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