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  * Copyright (C) 2014 Lad, Prabhakar <prabhakar.csengg@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation version 2.
  11  *
  12  * This program is distributed .as is. WITHOUT ANY WARRANTY of any
  13  * kind, whether express or implied; without even the implied warranty
  14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/interrupt.h>
  19 #include <linux/module.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/slab.h>
  22
  23 #include <media/v4l2-ioctl.h>
  24
  25 #include "vpif.h"
  26 #include "vpif_display.h"
  27
  28 MODULE_DESCRIPTION("TI DaVinci VPIF Display driver");
  29 MODULE_LICENSE("GPL");
  30 MODULE_VERSION(VPIF_DISPLAY_VERSION);
  31
  32 #define VPIF_V4L2_STD (V4L2_STD_525_60 | V4L2_STD_625_50)
  33
  34 #define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
  35 #define vpif_dbg(level, debug, fmt, arg...)     \
  36                 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
  37
  38 static int debug = 1;
  39
  40 module_param(debug, int, 0644);
  41
  42 MODULE_PARM_DESC(debug, "Debug level 0-1");
  43
  44 #define VPIF_DRIVER_NAME        "vpif_display"
  45
  46 /* Is set to 1 in case of SDTV formats, 2 in case of HDTV formats. */
  47 static int ycmux_mode;
  48
  49 static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
  50
  51 static struct vpif_device vpif_obj = { {NULL} };
  52 static struct device *vpif_dev;
  53 static void vpif_calculate_offsets(struct channel_obj *ch);
  54 static void vpif_config_addr(struct channel_obj *ch, int muxmode);
  55
  56 static inline
  57 struct vpif_disp_buffer *to_vpif_buffer(struct vb2_v4l2_buffer *vb)
  58 {
  59         return container_of(vb, struct vpif_disp_buffer, vb);
  60 }
  61
  62 /**
  63  * vpif_buffer_prepare :  callback function for buffer prepare
  64  * @vb: ptr to vb2_buffer
  65  *
  66  * This is the callback function for buffer prepare when vb2_qbuf()
  67  * function is called. The buffer is prepared and user space virtual address
  68  * or user address is converted into  physical address
  69  */
  70 static int vpif_buffer_prepare(struct vb2_buffer *vb)
  71 {
  72         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
  73         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
  74         struct common_obj *common;
  75
  76         common = &ch->common[VPIF_VIDEO_INDEX];
  77
  78         vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
  79         if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
  80                 return -EINVAL;
  81
  82         vbuf->field = common->fmt.fmt.pix.field;
  83
  84         if (vb->vb2_queue->type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) {
  85                 unsigned long addr = vb2_dma_contig_plane_dma_addr(vb, 0);
  86
  87                 if (!ISALIGNED(addr + common->ytop_off) ||
  88                         !ISALIGNED(addr + common->ybtm_off) ||
  89                         !ISALIGNED(addr + common->ctop_off) ||
  90                         !ISALIGNED(addr + common->cbtm_off)) {
  91                         vpif_err("buffer offset not aligned to 8 bytes\n");
  92                         return -EINVAL;
  93                 }
  94         }
  95
  96         return 0;
  97 }
  98
  99 /**
 100  * vpif_buffer_queue_setup : Callback function for buffer setup.
 101  * @vq: vb2_queue ptr
 102  * @fmt: v4l2 format
 103  * @nbuffers: ptr to number of buffers requested by application
 104  * @nplanes:: contains number of distinct video planes needed to hold a frame
 105  * @sizes[]: contains the size (in bytes) of each plane.
 106  * @alloc_ctxs: ptr to allocation context
 107  *
 108  * This callback function is called when reqbuf() is called to adjust
 109  * the buffer count and buffer size
 110  */
 111 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 112                                 const void *parg,
 113                                 unsigned int *nbuffers, unsigned int *nplanes,
 114                                 unsigned int sizes[], void *alloc_ctxs[])
 115 {
 116         const struct v4l2_format *fmt = parg;
 117         struct channel_obj *ch = vb2_get_drv_priv(vq);
 118         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 119
 120         if (fmt && fmt->fmt.pix.sizeimage < common->fmt.fmt.pix.sizeimage)
 121                 return -EINVAL;
 122
 123         if (vq->num_buffers + *nbuffers < 3)
 124                 *nbuffers = 3 - vq->num_buffers;
 125
 126         *nplanes = 1;
 127         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : common->fmt.fmt.pix.sizeimage;
 128         alloc_ctxs[0] = common->alloc_ctx;
 129
 130         /* Calculate the offset for Y and C data  in the buffer */
 131         vpif_calculate_offsets(ch);
 132
 133         return 0;
 134 }
 135
 136 /**
 137  * vpif_buffer_queue : Callback function to add buffer to DMA queue
 138  * @vb: ptr to vb2_buffer
 139  *
 140  * This callback fucntion queues the buffer to DMA engine
 141  */
 142 static void vpif_buffer_queue(struct vb2_buffer *vb)
 143 {
 144         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 145         struct vpif_disp_buffer *buf = to_vpif_buffer(vbuf);
 146         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
 147         struct common_obj *common;
 148         unsigned long flags;
 149
 150         common = &ch->common[VPIF_VIDEO_INDEX];
 151
 152         /* add the buffer to the DMA queue */
 153         spin_lock_irqsave(&common->irqlock, flags);
 154         list_add_tail(&buf->list, &common->dma_queue);
 155         spin_unlock_irqrestore(&common->irqlock, flags);
 156 }
 157
 158 /**
 159  * vpif_start_streaming : Starts the DMA engine for streaming
 160  * @vb: ptr to vb2_buffer
 161  * @count: number of buffers
 162  */
 163 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 164 {
 165         struct vpif_display_config *vpif_config_data =
 166                                         vpif_dev->platform_data;
 167         struct channel_obj *ch = vb2_get_drv_priv(vq);
 168         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 169         struct vpif_params *vpif = &ch->vpifparams;
 170         struct vpif_disp_buffer *buf, *tmp;
 171         unsigned long addr, flags;
 172         int ret;
 173
 174         spin_lock_irqsave(&common->irqlock, flags);
 175
 176         /* Initialize field_id */
 177         ch->field_id = 0;
 178
 179         /* clock settings */
 180         if (vpif_config_data->set_clock) {
 181                 ret = vpif_config_data->set_clock(ch->vpifparams.std_info.
 182                 ycmux_mode, ch->vpifparams.std_info.hd_sd);
 183                 if (ret < 0) {
 184                         vpif_err("can't set clock\n");
 185                         goto err;
 186                 }
 187         }
 188
 189         /* set the parameters and addresses */
 190         ret = vpif_set_video_params(vpif, ch->channel_id + 2);
 191         if (ret < 0)
 192                 goto err;
 193
 194         ycmux_mode = ret;
 195         vpif_config_addr(ch, ret);
 196         /* Get the next frame from the buffer queue */
 197         common->next_frm = common->cur_frm =
 198                             list_entry(common->dma_queue.next,
 199                                        struct vpif_disp_buffer, list);
 200
 201         list_del(&common->cur_frm->list);
 202         spin_unlock_irqrestore(&common->irqlock, flags);
 203
 204         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb.vb2_buf, 0);
 205         common->set_addr((addr + common->ytop_off),
 206                             (addr + common->ybtm_off),
 207                             (addr + common->ctop_off),
 208                             (addr + common->cbtm_off));
 209
 210         /*
 211          * Set interrupt for both the fields in VPIF
 212          * Register enable channel in VPIF register
 213          */
 214         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
 215         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 216                 channel2_intr_assert();
 217                 channel2_intr_enable(1);
 218                 enable_channel2(1);
 219                 if (vpif_config_data->chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
 220                         channel2_clipping_enable(1);
 221         }
 222
 223         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
 224                 channel3_intr_assert();
 225                 channel3_intr_enable(1);
 226                 enable_channel3(1);
 227                 if (vpif_config_data->chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
 228                         channel3_clipping_enable(1);
 229         }
 230
 231         return 0;
 232
 233 err:
 234         list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
 235                 list_del(&buf->list);
 236                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
 237         }
 238         spin_unlock_irqrestore(&common->irqlock, flags);
 239
 240         return ret;
 241 }
 242
 243 /**
 244  * vpif_stop_streaming : Stop the DMA engine
 245  * @vq: ptr to vb2_queue
 246  *
 247  * This callback stops the DMA engine and any remaining buffers
 248  * in the DMA queue are released.
 249  */
 250 static void vpif_stop_streaming(struct vb2_queue *vq)
 251 {
 252         struct channel_obj *ch = vb2_get_drv_priv(vq);
 253         struct common_obj *common;
 254         unsigned long flags;
 255
 256         common = &ch->common[VPIF_VIDEO_INDEX];
 257
 258         /* Disable channel */
 259         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 260                 enable_channel2(0);
 261                 channel2_intr_enable(0);
 262         }
 263         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
 264                 enable_channel3(0);
 265                 channel3_intr_enable(0);
 266         }
 267
 268         /* release all active buffers */
 269         spin_lock_irqsave(&common->irqlock, flags);
 270         if (common->cur_frm == common->next_frm) {
 271                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 272                                 VB2_BUF_STATE_ERROR);
 273         } else {
 274                 if (common->cur_frm != NULL)
 275                         vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 276                                         VB2_BUF_STATE_ERROR);
 277                 if (common->next_frm != NULL)
 278                         vb2_buffer_done(&common->next_frm->vb.vb2_buf,
 279                                         VB2_BUF_STATE_ERROR);
 280         }
 281
 282         while (!list_empty(&common->dma_queue)) {
 283                 common->next_frm = list_entry(common->dma_queue.next,
 284                                                 struct vpif_disp_buffer, list);
 285                 list_del(&common->next_frm->list);
 286                 vb2_buffer_done(&common->next_frm->vb.vb2_buf,
 287                                 VB2_BUF_STATE_ERROR);
 288         }
 289         spin_unlock_irqrestore(&common->irqlock, flags);
 290 }
 291
 292 static struct vb2_ops video_qops = {
 293         .queue_setup            = vpif_buffer_queue_setup,
 294         .wait_prepare           = vb2_ops_wait_prepare,
 295         .wait_finish            = vb2_ops_wait_finish,
 296         .buf_prepare            = vpif_buffer_prepare,
 297         .start_streaming        = vpif_start_streaming,
 298         .stop_streaming         = vpif_stop_streaming,
 299         .buf_queue              = vpif_buffer_queue,
 300 };
 301
 302 static void process_progressive_mode(struct common_obj *common)
 303 {
 304         unsigned long addr = 0;
 305
 306         spin_lock(&common->irqlock);
 307         /* Get the next buffer from buffer queue */
 308         common->next_frm = list_entry(common->dma_queue.next,
 309                                 struct vpif_disp_buffer, list);
 310         /* Remove that buffer from the buffer queue */
 311         list_del(&common->next_frm->list);
 312         spin_unlock(&common->irqlock);
 313
 314         /* Set top and bottom field addrs in VPIF registers */
 315         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb.vb2_buf, 0);
 316         common->set_addr(addr + common->ytop_off,
 317                                  addr + common->ybtm_off,
 318                                  addr + common->ctop_off,
 319                                  addr + common->cbtm_off);
 320 }
 321
 322 static void process_interlaced_mode(int fid, struct common_obj *common)
 323 {
 324         /* device field id and local field id are in sync */
 325         /* If this is even field */
 326         if (0 == fid) {
 327                 if (common->cur_frm == common->next_frm)
 328                         return;
 329
 330                 /* one frame is displayed If next frame is
 331                  *  available, release cur_frm and move on */
 332                 /* Copy frame display time */
 333                 v4l2_get_timestamp(&common->cur_frm->vb.timestamp);
 334                 /* Change status of the cur_frm */
 335                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 336                                         VB2_BUF_STATE_DONE);
 337                 /* Make cur_frm pointing to next_frm */
 338                 common->cur_frm = common->next_frm;
 339
 340         } else if (1 == fid) {  /* odd field */
 341                 spin_lock(&common->irqlock);
 342                 if (list_empty(&common->dma_queue)
 343                     || (common->cur_frm != common->next_frm)) {
 344                         spin_unlock(&common->irqlock);
 345                         return;
 346                 }
 347                 spin_unlock(&common->irqlock);
 348                 /* one field is displayed configure the next
 349                  * frame if it is available else hold on current
 350                  * frame */
 351                 /* Get next from the buffer queue */
 352                 process_progressive_mode(common);
 353         }
 354 }
 355
 356 /*
 357  * vpif_channel_isr: It changes status of the displayed buffer, takes next
 358  * buffer from the queue and sets its address in VPIF registers
 359  */
 360 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 361 {
 362         struct vpif_device *dev = &vpif_obj;
 363         struct channel_obj *ch;
 364         struct common_obj *common;
 365         int fid = -1, i;
 366         int channel_id = 0;
 367
 368         channel_id = *(int *)(dev_id);
 369         if (!vpif_intr_status(channel_id + 2))
 370                 return IRQ_NONE;
 371
 372         ch = dev->dev[channel_id];
 373         for (i = 0; i < VPIF_NUMOBJECTS; i++) {
 374                 common = &ch->common[i];
 375                 /* If streaming is started in this channel */
 376
 377                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 378                         spin_lock(&common->irqlock);
 379                         if (list_empty(&common->dma_queue)) {
 380                                 spin_unlock(&common->irqlock);
 381                                 continue;
 382                         }
 383                         spin_unlock(&common->irqlock);
 384
 385                         /* Progressive mode */
 386                         if (!channel_first_int[i][channel_id]) {
 387                                 /* Mark status of the cur_frm to
 388                                  * done and unlock semaphore on it */
 389                                 v4l2_get_timestamp(
 390                                         &common->cur_frm->vb.timestamp);
 391                                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 392                                                 VB2_BUF_STATE_DONE);
 393                                 /* Make cur_frm pointing to next_frm */
 394                                 common->cur_frm = common->next_frm;
 395                         }
 396
 397                         channel_first_int[i][channel_id] = 0;
 398                         process_progressive_mode(common);
 399                 } else {
 400                         /* Interlaced mode */
 401                         /* If it is first interrupt, ignore it */
 402
 403                         if (channel_first_int[i][channel_id]) {
 404                                 channel_first_int[i][channel_id] = 0;
 405                                 continue;
 406                         }
 407
 408                         if (0 == i) {
 409                                 ch->field_id ^= 1;
 410                                 /* Get field id from VPIF registers */
 411                                 fid = vpif_channel_getfid(ch->channel_id + 2);
 412                                 /* If fid does not match with stored field id */
 413                                 if (fid != ch->field_id) {
 414                                         /* Make them in sync */
 415                                         if (0 == fid)
 416                                                 ch->field_id = fid;
 417
 418                                         return IRQ_HANDLED;
 419                                 }
 420                         }
 421                         process_interlaced_mode(fid, common);
 422                 }
 423         }
 424
 425         return IRQ_HANDLED;
 426 }
 427
 428 static int vpif_update_std_info(struct channel_obj *ch)
 429 {
 430         struct video_obj *vid_ch = &ch->video;
 431         struct vpif_params *vpifparams = &ch->vpifparams;
 432         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 433         const struct vpif_channel_config_params *config;
 434
 435         int i;
 436
 437         for (i = 0; i < vpif_ch_params_count; i++) {
 438                 config = &vpif_ch_params[i];
 439                 if (config->hd_sd == 0) {
 440                         vpif_dbg(2, debug, "SD format\n");
 441                         if (config->stdid & vid_ch->stdid) {
 442                                 memcpy(std_info, config, sizeof(*config));
 443                                 break;
 444                         }
 445                 }
 446         }
 447
 448         if (i == vpif_ch_params_count) {
 449                 vpif_dbg(1, debug, "Format not found\n");
 450                 return -EINVAL;
 451         }
 452
 453         return 0;
 454 }
 455
 456 static int vpif_update_resolution(struct channel_obj *ch)
 457 {
 458         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 459         struct video_obj *vid_ch = &ch->video;
 460         struct vpif_params *vpifparams = &ch->vpifparams;
 461         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 462
 463         if (!vid_ch->stdid && !vid_ch->dv_timings.bt.height)
 464                 return -EINVAL;
 465
 466         if (vid_ch->stdid) {
 467                 if (vpif_update_std_info(ch))
 468                         return -EINVAL;
 469         }
 470
 471         common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 472         common->fmt.fmt.pix.width = std_info->width;
 473         common->fmt.fmt.pix.height = std_info->height;
 474         vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
 475                         common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
 476
 477         /* Set height and width paramateres */
 478         common->height = std_info->height;
 479         common->width = std_info->width;
 480         common->fmt.fmt.pix.sizeimage = common->height * common->width * 2;
 481
 482         if (vid_ch->stdid)
 483                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 484         else
 485                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
 486
 487         if (ch->vpifparams.std_info.frm_fmt)
 488                 common->fmt.fmt.pix.field = V4L2_FIELD_NONE;
 489         else
 490                 common->fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
 491
 492         return 0;
 493 }
 494
 495 /*
 496  * vpif_calculate_offsets: This function calculates buffers offset for Y and C
 497  * in the top and bottom field
 498  */
 499 static void vpif_calculate_offsets(struct channel_obj *ch)
 500 {
 501         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 502         struct vpif_params *vpifparams = &ch->vpifparams;
 503         enum v4l2_field field = common->fmt.fmt.pix.field;
 504         struct video_obj *vid_ch = &ch->video;
 505         unsigned int hpitch, sizeimage;
 506
 507         if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
 508                 if (ch->vpifparams.std_info.frm_fmt)
 509                         vid_ch->buf_field = V4L2_FIELD_NONE;
 510                 else
 511                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 512         } else {
 513                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 514         }
 515
 516         sizeimage = common->fmt.fmt.pix.sizeimage;
 517
 518         hpitch = common->fmt.fmt.pix.bytesperline;
 519         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 520             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 521                 common->ytop_off = 0;
 522                 common->ybtm_off = hpitch;
 523                 common->ctop_off = sizeimage / 2;
 524                 common->cbtm_off = sizeimage / 2 + hpitch;
 525         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 526                 common->ytop_off = 0;
 527                 common->ybtm_off = sizeimage / 4;
 528                 common->ctop_off = sizeimage / 2;
 529                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 530         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 531                 common->ybtm_off = 0;
 532                 common->ytop_off = sizeimage / 4;
 533                 common->cbtm_off = sizeimage / 2;
 534                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 535         }
 536
 537         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 538             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 539                 vpifparams->video_params.storage_mode = 1;
 540         } else {
 541                 vpifparams->video_params.storage_mode = 0;
 542         }
 543
 544         if (ch->vpifparams.std_info.frm_fmt == 1) {
 545                 vpifparams->video_params.hpitch =
 546                     common->fmt.fmt.pix.bytesperline;
 547         } else {
 548                 if ((field == V4L2_FIELD_ANY) ||
 549                         (field == V4L2_FIELD_INTERLACED))
 550                         vpifparams->video_params.hpitch =
 551                             common->fmt.fmt.pix.bytesperline * 2;
 552                 else
 553                         vpifparams->video_params.hpitch =
 554                             common->fmt.fmt.pix.bytesperline;
 555         }
 556
 557         ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
 558 }
 559
 560 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 561 {
 562         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 563
 564         if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
 565                 common->set_addr = ch3_set_videobuf_addr;
 566         } else {
 567                 if (2 == muxmode)
 568                         common->set_addr = ch2_set_videobuf_addr_yc_nmux;
 569                 else
 570                         common->set_addr = ch2_set_videobuf_addr;
 571         }
 572 }
 573
 574 /* functions implementing ioctls */
 575 /**
 576  * vpif_querycap() - QUERYCAP handler
 577  * @file: file ptr
 578  * @priv: file handle
 579  * @cap: ptr to v4l2_capability structure
 580  */
 581 static int vpif_querycap(struct file *file, void  *priv,
 582                                 struct v4l2_capability *cap)
 583 {
 584         struct vpif_display_config *config = vpif_dev->platform_data;
 585
 586         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 587         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 588         strlcpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
 589         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 590                  dev_name(vpif_dev));
 591         strlcpy(cap->card, config->card_name, sizeof(cap->card));
 592
 593         return 0;
 594 }
 595
 596 static int vpif_enum_fmt_vid_out(struct file *file, void  *priv,
 597                                         struct v4l2_fmtdesc *fmt)
 598 {
 599         if (fmt->index != 0)
 600                 return -EINVAL;
 601
 602         /* Fill in the information about format */
 603         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 604         strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
 605         fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 606         fmt->flags = 0;
 607         return 0;
 608 }
 609
 610 static int vpif_g_fmt_vid_out(struct file *file, void *priv,
 611                                 struct v4l2_format *fmt)
 612 {
 613         struct video_device *vdev = video_devdata(file);
 614         struct channel_obj *ch = video_get_drvdata(vdev);
 615         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 616
 617         /* Check the validity of the buffer type */
 618         if (common->fmt.type != fmt->type)
 619                 return -EINVAL;
 620
 621         if (vpif_update_resolution(ch))
 622                 return -EINVAL;
 623         *fmt = common->fmt;
 624         return 0;
 625 }
 626
 627 static int vpif_try_fmt_vid_out(struct file *file, void *priv,
 628                                 struct v4l2_format *fmt)
 629 {
 630         struct video_device *vdev = video_devdata(file);
 631         struct channel_obj *ch = video_get_drvdata(vdev);
 632         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 633         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 634
 635         /*
 636          * to supress v4l-compliance warnings silently correct
 637          * the pixelformat
 638          */
 639         if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
 640                 pixfmt->pixelformat = common->fmt.fmt.pix.pixelformat;
 641
 642         if (vpif_update_resolution(ch))
 643                 return -EINVAL;
 644
 645         pixfmt->colorspace = common->fmt.fmt.pix.colorspace;
 646         pixfmt->field = common->fmt.fmt.pix.field;
 647         pixfmt->bytesperline = common->fmt.fmt.pix.width;
 648         pixfmt->width = common->fmt.fmt.pix.width;
 649         pixfmt->height = common->fmt.fmt.pix.height;
 650         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height * 2;
 651
 652         return 0;
 653 }
 654
 655 static int vpif_s_fmt_vid_out(struct file *file, void *priv,
 656                                 struct v4l2_format *fmt)
 657 {
 658         struct video_device *vdev = video_devdata(file);
 659         struct channel_obj *ch = video_get_drvdata(vdev);
 660         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 661         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 662         int ret;
 663
 664         if (vb2_is_busy(&common->buffer_queue))
 665                 return -EBUSY;
 666
 667         ret = vpif_try_fmt_vid_out(file, priv, fmt);
 668         if (ret)
 669                 return ret;
 670
 671         /* store the pix format in the channel object */
 672         common->fmt.fmt.pix = *pixfmt;
 673
 674         /* store the format in the channel object */
 675         common->fmt = *fmt;
 676         return 0;
 677 }
 678
 679 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
 680 {
 681         struct vpif_display_config *config = vpif_dev->platform_data;
 682         struct video_device *vdev = video_devdata(file);
 683         struct channel_obj *ch = video_get_drvdata(vdev);
 684         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 685         struct vpif_display_chan_config *chan_cfg;
 686         struct v4l2_output output;
 687         int ret;
 688
 689         if (config->chan_config[ch->channel_id].outputs == NULL)
 690                 return -ENODATA;
 691
 692         chan_cfg = &config->chan_config[ch->channel_id];
 693         output = chan_cfg->outputs[ch->output_idx].output;
 694         if (output.capabilities != V4L2_OUT_CAP_STD)
 695                 return -ENODATA;
 696
 697         if (vb2_is_busy(&common->buffer_queue))
 698                 return -EBUSY;
 699
 700
 701         if (!(std_id & VPIF_V4L2_STD))
 702                 return -EINVAL;
 703
 704         /* Call encoder subdevice function to set the standard */
 705         ch->video.stdid = std_id;
 706         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
 707         /* Get the information about the standard */
 708         if (vpif_update_resolution(ch))
 709                 return -EINVAL;
 710
 711         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
 712
 713         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
 714                                                 s_std_output, std_id);
 715         if (ret < 0) {
 716                 vpif_err("Failed to set output standard\n");
 717                 return ret;
 718         }
 719
 720         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
 721                                                         s_std, std_id);
 722         if (ret < 0)
 723                 vpif_err("Failed to set standard for sub devices\n");
 724         return ret;
 725 }
 726
 727 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
 728 {
 729         struct vpif_display_config *config = vpif_dev->platform_data;
 730         struct video_device *vdev = video_devdata(file);
 731         struct channel_obj *ch = video_get_drvdata(vdev);
 732         struct vpif_display_chan_config *chan_cfg;
 733         struct v4l2_output output;
 734
 735         if (config->chan_config[ch->channel_id].outputs == NULL)
 736                 return -ENODATA;
 737
 738         chan_cfg = &config->chan_config[ch->channel_id];
 739         output = chan_cfg->outputs[ch->output_idx].output;
 740         if (output.capabilities != V4L2_OUT_CAP_STD)
 741                 return -ENODATA;
 742
 743         *std = ch->video.stdid;
 744         return 0;
 745 }
 746
 747 static int vpif_enum_output(struct file *file, void *fh,
 748                                 struct v4l2_output *output)
 749 {
 750
 751         struct vpif_display_config *config = vpif_dev->platform_data;
 752         struct video_device *vdev = video_devdata(file);
 753         struct channel_obj *ch = video_get_drvdata(vdev);
 754         struct vpif_display_chan_config *chan_cfg;
 755
 756         chan_cfg = &config->chan_config[ch->channel_id];
 757         if (output->index >= chan_cfg->output_count) {
 758                 vpif_dbg(1, debug, "Invalid output index\n");
 759                 return -EINVAL;
 760         }
 761
 762         *output = chan_cfg->outputs[output->index].output;
 763         return 0;
 764 }
 765
 766 /**
 767  * vpif_output_to_subdev() - Maps output to sub device
 768  * @vpif_cfg - global config ptr
 769  * @chan_cfg - channel config ptr
 770  * @index - Given output index from application
 771  *
 772  * lookup the sub device information for a given output index.
 773  * we report all the output to application. output table also
 774  * has sub device name for the each output
 775  */
 776 static int
 777 vpif_output_to_subdev(struct vpif_display_config *vpif_cfg,
 778                       struct vpif_display_chan_config *chan_cfg, int index)
 779 {
 780         struct vpif_subdev_info *subdev_info;
 781         const char *subdev_name;
 782         int i;
 783
 784         vpif_dbg(2, debug, "vpif_output_to_subdev\n");
 785
 786         if (chan_cfg->outputs == NULL)
 787                 return -1;
 788
 789         subdev_name = chan_cfg->outputs[index].subdev_name;
 790         if (subdev_name == NULL)
 791                 return -1;
 792
 793         /* loop through the sub device list to get the sub device info */
 794         for (i = 0; i < vpif_cfg->subdev_count; i++) {
 795                 subdev_info = &vpif_cfg->subdevinfo[i];
 796                 if (!strcmp(subdev_info->name, subdev_name))
 797                         return i;
 798         }
 799         return -1;
 800 }
 801
 802 /**
 803  * vpif_set_output() - Select an output
 804  * @vpif_cfg - global config ptr
 805  * @ch - channel
 806  * @index - Given output index from application
 807  *
 808  * Select the given output.
 809  */
 810 static int vpif_set_output(struct vpif_display_config *vpif_cfg,
 811                       struct channel_obj *ch, int index)
 812 {
 813         struct vpif_display_chan_config *chan_cfg =
 814                 &vpif_cfg->chan_config[ch->channel_id];
 815         struct v4l2_subdev *sd = NULL;
 816         u32 input = 0, output = 0;
 817         int sd_index;
 818         int ret;
 819
 820         sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
 821         if (sd_index >= 0)
 822                 sd = vpif_obj.sd[sd_index];
 823
 824         if (sd) {
 825                 input = chan_cfg->outputs[index].input_route;
 826                 output = chan_cfg->outputs[index].output_route;
 827                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
 828                 if (ret < 0 && ret != -ENOIOCTLCMD) {
 829                         vpif_err("Failed to set output\n");
 830                         return ret;
 831                 }
 832
 833         }
 834         ch->output_idx = index;
 835         ch->sd = sd;
 836         if (chan_cfg->outputs != NULL)
 837                 /* update tvnorms from the sub device output info */
 838                 ch->video_dev.tvnorms = chan_cfg->outputs[index].output.std;
 839         return 0;
 840 }
 841
 842 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
 843 {
 844         struct vpif_display_config *config = vpif_dev->platform_data;
 845         struct video_device *vdev = video_devdata(file);
 846         struct channel_obj *ch = video_get_drvdata(vdev);
 847         struct vpif_display_chan_config *chan_cfg;
 848         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 849
 850         if (vb2_is_busy(&common->buffer_queue))
 851                 return -EBUSY;
 852
 853         chan_cfg = &config->chan_config[ch->channel_id];
 854
 855         if (i >= chan_cfg->output_count)
 856                 return -EINVAL;
 857
 858         return vpif_set_output(config, ch, i);
 859 }
 860
 861 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
 862 {
 863         struct video_device *vdev = video_devdata(file);
 864         struct channel_obj *ch = video_get_drvdata(vdev);
 865
 866         *i = ch->output_idx;
 867
 868         return 0;
 869 }
 870
 871 /**
 872  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
 873  * @file: file ptr
 874  * @priv: file handle
 875  * @timings: input timings
 876  */
 877 static int
 878 vpif_enum_dv_timings(struct file *file, void *priv,
 879                      struct v4l2_enum_dv_timings *timings)
 880 {
 881         struct vpif_display_config *config = vpif_dev->platform_data;
 882         struct video_device *vdev = video_devdata(file);
 883         struct channel_obj *ch = video_get_drvdata(vdev);
 884         struct vpif_display_chan_config *chan_cfg;
 885         struct v4l2_output output;
 886         int ret;
 887
 888         if (config->chan_config[ch->channel_id].outputs == NULL)
 889                 return -ENODATA;
 890
 891         chan_cfg = &config->chan_config[ch->channel_id];
 892         output = chan_cfg->outputs[ch->output_idx].output;
 893         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
 894                 return -ENODATA;
 895
 896         timings->pad = 0;
 897
 898         ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
 899         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
 900                 return -EINVAL;
 901         return ret;
 902 }
 903
 904 /**
 905  * vpif_s_dv_timings() - S_DV_TIMINGS handler
 906  * @file: file ptr
 907  * @priv: file handle
 908  * @timings: digital video timings
 909  */
 910 static int vpif_s_dv_timings(struct file *file, void *priv,
 911                 struct v4l2_dv_timings *timings)
 912 {
 913         struct vpif_display_config *config = vpif_dev->platform_data;
 914         struct video_device *vdev = video_devdata(file);
 915         struct channel_obj *ch = video_get_drvdata(vdev);
 916         struct vpif_params *vpifparams = &ch->vpifparams;
 917         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 918         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 919         struct video_obj *vid_ch = &ch->video;
 920         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
 921         struct vpif_display_chan_config *chan_cfg;
 922         struct v4l2_output output;
 923         int ret;
 924
 925         if (config->chan_config[ch->channel_id].outputs == NULL)
 926                 return -ENODATA;
 927
 928         chan_cfg = &config->chan_config[ch->channel_id];
 929         output = chan_cfg->outputs[ch->output_idx].output;
 930         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
 931                 return -ENODATA;
 932
 933         if (vb2_is_busy(&common->buffer_queue))
 934                 return -EBUSY;
 935
 936         if (timings->type != V4L2_DV_BT_656_1120) {
 937                 vpif_dbg(2, debug, "Timing type not defined\n");
 938                 return -EINVAL;
 939         }
 940
 941         /* Configure subdevice timings, if any */
 942         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
 943         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
 944                 ret = 0;
 945         if (ret < 0) {
 946                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
 947                 return ret;
 948         }
 949
 950         if (!(timings->bt.width && timings->bt.height &&
 951                                 (timings->bt.hbackporch ||
 952                                  timings->bt.hfrontporch ||
 953                                  timings->bt.hsync) &&
 954                                 timings->bt.vfrontporch &&
 955                                 (timings->bt.vbackporch ||
 956                                  timings->bt.vsync))) {
 957                 vpif_dbg(2, debug, "Timings for width, height, "
 958                                 "horizontal back porch, horizontal sync, "
 959                                 "horizontal front porch, vertical back porch, "
 960                                 "vertical sync and vertical back porch "
 961                                 "must be defined\n");
 962                 return -EINVAL;
 963         }
 964
 965         vid_ch->dv_timings = *timings;
 966
 967         /* Configure video port timings */
 968
 969         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
 970         std_info->sav2eav = bt->width;
 971
 972         std_info->l1 = 1;
 973         std_info->l3 = bt->vsync + bt->vbackporch + 1;
 974
 975         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
 976         if (bt->interlaced) {
 977                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
 978                         std_info->l5 = std_info->vsize/2 -
 979                                 (bt->vfrontporch - 1);
 980                         std_info->l7 = std_info->vsize/2 + 1;
 981                         std_info->l9 = std_info->l7 + bt->il_vsync +
 982                                 bt->il_vbackporch + 1;
 983                         std_info->l11 = std_info->vsize -
 984                                 (bt->il_vfrontporch - 1);
 985                 } else {
 986                         vpif_dbg(2, debug, "Required timing values for "
 987                                         "interlaced BT format missing\n");
 988                         return -EINVAL;
 989                 }
 990         } else {
 991                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
 992         }
 993         strncpy(std_info->name, "Custom timings BT656/1120",
 994                         VPIF_MAX_NAME);
 995         std_info->width = bt->width;
 996         std_info->height = bt->height;
 997         std_info->frm_fmt = bt->interlaced ? 0 : 1;
 998         std_info->ycmux_mode = 0;
 999         std_info->capture_format = 0;
1000         std_info->vbi_supported = 0;
1001         std_info->hd_sd = 1;
1002         std_info->stdid = 0;
1003         vid_ch->stdid = 0;
1004
1005         return 0;
1006 }
1007
1008 /**
1009  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1010  * @file: file ptr
1011  * @priv: file handle
1012  * @timings: digital video timings
1013  */
1014 static int vpif_g_dv_timings(struct file *file, void *priv,
1015                 struct v4l2_dv_timings *timings)
1016 {
1017         struct vpif_display_config *config = vpif_dev->platform_data;
1018         struct video_device *vdev = video_devdata(file);
1019         struct channel_obj *ch = video_get_drvdata(vdev);
1020         struct vpif_display_chan_config *chan_cfg;
1021         struct video_obj *vid_ch = &ch->video;
1022         struct v4l2_output output;
1023
1024         if (config->chan_config[ch->channel_id].outputs == NULL)
1025                 goto error;
1026
1027         chan_cfg = &config->chan_config[ch->channel_id];
1028         output = chan_cfg->outputs[ch->output_idx].output;
1029
1030         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
1031                 goto error;
1032
1033         *timings = vid_ch->dv_timings;
1034
1035         return 0;
1036 error:
1037         return -ENODATA;
1038 }
1039
1040 /*
1041  * vpif_log_status() - Status information
1042  * @file: file ptr
1043  * @priv: file handle
1044  *
1045  * Returns zero.
1046  */
1047 static int vpif_log_status(struct file *filep, void *priv)
1048 {
1049         /* status for sub devices */
1050         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1051
1052         return 0;
1053 }
1054
1055 /* vpif display ioctl operations */
1056 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1057         .vidioc_querycap                = vpif_querycap,
1058         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1059         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1060         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1061         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1062
1063         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1064         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1065         .vidioc_querybuf                = vb2_ioctl_querybuf,
1066         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1067         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1068         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1069         .vidioc_streamon                = vb2_ioctl_streamon,
1070         .vidioc_streamoff               = vb2_ioctl_streamoff,
1071
1072         .vidioc_s_std                   = vpif_s_std,
1073         .vidioc_g_std                   = vpif_g_std,
1074
1075         .vidioc_enum_output             = vpif_enum_output,
1076         .vidioc_s_output                = vpif_s_output,
1077         .vidioc_g_output                = vpif_g_output,
1078
1079         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1080         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1081         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1082
1083         .vidioc_log_status              = vpif_log_status,
1084 };
1085
1086 static const struct v4l2_file_operations vpif_fops = {
1087         .owner          = THIS_MODULE,
1088         .open           = v4l2_fh_open,
1089         .release        = vb2_fop_release,
1090         .unlocked_ioctl = video_ioctl2,
1091         .mmap           = vb2_fop_mmap,
1092         .poll           = vb2_fop_poll
1093 };
1094
1095 /*Configure the channels, buffer sizei, request irq */
1096 static int initialize_vpif(void)
1097 {
1098         int free_channel_objects_index;
1099         int err, i, j;
1100
1101         /* Allocate memory for six channel objects */
1102         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1103                 vpif_obj.dev[i] =
1104                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1105                 /* If memory allocation fails, return error */
1106                 if (!vpif_obj.dev[i]) {
1107                         free_channel_objects_index = i;
1108                         err = -ENOMEM;
1109                         goto vpif_init_free_channel_objects;
1110                 }
1111         }
1112
1113         return 0;
1114
1115 vpif_init_free_channel_objects:
1116         for (j = 0; j < free_channel_objects_index; j++)
1117                 kfree(vpif_obj.dev[j]);
1118         return err;
1119 }
1120
1121 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1122                             struct v4l2_subdev *subdev,
1123                             struct v4l2_async_subdev *asd)
1124 {
1125         int i;
1126
1127         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1128                 if (!strcmp(vpif_obj.config->subdevinfo[i].name,
1129                             subdev->name)) {
1130                         vpif_obj.sd[i] = subdev;
1131                         vpif_obj.sd[i]->grp_id = 1 << i;
1132                         return 0;
1133                 }
1134
1135         return -EINVAL;
1136 }
1137
1138 static int vpif_probe_complete(void)
1139 {
1140         struct common_obj *common;
1141         struct video_device *vdev;
1142         struct channel_obj *ch;
1143         struct vb2_queue *q;
1144         int j, err, k;
1145
1146         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1147                 ch = vpif_obj.dev[j];
1148                 /* Initialize field of the channel objects */
1149                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1150                         common = &ch->common[k];
1151                         spin_lock_init(&common->irqlock);
1152                         mutex_init(&common->lock);
1153                         common->set_addr = NULL;
1154                         common->ytop_off = 0;
1155                         common->ybtm_off = 0;
1156                         common->ctop_off = 0;
1157                         common->cbtm_off = 0;
1158                         common->cur_frm = NULL;
1159                         common->next_frm = NULL;
1160                         memset(&common->fmt, 0, sizeof(common->fmt));
1161                 }
1162                 ch->initialized = 0;
1163                 if (vpif_obj.config->subdev_count)
1164                         ch->sd = vpif_obj.sd[0];
1165                 ch->channel_id = j;
1166
1167                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1168
1169                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1170                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1171
1172                 /* select output 0 */
1173                 err = vpif_set_output(vpif_obj.config, ch, 0);
1174                 if (err)
1175                         goto probe_out;
1176
1177                 /* set initial format */
1178                 ch->video.stdid = V4L2_STD_525_60;
1179                 memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1180                 vpif_update_resolution(ch);
1181
1182                 /* Initialize vb2 queue */
1183                 q = &common->buffer_queue;
1184                 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1185                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1186                 q->drv_priv = ch;
1187                 q->ops = &video_qops;
1188                 q->mem_ops = &vb2_dma_contig_memops;
1189                 q->buf_struct_size = sizeof(struct vpif_disp_buffer);
1190                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1191                 q->min_buffers_needed = 1;
1192                 q->lock = &common->lock;
1193                 err = vb2_queue_init(q);
1194                 if (err) {
1195                         vpif_err("vpif_display: vb2_queue_init() failed\n");
1196                         goto probe_out;
1197                 }
1198
1199                 common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1200                 if (IS_ERR(common->alloc_ctx)) {
1201                         vpif_err("Failed to get the context\n");
1202                         err = PTR_ERR(common->alloc_ctx);
1203                         goto probe_out;
1204                 }
1205
1206                 INIT_LIST_HEAD(&common->dma_queue);
1207
1208                 /* register video device */
1209                 vpif_dbg(1, debug, "channel=%p,channel->video_dev=%p\n",
1210                          ch, &ch->video_dev);
1211
1212                 /* Initialize the video_device structure */
1213                 vdev = &ch->video_dev;
1214                 strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
1215                 vdev->release = video_device_release_empty;
1216                 vdev->fops = &vpif_fops;
1217                 vdev->ioctl_ops = &vpif_ioctl_ops;
1218                 vdev->v4l2_dev = &vpif_obj.v4l2_dev;
1219                 vdev->vfl_dir = VFL_DIR_TX;
1220                 vdev->queue = q;
1221                 vdev->lock = &common->lock;
1222                 video_set_drvdata(&ch->video_dev, ch);
1223                 err = video_register_device(vdev, VFL_TYPE_GRABBER,
1224                                             (j ? 3 : 2));
1225                 if (err < 0)
1226                         goto probe_out;
1227         }
1228
1229         return 0;
1230
1231 probe_out:
1232         for (k = 0; k < j; k++) {
1233                 ch = vpif_obj.dev[k];
1234                 common = &ch->common[k];
1235                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1236                 video_unregister_device(&ch->video_dev);
1237         }
1238         return err;
1239 }
1240
1241 static int vpif_async_complete(struct v4l2_async_notifier *notifier)
1242 {
1243         return vpif_probe_complete();
1244 }
1245
1246 /*
1247  * vpif_probe: This function creates device entries by register itself to the
1248  * V4L2 driver and initializes fields of each channel objects
1249  */
1250 static __init int vpif_probe(struct platform_device *pdev)
1251 {
1252         struct vpif_subdev_info *subdevdata;
1253         struct i2c_adapter *i2c_adap;
1254         struct resource *res;
1255         int subdev_count;
1256         int res_idx = 0;
1257         int i, err;
1258
1259         vpif_dev = &pdev->dev;
1260         err = initialize_vpif();
1261
1262         if (err) {
1263                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1264                 return err;
1265         }
1266
1267         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1268         if (err) {
1269                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1270                 return err;
1271         }
1272
1273         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1274                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
1275                                         IRQF_SHARED, VPIF_DRIVER_NAME,
1276                                         (void *)(&vpif_obj.dev[res_idx]->
1277                                         channel_id));
1278                 if (err) {
1279                         err = -EINVAL;
1280                         vpif_err("VPIF IRQ request failed\n");
1281                         goto vpif_unregister;
1282                 }
1283                 res_idx++;
1284         }
1285
1286         vpif_obj.config = pdev->dev.platform_data;
1287         subdev_count = vpif_obj.config->subdev_count;
1288         subdevdata = vpif_obj.config->subdevinfo;
1289         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1290                                                                 GFP_KERNEL);
1291         if (vpif_obj.sd == NULL) {
1292                 vpif_err("unable to allocate memory for subdevice pointers\n");
1293                 err = -ENOMEM;
1294                 goto vpif_unregister;
1295         }
1296
1297         if (!vpif_obj.config->asd_sizes) {
1298                 i2c_adap = i2c_get_adapter(1);
1299                 for (i = 0; i < subdev_count; i++) {
1300                         vpif_obj.sd[i] =
1301                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1302                                                           i2c_adap,
1303                                                           &subdevdata[i].
1304                                                           board_info,
1305                                                           NULL);
1306                         if (!vpif_obj.sd[i]) {
1307                                 vpif_err("Error registering v4l2 subdevice\n");
1308                                 err = -ENODEV;
1309                                 goto probe_subdev_out;
1310                         }
1311
1312                         if (vpif_obj.sd[i])
1313                                 vpif_obj.sd[i]->grp_id = 1 << i;
1314                 }
1315                 vpif_probe_complete();
1316         } else {
1317                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
1318                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
1319                 vpif_obj.notifier.bound = vpif_async_bound;
1320                 vpif_obj.notifier.complete = vpif_async_complete;
1321                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
1322                                                    &vpif_obj.notifier);
1323                 if (err) {
1324                         vpif_err("Error registering async notifier\n");
1325                         err = -EINVAL;
1326                         goto probe_subdev_out;
1327                 }
1328         }
1329
1330         return 0;
1331
1332 probe_subdev_out:
1333         kfree(vpif_obj.sd);
1334 vpif_unregister:
1335         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1336
1337         return err;
1338 }
1339
1340 /*
1341  * vpif_remove: It un-register channels from V4L2 driver
1342  */
1343 static int vpif_remove(struct platform_device *device)
1344 {
1345         struct common_obj *common;
1346         struct channel_obj *ch;
1347         int i;
1348
1349         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1350
1351         kfree(vpif_obj.sd);
1352         /* un-register device */
1353         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1354                 /* Get the pointer to the channel object */
1355                 ch = vpif_obj.dev[i];
1356                 common = &ch->common[VPIF_VIDEO_INDEX];
1357                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1358                 /* Unregister video device */
1359                 video_unregister_device(&ch->video_dev);
1360                 kfree(vpif_obj.dev[i]);
1361         }
1362
1363         return 0;
1364 }
1365
1366 #ifdef CONFIG_PM_SLEEP
1367 static int vpif_suspend(struct device *dev)
1368 {
1369         struct common_obj *common;
1370         struct channel_obj *ch;
1371         int i;
1372
1373         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1374                 /* Get the pointer to the channel object */
1375                 ch = vpif_obj.dev[i];
1376                 common = &ch->common[VPIF_VIDEO_INDEX];
1377
1378                 if (!vb2_start_streaming_called(&common->buffer_queue))
1379                         continue;
1380
1381                 mutex_lock(&common->lock);
1382                 /* Disable channel */
1383                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1384                         enable_channel2(0);
1385                         channel2_intr_enable(0);
1386                 }
1387                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1388                         ycmux_mode == 2) {
1389                         enable_channel3(0);
1390                         channel3_intr_enable(0);
1391                 }
1392                 mutex_unlock(&common->lock);
1393         }
1394
1395         return 0;
1396 }
1397
1398 static int vpif_resume(struct device *dev)
1399 {
1400
1401         struct common_obj *common;
1402         struct channel_obj *ch;
1403         int i;
1404
1405         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1406                 /* Get the pointer to the channel object */
1407                 ch = vpif_obj.dev[i];
1408                 common = &ch->common[VPIF_VIDEO_INDEX];
1409
1410                 if (!vb2_start_streaming_called(&common->buffer_queue))
1411                         continue;
1412
1413                 mutex_lock(&common->lock);
1414                 /* Enable channel */
1415                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1416                         enable_channel2(1);
1417                         channel2_intr_enable(1);
1418                 }
1419                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1420                                 ycmux_mode == 2) {
1421                         enable_channel3(1);
1422                         channel3_intr_enable(1);
1423                 }
1424                 mutex_unlock(&common->lock);
1425         }
1426
1427         return 0;
1428 }
1429
1430 #endif
1431
1432 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
1433
1434 static __refdata struct platform_driver vpif_driver = {
1435         .driver = {
1436                         .name   = VPIF_DRIVER_NAME,
1437                         .pm     = &vpif_pm_ops,
1438         },
1439         .probe  = vpif_probe,
1440         .remove = vpif_remove,
1441 };
1442
1443 module_platform_driver(vpif_driver);