drivers/media/platform/rcar-vin/rcar-v4l2.c

   1 /*
   2  * Driver for Renesas R-Car VIN
   3  *
   4  * Copyright (C) 2016 Renesas Electronics Corp.
   5  * Copyright (C) 2011-2013 Renesas Solutions Corp.
   6  * Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>
   7  * Copyright (C) 2008 Magnus Damm
   8  *
   9  * Based on the soc-camera rcar_vin driver
  10  *
  11  * This program is free software; you can redistribute  it and/or modify it
  12  * under  the terms of  the GNU General  Public License as published by the
  13  * Free Software Foundation;  either version 2 of the  License, or (at your
  14  * option) any later version.
  15  */
  16
  17 #include <linux/pm_runtime.h>
  18
  19 #include <media/v4l2-event.h>
  20 #include <media/v4l2-ioctl.h>
  21 #include <media/v4l2-rect.h>
  22
  23 #include "rcar-vin.h"
  24
  25 #define RVIN_DEFAULT_FORMAT     V4L2_PIX_FMT_YUYV
  26 #define RVIN_MAX_WIDTH          2048
  27 #define RVIN_MAX_HEIGHT         2048
  28
  29 /* -----------------------------------------------------------------------------
  30  * Format Conversions
  31  */
  32
  33 static const struct rvin_video_format rvin_formats[] = {
  34         {
  35                 .fourcc                 = V4L2_PIX_FMT_NV16,
  36                 .bpp                    = 1,
  37         },
  38         {
  39                 .fourcc                 = V4L2_PIX_FMT_YUYV,
  40                 .bpp                    = 2,
  41         },
  42         {
  43                 .fourcc                 = V4L2_PIX_FMT_UYVY,
  44                 .bpp                    = 2,
  45         },
  46         {
  47                 .fourcc                 = V4L2_PIX_FMT_RGB565,
  48                 .bpp                    = 2,
  49         },
  50         {
  51                 .fourcc                 = V4L2_PIX_FMT_XRGB555,
  52                 .bpp                    = 2,
  53         },
  54         {
  55                 .fourcc                 = V4L2_PIX_FMT_XBGR32,
  56                 .bpp                    = 4,
  57         },
  58 };
  59
  60 const struct rvin_video_format *rvin_format_from_pixel(u32 pixelformat)
  61 {
  62         int i;
  63
  64         for (i = 0; i < ARRAY_SIZE(rvin_formats); i++)
  65                 if (rvin_formats[i].fourcc == pixelformat)
  66                         return rvin_formats + i;
  67
  68         return NULL;
  69 }
  70
  71 static u32 rvin_format_bytesperline(struct v4l2_pix_format *pix)
  72 {
  73         const struct rvin_video_format *fmt;
  74
  75         fmt = rvin_format_from_pixel(pix->pixelformat);
  76
  77         if (WARN_ON(!fmt))
  78                 return -EINVAL;
  79
  80         return pix->width * fmt->bpp;
  81 }
  82
  83 static u32 rvin_format_sizeimage(struct v4l2_pix_format *pix)
  84 {
  85         if (pix->pixelformat == V4L2_PIX_FMT_NV16)
  86                 return pix->bytesperline * pix->height * 2;
  87
  88         return pix->bytesperline * pix->height;
  89 }
  90
  91 /* -----------------------------------------------------------------------------
  92  * V4L2
  93  */
  94
  95 static void rvin_reset_crop_compose(struct rvin_dev *vin)
  96 {
  97         vin->crop.top = vin->crop.left = 0;
  98         vin->crop.width = vin->source.width;
  99         vin->crop.height = vin->source.height;
 100
 101         vin->compose.top = vin->compose.left = 0;
 102         vin->compose.width = vin->format.width;
 103         vin->compose.height = vin->format.height;
 104 }
 105
 106 static int rvin_reset_format(struct rvin_dev *vin)
 107 {
 108         struct v4l2_subdev_format fmt = {
 109                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 110         };
 111         struct v4l2_mbus_framefmt *mf = &fmt.format;
 112         int ret;
 113
 114         fmt.pad = vin->digital.source_pad;
 115
 116         ret = v4l2_subdev_call(vin_to_source(vin), pad, get_fmt, NULL, &fmt);
 117         if (ret)
 118                 return ret;
 119
 120         vin->format.width       = mf->width;
 121         vin->format.height      = mf->height;
 122         vin->format.colorspace  = mf->colorspace;
 123         vin->format.field       = mf->field;
 124
 125         /*
 126          * If the subdevice uses ALTERNATE field mode and G_STD is
 127          * implemented use the VIN HW to combine the two fields to
 128          * one INTERLACED frame. The ALTERNATE field mode can still
 129          * be requested in S_FMT and be respected, this is just the
 130          * default which is applied at probing or when S_STD is called.
 131          */
 132         if (vin->format.field == V4L2_FIELD_ALTERNATE &&
 133             v4l2_subdev_has_op(vin_to_source(vin), video, g_std))
 134                 vin->format.field = V4L2_FIELD_INTERLACED;
 135
 136         switch (vin->format.field) {
 137         case V4L2_FIELD_TOP:
 138         case V4L2_FIELD_BOTTOM:
 139         case V4L2_FIELD_ALTERNATE:
 140                 vin->format.height /= 2;
 141                 break;
 142         case V4L2_FIELD_NONE:
 143         case V4L2_FIELD_INTERLACED_TB:
 144         case V4L2_FIELD_INTERLACED_BT:
 145         case V4L2_FIELD_INTERLACED:
 146                 break;
 147         default:
 148                 vin->format.field = V4L2_FIELD_NONE;
 149                 break;
 150         }
 151
 152         rvin_reset_crop_compose(vin);
 153
 154         vin->format.bytesperline = rvin_format_bytesperline(&vin->format);
 155         vin->format.sizeimage = rvin_format_sizeimage(&vin->format);
 156
 157         return 0;
 158 }
 159
 160 static int __rvin_try_format_source(struct rvin_dev *vin,
 161                                     u32 which,
 162                                     struct v4l2_pix_format *pix,
 163                                     struct rvin_source_fmt *source)
 164 {
 165         struct v4l2_subdev *sd;
 166         struct v4l2_subdev_pad_config *pad_cfg;
 167         struct v4l2_subdev_format format = {
 168                 .which = which,
 169         };
 170         enum v4l2_field field;
 171         int ret;
 172
 173         sd = vin_to_source(vin);
 174
 175         v4l2_fill_mbus_format(&format.format, pix, vin->digital.code);
 176
 177         pad_cfg = v4l2_subdev_alloc_pad_config(sd);
 178         if (pad_cfg == NULL)
 179                 return -ENOMEM;
 180
 181         format.pad = vin->digital.source_pad;
 182
 183         field = pix->field;
 184
 185         ret = v4l2_subdev_call(sd, pad, set_fmt, pad_cfg, &format);
 186         if (ret < 0 && ret != -ENOIOCTLCMD)
 187                 goto done;
 188
 189         v4l2_fill_pix_format(pix, &format.format);
 190
 191         pix->field = field;
 192
 193         source->width = pix->width;
 194         source->height = pix->height;
 195
 196         vin_dbg(vin, "Source resolution: %ux%u\n", source->width,
 197                 source->height);
 198
 199 done:
 200         v4l2_subdev_free_pad_config(pad_cfg);
 201         return ret;
 202 }
 203
 204 static int __rvin_try_format(struct rvin_dev *vin,
 205                              u32 which,
 206                              struct v4l2_pix_format *pix,
 207                              struct rvin_source_fmt *source)
 208 {
 209         u32 rwidth, rheight, walign;
 210         int ret;
 211
 212         /* Requested */
 213         rwidth = pix->width;
 214         rheight = pix->height;
 215
 216         /* Keep current field if no specific one is asked for */
 217         if (pix->field == V4L2_FIELD_ANY)
 218                 pix->field = vin->format.field;
 219
 220         /* If requested format is not supported fallback to the default */
 221         if (!rvin_format_from_pixel(pix->pixelformat)) {
 222                 vin_dbg(vin, "Format 0x%x not found, using default 0x%x\n",
 223                         pix->pixelformat, RVIN_DEFAULT_FORMAT);
 224                 pix->pixelformat = RVIN_DEFAULT_FORMAT;
 225         }
 226
 227         /* Always recalculate */
 228         pix->bytesperline = 0;
 229         pix->sizeimage = 0;
 230
 231         /* Limit to source capabilities */
 232         ret = __rvin_try_format_source(vin, which, pix, source);
 233         if (ret)
 234                 return ret;
 235
 236         switch (pix->field) {
 237         case V4L2_FIELD_TOP:
 238         case V4L2_FIELD_BOTTOM:
 239         case V4L2_FIELD_ALTERNATE:
 240                 pix->height /= 2;
 241                 source->height /= 2;
 242                 break;
 243         case V4L2_FIELD_NONE:
 244         case V4L2_FIELD_INTERLACED_TB:
 245         case V4L2_FIELD_INTERLACED_BT:
 246         case V4L2_FIELD_INTERLACED:
 247                 break;
 248         default:
 249                 pix->field = V4L2_FIELD_NONE;
 250                 break;
 251         }
 252
 253         /* If source can't match format try if VIN can scale */
 254         if (source->width != rwidth || source->height != rheight)
 255                 rvin_scale_try(vin, pix, rwidth, rheight);
 256
 257         /* HW limit width to a multiple of 32 (2^5) for NV16 else 2 (2^1) */
 258         walign = vin->format.pixelformat == V4L2_PIX_FMT_NV16 ? 5 : 1;
 259
 260         /* Limit to VIN capabilities */
 261         v4l_bound_align_image(&pix->width, 2, RVIN_MAX_WIDTH, walign,
 262                               &pix->height, 4, RVIN_MAX_HEIGHT, 2, 0);
 263
 264         pix->bytesperline = max_t(u32, pix->bytesperline,
 265                                   rvin_format_bytesperline(pix));
 266         pix->sizeimage = max_t(u32, pix->sizeimage,
 267                                rvin_format_sizeimage(pix));
 268
 269         if (vin->chip == RCAR_M1 && pix->pixelformat == V4L2_PIX_FMT_XBGR32) {
 270                 vin_err(vin, "pixel format XBGR32 not supported on M1\n");
 271                 return -EINVAL;
 272         }
 273
 274         vin_dbg(vin, "Requested %ux%u Got %ux%u bpl: %d size: %d\n",
 275                 rwidth, rheight, pix->width, pix->height,
 276                 pix->bytesperline, pix->sizeimage);
 277
 278         return 0;
 279 }
 280
 281 static int rvin_querycap(struct file *file, void *priv,
 282                          struct v4l2_capability *cap)
 283 {
 284         struct rvin_dev *vin = video_drvdata(file);
 285
 286         strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 287         strlcpy(cap->card, "R_Car_VIN", sizeof(cap->card));
 288         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 289                  dev_name(vin->dev));
 290         return 0;
 291 }
 292
 293 static int rvin_try_fmt_vid_cap(struct file *file, void *priv,
 294                                 struct v4l2_format *f)
 295 {
 296         struct rvin_dev *vin = video_drvdata(file);
 297         struct rvin_source_fmt source;
 298
 299         return __rvin_try_format(vin, V4L2_SUBDEV_FORMAT_TRY, &f->fmt.pix,
 300                                  &source);
 301 }
 302
 303 static int rvin_s_fmt_vid_cap(struct file *file, void *priv,
 304                               struct v4l2_format *f)
 305 {
 306         struct rvin_dev *vin = video_drvdata(file);
 307         struct rvin_source_fmt source;
 308         int ret;
 309
 310         if (vb2_is_busy(&vin->queue))
 311                 return -EBUSY;
 312
 313         ret = __rvin_try_format(vin, V4L2_SUBDEV_FORMAT_ACTIVE, &f->fmt.pix,
 314                                 &source);
 315         if (ret)
 316                 return ret;
 317
 318         vin->source.width = source.width;
 319         vin->source.height = source.height;
 320
 321         vin->format = f->fmt.pix;
 322
 323         rvin_reset_crop_compose(vin);
 324
 325         return 0;
 326 }
 327
 328 static int rvin_g_fmt_vid_cap(struct file *file, void *priv,
 329                               struct v4l2_format *f)
 330 {
 331         struct rvin_dev *vin = video_drvdata(file);
 332
 333         f->fmt.pix = vin->format;
 334
 335         return 0;
 336 }
 337
 338 static int rvin_enum_fmt_vid_cap(struct file *file, void *priv,
 339                                  struct v4l2_fmtdesc *f)
 340 {
 341         if (f->index >= ARRAY_SIZE(rvin_formats))
 342                 return -EINVAL;
 343
 344         f->pixelformat = rvin_formats[f->index].fourcc;
 345
 346         return 0;
 347 }
 348
 349 static int rvin_g_selection(struct file *file, void *fh,
 350                             struct v4l2_selection *s)
 351 {
 352         struct rvin_dev *vin = video_drvdata(file);
 353
 354         if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 355                 return -EINVAL;
 356
 357         switch (s->target) {
 358         case V4L2_SEL_TGT_CROP_BOUNDS:
 359         case V4L2_SEL_TGT_CROP_DEFAULT:
 360                 s->r.left = s->r.top = 0;
 361                 s->r.width = vin->source.width;
 362                 s->r.height = vin->source.height;
 363                 break;
 364         case V4L2_SEL_TGT_CROP:
 365                 s->r = vin->crop;
 366                 break;
 367         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 368         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 369                 s->r.left = s->r.top = 0;
 370                 s->r.width = vin->format.width;
 371                 s->r.height = vin->format.height;
 372                 break;
 373         case V4L2_SEL_TGT_COMPOSE:
 374                 s->r = vin->compose;
 375                 break;
 376         default:
 377                 return -EINVAL;
 378         }
 379
 380         return 0;
 381 }
 382
 383 static int rvin_s_selection(struct file *file, void *fh,
 384                             struct v4l2_selection *s)
 385 {
 386         struct rvin_dev *vin = video_drvdata(file);
 387         const struct rvin_video_format *fmt;
 388         struct v4l2_rect r = s->r;
 389         struct v4l2_rect max_rect;
 390         struct v4l2_rect min_rect = {
 391                 .width = 6,
 392                 .height = 2,
 393         };
 394
 395         if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 396                 return -EINVAL;
 397
 398         v4l2_rect_set_min_size(&r, &min_rect);
 399
 400         switch (s->target) {
 401         case V4L2_SEL_TGT_CROP:
 402                 /* Can't crop outside of source input */
 403                 max_rect.top = max_rect.left = 0;
 404                 max_rect.width = vin->source.width;
 405                 max_rect.height = vin->source.height;
 406                 v4l2_rect_map_inside(&r, &max_rect);
 407
 408                 v4l_bound_align_image(&r.width, 2, vin->source.width, 1,
 409                                       &r.height, 4, vin->source.height, 2, 0);
 410
 411                 r.top  = clamp_t(s32, r.top, 0, vin->source.height - r.height);
 412                 r.left = clamp_t(s32, r.left, 0, vin->source.width - r.width);
 413
 414                 vin->crop = s->r = r;
 415
 416                 vin_dbg(vin, "Cropped %dx%d@%d:%d of %dx%d\n",
 417                         r.width, r.height, r.left, r.top,
 418                         vin->source.width, vin->source.height);
 419                 break;
 420         case V4L2_SEL_TGT_COMPOSE:
 421                 /* Make sure compose rect fits inside output format */
 422                 max_rect.top = max_rect.left = 0;
 423                 max_rect.width = vin->format.width;
 424                 max_rect.height = vin->format.height;
 425                 v4l2_rect_map_inside(&r, &max_rect);
 426
 427                 /*
 428                  * Composing is done by adding a offset to the buffer address,
 429                  * the HW wants this address to be aligned to HW_BUFFER_MASK.
 430                  * Make sure the top and left values meets this requirement.
 431                  */
 432                 while ((r.top * vin->format.bytesperline) & HW_BUFFER_MASK)
 433                         r.top--;
 434
 435                 fmt = rvin_format_from_pixel(vin->format.pixelformat);
 436                 while ((r.left * fmt->bpp) & HW_BUFFER_MASK)
 437                         r.left--;
 438
 439                 vin->compose = s->r = r;
 440
 441                 vin_dbg(vin, "Compose %dx%d@%d:%d in %dx%d\n",
 442                         r.width, r.height, r.left, r.top,
 443                         vin->format.width, vin->format.height);
 444                 break;
 445         default:
 446                 return -EINVAL;
 447         }
 448
 449         /* HW supports modifying configuration while running */
 450         rvin_crop_scale_comp(vin);
 451
 452         return 0;
 453 }
 454
 455 static int rvin_cropcap(struct file *file, void *priv,
 456                         struct v4l2_cropcap *crop)
 457 {
 458         struct rvin_dev *vin = video_drvdata(file);
 459         struct v4l2_subdev *sd = vin_to_source(vin);
 460
 461         if (crop->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 462                 return -EINVAL;
 463
 464         return v4l2_subdev_call(sd, video, g_pixelaspect, &crop->pixelaspect);
 465 }
 466
 467 static int rvin_enum_input(struct file *file, void *priv,
 468                            struct v4l2_input *i)
 469 {
 470         struct rvin_dev *vin = video_drvdata(file);
 471         struct v4l2_subdev *sd = vin_to_source(vin);
 472         int ret;
 473
 474         if (i->index != 0)
 475                 return -EINVAL;
 476
 477         ret = v4l2_subdev_call(sd, video, g_input_status, &i->status);
 478         if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
 479                 return ret;
 480
 481         i->type = V4L2_INPUT_TYPE_CAMERA;
 482
 483         if (v4l2_subdev_has_op(sd, pad, dv_timings_cap)) {
 484                 i->capabilities = V4L2_IN_CAP_DV_TIMINGS;
 485                 i->std = 0;
 486         } else {
 487                 i->capabilities = V4L2_IN_CAP_STD;
 488                 i->std = vin->vdev.tvnorms;
 489         }
 490
 491         strlcpy(i->name, "Camera", sizeof(i->name));
 492
 493         return 0;
 494 }
 495
 496 static int rvin_g_input(struct file *file, void *priv, unsigned int *i)
 497 {
 498         *i = 0;
 499         return 0;
 500 }
 501
 502 static int rvin_s_input(struct file *file, void *priv, unsigned int i)
 503 {
 504         if (i > 0)
 505                 return -EINVAL;
 506         return 0;
 507 }
 508
 509 static int rvin_querystd(struct file *file, void *priv, v4l2_std_id *a)
 510 {
 511         struct rvin_dev *vin = video_drvdata(file);
 512         struct v4l2_subdev *sd = vin_to_source(vin);
 513
 514         return v4l2_subdev_call(sd, video, querystd, a);
 515 }
 516
 517 static int rvin_s_std(struct file *file, void *priv, v4l2_std_id a)
 518 {
 519         struct rvin_dev *vin = video_drvdata(file);
 520         int ret;
 521
 522         ret = v4l2_subdev_call(vin_to_source(vin), video, s_std, a);
 523         if (ret < 0)
 524                 return ret;
 525
 526         /* Changing the standard will change the width/height */
 527         return rvin_reset_format(vin);
 528 }
 529
 530 static int rvin_g_std(struct file *file, void *priv, v4l2_std_id *a)
 531 {
 532         struct rvin_dev *vin = video_drvdata(file);
 533         struct v4l2_subdev *sd = vin_to_source(vin);
 534
 535         return v4l2_subdev_call(sd, video, g_std, a);
 536 }
 537
 538 static int rvin_subscribe_event(struct v4l2_fh *fh,
 539                                 const struct v4l2_event_subscription *sub)
 540 {
 541         switch (sub->type) {
 542         case V4L2_EVENT_SOURCE_CHANGE:
 543                 return v4l2_event_subscribe(fh, sub, 4, NULL);
 544         }
 545         return v4l2_ctrl_subscribe_event(fh, sub);
 546 }
 547
 548 static int rvin_enum_dv_timings(struct file *file, void *priv_fh,
 549                                 struct v4l2_enum_dv_timings *timings)
 550 {
 551         struct rvin_dev *vin = video_drvdata(file);
 552         struct v4l2_subdev *sd = vin_to_source(vin);
 553         int ret;
 554
 555         if (timings->pad)
 556                 return -EINVAL;
 557
 558         timings->pad = vin->digital.sink_pad;
 559
 560         ret = v4l2_subdev_call(sd, pad, enum_dv_timings, timings);
 561
 562         timings->pad = 0;
 563
 564         return ret;
 565 }
 566
 567 static int rvin_s_dv_timings(struct file *file, void *priv_fh,
 568                              struct v4l2_dv_timings *timings)
 569 {
 570         struct rvin_dev *vin = video_drvdata(file);
 571         struct v4l2_subdev *sd = vin_to_source(vin);
 572         int ret;
 573
 574         ret = v4l2_subdev_call(sd, video, s_dv_timings, timings);
 575         if (ret)
 576                 return ret;
 577
 578         /* Changing the timings will change the width/height */
 579         return rvin_reset_format(vin);
 580 }
 581
 582 static int rvin_g_dv_timings(struct file *file, void *priv_fh,
 583                              struct v4l2_dv_timings *timings)
 584 {
 585         struct rvin_dev *vin = video_drvdata(file);
 586         struct v4l2_subdev *sd = vin_to_source(vin);
 587
 588         return v4l2_subdev_call(sd, video, g_dv_timings, timings);
 589 }
 590
 591 static int rvin_query_dv_timings(struct file *file, void *priv_fh,
 592                                  struct v4l2_dv_timings *timings)
 593 {
 594         struct rvin_dev *vin = video_drvdata(file);
 595         struct v4l2_subdev *sd = vin_to_source(vin);
 596
 597         return v4l2_subdev_call(sd, video, query_dv_timings, timings);
 598 }
 599
 600 static int rvin_dv_timings_cap(struct file *file, void *priv_fh,
 601                                struct v4l2_dv_timings_cap *cap)
 602 {
 603         struct rvin_dev *vin = video_drvdata(file);
 604         struct v4l2_subdev *sd = vin_to_source(vin);
 605         int ret;
 606
 607         if (cap->pad)
 608                 return -EINVAL;
 609
 610         cap->pad = vin->digital.sink_pad;
 611
 612         ret = v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
 613
 614         cap->pad = 0;
 615
 616         return ret;
 617 }
 618
 619 static int rvin_g_edid(struct file *file, void *fh, struct v4l2_edid *edid)
 620 {
 621         struct rvin_dev *vin = video_drvdata(file);
 622         struct v4l2_subdev *sd = vin_to_source(vin);
 623         int ret;
 624
 625         if (edid->pad)
 626                 return -EINVAL;
 627
 628         edid->pad = vin->digital.sink_pad;
 629
 630         ret = v4l2_subdev_call(sd, pad, get_edid, edid);
 631
 632         edid->pad = 0;
 633
 634         return ret;
 635 }
 636
 637 static int rvin_s_edid(struct file *file, void *fh, struct v4l2_edid *edid)
 638 {
 639         struct rvin_dev *vin = video_drvdata(file);
 640         struct v4l2_subdev *sd = vin_to_source(vin);
 641         int ret;
 642
 643         if (edid->pad)
 644                 return -EINVAL;
 645
 646         edid->pad = vin->digital.sink_pad;
 647
 648         ret = v4l2_subdev_call(sd, pad, set_edid, edid);
 649
 650         edid->pad = 0;
 651
 652         return ret;
 653 }
 654
 655 static const struct v4l2_ioctl_ops rvin_ioctl_ops = {
 656         .vidioc_querycap                = rvin_querycap,
 657         .vidioc_try_fmt_vid_cap         = rvin_try_fmt_vid_cap,
 658         .vidioc_g_fmt_vid_cap           = rvin_g_fmt_vid_cap,
 659         .vidioc_s_fmt_vid_cap           = rvin_s_fmt_vid_cap,
 660         .vidioc_enum_fmt_vid_cap        = rvin_enum_fmt_vid_cap,
 661
 662         .vidioc_g_selection             = rvin_g_selection,
 663         .vidioc_s_selection             = rvin_s_selection,
 664
 665         .vidioc_cropcap                 = rvin_cropcap,
 666
 667         .vidioc_enum_input              = rvin_enum_input,
 668         .vidioc_g_input                 = rvin_g_input,
 669         .vidioc_s_input                 = rvin_s_input,
 670
 671         .vidioc_dv_timings_cap          = rvin_dv_timings_cap,
 672         .vidioc_enum_dv_timings         = rvin_enum_dv_timings,
 673         .vidioc_g_dv_timings            = rvin_g_dv_timings,
 674         .vidioc_s_dv_timings            = rvin_s_dv_timings,
 675         .vidioc_query_dv_timings        = rvin_query_dv_timings,
 676
 677         .vidioc_g_edid                  = rvin_g_edid,
 678         .vidioc_s_edid                  = rvin_s_edid,
 679
 680         .vidioc_querystd                = rvin_querystd,
 681         .vidioc_g_std                   = rvin_g_std,
 682         .vidioc_s_std                   = rvin_s_std,
 683
 684         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 685         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 686         .vidioc_querybuf                = vb2_ioctl_querybuf,
 687         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 688         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 689         .vidioc_expbuf                  = vb2_ioctl_expbuf,
 690         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 691         .vidioc_streamon                = vb2_ioctl_streamon,
 692         .vidioc_streamoff               = vb2_ioctl_streamoff,
 693
 694         .vidioc_log_status              = v4l2_ctrl_log_status,
 695         .vidioc_subscribe_event         = rvin_subscribe_event,
 696         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 697 };
 698
 699 /* -----------------------------------------------------------------------------
 700  * File Operations
 701  */
 702
 703 static int rvin_power_on(struct rvin_dev *vin)
 704 {
 705         int ret;
 706         struct v4l2_subdev *sd = vin_to_source(vin);
 707
 708         pm_runtime_get_sync(vin->v4l2_dev.dev);
 709
 710         ret = v4l2_subdev_call(sd, core, s_power, 1);
 711         if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
 712                 return ret;
 713         return 0;
 714 }
 715
 716 static int rvin_power_off(struct rvin_dev *vin)
 717 {
 718         int ret;
 719         struct v4l2_subdev *sd = vin_to_source(vin);
 720
 721         ret = v4l2_subdev_call(sd, core, s_power, 0);
 722
 723         pm_runtime_put(vin->v4l2_dev.dev);
 724
 725         if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
 726                 return ret;
 727
 728         return 0;
 729 }
 730
 731 static int rvin_initialize_device(struct file *file)
 732 {
 733         struct rvin_dev *vin = video_drvdata(file);
 734         int ret;
 735
 736         struct v4l2_format f = {
 737                 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 738                 .fmt.pix = {
 739                         .width          = vin->format.width,
 740                         .height         = vin->format.height,
 741                         .field          = vin->format.field,
 742                         .colorspace     = vin->format.colorspace,
 743                         .pixelformat    = vin->format.pixelformat,
 744                 },
 745         };
 746
 747         ret = rvin_power_on(vin);
 748         if (ret < 0)
 749                 return ret;
 750
 751         pm_runtime_enable(&vin->vdev.dev);
 752         ret = pm_runtime_resume(&vin->vdev.dev);
 753         if (ret < 0 && ret != -ENOSYS)
 754                 goto eresume;
 755
 756         /*
 757          * Try to configure with default parameters. Notice: this is the
 758          * very first open, so, we cannot race against other calls,
 759          * apart from someone else calling open() simultaneously, but
 760          * .host_lock is protecting us against it.
 761          */
 762         ret = rvin_s_fmt_vid_cap(file, NULL, &f);
 763         if (ret < 0)
 764                 goto esfmt;
 765
 766         v4l2_ctrl_handler_setup(&vin->ctrl_handler);
 767
 768         return 0;
 769 esfmt:
 770         pm_runtime_disable(&vin->vdev.dev);
 771 eresume:
 772         rvin_power_off(vin);
 773
 774         return ret;
 775 }
 776
 777 static int rvin_open(struct file *file)
 778 {
 779         struct rvin_dev *vin = video_drvdata(file);
 780         int ret;
 781
 782         mutex_lock(&vin->lock);
 783
 784         file->private_data = vin;
 785
 786         ret = v4l2_fh_open(file);
 787         if (ret)
 788                 goto unlock;
 789
 790         if (!v4l2_fh_is_singular_file(file))
 791                 goto unlock;
 792
 793         if (rvin_initialize_device(file)) {
 794                 v4l2_fh_release(file);
 795                 ret = -ENODEV;
 796         }
 797
 798 unlock:
 799         mutex_unlock(&vin->lock);
 800         return ret;
 801 }
 802
 803 static int rvin_release(struct file *file)
 804 {
 805         struct rvin_dev *vin = video_drvdata(file);
 806         bool fh_singular;
 807         int ret;
 808
 809         mutex_lock(&vin->lock);
 810
 811         /* Save the singular status before we call the clean-up helper */
 812         fh_singular = v4l2_fh_is_singular_file(file);
 813
 814         /* the release helper will cleanup any on-going streaming */
 815         ret = _vb2_fop_release(file, NULL);
 816
 817         /*
 818          * If this was the last open file.
 819          * Then de-initialize hw module.
 820          */
 821         if (fh_singular) {
 822                 pm_runtime_suspend(&vin->vdev.dev);
 823                 pm_runtime_disable(&vin->vdev.dev);
 824                 rvin_power_off(vin);
 825         }
 826
 827         mutex_unlock(&vin->lock);
 828
 829         return ret;
 830 }
 831
 832 static const struct v4l2_file_operations rvin_fops = {
 833         .owner          = THIS_MODULE,
 834         .unlocked_ioctl = video_ioctl2,
 835         .open           = rvin_open,
 836         .release        = rvin_release,
 837         .poll           = vb2_fop_poll,
 838         .mmap           = vb2_fop_mmap,
 839         .read           = vb2_fop_read,
 840 };
 841
 842 void rvin_v4l2_remove(struct rvin_dev *vin)
 843 {
 844         v4l2_info(&vin->v4l2_dev, "Removing %s\n",
 845                   video_device_node_name(&vin->vdev));
 846
 847         /* Checks internaly if handlers have been init or not */
 848         v4l2_ctrl_handler_free(&vin->ctrl_handler);
 849
 850         /* Checks internaly if vdev have been init or not */
 851         video_unregister_device(&vin->vdev);
 852 }
 853
 854 static void rvin_notify(struct v4l2_subdev *sd,
 855                         unsigned int notification, void *arg)
 856 {
 857         struct rvin_dev *vin =
 858                 container_of(sd->v4l2_dev, struct rvin_dev, v4l2_dev);
 859
 860         switch (notification) {
 861         case V4L2_DEVICE_NOTIFY_EVENT:
 862                 v4l2_event_queue(&vin->vdev, arg);
 863                 break;
 864         default:
 865                 break;
 866         }
 867 }
 868
 869 int rvin_v4l2_probe(struct rvin_dev *vin)
 870 {
 871         struct video_device *vdev = &vin->vdev;
 872         struct v4l2_subdev *sd = vin_to_source(vin);
 873         int ret;
 874
 875         v4l2_set_subdev_hostdata(sd, vin);
 876
 877         vin->v4l2_dev.notify = rvin_notify;
 878
 879         ret = v4l2_subdev_call(sd, video, g_tvnorms, &vin->vdev.tvnorms);
 880         if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
 881                 return ret;
 882
 883         if (vin->vdev.tvnorms == 0) {
 884                 /* Disable the STD API if there are no tvnorms defined */
 885                 v4l2_disable_ioctl(&vin->vdev, VIDIOC_G_STD);
 886                 v4l2_disable_ioctl(&vin->vdev, VIDIOC_S_STD);
 887                 v4l2_disable_ioctl(&vin->vdev, VIDIOC_QUERYSTD);
 888                 v4l2_disable_ioctl(&vin->vdev, VIDIOC_ENUMSTD);
 889         }
 890
 891         /* Add the controls */
 892         /*
 893          * Currently the subdev with the largest number of controls (13) is
 894          * ov6550. So let's pick 16 as a hint for the control handler. Note
 895          * that this is a hint only: too large and you waste some memory, too
 896          * small and there is a (very) small performance hit when looking up
 897          * controls in the internal hash.
 898          */
 899         ret = v4l2_ctrl_handler_init(&vin->ctrl_handler, 16);
 900         if (ret < 0)
 901                 return ret;
 902
 903         ret = v4l2_ctrl_add_handler(&vin->ctrl_handler, sd->ctrl_handler, NULL);
 904         if (ret < 0)
 905                 return ret;
 906
 907         /* video node */
 908         vdev->fops = &rvin_fops;
 909         vdev->v4l2_dev = &vin->v4l2_dev;
 910         vdev->queue = &vin->queue;
 911         strlcpy(vdev->name, KBUILD_MODNAME, sizeof(vdev->name));
 912         vdev->release = video_device_release_empty;
 913         vdev->ioctl_ops = &rvin_ioctl_ops;
 914         vdev->lock = &vin->lock;
 915         vdev->ctrl_handler = &vin->ctrl_handler;
 916         vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
 917                 V4L2_CAP_READWRITE;
 918
 919         vin->format.pixelformat = RVIN_DEFAULT_FORMAT;
 920         rvin_reset_format(vin);
 921
 922         ret = video_register_device(&vin->vdev, VFL_TYPE_GRABBER, -1);
 923         if (ret) {
 924                 vin_err(vin, "Failed to register video device\n");
 925                 return ret;
 926         }
 927
 928         video_set_drvdata(&vin->vdev, vin);
 929
 930         v4l2_info(&vin->v4l2_dev, "Device registered as %s\n",
 931                   video_device_node_name(&vin->vdev));
 932
 933         return ret;
 934 }