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 struct vpif_disp_buffer *to_vpif_buffer(struct vb2_buffer *vb)
  57 {
  58         return container_of(vb, struct vpif_disp_buffer, vb);
  59 }
  60
  61 /**
  62  * vpif_buffer_prepare :  callback function for buffer prepare
  63  * @vb: ptr to vb2_buffer
  64  *
  65  * This is the callback function for buffer prepare when vb2_qbuf()
  66  * function is called. The buffer is prepared and user space virtual address
  67  * or user address is converted into  physical address
  68  */
  69 static int vpif_buffer_prepare(struct vb2_buffer *vb)
  70 {
  71         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
  72         struct common_obj *common;
  73
  74         common = &ch->common[VPIF_VIDEO_INDEX];
  75
  76         vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
  77         if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
  78                 return -EINVAL;
  79
  80         vb->v4l2_buf.field = common->fmt.fmt.pix.field;
  81
  82         if (vb->vb2_queue->type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) {
  83                 unsigned long addr = vb2_dma_contig_plane_dma_addr(vb, 0);
  84
  85                 if (!ISALIGNED(addr + common->ytop_off) ||
  86                         !ISALIGNED(addr + common->ybtm_off) ||
  87                         !ISALIGNED(addr + common->ctop_off) ||
  88                         !ISALIGNED(addr + common->cbtm_off)) {
  89                         vpif_err("buffer offset not aligned to 8 bytes\n");
  90                         return -EINVAL;
  91                 }
  92         }
  93
  94         return 0;
  95 }
  96
  97 /**
  98  * vpif_buffer_queue_setup : Callback function for buffer setup.
  99  * @vq: vb2_queue ptr
 100  * @fmt: v4l2 format
 101  * @nbuffers: ptr to number of buffers requested by application
 102  * @nplanes:: contains number of distinct video planes needed to hold a frame
 103  * @sizes[]: contains the size (in bytes) of each plane.
 104  * @alloc_ctxs: ptr to allocation context
 105  *
 106  * This callback function is called when reqbuf() is called to adjust
 107  * the buffer count and buffer size
 108  */
 109 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 110                                 const struct v4l2_format *fmt,
 111                                 unsigned int *nbuffers, unsigned int *nplanes,
 112                                 unsigned int sizes[], void *alloc_ctxs[])
 113 {
 114         struct channel_obj *ch = vb2_get_drv_priv(vq);
 115         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 116
 117         if (fmt && fmt->fmt.pix.sizeimage < common->fmt.fmt.pix.sizeimage)
 118                 return -EINVAL;
 119
 120         if (vq->num_buffers + *nbuffers < 3)
 121                 *nbuffers = 3 - vq->num_buffers;
 122
 123         *nplanes = 1;
 124         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : common->fmt.fmt.pix.sizeimage;
 125         alloc_ctxs[0] = common->alloc_ctx;
 126
 127         /* Calculate the offset for Y and C data  in the buffer */
 128         vpif_calculate_offsets(ch);
 129
 130         return 0;
 131 }
 132
 133 /**
 134  * vpif_buffer_queue : Callback function to add buffer to DMA queue
 135  * @vb: ptr to vb2_buffer
 136  *
 137  * This callback fucntion queues the buffer to DMA engine
 138  */
 139 static void vpif_buffer_queue(struct vb2_buffer *vb)
 140 {
 141         struct vpif_disp_buffer *buf = to_vpif_buffer(vb);
 142         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
 143         struct common_obj *common;
 144         unsigned long flags;
 145
 146         common = &ch->common[VPIF_VIDEO_INDEX];
 147
 148         /* add the buffer to the DMA queue */
 149         spin_lock_irqsave(&common->irqlock, flags);
 150         list_add_tail(&buf->list, &common->dma_queue);
 151         spin_unlock_irqrestore(&common->irqlock, flags);
 152 }
 153
 154 /**
 155  * vpif_start_streaming : Starts the DMA engine for streaming
 156  * @vb: ptr to vb2_buffer
 157  * @count: number of buffers
 158  */
 159 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 160 {
 161         struct vpif_display_config *vpif_config_data =
 162                                         vpif_dev->platform_data;
 163         struct channel_obj *ch = vb2_get_drv_priv(vq);
 164         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 165         struct vpif_params *vpif = &ch->vpifparams;
 166         struct vpif_disp_buffer *buf, *tmp;
 167         unsigned long addr, flags;
 168         int ret;
 169
 170         spin_lock_irqsave(&common->irqlock, flags);
 171
 172         /* Initialize field_id */
 173         ch->field_id = 0;
 174
 175         /* clock settings */
 176         if (vpif_config_data->set_clock) {
 177                 ret = vpif_config_data->set_clock(ch->vpifparams.std_info.
 178                 ycmux_mode, ch->vpifparams.std_info.hd_sd);
 179                 if (ret < 0) {
 180                         vpif_err("can't set clock\n");
 181                         goto err;
 182                 }
 183         }
 184
 185         /* set the parameters and addresses */
 186         ret = vpif_set_video_params(vpif, ch->channel_id + 2);
 187         if (ret < 0)
 188                 goto err;
 189
 190         ycmux_mode = ret;
 191         vpif_config_addr(ch, ret);
 192         /* Get the next frame from the buffer queue */
 193         common->next_frm = common->cur_frm =
 194                             list_entry(common->dma_queue.next,
 195                                        struct vpif_disp_buffer, list);
 196
 197         list_del(&common->cur_frm->list);
 198         spin_unlock_irqrestore(&common->irqlock, flags);
 199         /* Mark state of the current frame to active */
 200         common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 201
 202         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
 203         common->set_addr((addr + common->ytop_off),
 204                             (addr + common->ybtm_off),
 205                             (addr + common->ctop_off),
 206                             (addr + common->cbtm_off));
 207
 208         /*
 209          * Set interrupt for both the fields in VPIF
 210          * Register enable channel in VPIF register
 211          */
 212         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
 213         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 214                 channel2_intr_assert();
 215                 channel2_intr_enable(1);
 216                 enable_channel2(1);
 217                 if (vpif_config_data->chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
 218                         channel2_clipping_enable(1);
 219         }
 220
 221         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
 222                 channel3_intr_assert();
 223                 channel3_intr_enable(1);
 224                 enable_channel3(1);
 225                 if (vpif_config_data->chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
 226                         channel3_clipping_enable(1);
 227         }
 228
 229         return 0;
 230
 231 err:
 232         list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
 233                 list_del(&buf->list);
 234                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
 235         }
 236
 237         return ret;
 238 }
 239
 240 /**
 241  * vpif_stop_streaming : Stop the DMA engine
 242  * @vq: ptr to vb2_queue
 243  *
 244  * This callback stops the DMA engine and any remaining buffers
 245  * in the DMA queue are released.
 246  */
 247 static void vpif_stop_streaming(struct vb2_queue *vq)
 248 {
 249         struct channel_obj *ch = vb2_get_drv_priv(vq);
 250         struct common_obj *common;
 251         unsigned long flags;
 252
 253         common = &ch->common[VPIF_VIDEO_INDEX];
 254
 255         /* Disable channel */
 256         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 257                 enable_channel2(0);
 258                 channel2_intr_enable(0);
 259         }
 260         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
 261                 enable_channel3(0);
 262                 channel3_intr_enable(0);
 263         }
 264
 265         /* release all active buffers */
 266         spin_lock_irqsave(&common->irqlock, flags);
 267         if (common->cur_frm == common->next_frm) {
 268                 vb2_buffer_done(&common->cur_frm->vb, VB2_BUF_STATE_ERROR);
 269         } else {
 270                 if (common->cur_frm != NULL)
 271                         vb2_buffer_done(&common->cur_frm->vb,
 272                                         VB2_BUF_STATE_ERROR);
 273                 if (common->next_frm != NULL)
 274                         vb2_buffer_done(&common->next_frm->vb,
 275                                         VB2_BUF_STATE_ERROR);
 276         }
 277
 278         while (!list_empty(&common->dma_queue)) {
 279                 common->next_frm = list_entry(common->dma_queue.next,
 280                                                 struct vpif_disp_buffer, list);
 281                 list_del(&common->next_frm->list);
 282                 vb2_buffer_done(&common->next_frm->vb, VB2_BUF_STATE_ERROR);
 283         }
 284         spin_unlock_irqrestore(&common->irqlock, flags);
 285 }
 286
 287 static struct vb2_ops video_qops = {
 288         .queue_setup            = vpif_buffer_queue_setup,
 289         .wait_prepare           = vb2_ops_wait_prepare,
 290         .wait_finish            = vb2_ops_wait_finish,
 291         .buf_prepare            = vpif_buffer_prepare,
 292         .start_streaming        = vpif_start_streaming,
 293         .stop_streaming         = vpif_stop_streaming,
 294         .buf_queue              = vpif_buffer_queue,
 295 };
 296
 297 static void process_progressive_mode(struct common_obj *common)
 298 {
 299         unsigned long addr = 0;
 300
 301         spin_lock(&common->irqlock);
 302         /* Get the next buffer from buffer queue */
 303         common->next_frm = list_entry(common->dma_queue.next,
 304                                 struct vpif_disp_buffer, list);
 305         /* Remove that buffer from the buffer queue */
 306         list_del(&common->next_frm->list);
 307         spin_unlock(&common->irqlock);
 308         /* Mark status of the buffer as active */
 309         common->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 310
 311         /* Set top and bottom field addrs in VPIF registers */
 312         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb, 0);
 313         common->set_addr(addr + common->ytop_off,
 314                                  addr + common->ybtm_off,
 315                                  addr + common->ctop_off,
 316                                  addr + common->cbtm_off);
 317 }
 318
 319 static void process_interlaced_mode(int fid, struct common_obj *common)
 320 {
 321         /* device field id and local field id are in sync */
 322         /* If this is even field */
 323         if (0 == fid) {
 324                 if (common->cur_frm == common->next_frm)
 325                         return;
 326
 327                 /* one frame is displayed If next frame is
 328                  *  available, release cur_frm and move on */
 329                 /* Copy frame display time */
 330                 v4l2_get_timestamp(&common->cur_frm->vb.v4l2_buf.timestamp);
 331                 /* Change status of the cur_frm */
 332                 vb2_buffer_done(&common->cur_frm->vb,
 333                                             VB2_BUF_STATE_DONE);
 334                 /* Make cur_frm pointing to next_frm */
 335                 common->cur_frm = common->next_frm;
 336
 337         } else if (1 == fid) {  /* odd field */
 338                 spin_lock(&common->irqlock);
 339                 if (list_empty(&common->dma_queue)
 340                     || (common->cur_frm != common->next_frm)) {
 341                         spin_unlock(&common->irqlock);
 342                         return;
 343                 }
 344                 spin_unlock(&common->irqlock);
 345                 /* one field is displayed configure the next
 346                  * frame if it is available else hold on current
 347                  * frame */
 348                 /* Get next from the buffer queue */
 349                 process_progressive_mode(common);
 350         }
 351 }
 352
 353 /*
 354  * vpif_channel_isr: It changes status of the displayed buffer, takes next
 355  * buffer from the queue and sets its address in VPIF registers
 356  */
 357 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 358 {
 359         struct vpif_device *dev = &vpif_obj;
 360         struct channel_obj *ch;
 361         struct common_obj *common;
 362         enum v4l2_field field;
 363         int fid = -1, i;
 364         int channel_id = 0;
 365
 366         channel_id = *(int *)(dev_id);
 367         if (!vpif_intr_status(channel_id + 2))
 368                 return IRQ_NONE;
 369
 370         ch = dev->dev[channel_id];
 371         field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
 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(&common->cur_frm->vb.
 389                                                    v4l2_buf.timestamp);
 390                                 vb2_buffer_done(&common->cur_frm->vb,
 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, vpitch, 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         vpitch = sizeimage / (hpitch * 2);
 519         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 520             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 521                 common->ytop_off = 0;
 522                 common->ybtm_off = hpitch;
 523                 common->ctop_off = sizeimage / 2;
 524                 common->cbtm_off = sizeimage / 2 + hpitch;
 525         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 526                 common->ytop_off = 0;
 527                 common->ybtm_off = sizeimage / 4;
 528                 common->ctop_off = sizeimage / 2;
 529                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 530         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 531                 common->ybtm_off = 0;
 532                 common->ytop_off = sizeimage / 4;
 533                 common->cbtm_off = sizeimage / 2;
 534                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 535         }
 536
 537         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 538             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 539                 vpifparams->video_params.storage_mode = 1;
 540         } else {
 541                 vpifparams->video_params.storage_mode = 0;
 542         }
 543
 544         if (ch->vpifparams.std_info.frm_fmt == 1) {
 545                 vpifparams->video_params.hpitch =
 546                     common->fmt.fmt.pix.bytesperline;
 547         } else {
 548                 if ((field == V4L2_FIELD_ANY) ||
 549                         (field == V4L2_FIELD_INTERLACED))
 550                         vpifparams->video_params.hpitch =
 551                             common->fmt.fmt.pix.bytesperline * 2;
 552                 else
 553                         vpifparams->video_params.hpitch =
 554                             common->fmt.fmt.pix.bytesperline;
 555         }
 556
 557         ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
 558 }
 559
 560 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 561 {
 562         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 563
 564         if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
 565                 common->set_addr = ch3_set_videobuf_addr;
 566         } else {
 567                 if (2 == muxmode)
 568                         common->set_addr = ch2_set_videobuf_addr_yc_nmux;
 569                 else
 570                         common->set_addr = ch2_set_videobuf_addr;
 571         }
 572 }
 573
 574 /* functions implementing ioctls */
 575 /**
 576  * vpif_querycap() - QUERYCAP handler
 577  * @file: file ptr
 578  * @priv: file handle
 579  * @cap: ptr to v4l2_capability structure
 580  */
 581 static int vpif_querycap(struct file *file, void  *priv,
 582                                 struct v4l2_capability *cap)
 583 {
 584         struct vpif_display_config *config = vpif_dev->platform_data;
 585
 586         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 587         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 588         strlcpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
 589         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 590                  dev_name(vpif_dev));
 591         strlcpy(cap->card, config->card_name, sizeof(cap->card));
 592
 593         return 0;
 594 }
 595
 596 static int vpif_enum_fmt_vid_out(struct file *file, void  *priv,
 597                                         struct v4l2_fmtdesc *fmt)
 598 {
 599         if (fmt->index != 0)
 600                 return -EINVAL;
 601
 602         /* Fill in the information about format */
 603         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 604         strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
 605         fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 606         fmt->flags = 0;
 607         return 0;
 608 }
 609
 610 static int vpif_g_fmt_vid_out(struct file *file, void *priv,
 611                                 struct v4l2_format *fmt)
 612 {
 613         struct video_device *vdev = video_devdata(file);
 614         struct channel_obj *ch = video_get_drvdata(vdev);
 615         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 616
 617         /* Check the validity of the buffer type */
 618         if (common->fmt.type != fmt->type)
 619                 return -EINVAL;
 620
 621         if (vpif_update_resolution(ch))
 622                 return -EINVAL;
 623         *fmt = common->fmt;
 624         return 0;
 625 }
 626
 627 static int vpif_try_fmt_vid_out(struct file *file, void *priv,
 628                                 struct v4l2_format *fmt)
 629 {
 630         struct video_device *vdev = video_devdata(file);
 631         struct channel_obj *ch = video_get_drvdata(vdev);
 632         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 633         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 634
 635         /*
 636          * to supress v4l-compliance warnings silently correct
 637          * the pixelformat
 638          */
 639         if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
 640                 pixfmt->pixelformat = common->fmt.fmt.pix.pixelformat;
 641
 642         if (vpif_update_resolution(ch))
 643                 return -EINVAL;
 644
 645         pixfmt->colorspace = common->fmt.fmt.pix.colorspace;
 646         pixfmt->field = common->fmt.fmt.pix.field;
 647         pixfmt->bytesperline = common->fmt.fmt.pix.width;
 648         pixfmt->width = common->fmt.fmt.pix.width;
 649         pixfmt->height = common->fmt.fmt.pix.height;
 650         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height * 2;
 651         pixfmt->priv = 0;
 652
 653         return 0;
 654 }
 655
 656 static int vpif_s_fmt_vid_out(struct file *file, void *priv,
 657                                 struct v4l2_format *fmt)
 658 {
 659         struct video_device *vdev = video_devdata(file);
 660         struct channel_obj *ch = video_get_drvdata(vdev);
 661         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 662         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 663         int ret;
 664
 665         if (vb2_is_busy(&common->buffer_queue))
 666                 return -EBUSY;
 667
 668         ret = vpif_try_fmt_vid_out(file, priv, fmt);
 669         if (ret)
 670                 return ret;
 671
 672         /* store the pix format in the channel object */
 673         common->fmt.fmt.pix = *pixfmt;
 674
 675         /* store the format in the channel object */
 676         common->fmt = *fmt;
 677         return 0;
 678 }
 679
 680 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
 681 {
 682         struct vpif_display_config *config = vpif_dev->platform_data;
 683         struct video_device *vdev = video_devdata(file);
 684         struct channel_obj *ch = video_get_drvdata(vdev);
 685         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 686         struct vpif_display_chan_config *chan_cfg;
 687         struct v4l2_output output;
 688         int ret;
 689
 690         if (config->chan_config[ch->channel_id].outputs == NULL)
 691                 return -ENODATA;
 692
 693         chan_cfg = &config->chan_config[ch->channel_id];
 694         output = chan_cfg->outputs[ch->output_idx].output;
 695         if (output.capabilities != V4L2_OUT_CAP_STD)
 696                 return -ENODATA;
 697
 698         if (vb2_is_busy(&common->buffer_queue))
 699                 return -EBUSY;
 700
 701
 702         if (!(std_id & VPIF_V4L2_STD))
 703                 return -EINVAL;
 704
 705         /* Call encoder subdevice function to set the standard */
 706         ch->video.stdid = std_id;
 707         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
 708         /* Get the information about the standard */
 709         if (vpif_update_resolution(ch))
 710                 return -EINVAL;
 711
 712         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
 713
 714         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
 715                                                 s_std_output, std_id);
 716         if (ret < 0) {
 717                 vpif_err("Failed to set output standard\n");
 718                 return ret;
 719         }
 720
 721         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
 722                                                         s_std, std_id);
 723         if (ret < 0)
 724                 vpif_err("Failed to set standard for sub devices\n");
 725         return ret;
 726 }
 727
 728 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
 729 {
 730         struct vpif_display_config *config = vpif_dev->platform_data;
 731         struct video_device *vdev = video_devdata(file);
 732         struct channel_obj *ch = video_get_drvdata(vdev);
 733         struct vpif_display_chan_config *chan_cfg;
 734         struct v4l2_output output;
 735
 736         if (config->chan_config[ch->channel_id].outputs == NULL)
 737                 return -ENODATA;
 738
 739         chan_cfg = &config->chan_config[ch->channel_id];
 740         output = chan_cfg->outputs[ch->output_idx].output;
 741         if (output.capabilities != V4L2_OUT_CAP_STD)
 742                 return -ENODATA;
 743
 744         *std = ch->video.stdid;
 745         return 0;
 746 }
 747
 748 static int vpif_enum_output(struct file *file, void *fh,
 749                                 struct v4l2_output *output)
 750 {
 751
 752         struct vpif_display_config *config = vpif_dev->platform_data;
 753         struct video_device *vdev = video_devdata(file);
 754         struct channel_obj *ch = video_get_drvdata(vdev);
 755         struct vpif_display_chan_config *chan_cfg;
 756
 757         chan_cfg = &config->chan_config[ch->channel_id];
 758         if (output->index >= chan_cfg->output_count) {
 759                 vpif_dbg(1, debug, "Invalid output index\n");
 760                 return -EINVAL;
 761         }
 762
 763         *output = chan_cfg->outputs[output->index].output;
 764         return 0;
 765 }
 766
 767 /**
 768  * vpif_output_to_subdev() - Maps output to sub device
 769  * @vpif_cfg - global config ptr
 770  * @chan_cfg - channel config ptr
 771  * @index - Given output index from application
 772  *
 773  * lookup the sub device information for a given output index.
 774  * we report all the output to application. output table also
 775  * has sub device name for the each output
 776  */
 777 static int
 778 vpif_output_to_subdev(struct vpif_display_config *vpif_cfg,
 779                       struct vpif_display_chan_config *chan_cfg, int index)
 780 {
 781         struct vpif_subdev_info *subdev_info;
 782         const char *subdev_name;
 783         int i;
 784
 785         vpif_dbg(2, debug, "vpif_output_to_subdev\n");
 786
 787         if (chan_cfg->outputs == NULL)
 788                 return -1;
 789
 790         subdev_name = chan_cfg->outputs[index].subdev_name;
 791         if (subdev_name == NULL)
 792                 return -1;
 793
 794         /* loop through the sub device list to get the sub device info */
 795         for (i = 0; i < vpif_cfg->subdev_count; i++) {
 796                 subdev_info = &vpif_cfg->subdevinfo[i];
 797                 if (!strcmp(subdev_info->name, subdev_name))
 798                         return i;
 799         }
 800         return -1;
 801 }
 802
 803 /**
 804  * vpif_set_output() - Select an output
 805  * @vpif_cfg - global config ptr
 806  * @ch - channel
 807  * @index - Given output index from application
 808  *
 809  * Select the given output.
 810  */
 811 static int vpif_set_output(struct vpif_display_config *vpif_cfg,
 812                       struct channel_obj *ch, int index)
 813 {
 814         struct vpif_display_chan_config *chan_cfg =
 815                 &vpif_cfg->chan_config[ch->channel_id];
 816         struct vpif_subdev_info *subdev_info = NULL;
 817         struct v4l2_subdev *sd = NULL;
 818         u32 input = 0, output = 0;
 819         int sd_index;
 820         int ret;
 821
 822         sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
 823         if (sd_index >= 0) {
 824                 sd = vpif_obj.sd[sd_index];
 825                 subdev_info = &vpif_cfg->subdevinfo[sd_index];
 826         }
 827
 828         if (sd) {
 829                 input = chan_cfg->outputs[index].input_route;
 830                 output = chan_cfg->outputs[index].output_route;
 831                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
 832                 if (ret < 0 && ret != -ENOIOCTLCMD) {
 833                         vpif_err("Failed to set output\n");
 834                         return ret;
 835                 }
 836
 837         }
 838         ch->output_idx = index;
 839         ch->sd = sd;
 840         if (chan_cfg->outputs != NULL)
 841                 /* update tvnorms from the sub device output info */
 842                 ch->video_dev->tvnorms = chan_cfg->outputs[index].output.std;
 843         return 0;
 844 }
 845
 846 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
 847 {
 848         struct vpif_display_config *config = vpif_dev->platform_data;
 849         struct video_device *vdev = video_devdata(file);
 850         struct channel_obj *ch = video_get_drvdata(vdev);
 851         struct vpif_display_chan_config *chan_cfg;
 852         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 853
 854         if (vb2_is_busy(&common->buffer_queue))
 855                 return -EBUSY;
 856
 857         chan_cfg = &config->chan_config[ch->channel_id];
 858
 859         if (i >= chan_cfg->output_count)
 860                 return -EINVAL;
 861
 862         return vpif_set_output(config, ch, i);
 863 }
 864
 865 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
 866 {
 867         struct video_device *vdev = video_devdata(file);
 868         struct channel_obj *ch = video_get_drvdata(vdev);
 869
 870         *i = ch->output_idx;
 871
 872         return 0;
 873 }
 874
 875 /**
 876  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
 877  * @file: file ptr
 878  * @priv: file handle
 879  * @timings: input timings
 880  */
 881 static int
 882 vpif_enum_dv_timings(struct file *file, void *priv,
 883                      struct v4l2_enum_dv_timings *timings)
 884 {
 885         struct vpif_display_config *config = vpif_dev->platform_data;
 886         struct video_device *vdev = video_devdata(file);
 887         struct channel_obj *ch = video_get_drvdata(vdev);
 888         struct vpif_display_chan_config *chan_cfg;
 889         struct v4l2_output output;
 890         int ret;
 891
 892         if (config->chan_config[ch->channel_id].outputs == NULL)
 893                 return -ENODATA;
 894
 895         chan_cfg = &config->chan_config[ch->channel_id];
 896         output = chan_cfg->outputs[ch->output_idx].output;
 897         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
 898                 return -ENODATA;
 899
 900         timings->pad = 0;
 901
 902         ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
 903         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
 904                 return -EINVAL;
 905         return ret;
 906 }
 907
 908 /**
 909  * vpif_s_dv_timings() - S_DV_TIMINGS handler
 910  * @file: file ptr
 911  * @priv: file handle
 912  * @timings: digital video timings
 913  */
 914 static int vpif_s_dv_timings(struct file *file, void *priv,
 915                 struct v4l2_dv_timings *timings)
 916 {
 917         struct vpif_display_config *config = vpif_dev->platform_data;
 918         struct video_device *vdev = video_devdata(file);
 919         struct channel_obj *ch = video_get_drvdata(vdev);
 920         struct vpif_params *vpifparams = &ch->vpifparams;
 921         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 922         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 923         struct video_obj *vid_ch = &ch->video;
 924         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
 925         struct vpif_display_chan_config *chan_cfg;
 926         struct v4l2_output output;
 927         int ret;
 928
 929         if (config->chan_config[ch->channel_id].outputs == NULL)
 930                 return -ENODATA;
 931
 932         chan_cfg = &config->chan_config[ch->channel_id];
 933         output = chan_cfg->outputs[ch->output_idx].output;
 934         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
 935                 return -ENODATA;
 936
 937         if (vb2_is_busy(&common->buffer_queue))
 938                 return -EBUSY;
 939
 940         if (timings->type != V4L2_DV_BT_656_1120) {
 941                 vpif_dbg(2, debug, "Timing type not defined\n");
 942                 return -EINVAL;
 943         }
 944
 945         /* Configure subdevice timings, if any */
 946         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
 947         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
 948                 ret = 0;
 949         if (ret < 0) {
 950                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
 951                 return ret;
 952         }
 953
 954         if (!(timings->bt.width && timings->bt.height &&
 955                                 (timings->bt.hbackporch ||
 956                                  timings->bt.hfrontporch ||
 957                                  timings->bt.hsync) &&
 958                                 timings->bt.vfrontporch &&
 959                                 (timings->bt.vbackporch ||
 960                                  timings->bt.vsync))) {
 961                 vpif_dbg(2, debug, "Timings for width, height, "
 962                                 "horizontal back porch, horizontal sync, "
 963                                 "horizontal front porch, vertical back porch, "
 964                                 "vertical sync and vertical back porch "
 965                                 "must be defined\n");
 966                 return -EINVAL;
 967         }
 968
 969         vid_ch->dv_timings = *timings;
 970
 971         /* Configure video port timings */
 972
 973         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
 974         std_info->sav2eav = bt->width;
 975
 976         std_info->l1 = 1;
 977         std_info->l3 = bt->vsync + bt->vbackporch + 1;
 978
 979         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
 980         if (bt->interlaced) {
 981                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
 982                         std_info->l5 = std_info->vsize/2 -
 983                                 (bt->vfrontporch - 1);
 984                         std_info->l7 = std_info->vsize/2 + 1;
 985                         std_info->l9 = std_info->l7 + bt->il_vsync +
 986                                 bt->il_vbackporch + 1;
 987                         std_info->l11 = std_info->vsize -
 988                                 (bt->il_vfrontporch - 1);
 989                 } else {
 990                         vpif_dbg(2, debug, "Required timing values for "
 991                                         "interlaced BT format missing\n");
 992                         return -EINVAL;
 993                 }
 994         } else {
 995                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
 996         }
 997         strncpy(std_info->name, "Custom timings BT656/1120",
 998                         VPIF_MAX_NAME);
 999         std_info->width = bt->width;
1000         std_info->height = bt->height;
1001         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1002         std_info->ycmux_mode = 0;
1003         std_info->capture_format = 0;
1004         std_info->vbi_supported = 0;
1005         std_info->hd_sd = 1;
1006         std_info->stdid = 0;
1007         vid_ch->stdid = 0;
1008
1009         return 0;
1010 }
1011
1012 /**
1013  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1014  * @file: file ptr
1015  * @priv: file handle
1016  * @timings: digital video timings
1017  */
1018 static int vpif_g_dv_timings(struct file *file, void *priv,
1019                 struct v4l2_dv_timings *timings)
1020 {
1021         struct vpif_display_config *config = vpif_dev->platform_data;
1022         struct video_device *vdev = video_devdata(file);
1023         struct channel_obj *ch = video_get_drvdata(vdev);
1024         struct vpif_display_chan_config *chan_cfg;
1025         struct video_obj *vid_ch = &ch->video;
1026         struct v4l2_output output;
1027
1028         if (config->chan_config[ch->channel_id].outputs == NULL)
1029                 goto error;
1030
1031         chan_cfg = &config->chan_config[ch->channel_id];
1032         output = chan_cfg->outputs[ch->output_idx].output;
1033
1034         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
1035                 goto error;
1036
1037         *timings = vid_ch->dv_timings;
1038
1039         return 0;
1040 error:
1041         return -ENODATA;
1042 }
1043
1044 /*
1045  * vpif_log_status() - Status information
1046  * @file: file ptr
1047  * @priv: file handle
1048  *
1049  * Returns zero.
1050  */
1051 static int vpif_log_status(struct file *filep, void *priv)
1052 {
1053         /* status for sub devices */
1054         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1055
1056         return 0;
1057 }
1058
1059 /* vpif display ioctl operations */
1060 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1061         .vidioc_querycap                = vpif_querycap,
1062         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1063         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1064         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1065         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1066
1067         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1068         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1069         .vidioc_querybuf                = vb2_ioctl_querybuf,
1070         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1071         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1072         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1073         .vidioc_streamon                = vb2_ioctl_streamon,
1074         .vidioc_streamoff               = vb2_ioctl_streamoff,
1075
1076         .vidioc_s_std                   = vpif_s_std,
1077         .vidioc_g_std                   = vpif_g_std,
1078
1079         .vidioc_enum_output             = vpif_enum_output,
1080         .vidioc_s_output                = vpif_s_output,
1081         .vidioc_g_output                = vpif_g_output,
1082
1083         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1084         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1085         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1086
1087         .vidioc_log_status              = vpif_log_status,
1088 };
1089
1090 static const struct v4l2_file_operations vpif_fops = {
1091         .owner          = THIS_MODULE,
1092         .open           = v4l2_fh_open,
1093         .release        = vb2_fop_release,
1094         .unlocked_ioctl = video_ioctl2,
1095         .mmap           = vb2_fop_mmap,
1096         .poll           = vb2_fop_poll
1097 };
1098
1099 /*Configure the channels, buffer sizei, request irq */
1100 static int initialize_vpif(void)
1101 {
1102         int free_channel_objects_index;
1103         int err, i, j;
1104
1105         /* Allocate memory for six channel objects */
1106         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1107                 vpif_obj.dev[i] =
1108                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1109                 /* If memory allocation fails, return error */
1110                 if (!vpif_obj.dev[i]) {
1111                         free_channel_objects_index = i;
1112                         err = -ENOMEM;
1113                         goto vpif_init_free_channel_objects;
1114                 }
1115         }
1116
1117         return 0;
1118
1119 vpif_init_free_channel_objects:
1120         for (j = 0; j < free_channel_objects_index; j++)
1121                 kfree(vpif_obj.dev[j]);
1122         return err;
1123 }
1124
1125 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1126                             struct v4l2_subdev *subdev,
1127                             struct v4l2_async_subdev *asd)
1128 {
1129         int i;
1130
1131         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1132                 if (!strcmp(vpif_obj.config->subdevinfo[i].name,
1133                             subdev->name)) {
1134                         vpif_obj.sd[i] = subdev;
1135                         vpif_obj.sd[i]->grp_id = 1 << i;
1136                         return 0;
1137                 }
1138
1139         return -EINVAL;
1140 }
1141
1142 static int vpif_probe_complete(void)
1143 {
1144         struct common_obj *common;
1145         struct video_device *vdev;
1146         struct channel_obj *ch;
1147         struct vb2_queue *q;
1148         int j, err, k;
1149
1150         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1151                 ch = vpif_obj.dev[j];
1152                 /* Initialize field of the channel objects */
1153                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1154                         common = &ch->common[k];
1155                         spin_lock_init(&common->irqlock);
1156                         mutex_init(&common->lock);
1157                         common->set_addr = NULL;
1158                         common->ytop_off = 0;
1159                         common->ybtm_off = 0;
1160                         common->ctop_off = 0;
1161                         common->cbtm_off = 0;
1162                         common->cur_frm = NULL;
1163                         common->next_frm = NULL;
1164                         memset(&common->fmt, 0, sizeof(common->fmt));
1165                 }
1166                 ch->initialized = 0;
1167                 if (vpif_obj.config->subdev_count)
1168                         ch->sd = vpif_obj.sd[0];
1169                 ch->channel_id = j;
1170
1171                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1172
1173                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1174                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1175
1176                 /* select output 0 */
1177                 err = vpif_set_output(vpif_obj.config, ch, 0);
1178                 if (err)
1179                         goto probe_out;
1180
1181                 /* set initial format */
1182                 ch->video.stdid = V4L2_STD_525_60;
1183                 memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1184                 vpif_update_resolution(ch);
1185
1186                 /* Initialize vb2 queue */
1187                 q = &common->buffer_queue;
1188                 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1189                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1190                 q->drv_priv = ch;
1191                 q->ops = &video_qops;
1192                 q->mem_ops = &vb2_dma_contig_memops;
1193                 q->buf_struct_size = sizeof(struct vpif_disp_buffer);
1194                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1195                 q->min_buffers_needed = 1;
1196                 q->lock = &common->lock;
1197                 err = vb2_queue_init(q);
1198                 if (err) {
1199                         vpif_err("vpif_display: vb2_queue_init() failed\n");
1200                         goto probe_out;
1201                 }
1202
1203                 common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1204                 if (IS_ERR(common->alloc_ctx)) {
1205                         vpif_err("Failed to get the context\n");
1206                         err = PTR_ERR(common->alloc_ctx);
1207                         goto probe_out;
1208                 }
1209
1210                 INIT_LIST_HEAD(&common->dma_queue);
1211
1212                 /* register video device */
1213                 vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
1214                          (int)ch, (int)&ch->video_dev);
1215
1216                 /* Initialize the video_device structure */
1217                 vdev = ch->video_dev;
1218                 strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
1219                 vdev->release = video_device_release;
1220                 vdev->fops = &vpif_fops;
1221                 vdev->ioctl_ops = &vpif_ioctl_ops;
1222                 vdev->v4l2_dev = &vpif_obj.v4l2_dev;
1223                 vdev->vfl_dir = VFL_DIR_TX;
1224                 vdev->queue = q;
1225                 vdev->lock = &common->lock;
1226                 set_bit(V4L2_FL_USE_FH_PRIO, &vdev->flags);
1227                 video_set_drvdata(ch->video_dev, ch);
1228                 err = video_register_device(vdev, VFL_TYPE_GRABBER,
1229                                             (j ? 3 : 2));
1230                 if (err < 0)
1231                         goto probe_out;
1232         }
1233
1234         return 0;
1235
1236 probe_out:
1237         for (k = 0; k < j; k++) {
1238                 ch = vpif_obj.dev[k];
1239                 common = &ch->common[k];
1240                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1241                 video_unregister_device(ch->video_dev);
1242                 video_device_release(ch->video_dev);
1243                 ch->video_dev = NULL;
1244         }
1245         return err;
1246 }
1247
1248 static int vpif_async_complete(struct v4l2_async_notifier *notifier)
1249 {
1250         return vpif_probe_complete();
1251 }
1252
1253 /*
1254  * vpif_probe: This function creates device entries by register itself to the
1255  * V4L2 driver and initializes fields of each channel objects
1256  */
1257 static __init int vpif_probe(struct platform_device *pdev)
1258 {
1259         struct vpif_subdev_info *subdevdata;
1260         int i, j = 0, err = 0;
1261         int res_idx = 0;
1262         struct i2c_adapter *i2c_adap;
1263         struct channel_obj *ch;
1264         struct video_device *vfd;
1265         struct resource *res;
1266         int subdev_count;
1267
1268         vpif_dev = &pdev->dev;
1269         err = initialize_vpif();
1270
1271         if (err) {
1272                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1273                 return err;
1274         }
1275
1276         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1277         if (err) {
1278                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1279                 return err;
1280         }
1281
1282         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1283                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
1284                                         IRQF_SHARED, VPIF_DRIVER_NAME,
1285                                         (void *)(&vpif_obj.dev[res_idx]->
1286                                         channel_id));
1287                 if (err) {
1288                         err = -EINVAL;
1289                         vpif_err("VPIF IRQ request failed\n");
1290                         goto vpif_unregister;
1291                 }
1292                 res_idx++;
1293         }
1294
1295         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1296                 /* Get the pointer to the channel object */
1297                 ch = vpif_obj.dev[i];
1298
1299                 /* Allocate memory for video device */
1300                 vfd = video_device_alloc();
1301                 if (vfd == NULL) {
1302                         for (j = 0; j < i; j++) {
1303                                 ch = vpif_obj.dev[j];
1304                                 video_device_release(ch->video_dev);
1305                         }
1306                         err = -ENOMEM;
1307                         goto vpif_unregister;
1308                 }
1309
1310                 /* Set video_dev to the video device */
1311                 ch->video_dev = vfd;
1312         }
1313
1314         vpif_obj.config = pdev->dev.platform_data;
1315         subdev_count = vpif_obj.config->subdev_count;
1316         subdevdata = vpif_obj.config->subdevinfo;
1317         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1318                                                                 GFP_KERNEL);
1319         if (vpif_obj.sd == NULL) {
1320                 vpif_err("unable to allocate memory for subdevice pointers\n");
1321                 err = -ENOMEM;
1322                 goto vpif_sd_error;
1323         }
1324
1325         if (!vpif_obj.config->asd_sizes) {
1326                 i2c_adap = i2c_get_adapter(1);
1327                 for (i = 0; i < subdev_count; i++) {
1328                         vpif_obj.sd[i] =
1329                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1330                                                           i2c_adap,
1331                                                           &subdevdata[i].
1332                                                           board_info,
1333                                                           NULL);
1334                         if (!vpif_obj.sd[i]) {
1335                                 vpif_err("Error registering v4l2 subdevice\n");
1336                                 err = -ENODEV;
1337                                 goto probe_subdev_out;
1338                         }
1339
1340                         if (vpif_obj.sd[i])
1341                                 vpif_obj.sd[i]->grp_id = 1 << i;
1342                 }
1343                 vpif_probe_complete();
1344         } else {
1345                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
1346                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
1347                 vpif_obj.notifier.bound = vpif_async_bound;
1348                 vpif_obj.notifier.complete = vpif_async_complete;
1349                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
1350                                                    &vpif_obj.notifier);
1351                 if (err) {
1352                         vpif_err("Error registering async notifier\n");
1353                         err = -EINVAL;
1354                         goto probe_subdev_out;
1355                 }
1356         }
1357
1358         return 0;
1359
1360 probe_subdev_out:
1361         kfree(vpif_obj.sd);
1362 vpif_sd_error:
1363         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1364                 ch = vpif_obj.dev[i];
1365                 /* Note: does nothing if ch->video_dev == NULL */
1366                 video_device_release(ch->video_dev);
1367         }
1368 vpif_unregister:
1369         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1370
1371         return err;
1372 }
1373
1374 /*
1375  * vpif_remove: It un-register channels from V4L2 driver
1376  */
1377 static int vpif_remove(struct platform_device *device)
1378 {
1379         struct common_obj *common;
1380         struct channel_obj *ch;
1381         int i;
1382
1383         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1384
1385         kfree(vpif_obj.sd);
1386         /* un-register device */
1387         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1388                 /* Get the pointer to the channel object */
1389                 ch = vpif_obj.dev[i];
1390                 common = &ch->common[i];
1391                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1392                 /* Unregister video device */
1393                 video_unregister_device(ch->video_dev);
1394
1395                 ch->video_dev = NULL;
1396                 kfree(vpif_obj.dev[i]);
1397         }
1398
1399         return 0;
1400 }
1401
1402 #ifdef CONFIG_PM_SLEEP
1403 static int vpif_suspend(struct device *dev)
1404 {
1405         struct common_obj *common;
1406         struct channel_obj *ch;
1407         int i;
1408
1409         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1410                 /* Get the pointer to the channel object */
1411                 ch = vpif_obj.dev[i];
1412                 common = &ch->common[VPIF_VIDEO_INDEX];
1413
1414                 if (!vb2_is_streaming(&common->buffer_queue))
1415                         continue;
1416
1417                 mutex_lock(&common->lock);
1418                 /* Disable channel */
1419                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1420                         enable_channel2(0);
1421                         channel2_intr_enable(0);
1422                 }
1423                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1424                         ycmux_mode == 2) {
1425                         enable_channel3(0);
1426                         channel3_intr_enable(0);
1427                 }
1428                 mutex_unlock(&common->lock);
1429         }
1430
1431         return 0;
1432 }
1433
1434 static int vpif_resume(struct device *dev)
1435 {
1436
1437         struct common_obj *common;
1438         struct channel_obj *ch;
1439         int i;
1440
1441         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1442                 /* Get the pointer to the channel object */
1443                 ch = vpif_obj.dev[i];
1444                 common = &ch->common[VPIF_VIDEO_INDEX];
1445
1446                 if (!vb2_is_streaming(&common->buffer_queue))
1447                         continue;
1448
1449                 mutex_lock(&common->lock);
1450                 /* Enable channel */
1451                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1452                         enable_channel2(1);
1453                         channel2_intr_enable(1);
1454                 }
1455                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1456                                 ycmux_mode == 2) {
1457                         enable_channel3(1);
1458                         channel3_intr_enable(1);
1459                 }
1460                 mutex_unlock(&common->lock);
1461         }
1462
1463         return 0;
1464 }
1465
1466 #endif
1467
1468 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
1469
1470 static __refdata struct platform_driver vpif_driver = {
1471         .driver = {
1472                         .name   = VPIF_DRIVER_NAME,
1473                         .owner  = THIS_MODULE,
1474                         .pm     = &vpif_pm_ops,
1475         },
1476         .probe  = vpif_probe,
1477         .remove = vpif_remove,
1478 };
1479
1480 module_platform_driver(vpif_driver);