
1424         if (timings->type != V4L2_DV_BT_656_1120) {
1425                 vpif_dbg(2, debug, "Timing type not defined\n");
1426                 return -EINVAL;
1427         }
1428
1429         /* Configure subdevice timings, if any */
1430         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
1431         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1432                 ret = 0;
1433         if (ret < 0) {
1434                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1435                 return ret;
1436         }
1437
1438         if (!(timings->bt.width && timings->bt.height &&
1439                                 (timings->bt.hbackporch ||
1440                                  timings->bt.hfrontporch ||
1441                                  timings->bt.hsync) &&
1442                                 timings->bt.vfrontporch &&
1443                                 (timings->bt.vbackporch ||
1444                                  timings->bt.vsync))) {
1445                 vpif_dbg(2, debug, "Timings for width, height, "
1446                                 "horizontal back porch, horizontal sync, "
1447                                 "horizontal front porch, vertical back porch, "
1448                                 "vertical sync and vertical back porch "
1449                                 "must be defined\n");
1450                 return -EINVAL;
1451         }
1452
1453         vid_ch->dv_timings = *timings;
1454
1455         /* Configure video port timings */
1456
1457         std_info->eav2sav = bt->hbackporch + bt->hfrontporch +
1458                 bt->hsync - 8;
1459         std_info->sav2eav = bt->width;
1460
1461         std_info->l1 = 1;
1462         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1463
1464         if (bt->interlaced) {
1465                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1466                         std_info->vsize = bt->height * 2 +
1467                                 bt->vfrontporch + bt->vsync + bt->vbackporch +
1468                                 bt->il_vfrontporch + bt->il_vsync +
1469                                 bt->il_vbackporch;
1470                         std_info->l5 = std_info->vsize/2 -
1471                                 (bt->vfrontporch - 1);
1472                         std_info->l7 = std_info->vsize/2 + 1;
1473                         std_info->l9 = std_info->l7 + bt->il_vsync +
1474                                 bt->il_vbackporch + 1;
1475                         std_info->l11 = std_info->vsize -
1476                                 (bt->il_vfrontporch - 1);
1477                 } else {
1478                         vpif_dbg(2, debug, "Required timing values for "
1479                                         "interlaced BT format missing\n");
1480                         return -EINVAL;
1481                 }
1482         } else {
1483                 std_info->vsize = bt->height + bt->vfrontporch +
1484                         bt->vsync + bt->vbackporch;
1485                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1486         }
1487         strncpy(std_info->name, "Custom timings BT656/1120",
1488                         VPIF_MAX_NAME);
1489         std_info->width = bt->width;
1490         std_info->height = bt->height;
1491         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1492         std_info->ycmux_mode = 0;
1493         std_info->capture_format = 0;
1494         std_info->vbi_supported = 0;
1495         std_info->hd_sd = 1;
1496         std_info->stdid = 0;
1497         vid_ch->stdid = 0;
1498
1499         return 0;
1500 }
1501
1502 /**
1503  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1504  * @file: file ptr
1505  * @priv: file handle
1506  * @timings: digital video timings
1507  */
1508 static int vpif_g_dv_timings(struct file *file, void *priv,
1509                 struct v4l2_dv_timings *timings)
1510 {
1511         struct vpif_fh *fh = priv;
1512         struct channel_obj *ch = fh->channel;
1513         struct video_obj *vid_ch = &ch->video;
1514
1515         *timings = vid_ch->dv_timings;
1516
1517         return 0;
1518 }
1519
1520 /*
1521  * vpif_g_chip_ident() - Identify the chip
1522  * @file: file ptr
1523  * @priv: file handle
1524  * @chip: chip identity
1525  *
1526  * Returns zero or -EINVAL if read operations fails.
1527  */
1528 static int vpif_g_chip_ident(struct file *file, void *priv,
1529                 struct v4l2_dbg_chip_ident *chip)
1530 {
1531         chip->ident = V4L2_IDENT_NONE;
1532         chip->revision = 0;
1533         if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
1534                         chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR) {
1535                 vpif_dbg(2, debug, "match_type is invalid.\n");
1536                 return -EINVAL;
1537         }
1538
1539         return v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 0, core,
1540                         g_chip_ident, chip);
1541 }
1542
1543 #ifdef CONFIG_VIDEO_ADV_DEBUG
1544 /*
1545  * vpif_dbg_g_register() - Read register
1546  * @file: file ptr
1547  * @priv: file handle
1548  * @reg: register to be read
1549  *
1550  * Debugging only
1551  * Returns zero or -EINVAL if read operations fails.
1552  */
1553 static int vpif_dbg_g_register(struct file *file, void *priv,
1554                 struct v4l2_dbg_register *reg){
1555         struct vpif_fh *fh = priv;
1556         struct channel_obj *ch = fh->channel;
1557
1558         return v4l2_subdev_call(ch->sd, core, g_register, reg);
1559 }
1560
1561 /*
1562  * vpif_dbg_s_register() - Write to register
1563  * @file: file ptr
1564  * @priv: file handle
1565  * @reg: register to be modified
1566  *
1567  * Debugging only
1568  * Returns zero or -EINVAL if write operations fails.
1569  */
1570 static int vpif_dbg_s_register(struct file *file, void *priv,
1571                 struct v4l2_dbg_register *reg){
1572         struct vpif_fh *fh = priv;
1573         struct channel_obj *ch = fh->channel;
1574
1575         return v4l2_subdev_call(ch->sd, core, s_register, reg);
1576 }
1577 #endif
1578
1579 /*
1580  * vpif_log_status() - Status information
1581  * @file: file ptr
1582  * @priv: file handle
1583  *
1584  * Returns zero.
1585  */
1586 static int vpif_log_status(struct file *filep, void *priv)
1587 {
1588         /* status for sub devices */
1589         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1590
1591         return 0;
1592 }
1593
1594 /* vpif display ioctl operations */
1595 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1596         .vidioc_querycap                = vpif_querycap,
1597         .vidioc_g_priority              = vpif_g_priority,
1598         .vidioc_s_priority              = vpif_s_priority,
1599         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1600         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1601         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1602         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1603         .vidioc_reqbufs                 = vpif_reqbufs,
1604         .vidioc_querybuf                = vpif_querybuf,
1605         .vidioc_qbuf                    = vpif_qbuf,
1606         .vidioc_dqbuf                   = vpif_dqbuf,
1607         .vidioc_streamon                = vpif_streamon,
1608         .vidioc_streamoff               = vpif_streamoff,
1609         .vidioc_s_std                   = vpif_s_std,
1610         .vidioc_g_std                   = vpif_g_std,
1611         .vidioc_enum_output             = vpif_enum_output,
1612         .vidioc_s_output                = vpif_s_output,
1613         .vidioc_g_output                = vpif_g_output,
1614         .vidioc_cropcap                 = vpif_cropcap,
1615         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1616         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1617         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1618         .vidioc_g_chip_ident            = vpif_g_chip_ident,
1619 #ifdef CONFIG_VIDEO_ADV_DEBUG
1620         .vidioc_g_register              = vpif_dbg_g_register,
1621         .vidioc_s_register              = vpif_dbg_s_register,
1622 #endif
1623         .vidioc_log_status              = vpif_log_status,
1624 };
1625
1626 static const struct v4l2_file_operations vpif_fops = {
1627         .owner          = THIS_MODULE,
1628         .open           = vpif_open,
1629         .release        = vpif_release,
1630         .unlocked_ioctl = video_ioctl2,
1631         .mmap           = vpif_mmap,
1632         .poll           = vpif_poll
1633 };
1634
1635 static struct video_device vpif_video_template = {
1636         .name           = "vpif",
1637         .fops           = &vpif_fops,
1638         .ioctl_ops      = &vpif_ioctl_ops,
1639 };
1640
1641 /*Configure the channels, buffer sizei, request irq */
1642 static int initialize_vpif(void)
1643 {
1644         int free_channel_objects_index;
1645         int free_buffer_channel_index;
1646         int free_buffer_index;
1647         int err = 0, i, j;
1648
1649         /* Default number of buffers should be 3 */
1650         if ((ch2_numbuffers > 0) &&
1651             (ch2_numbuffers < config_params.min_numbuffers))
1652                 ch2_numbuffers = config_params.min_numbuffers;
1653         if ((ch3_numbuffers > 0) &&
1654             (ch3_numbuffers < config_params.min_numbuffers))
1655                 ch3_numbuffers = config_params.min_numbuffers;
1656
1657         /* Set buffer size to min buffers size if invalid buffer size is
1658          * given */
1659         if (ch2_bufsize < config_params.min_bufsize[VPIF_CHANNEL2_VIDEO])
1660                 ch2_bufsize =
1661                     config_params.min_bufsize[VPIF_CHANNEL2_VIDEO];
1662         if (ch3_bufsize < config_params.min_bufsize[VPIF_CHANNEL3_VIDEO])
1663                 ch3_bufsize =
1664                     config_params.min_bufsize[VPIF_CHANNEL3_VIDEO];
1665
1666         config_params.numbuffers[VPIF_CHANNEL2_VIDEO] = ch2_numbuffers;
1667
1668         if (ch2_numbuffers) {
1669                 config_params.channel_bufsize[VPIF_CHANNEL2_VIDEO] =
1670                                                         ch2_bufsize;
1671         }
1672         config_params.numbuffers[VPIF_CHANNEL3_VIDEO] = ch3_numbuffers;
1673
1674         if (ch3_numbuffers) {
1675                 config_params.channel_bufsize[VPIF_CHANNEL3_VIDEO] =
1676                                                         ch3_bufsize;
1677         }
1678
1679         /* Allocate memory for six channel objects */
1680         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1681                 vpif_obj.dev[i] =
1682                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1683                 /* If memory allocation fails, return error */
1684                 if (!vpif_obj.dev[i]) {
1685                         free_channel_objects_index = i;
1686                         err = -ENOMEM;
1687                         goto vpif_init_free_channel_objects;
1688                 }
1689         }
1690
1691         free_channel_objects_index = VPIF_DISPLAY_MAX_DEVICES;
1692         free_buffer_channel_index = VPIF_DISPLAY_NUM_CHANNELS;
1693         free_buffer_index = config_params.numbuffers[i - 1];
1694
1695         return 0;
1696
1697 vpif_init_free_channel_objects:
1698         for (j = 0; j < free_channel_objects_index; j++)
1699                 kfree(vpif_obj.dev[j]);
1700         return err;
1701 }
1702
1703 /*
1704  * vpif_probe: This function creates device entries by register itself to the
1705  * V4L2 driver and initializes fields of each channel objects
1706  */
1707 static __init int vpif_probe(struct platform_device *pdev)
1708 {
1709         struct vpif_subdev_info *subdevdata;
1710         struct vpif_display_config *config;
1711         int i, j = 0, k, err = 0;
1712         int res_idx = 0;
1713         struct i2c_adapter *i2c_adap;
1714         struct common_obj *common;
1715         struct channel_obj *ch;
1716         struct video_device *vfd;
1717         struct resource *res;
1718         int subdev_count;
1719         size_t size;
1720
1721         vpif_dev = &pdev->dev;
1722         err = initialize_vpif();
1723
1724         if (err) {
1725                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1726                 return err;
1727         }
1728
1729         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1730         if (err) {
1731                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1732                 return err;
1733         }
1734
1735         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1736                 for (i = res->start; i <= res->end; i++) {
1737                         if (request_irq(i, vpif_channel_isr, IRQF_SHARED,
1738                                         "VPIF_Display", (void *)
1739                                         (&vpif_obj.dev[res_idx]->channel_id))) {
1740                                 err = -EBUSY;
1741                                 for (j = 0; j < i; j++)
1742                                         free_irq(j, (void *)
1743                                         (&vpif_obj.dev[res_idx]->channel_id));
1744                                 goto vpif_int_err;
1745                         }
1746                 }
1747                 res_idx++;
1748         }
1749
1750         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1751                 /* Get the pointer to the channel object */
1752                 ch = vpif_obj.dev[i];
1753
1754                 /* Allocate memory for video device */
1755                 vfd = video_device_alloc();
1756                 if (vfd == NULL) {
1757                         for (j = 0; j < i; j++) {
1758                                 ch = vpif_obj.dev[j];
1759                                 video_device_release(ch->video_dev);
1760                         }
1761                         err = -ENOMEM;
1762                         goto vpif_int_err;
1763                 }
1764
1765                 /* Initialize field of video device */
1766                 *vfd = vpif_video_template;
1767                 vfd->v4l2_dev = &vpif_obj.v4l2_dev;
1768                 vfd->release = video_device_release;
1769                 vfd->vfl_dir = VFL_DIR_TX;
1770                 snprintf(vfd->name, sizeof(vfd->name),
1771                          "VPIF_Display_DRIVER_V%s",
1772                          VPIF_DISPLAY_VERSION);
1773
1774                 /* Set video_dev to the video device */
1775                 ch->video_dev = vfd;
1776         }
1777
1778         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1779         if (res) {
1780                 size = resource_size(res);
1781                 /* The resources are divided into two equal memory and when
1782                  * we have HD output we can add them together
1783                  */
1784                 for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1785                         ch = vpif_obj.dev[j];
1786                         ch->channel_id = j;
1787
1788                         /* only enabled if second resource exists */
1789                         config_params.video_limit[ch->channel_id] = 0;
1790                         if (size)
1791                                 config_params.video_limit[ch->channel_id] =
1792                                                                         size/2;
1793                 }
1794         }
1795
1796         i2c_adap = i2c_get_adapter(1);
1797         config = pdev->dev.platform_data;
1798         subdev_count = config->subdev_count;
1799         subdevdata = config->subdevinfo;
1800         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1801                                                                 GFP_KERNEL);
1802         if (vpif_obj.sd == NULL) {
1803                 vpif_err("unable to allocate memory for subdevice pointers\n");
1804                 err = -ENOMEM;
1805                 goto vpif_sd_error;
1806         }
1807
1808         for (i = 0; i < subdev_count; i++) {
1809                 vpif_obj.sd[i] = v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1810                                                 i2c_adap,
1811                                                 &subdevdata[i].board_info,
1812                                                 NULL);
1813                 if (!vpif_obj.sd[i]) {
1814                         vpif_err("Error registering v4l2 subdevice\n");
1815                         goto probe_subdev_out;
1816                 }
1817
1818                 if (vpif_obj.sd[i])
1819                         vpif_obj.sd[i]->grp_id = 1 << i;
1820         }
1821
1822         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1823                 ch = vpif_obj.dev[j];
1824                 /* Initialize field of the channel objects */
1825                 atomic_set(&ch->usrs, 0);
1826                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1827                         ch->common[k].numbuffers = 0;
1828                         common = &ch->common[k];
1829                         common->io_usrs = 0;
1830                         common->started = 0;
1831                         spin_lock_init(&common->irqlock);
1832                         mutex_init(&common->lock);
1833                         common->numbuffers = 0;
1834                         common->set_addr = NULL;
1835                         common->ytop_off = common->ybtm_off = 0;
1836                         common->ctop_off = common->cbtm_off = 0;
1837                         common->cur_frm = common->next_frm = NULL;
1838                         memset(&common->fmt, 0, sizeof(common->fmt));
1839                         common->numbuffers = config_params.numbuffers[k];
1840
1841                 }
1842                 ch->initialized = 0;
1843                 if (subdev_count)
1844                         ch->sd = vpif_obj.sd[0];
1845                 ch->channel_id = j;
1846                 if (j < 2)
1847                         ch->common[VPIF_VIDEO_INDEX].numbuffers =
1848                             config_params.numbuffers[ch->channel_id];
1849                 else
1850                         ch->common[VPIF_VIDEO_INDEX].numbuffers = 0;
1851
1852                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1853
1854                 /* Initialize prio member of channel object */
1855                 v4l2_prio_init(&ch->prio);
1856                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1857                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1858                 ch->video_dev->lock = &common->lock;
1859                 video_set_drvdata(ch->video_dev, ch);
1860
1861                 /* select output 0 */
1862                 err = vpif_set_output(config, ch, 0);
1863                 if (err)
1864                         goto probe_out;
1865
1866                 /* register video device */
1867                 vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
1868                                 (int)ch, (int)&ch->video_dev);
1869
1870                 err = video_register_device(ch->video_dev,
1871                                           VFL_TYPE_GRABBER, (j ? 3 : 2));
1872                 if (err < 0)
1873                         goto probe_out;
1874         }
1875
1876         v4l2_info(&vpif_obj.v4l2_dev,
1877                         " VPIF display driver initialized\n");
1878         return 0;
1879
1880 probe_out:
1881         for (k = 0; k < j; k++) {
1882                 ch = vpif_obj.dev[k];
1883                 video_unregister_device(ch->video_dev);
1884                 video_device_release(ch->video_dev);
1885                 ch->video_dev = NULL;
1886         }
1887 probe_subdev_out:
1888         kfree(vpif_obj.sd);
1889 vpif_sd_error:
1890         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1891                 ch = vpif_obj.dev[i];
1892                 /* Note: does nothing if ch->video_dev == NULL */
1893                 video_device_release(ch->video_dev);
1894         }
1895 vpif_int_err:
1896         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1897         vpif_err("VPIF IRQ request failed\n");
1898         for (i = 0; i < res_idx; i++) {
1899                 res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
1900                 for (j = res->start; j <= res->end; j++)
1901                         free_irq(j, (void *)(&vpif_obj.dev[i]->channel_id));
1902         }
1903
1904         return err;
1905 }
1906
1907 /*
1908  * vpif_remove: It un-register channels from V4L2 driver
1909  */
1910 static int vpif_remove(struct platform_device *device)
1911 {
1912         struct channel_obj *ch;
1913         int i;
1914
1915         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1916
1917         /* un-register device */
1918         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1919                 /* Get the pointer to the channel object */
1920                 ch = vpif_obj.dev[i];
1921                 /* Unregister video device */
1922                 video_unregister_device(ch->video_dev);
1923
1924                 ch->video_dev = NULL;
1925         }
1926
1927         return 0;
1928 }
1929
1930 #ifdef CONFIG_PM
1931 static int vpif_suspend(struct device *dev)
1932 {
1933         struct common_obj *common;
1934         struct channel_obj *ch;
1935         int i;
1936
1937         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1938                 /* Get the pointer to the channel object */
1939                 ch = vpif_obj.dev[i];
1940                 common = &ch->common[VPIF_VIDEO_INDEX];
1941                 mutex_lock(&common->lock);
1942                 if (atomic_read(&ch->usrs) && common->io_usrs) {
1943                         /* Disable channel */
1944                         if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1945                                 enable_channel2(0);
1946                                 channel2_intr_enable(0);
1947                         }
1948                         if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1949                                         common->started == 2) {
1950                                 enable_channel3(0);
1951                                 channel3_intr_enable(0);
1952                         }
1953                 }
1954                 mutex_unlock(&common->lock);
1955         }
1956
1957         return 0;
1958 }
1959
1960 static int vpif_resume(struct device *dev)
1961 {
1962
1963         struct common_obj *common;
1964         struct channel_obj *ch;
1965         int i;
1966
1967         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1968                 /* Get the pointer to the channel object */
1969                 ch = vpif_obj.dev[i];
1970                 common = &ch->common[VPIF_VIDEO_INDEX];
1971                 mutex_lock(&common->lock);
1972                 if (atomic_read(&ch->usrs) && common->io_usrs) {
1973                         /* Enable channel */
1974                         if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1975                                 enable_channel2(1);
1976                                 channel2_intr_enable(1);
1977                         }
1978                         if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1979                                         common->started == 2) {
1980                                 enable_channel3(1);
1981                                 channel3_intr_enable(1);
1982                         }
1983                 }
1984                 mutex_unlock(&common->lock);
1985         }
1986
1987         return 0;
1988 }
1989
1990 static const struct dev_pm_ops vpif_pm = {
1991         .suspend        = vpif_suspend,
1992         .resume         = vpif_resume,
1993 };
1994
1995 #define vpif_pm_ops (&vpif_pm)
1996 #else
1997 #define vpif_pm_ops NULL
1998 #endif
1999
2000 static __refdata struct platform_driver vpif_driver = {
2001         .driver = {
2002                         .name   = "vpif_display",
2003                         .owner  = THIS_MODULE,
2004                         .pm     = vpif_pm_ops,
2005         },
2006         .probe  = vpif_probe,
2007         .remove = vpif_remove,
2008 };
2009
2010 static __init int vpif_init(void)
2011 {
2012         return platform_driver_register(&vpif_driver);
2013 }
2014
2015 /*
2016  * vpif_cleanup: This function un-registers device and driver to the kernel,
2017  * frees requested irq handler and de-allocates memory allocated for channel
2018  * objects.
2019  */
2020 static void vpif_cleanup(void)
2021 {
2022         struct platform_device *pdev;
2023         struct resource *res;
2024         int irq_num;
2025         int i = 0;
2026
2027         pdev = container_of(vpif_dev, struct platform_device, dev);
2028
2029         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) {
2030                 for (irq_num = res->start; irq_num <= res->end; irq_num++)
2031                         free_irq(irq_num,
2032                                  (void *)(&vpif_obj.dev[i]->channel_id));
2033                 i++;
2034         }
2035
2036         platform_driver_unregister(&vpif_driver);
2037         kfree(vpif_obj.sd);
2038         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++)
2039                 kfree(vpif_obj.dev[i]);
2040 }
2041
2042 module_init(vpif_init);
2043 module_exit(vpif_cleanup);