drivers/media/platform/ti/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 - https://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 MODULE_ALIAS("platform:" VPIF_DRIVER_NAME);
  46
  47 /* Is set to 1 in case of SDTV formats, 2 in case of HDTV formats. */
  48 static int ycmux_mode;
  49
  50 static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
  51
  52 static struct vpif_device vpif_obj = { {NULL} };
  53 static struct device *vpif_dev;
  54 static void vpif_calculate_offsets(struct channel_obj *ch);
  55 static void vpif_config_addr(struct channel_obj *ch, int muxmode);
  56
  57 static inline
  58 struct vpif_disp_buffer *to_vpif_buffer(struct vb2_v4l2_buffer *vb)
  59 {
  60         return container_of(vb, struct vpif_disp_buffer, vb);
  61 }
  62
  63 /**
  64  * vpif_buffer_prepare :  callback function for buffer prepare
  65  * @vb: ptr to vb2_buffer
  66  *
  67  * This is the callback function for buffer prepare when vb2_qbuf()
  68  * function is called. The buffer is prepared and user space virtual address
  69  * or user address is converted into  physical address
  70  */
  71 static int vpif_buffer_prepare(struct vb2_buffer *vb)
  72 {
  73         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
  74         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
  75         struct common_obj *common;
  76
  77         common = &ch->common[VPIF_VIDEO_INDEX];
  78
  79         vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
  80         if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
  81                 return -EINVAL;
  82
  83         vbuf->field = common->fmt.fmt.pix.field;
  84
  85         if (vb->vb2_queue->type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) {
  86                 unsigned long addr = vb2_dma_contig_plane_dma_addr(vb, 0);
  87
  88                 if (!ISALIGNED(addr + common->ytop_off) ||
  89                         !ISALIGNED(addr + common->ybtm_off) ||
  90                         !ISALIGNED(addr + common->ctop_off) ||
  91                         !ISALIGNED(addr + common->cbtm_off)) {
  92                         vpif_err("buffer offset not aligned to 8 bytes\n");
  93                         return -EINVAL;
  94                 }
  95         }
  96
  97         return 0;
  98 }
  99
 100 /**
 101  * vpif_buffer_queue_setup : Callback function for buffer setup.
 102  * @vq: vb2_queue ptr
 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_devs: 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                                 unsigned int *nbuffers, unsigned int *nplanes,
 113                                 unsigned int sizes[], struct device *alloc_devs[])
 114 {
 115         struct channel_obj *ch = vb2_get_drv_priv(vq);
 116         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 117         unsigned size = common->fmt.fmt.pix.sizeimage;
 118
 119         if (*nplanes) {
 120                 if (sizes[0] < size)
 121                         return -EINVAL;
 122                 size = sizes[0];
 123         }
 124
 125         if (vq->num_buffers + *nbuffers < 3)
 126                 *nbuffers = 3 - vq->num_buffers;
 127
 128         *nplanes = 1;
 129         sizes[0] = size;
 130
 131         /* Calculate the offset for Y and C data  in the buffer */
 132         vpif_calculate_offsets(ch);
 133
 134         return 0;
 135 }
 136
 137 /**
 138  * vpif_buffer_queue : Callback function to add buffer to DMA queue
 139  * @vb: ptr to vb2_buffer
 140  *
 141  * This callback function queues the buffer to DMA engine
 142  */
 143 static void vpif_buffer_queue(struct vb2_buffer *vb)
 144 {
 145         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 146         struct vpif_disp_buffer *buf = to_vpif_buffer(vbuf);
 147         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
 148         struct common_obj *common;
 149         unsigned long flags;
 150
 151         common = &ch->common[VPIF_VIDEO_INDEX];
 152
 153         /* add the buffer to the DMA queue */
 154         spin_lock_irqsave(&common->irqlock, flags);
 155         list_add_tail(&buf->list, &common->dma_queue);
 156         spin_unlock_irqrestore(&common->irqlock, flags);
 157 }
 158
 159 /**
 160  * vpif_start_streaming : Starts the DMA engine for streaming
 161  * @vq: ptr to vb2_buffer
 162  * @count: number of buffers
 163  */
 164 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 165 {
 166         struct vpif_display_config *vpif_config_data =
 167                                         vpif_dev->platform_data;
 168         struct channel_obj *ch = vb2_get_drv_priv(vq);
 169         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 170         struct vpif_params *vpif = &ch->vpifparams;
 171         struct vpif_disp_buffer *buf, *tmp;
 172         unsigned long addr, flags;
 173         int ret;
 174
 175         spin_lock_irqsave(&common->irqlock, flags);
 176
 177         /* Initialize field_id */
 178         ch->field_id = 0;
 179
 180         /* clock settings */
 181         if (vpif_config_data->set_clock) {
 182                 ret = vpif_config_data->set_clock(ch->vpifparams.std_info.
 183                 ycmux_mode, ch->vpifparams.std_info.hd_sd);
 184                 if (ret < 0) {
 185                         vpif_err("can't set clock\n");
 186                         goto err;
 187                 }
 188         }
 189
 190         /* set the parameters and addresses */
 191         ret = vpif_set_video_params(vpif, ch->channel_id + 2);
 192         if (ret < 0)
 193                 goto err;
 194
 195         ycmux_mode = ret;
 196         vpif_config_addr(ch, ret);
 197         /* Get the next frame from the buffer queue */
 198         common->next_frm = common->cur_frm =
 199                             list_entry(common->dma_queue.next,
 200                                        struct vpif_disp_buffer, list);
 201
 202         list_del(&common->cur_frm->list);
 203         spin_unlock_irqrestore(&common->irqlock, flags);
 204
 205         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb.vb2_buf, 0);
 206         common->set_addr((addr + common->ytop_off),
 207                             (addr + common->ybtm_off),
 208                             (addr + common->ctop_off),
 209                             (addr + common->cbtm_off));
 210
 211         /*
 212          * Set interrupt for both the fields in VPIF
 213          * Register enable channel in VPIF register
 214          */
 215         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
 216         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 217                 channel2_intr_assert();
 218                 channel2_intr_enable(1);
 219                 enable_channel2(1);
 220                 if (vpif_config_data->chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
 221                         channel2_clipping_enable(1);
 222         }
 223
 224         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
 225                 channel3_intr_assert();
 226                 channel3_intr_enable(1);
 227                 enable_channel3(1);
 228                 if (vpif_config_data->chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
 229                         channel3_clipping_enable(1);
 230         }
 231
 232         return 0;
 233
 234 err:
 235         list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
 236                 list_del(&buf->list);
 237                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
 238         }
 239         spin_unlock_irqrestore(&common->irqlock, flags);
 240
 241         return ret;
 242 }
 243
 244 /**
 245  * vpif_stop_streaming : Stop the DMA engine
 246  * @vq: ptr to vb2_queue
 247  *
 248  * This callback stops the DMA engine and any remaining buffers
 249  * in the DMA queue are released.
 250  */
 251 static void vpif_stop_streaming(struct vb2_queue *vq)
 252 {
 253         struct channel_obj *ch = vb2_get_drv_priv(vq);
 254         struct common_obj *common;
 255         unsigned long flags;
 256
 257         common = &ch->common[VPIF_VIDEO_INDEX];
 258
 259         /* Disable channel */
 260         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 261                 enable_channel2(0);
 262                 channel2_intr_enable(0);
 263         }
 264         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
 265                 enable_channel3(0);
 266                 channel3_intr_enable(0);
 267         }
 268
 269         /* release all active buffers */
 270         spin_lock_irqsave(&common->irqlock, flags);
 271         if (common->cur_frm == common->next_frm) {
 272                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 273                                 VB2_BUF_STATE_ERROR);
 274         } else {
 275                 if (common->cur_frm)
 276                         vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 277                                         VB2_BUF_STATE_ERROR);
 278                 if (common->next_frm)
 279                         vb2_buffer_done(&common->next_frm->vb.vb2_buf,
 280                                         VB2_BUF_STATE_ERROR);
 281         }
 282
 283         while (!list_empty(&common->dma_queue)) {
 284                 common->next_frm = list_entry(common->dma_queue.next,
 285                                                 struct vpif_disp_buffer, list);
 286                 list_del(&common->next_frm->list);
 287                 vb2_buffer_done(&common->next_frm->vb.vb2_buf,
 288                                 VB2_BUF_STATE_ERROR);
 289         }
 290         spin_unlock_irqrestore(&common->irqlock, flags);
 291 }
 292
 293 static const struct vb2_ops video_qops = {
 294         .queue_setup            = vpif_buffer_queue_setup,
 295         .wait_prepare           = vb2_ops_wait_prepare,
 296         .wait_finish            = vb2_ops_wait_finish,
 297         .buf_prepare            = vpif_buffer_prepare,
 298         .start_streaming        = vpif_start_streaming,
 299         .stop_streaming         = vpif_stop_streaming,
 300         .buf_queue              = vpif_buffer_queue,
 301 };
 302
 303 static void process_progressive_mode(struct common_obj *common)
 304 {
 305         unsigned long addr;
 306
 307         spin_lock(&common->irqlock);
 308         /* Get the next buffer from buffer queue */
 309         common->next_frm = list_entry(common->dma_queue.next,
 310                                 struct vpif_disp_buffer, list);
 311         /* Remove that buffer from the buffer queue */
 312         list_del(&common->next_frm->list);
 313         spin_unlock(&common->irqlock);
 314
 315         /* Set top and bottom field addrs in VPIF registers */
 316         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb.vb2_buf, 0);
 317         common->set_addr(addr + common->ytop_off,
 318                                  addr + common->ybtm_off,
 319                                  addr + common->ctop_off,
 320                                  addr + common->cbtm_off);
 321 }
 322
 323 static void process_interlaced_mode(int fid, struct common_obj *common)
 324 {
 325         /* device field id and local field id are in sync */
 326         /* If this is even field */
 327         if (0 == fid) {
 328                 if (common->cur_frm == common->next_frm)
 329                         return;
 330
 331                 /* one frame is displayed If next frame is
 332                  *  available, release cur_frm and move on */
 333                 /* Copy frame display time */
 334                 common->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
 335                 /* Change status of the cur_frm */
 336                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 337                                         VB2_BUF_STATE_DONE);
 338                 /* Make cur_frm pointing to next_frm */
 339                 common->cur_frm = common->next_frm;
 340
 341         } else if (1 == fid) {  /* odd field */
 342                 spin_lock(&common->irqlock);
 343                 if (list_empty(&common->dma_queue)
 344                     || (common->cur_frm != common->next_frm)) {
 345                         spin_unlock(&common->irqlock);
 346                         return;
 347                 }
 348                 spin_unlock(&common->irqlock);
 349                 /* one field is displayed configure the next
 350                  * frame if it is available else hold on current
 351                  * frame */
 352                 /* Get next from the buffer queue */
 353                 process_progressive_mode(common);
 354         }
 355 }
 356
 357 /*
 358  * vpif_channel_isr: It changes status of the displayed buffer, takes next
 359  * buffer from the queue and sets its address in VPIF registers
 360  */
 361 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 362 {
 363         struct vpif_device *dev = &vpif_obj;
 364         struct channel_obj *ch;
 365         struct common_obj *common;
 366         int fid = -1, i;
 367         int channel_id;
 368
 369         channel_id = *(int *)(dev_id);
 370         if (!vpif_intr_status(channel_id + 2))
 371                 return IRQ_NONE;
 372
 373         ch = dev->dev[channel_id];
 374         for (i = 0; i < VPIF_NUMOBJECTS; i++) {
 375                 common = &ch->common[i];
 376                 /* If streaming is started in this channel */
 377
 378                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 379                         spin_lock(&common->irqlock);
 380                         if (list_empty(&common->dma_queue)) {
 381                                 spin_unlock(&common->irqlock);
 382                                 continue;
 383                         }
 384                         spin_unlock(&common->irqlock);
 385
 386                         /* Progressive mode */
 387                         if (!channel_first_int[i][channel_id]) {
 388                                 /* Mark status of the cur_frm to
 389                                  * done and unlock semaphore on it */
 390                                 common->cur_frm->vb.vb2_buf.timestamp =
 391                                                 ktime_get_ns();
 392                                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
 393                                                 VB2_BUF_STATE_DONE);
 394                                 /* Make cur_frm pointing to next_frm */
 395                                 common->cur_frm = common->next_frm;
 396                         }
 397
 398                         channel_first_int[i][channel_id] = 0;
 399                         process_progressive_mode(common);
 400                 } else {
 401                         /* Interlaced mode */
 402                         /* If it is first interrupt, ignore it */
 403
 404                         if (channel_first_int[i][channel_id]) {
 405                                 channel_first_int[i][channel_id] = 0;
 406                                 continue;
 407                         }
 408
 409                         if (0 == i) {
 410                                 ch->field_id ^= 1;
 411                                 /* Get field id from VPIF registers */
 412                                 fid = vpif_channel_getfid(ch->channel_id + 2);
 413                                 /* If fid does not match with stored field id */
 414                                 if (fid != ch->field_id) {
 415                                         /* Make them in sync */
 416                                         if (0 == fid)
 417                                                 ch->field_id = fid;
 418
 419                                         return IRQ_HANDLED;
 420                                 }
 421                         }
 422                         process_interlaced_mode(fid, common);
 423                 }
 424         }
 425
 426         return IRQ_HANDLED;
 427 }
 428
 429 static int vpif_update_std_info(struct channel_obj *ch)
 430 {
 431         struct video_obj *vid_ch = &ch->video;
 432         struct vpif_params *vpifparams = &ch->vpifparams;
 433         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 434         const struct vpif_channel_config_params *config;
 435
 436         int i;
 437
 438         for (i = 0; i < vpif_ch_params_count; i++) {
 439                 config = &vpif_ch_params[i];
 440                 if (config->hd_sd == 0) {
 441                         vpif_dbg(2, debug, "SD format\n");
 442                         if (config->stdid & vid_ch->stdid) {
 443                                 memcpy(std_info, config, sizeof(*config));
 444                                 break;
 445                         }
 446                 }
 447         }
 448
 449         if (i == vpif_ch_params_count) {
 450                 vpif_dbg(1, debug, "Format not found\n");
 451                 return -EINVAL;
 452         }
 453
 454         return 0;
 455 }
 456
 457 static int vpif_update_resolution(struct channel_obj *ch)
 458 {
 459         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 460         struct video_obj *vid_ch = &ch->video;
 461         struct vpif_params *vpifparams = &ch->vpifparams;
 462         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 463
 464         if (!vid_ch->stdid && !vid_ch->dv_timings.bt.height)
 465                 return -EINVAL;
 466
 467         if (vid_ch->stdid) {
 468                 if (vpif_update_std_info(ch))
 469                         return -EINVAL;
 470         }
 471
 472         common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 473         common->fmt.fmt.pix.width = std_info->width;
 474         common->fmt.fmt.pix.height = std_info->height;
 475         vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
 476                         common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
 477
 478         /* Set height and width paramateres */
 479         common->height = std_info->height;
 480         common->width = std_info->width;
 481         common->fmt.fmt.pix.sizeimage = common->height * common->width * 2;
 482
 483         if (vid_ch->stdid)
 484                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 485         else
 486                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
 487
 488         if (ch->vpifparams.std_info.frm_fmt)
 489                 common->fmt.fmt.pix.field = V4L2_FIELD_NONE;
 490         else
 491                 common->fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
 492
 493         return 0;
 494 }
 495
 496 /*
 497  * vpif_calculate_offsets: This function calculates buffers offset for Y and C
 498  * in the top and bottom field
 499  */
 500 static void vpif_calculate_offsets(struct channel_obj *ch)
 501 {
 502         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 503         struct vpif_params *vpifparams = &ch->vpifparams;
 504         enum v4l2_field field = common->fmt.fmt.pix.field;
 505         struct video_obj *vid_ch = &ch->video;
 506         unsigned int hpitch, sizeimage;
 507
 508         if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
 509                 if (ch->vpifparams.std_info.frm_fmt)
 510                         vid_ch->buf_field = V4L2_FIELD_NONE;
 511                 else
 512                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 513         } else {
 514                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 515         }
 516
 517         sizeimage = common->fmt.fmt.pix.sizeimage;
 518
 519         hpitch = common->fmt.fmt.pix.bytesperline;
 520         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 521             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 522                 common->ytop_off = 0;
 523                 common->ybtm_off = hpitch;
 524                 common->ctop_off = sizeimage / 2;
 525                 common->cbtm_off = sizeimage / 2 + hpitch;
 526         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 527                 common->ytop_off = 0;
 528                 common->ybtm_off = sizeimage / 4;
 529                 common->ctop_off = sizeimage / 2;
 530                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 531         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 532                 common->ybtm_off = 0;
 533                 common->ytop_off = sizeimage / 4;
 534                 common->cbtm_off = sizeimage / 2;
 535                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 536         }
 537
 538         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 539             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 540                 vpifparams->video_params.storage_mode = 1;
 541         } else {
 542                 vpifparams->video_params.storage_mode = 0;
 543         }
 544
 545         if (ch->vpifparams.std_info.frm_fmt == 1) {
 546                 vpifparams->video_params.hpitch =
 547                     common->fmt.fmt.pix.bytesperline;
 548         } else {
 549                 if ((field == V4L2_FIELD_ANY) ||
 550                         (field == V4L2_FIELD_INTERLACED))
 551                         vpifparams->video_params.hpitch =
 552                             common->fmt.fmt.pix.bytesperline * 2;
 553                 else
 554                         vpifparams->video_params.hpitch =
 555                             common->fmt.fmt.pix.bytesperline;
 556         }
 557
 558         ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
 559 }
 560
 561 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 562 {
 563         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 564
 565         if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
 566                 common->set_addr = ch3_set_videobuf_addr;
 567         } else {
 568                 if (2 == muxmode)
 569                         common->set_addr = ch2_set_videobuf_addr_yc_nmux;
 570                 else
 571                         common->set_addr = ch2_set_videobuf_addr;
 572         }
 573 }
 574
 575 /* functions implementing ioctls */
 576 /**
 577  * vpif_querycap() - QUERYCAP handler
 578  * @file: file ptr
 579  * @priv: file handle
 580  * @cap: ptr to v4l2_capability structure
 581  */
 582 static int vpif_querycap(struct file *file, void  *priv,
 583                                 struct v4l2_capability *cap)
 584 {
 585         struct vpif_display_config *config = vpif_dev->platform_data;
 586
 587         strscpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
 588         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 589                  dev_name(vpif_dev));
 590         strscpy(cap->card, config->card_name, sizeof(cap->card));
 591
 592         return 0;
 593 }
 594
 595 static int vpif_enum_fmt_vid_out(struct file *file, void  *priv,
 596                                         struct v4l2_fmtdesc *fmt)
 597 {
 598         if (fmt->index != 0)
 599                 return -EINVAL;
 600
 601         /* Fill in the information about format */
 602         fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 603         return 0;
 604 }
 605
 606 static int vpif_g_fmt_vid_out(struct file *file, void *priv,
 607                                 struct v4l2_format *fmt)
 608 {
 609         struct video_device *vdev = video_devdata(file);
 610         struct channel_obj *ch = video_get_drvdata(vdev);
 611         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 612
 613         /* Check the validity of the buffer type */
 614         if (common->fmt.type != fmt->type)
 615                 return -EINVAL;
 616
 617         if (vpif_update_resolution(ch))
 618                 return -EINVAL;
 619         *fmt = common->fmt;
 620         return 0;
 621 }
 622
 623 static int vpif_try_fmt_vid_out(struct file *file, void *priv,
 624                                 struct v4l2_format *fmt)
 625 {
 626         struct video_device *vdev = video_devdata(file);
 627         struct channel_obj *ch = video_get_drvdata(vdev);
 628         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 629         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 630
 631         /*
 632          * to suppress v4l-compliance warnings silently correct
 633          * the pixelformat
 634          */
 635         if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
 636                 pixfmt->pixelformat = common->fmt.fmt.pix.pixelformat;
 637
 638         if (vpif_update_resolution(ch))
 639                 return -EINVAL;
 640
 641         pixfmt->colorspace = common->fmt.fmt.pix.colorspace;
 642         pixfmt->field = common->fmt.fmt.pix.field;
 643         pixfmt->bytesperline = common->fmt.fmt.pix.width;
 644         pixfmt->width = common->fmt.fmt.pix.width;
 645         pixfmt->height = common->fmt.fmt.pix.height;
 646         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height * 2;
 647
 648         return 0;
 649 }
 650
 651 static int vpif_s_fmt_vid_out(struct file *file, void *priv,
 652                                 struct v4l2_format *fmt)
 653 {
 654         struct video_device *vdev = video_devdata(file);
 655         struct channel_obj *ch = video_get_drvdata(vdev);
 656         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 657         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 658         int ret;
 659
 660         if (vb2_is_busy(&common->buffer_queue))
 661                 return -EBUSY;
 662
 663         ret = vpif_try_fmt_vid_out(file, priv, fmt);
 664         if (ret)
 665                 return ret;
 666
 667         /* store the pix format in the channel object */
 668         common->fmt.fmt.pix = *pixfmt;
 669
 670         /* store the format in the channel object */
 671         common->fmt = *fmt;
 672         return 0;
 673 }
 674
 675 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
 676 {
 677         struct vpif_display_config *config = vpif_dev->platform_data;
 678         struct video_device *vdev = video_devdata(file);
 679         struct channel_obj *ch = video_get_drvdata(vdev);
 680         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 681         struct vpif_display_chan_config *chan_cfg;
 682         struct v4l2_output output;
 683         int ret;
 684
 685         if (!config->chan_config[ch->channel_id].outputs)
 686                 return -ENODATA;
 687
 688         chan_cfg = &config->chan_config[ch->channel_id];
 689         output = chan_cfg->outputs[ch->output_idx].output;
 690         if (output.capabilities != V4L2_OUT_CAP_STD)
 691                 return -ENODATA;
 692
 693         if (vb2_is_busy(&common->buffer_queue))
 694                 return -EBUSY;
 695
 696
 697         if (!(std_id & VPIF_V4L2_STD))
 698                 return -EINVAL;
 699
 700         /* Call encoder subdevice function to set the standard */
 701         ch->video.stdid = std_id;
 702         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
 703         /* Get the information about the standard */
 704         if (vpif_update_resolution(ch))
 705                 return -EINVAL;
 706
 707         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
 708
 709         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
 710                                                 s_std_output, std_id);
 711         if (ret < 0) {
 712                 vpif_err("Failed to set output standard\n");
 713                 return ret;
 714         }
 715
 716         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
 717                                                         s_std, std_id);
 718         if (ret < 0)
 719                 vpif_err("Failed to set standard for sub devices\n");
 720         return ret;
 721 }
 722
 723 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
 724 {
 725         struct vpif_display_config *config = vpif_dev->platform_data;
 726         struct video_device *vdev = video_devdata(file);
 727         struct channel_obj *ch = video_get_drvdata(vdev);
 728         struct vpif_display_chan_config *chan_cfg;
 729         struct v4l2_output output;
 730
 731         if (!config->chan_config[ch->channel_id].outputs)
 732                 return -ENODATA;
 733
 734         chan_cfg = &config->chan_config[ch->channel_id];
 735         output = chan_cfg->outputs[ch->output_idx].output;
 736         if (output.capabilities != V4L2_OUT_CAP_STD)
 737                 return -ENODATA;
 738
 739         *std = ch->video.stdid;
 740         return 0;
 741 }
 742
 743 static int vpif_enum_output(struct file *file, void *fh,
 744                                 struct v4l2_output *output)
 745 {
 746
 747         struct vpif_display_config *config = vpif_dev->platform_data;
 748         struct video_device *vdev = video_devdata(file);
 749         struct channel_obj *ch = video_get_drvdata(vdev);
 750         struct vpif_display_chan_config *chan_cfg;
 751
 752         chan_cfg = &config->chan_config[ch->channel_id];
 753         if (output->index >= chan_cfg->output_count) {
 754                 vpif_dbg(1, debug, "Invalid output index\n");
 755                 return -EINVAL;
 756         }
 757
 758         *output = chan_cfg->outputs[output->index].output;
 759         return 0;
 760 }
 761
 762 /**
 763  * vpif_output_to_subdev() - Maps output to sub device
 764  * @vpif_cfg: global config ptr
 765  * @chan_cfg: channel config ptr
 766  * @index: Given output index from application
 767  *
 768  * lookup the sub device information for a given output index.
 769  * we report all the output to application. output table also
 770  * has sub device name for the each output
 771  */
 772 static int
 773 vpif_output_to_subdev(struct vpif_display_config *vpif_cfg,
 774                       struct vpif_display_chan_config *chan_cfg, int index)
 775 {
 776         struct vpif_subdev_info *subdev_info;
 777         const char *subdev_name;
 778         int i;
 779
 780         vpif_dbg(2, debug, "vpif_output_to_subdev\n");
 781
 782         if (!chan_cfg->outputs)
 783                 return -1;
 784
 785         subdev_name = chan_cfg->outputs[index].subdev_name;
 786         if (!subdev_name)
 787                 return -1;
 788
 789         /* loop through the sub device list to get the sub device info */
 790         for (i = 0; i < vpif_cfg->subdev_count; i++) {
 791                 subdev_info = &vpif_cfg->subdevinfo[i];
 792                 if (!strcmp(subdev_info->name, subdev_name))
 793                         return i;
 794         }
 795         return -1;
 796 }
 797
 798 /**
 799  * vpif_set_output() - Select an output
 800  * @vpif_cfg: global config ptr
 801  * @ch: channel
 802  * @index: Given output index from application
 803  *
 804  * Select the given output.
 805  */
 806 static int vpif_set_output(struct vpif_display_config *vpif_cfg,
 807                       struct channel_obj *ch, int index)
 808 {
 809         struct vpif_display_chan_config *chan_cfg =
 810                 &vpif_cfg->chan_config[ch->channel_id];
 811         struct v4l2_subdev *sd = NULL;
 812         u32 input = 0, output = 0;
 813         int sd_index;
 814         int ret;
 815
 816         sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
 817         if (sd_index >= 0)
 818                 sd = vpif_obj.sd[sd_index];
 819
 820         if (sd) {
 821                 input = chan_cfg->outputs[index].input_route;
 822                 output = chan_cfg->outputs[index].output_route;
 823                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
 824                 if (ret < 0 && ret != -ENOIOCTLCMD) {
 825                         vpif_err("Failed to set output\n");
 826                         return ret;
 827                 }
 828
 829         }
 830         ch->output_idx = index;
 831         ch->sd = sd;
 832         if (chan_cfg->outputs)
 833                 /* update tvnorms from the sub device output info */
 834                 ch->video_dev.tvnorms = chan_cfg->outputs[index].output.std;
 835         return 0;
 836 }
 837
 838 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
 839 {
 840         struct vpif_display_config *config = vpif_dev->platform_data;
 841         struct video_device *vdev = video_devdata(file);
 842         struct channel_obj *ch = video_get_drvdata(vdev);
 843         struct vpif_display_chan_config *chan_cfg;
 844         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 845
 846         if (vb2_is_busy(&common->buffer_queue))
 847                 return -EBUSY;
 848
 849         chan_cfg = &config->chan_config[ch->channel_id];
 850
 851         if (i >= chan_cfg->output_count)
 852                 return -EINVAL;
 853
 854         return vpif_set_output(config, ch, i);
 855 }
 856
 857 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
 858 {
 859         struct video_device *vdev = video_devdata(file);
 860         struct channel_obj *ch = video_get_drvdata(vdev);
 861
 862         *i = ch->output_idx;
 863
 864         return 0;
 865 }
 866
 867 /**
 868  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
 869  * @file: file ptr
 870  * @priv: file handle
 871  * @timings: input timings
 872  */
 873 static int
 874 vpif_enum_dv_timings(struct file *file, void *priv,
 875                      struct v4l2_enum_dv_timings *timings)
 876 {
 877         struct vpif_display_config *config = vpif_dev->platform_data;
 878         struct video_device *vdev = video_devdata(file);
 879         struct channel_obj *ch = video_get_drvdata(vdev);
 880         struct vpif_display_chan_config *chan_cfg;
 881         struct v4l2_output output;
 882         int ret;
 883
 884         if (!config->chan_config[ch->channel_id].outputs)
 885                 return -ENODATA;
 886
 887         chan_cfg = &config->chan_config[ch->channel_id];
 888         output = chan_cfg->outputs[ch->output_idx].output;
 889         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
 890                 return -ENODATA;
 891
 892         timings->pad = 0;
 893
 894         ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
 895         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
 896                 return -EINVAL;
 897         return ret;
 898 }
 899
 900 /**
 901  * vpif_s_dv_timings() - S_DV_TIMINGS handler
 902  * @file: file ptr
 903  * @priv: file handle
 904  * @timings: digital video timings
 905  */
 906 static int vpif_s_dv_timings(struct file *file, void *priv,
 907                 struct v4l2_dv_timings *timings)
 908 {
 909         struct vpif_display_config *config = vpif_dev->platform_data;
 910         struct video_device *vdev = video_devdata(file);
 911         struct channel_obj *ch = video_get_drvdata(vdev);
 912         struct vpif_params *vpifparams = &ch->vpifparams;
 913         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 914         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 915         struct video_obj *vid_ch = &ch->video;
 916         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
 917         struct vpif_display_chan_config *chan_cfg;
 918         struct v4l2_output output;
 919         int ret;
 920
 921         if (!config->chan_config[ch->channel_id].outputs)
 922                 return -ENODATA;
 923
 924         chan_cfg = &config->chan_config[ch->channel_id];
 925         output = chan_cfg->outputs[ch->output_idx].output;
 926         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
 927                 return -ENODATA;
 928
 929         if (vb2_is_busy(&common->buffer_queue))
 930                 return -EBUSY;
 931
 932         if (timings->type != V4L2_DV_BT_656_1120) {
 933                 vpif_dbg(2, debug, "Timing type not defined\n");
 934                 return -EINVAL;
 935         }
 936
 937         /* Configure subdevice timings, if any */
 938         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
 939         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
 940                 ret = 0;
 941         if (ret < 0) {
 942                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
 943                 return ret;
 944         }
 945
 946         if (!(timings->bt.width && timings->bt.height &&
 947                                 (timings->bt.hbackporch ||
 948                                  timings->bt.hfrontporch ||
 949                                  timings->bt.hsync) &&
 950                                 timings->bt.vfrontporch &&
 951                                 (timings->bt.vbackporch ||
 952                                  timings->bt.vsync))) {
 953                 vpif_dbg(2, debug, "Timings for width, height, horizontal back porch, horizontal sync, horizontal front porch, vertical back porch, vertical sync and vertical back porch must be defined\n");
 954                 return -EINVAL;
 955         }
 956
 957         vid_ch->dv_timings = *timings;
 958
 959         /* Configure video port timings */
 960
 961         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
 962         std_info->sav2eav = bt->width;
 963
 964         std_info->l1 = 1;
 965         std_info->l3 = bt->vsync + bt->vbackporch + 1;
 966
 967         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
 968         if (bt->interlaced) {
 969                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
 970                         std_info->l5 = std_info->vsize/2 -
 971                                 (bt->vfrontporch - 1);
 972                         std_info->l7 = std_info->vsize/2 + 1;
 973                         std_info->l9 = std_info->l7 + bt->il_vsync +
 974                                 bt->il_vbackporch + 1;
 975                         std_info->l11 = std_info->vsize -
 976                                 (bt->il_vfrontporch - 1);
 977                 } else {
 978                         vpif_dbg(2, debug, "Required timing values for interlaced BT format missing\n");
 979                         return -EINVAL;
 980                 }
 981         } else {
 982                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
 983         }
 984         strscpy(std_info->name, "Custom timings BT656/1120",
 985                 sizeof(std_info->name));
 986         std_info->width = bt->width;
 987         std_info->height = bt->height;
 988         std_info->frm_fmt = bt->interlaced ? 0 : 1;
 989         std_info->ycmux_mode = 0;
 990         std_info->capture_format = 0;
 991         std_info->vbi_supported = 0;
 992         std_info->hd_sd = 1;
 993         std_info->stdid = 0;
 994         vid_ch->stdid = 0;
 995
 996         return 0;
 997 }
 998
 999 /**
1000  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1001  * @file: file ptr
1002  * @priv: file handle
1003  * @timings: digital video timings
1004  */
1005 static int vpif_g_dv_timings(struct file *file, void *priv,
1006                 struct v4l2_dv_timings *timings)
1007 {
1008         struct vpif_display_config *config = vpif_dev->platform_data;
1009         struct video_device *vdev = video_devdata(file);
1010         struct channel_obj *ch = video_get_drvdata(vdev);
1011         struct vpif_display_chan_config *chan_cfg;
1012         struct video_obj *vid_ch = &ch->video;
1013         struct v4l2_output output;
1014
1015         if (!config->chan_config[ch->channel_id].outputs)
1016                 goto error;
1017
1018         chan_cfg = &config->chan_config[ch->channel_id];
1019         output = chan_cfg->outputs[ch->output_idx].output;
1020
1021         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
1022                 goto error;
1023
1024         *timings = vid_ch->dv_timings;
1025
1026         return 0;
1027 error:
1028         return -ENODATA;
1029 }
1030
1031 /*
1032  * vpif_log_status() - Status information
1033  * @file: file ptr
1034  * @priv: file handle
1035  *
1036  * Returns zero.
1037  */
1038 static int vpif_log_status(struct file *filep, void *priv)
1039 {
1040         /* status for sub devices */
1041         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1042
1043         return 0;
1044 }
1045
1046 /* vpif display ioctl operations */
1047 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1048         .vidioc_querycap                = vpif_querycap,
1049         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1050         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1051         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1052         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1053
1054         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1055         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1056         .vidioc_querybuf                = vb2_ioctl_querybuf,
1057         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1058         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1059         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1060         .vidioc_streamon                = vb2_ioctl_streamon,
1061         .vidioc_streamoff               = vb2_ioctl_streamoff,
1062
1063         .vidioc_s_std                   = vpif_s_std,
1064         .vidioc_g_std                   = vpif_g_std,
1065
1066         .vidioc_enum_output             = vpif_enum_output,
1067         .vidioc_s_output                = vpif_s_output,
1068         .vidioc_g_output                = vpif_g_output,
1069
1070         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1071         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1072         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1073
1074         .vidioc_log_status              = vpif_log_status,
1075 };
1076
1077 static const struct v4l2_file_operations vpif_fops = {
1078         .owner          = THIS_MODULE,
1079         .open           = v4l2_fh_open,
1080         .release        = vb2_fop_release,
1081         .unlocked_ioctl = video_ioctl2,
1082         .mmap           = vb2_fop_mmap,
1083         .poll           = vb2_fop_poll
1084 };
1085
1086 /*Configure the channels, buffer sizei, request irq */
1087 static int initialize_vpif(void)
1088 {
1089         int free_channel_objects_index;
1090         int err, i, j;
1091
1092         /* Allocate memory for six channel objects */
1093         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1094                 vpif_obj.dev[i] =
1095                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1096                 /* If memory allocation fails, return error */
1097                 if (!vpif_obj.dev[i]) {
1098                         free_channel_objects_index = i;
1099                         err = -ENOMEM;
1100                         goto vpif_init_free_channel_objects;
1101                 }
1102         }
1103
1104         return 0;
1105
1106 vpif_init_free_channel_objects:
1107         for (j = 0; j < free_channel_objects_index; j++)
1108                 kfree(vpif_obj.dev[j]);
1109         return err;
1110 }
1111
1112 static void free_vpif_objs(void)
1113 {
1114         int i;
1115
1116         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++)
1117                 kfree(vpif_obj.dev[i]);
1118 }
1119
1120 static int vpif_probe_complete(void)
1121 {
1122         struct common_obj *common;
1123         struct video_device *vdev;
1124         struct channel_obj *ch;
1125         struct vb2_queue *q;
1126         int j, err, k;
1127
1128         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1129                 ch = vpif_obj.dev[j];
1130                 /* Initialize field of the channel objects */
1131                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1132                         common = &ch->common[k];
1133                         spin_lock_init(&common->irqlock);
1134                         mutex_init(&common->lock);
1135                         common->set_addr = NULL;
1136                         common->ytop_off = 0;
1137                         common->ybtm_off = 0;
1138                         common->ctop_off = 0;
1139                         common->cbtm_off = 0;
1140                         common->cur_frm = NULL;
1141                         common->next_frm = NULL;
1142                         memset(&common->fmt, 0, sizeof(common->fmt));
1143                 }
1144                 ch->initialized = 0;
1145                 if (vpif_obj.config->subdev_count)
1146                         ch->sd = vpif_obj.sd[0];
1147                 ch->channel_id = j;
1148
1149                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1150
1151                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1152                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1153
1154                 /* select output 0 */
1155                 err = vpif_set_output(vpif_obj.config, ch, 0);
1156                 if (err)
1157                         goto probe_out;
1158
1159                 /* set initial format */
1160                 ch->video.stdid = V4L2_STD_525_60;
1161                 memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1162                 vpif_update_resolution(ch);
1163
1164                 /* Initialize vb2 queue */
1165                 q = &common->buffer_queue;
1166                 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1167                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1168                 q->drv_priv = ch;
1169                 q->ops = &video_qops;
1170                 q->mem_ops = &vb2_dma_contig_memops;
1171                 q->buf_struct_size = sizeof(struct vpif_disp_buffer);
1172                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1173                 q->min_buffers_needed = 1;
1174                 q->lock = &common->lock;
1175                 q->dev = vpif_dev;
1176                 err = vb2_queue_init(q);
1177                 if (err) {
1178                         vpif_err("vpif_display: vb2_queue_init() failed\n");
1179                         goto probe_out;
1180                 }
1181
1182                 INIT_LIST_HEAD(&common->dma_queue);
1183
1184                 /* register video device */
1185                 vpif_dbg(1, debug, "channel=%p,channel->video_dev=%p\n",
1186                          ch, &ch->video_dev);
1187
1188                 /* Initialize the video_device structure */
1189                 vdev = &ch->video_dev;
1190                 strscpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
1191                 vdev->release = video_device_release_empty;
1192                 vdev->fops = &vpif_fops;
1193                 vdev->ioctl_ops = &vpif_ioctl_ops;
1194                 vdev->v4l2_dev = &vpif_obj.v4l2_dev;
1195                 vdev->vfl_dir = VFL_DIR_TX;
1196                 vdev->queue = q;
1197                 vdev->lock = &common->lock;
1198                 vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
1199                 video_set_drvdata(&ch->video_dev, ch);
1200                 err = video_register_device(vdev, VFL_TYPE_VIDEO,
1201                                             (j ? 3 : 2));
1202                 if (err < 0)
1203                         goto probe_out;
1204         }
1205
1206         return 0;
1207
1208 probe_out:
1209         for (k = 0; k < j; k++) {
1210                 ch = vpif_obj.dev[k];
1211                 video_unregister_device(&ch->video_dev);
1212         }
1213         return err;
1214 }
1215
1216 /*
1217  * vpif_probe: This function creates device entries by register itself to the
1218  * V4L2 driver and initializes fields of each channel objects
1219  */
1220 static __init int vpif_probe(struct platform_device *pdev)
1221 {
1222         struct vpif_subdev_info *subdevdata;
1223         struct i2c_adapter *i2c_adap;
1224         int subdev_count;
1225         int res_idx = 0;
1226         int i, err;
1227
1228         if (!pdev->dev.platform_data) {
1229                 dev_warn(&pdev->dev, "Missing platform data.  Giving up.\n");
1230                 return -EINVAL;
1231         }
1232
1233         vpif_dev = &pdev->dev;
1234         err = initialize_vpif();
1235
1236         if (err) {
1237                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1238                 return err;
1239         }
1240
1241         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1242         if (err) {
1243                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1244                 goto vpif_free;
1245         }
1246
1247         do {
1248                 int irq;
1249
1250                 err = platform_get_irq_optional(pdev, res_idx);
1251                 if (err < 0 && err != -ENXIO)
1252                         goto vpif_unregister;
1253                 if (err > 0)
1254                         irq = err;
1255                 else
1256                         break;
1257
1258                 err = devm_request_irq(&pdev->dev, irq, vpif_channel_isr,
1259                                        IRQF_SHARED, VPIF_DRIVER_NAME,
1260                                        (void *)(&vpif_obj.dev[res_idx]->channel_id));
1261                 if (err) {
1262                         vpif_err("VPIF IRQ request failed\n");
1263                         goto vpif_unregister;
1264                 }
1265         } while (++res_idx);
1266
1267         vpif_obj.config = pdev->dev.platform_data;
1268         subdev_count = vpif_obj.config->subdev_count;
1269         subdevdata = vpif_obj.config->subdevinfo;
1270         vpif_obj.sd = kcalloc(subdev_count, sizeof(*vpif_obj.sd), GFP_KERNEL);
1271         if (!vpif_obj.sd) {
1272                 err = -ENOMEM;
1273                 goto vpif_unregister;
1274         }
1275
1276         i2c_adap = i2c_get_adapter(vpif_obj.config->i2c_adapter_id);
1277         for (i = 0; i < subdev_count; i++) {
1278                 vpif_obj.sd[i] =
1279                         v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1280                                                   i2c_adap,
1281                                                   &subdevdata[i].board_info,
1282                                                   NULL);
1283                 if (!vpif_obj.sd[i]) {
1284                         vpif_err("Error registering v4l2 subdevice\n");
1285                         err = -ENODEV;
1286                         goto probe_subdev_out;
1287                 }
1288
1289                 if (vpif_obj.sd[i])
1290                         vpif_obj.sd[i]->grp_id = 1 << i;
1291         }
1292         err = vpif_probe_complete();
1293         if (err)
1294                 goto probe_subdev_out;
1295
1296         return 0;
1297
1298 probe_subdev_out:
1299         kfree(vpif_obj.sd);
1300 vpif_unregister:
1301         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1302 vpif_free:
1303         free_vpif_objs();
1304
1305         return err;
1306 }
1307
1308 /*
1309  * vpif_remove: It un-register channels from V4L2 driver
1310  */
1311 static int vpif_remove(struct platform_device *device)
1312 {
1313         struct channel_obj *ch;
1314         int i;
1315
1316         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1317
1318         kfree(vpif_obj.sd);
1319         /* un-register device */
1320         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1321                 /* Get the pointer to the channel object */
1322                 ch = vpif_obj.dev[i];
1323                 /* Unregister video device */
1324                 video_unregister_device(&ch->video_dev);
1325         }
1326         free_vpif_objs();
1327
1328         return 0;
1329 }
1330
1331 #ifdef CONFIG_PM_SLEEP
1332 static int vpif_suspend(struct device *dev)
1333 {
1334         struct common_obj *common;
1335         struct channel_obj *ch;
1336         int i;
1337
1338         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1339                 /* Get the pointer to the channel object */
1340                 ch = vpif_obj.dev[i];
1341                 common = &ch->common[VPIF_VIDEO_INDEX];
1342
1343                 if (!vb2_start_streaming_called(&common->buffer_queue))
1344                         continue;
1345
1346                 mutex_lock(&common->lock);
1347                 /* Disable channel */
1348                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1349                         enable_channel2(0);
1350                         channel2_intr_enable(0);
1351                 }
1352                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1353                         ycmux_mode == 2) {
1354                         enable_channel3(0);
1355                         channel3_intr_enable(0);
1356                 }
1357                 mutex_unlock(&common->lock);
1358         }
1359
1360         return 0;
1361 }
1362
1363 static int vpif_resume(struct device *dev)
1364 {
1365
1366         struct common_obj *common;
1367         struct channel_obj *ch;
1368         int i;
1369
1370         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1371                 /* Get the pointer to the channel object */
1372                 ch = vpif_obj.dev[i];
1373                 common = &ch->common[VPIF_VIDEO_INDEX];
1374
1375                 if (!vb2_start_streaming_called(&common->buffer_queue))
1376                         continue;
1377
1378                 mutex_lock(&common->lock);
1379                 /* Enable channel */
1380                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1381                         enable_channel2(1);
1382                         channel2_intr_enable(1);
1383                 }
1384                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1385                                 ycmux_mode == 2) {
1386                         enable_channel3(1);
1387                         channel3_intr_enable(1);
1388                 }
1389                 mutex_unlock(&common->lock);
1390         }
1391
1392         return 0;
1393 }
1394
1395 #endif
1396
1397 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
1398
1399 static __refdata struct platform_driver vpif_driver = {
1400         .driver = {
1401                         .name   = VPIF_DRIVER_NAME,
1402                         .pm     = &vpif_pm_ops,
1403         },
1404         .probe  = vpif_probe,
1405         .remove = vpif_remove,
1406 };
1407
1408 module_platform_driver(vpif_driver);