drivers/staging/media/imx/imx-media-capture.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Video Capture Subdev for Freescale i.MX5/6 SOC
   4  *
   5  * Copyright (c) 2012-2016 Mentor Graphics Inc.
   6  */
   7 #include <linux/delay.h>
   8 #include <linux/fs.h>
   9 #include <linux/module.h>
  10 #include <linux/pinctrl/consumer.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/sched.h>
  13 #include <linux/slab.h>
  14 #include <linux/spinlock.h>
  15 #include <linux/timer.h>
  16 #include <media/v4l2-ctrls.h>
  17 #include <media/v4l2-device.h>
  18 #include <media/v4l2-event.h>
  19 #include <media/v4l2-fwnode.h>
  20 #include <media/v4l2-ioctl.h>
  21 #include <media/v4l2-mc.h>
  22 #include <media/v4l2-subdev.h>
  23 #include <media/videobuf2-dma-contig.h>
  24 #include <video/imx-ipu-v3.h>
  25 #include <media/imx.h>
  26 #include "imx-media.h"
  27
  28 #define IMX_CAPTURE_NAME "imx-capture"
  29
  30 struct capture_priv {
  31         struct imx_media_dev *md;               /* Media device */
  32         struct device *dev;                     /* Physical device */
  33
  34         struct imx_media_video_dev vdev;        /* Video device */
  35         struct media_pad vdev_pad;              /* Video device pad */
  36
  37         struct v4l2_subdev *src_sd;             /* Source subdev */
  38         int src_sd_pad;                         /* Source subdev pad */
  39
  40         struct mutex mutex;                     /* Protect vdev operations */
  41
  42         struct vb2_queue q;                     /* The videobuf2 queue */
  43         struct list_head ready_q;               /* List of queued buffers */
  44         spinlock_t q_lock;                      /* Protect ready_q */
  45
  46         struct v4l2_ctrl_handler ctrl_hdlr;     /* Controls inherited from subdevs */
  47
  48         bool legacy_api;                        /* Use the legacy (pre-MC) API */
  49 };
  50
  51 #define to_capture_priv(v) container_of(v, struct capture_priv, vdev)
  52
  53 /* In bytes, per queue */
  54 #define VID_MEM_LIMIT   SZ_64M
  55
  56 /* -----------------------------------------------------------------------------
  57  * MC-Centric Video IOCTLs
  58  */
  59
  60 static const struct imx_media_pixfmt *capture_find_format(u32 code, u32 fourcc)
  61 {
  62         const struct imx_media_pixfmt *cc;
  63
  64         cc = imx_media_find_ipu_format(code, PIXFMT_SEL_YUV_RGB);
  65         if (cc) {
  66                 enum imx_pixfmt_sel fmt_sel = cc->cs == IPUV3_COLORSPACE_YUV
  67                                             ? PIXFMT_SEL_YUV : PIXFMT_SEL_RGB;
  68
  69                 cc = imx_media_find_pixel_format(fourcc, fmt_sel);
  70                 if (!cc) {
  71                         imx_media_enum_pixel_formats(&fourcc, 0, fmt_sel, 0);
  72                         cc = imx_media_find_pixel_format(fourcc, fmt_sel);
  73                 }
  74
  75                 return cc;
  76         }
  77
  78         return imx_media_find_mbus_format(code, PIXFMT_SEL_ANY);
  79 }
  80
  81 static int capture_querycap(struct file *file, void *fh,
  82                             struct v4l2_capability *cap)
  83 {
  84         struct capture_priv *priv = video_drvdata(file);
  85
  86         strscpy(cap->driver, IMX_CAPTURE_NAME, sizeof(cap->driver));
  87         strscpy(cap->card, IMX_CAPTURE_NAME, sizeof(cap->card));
  88         snprintf(cap->bus_info, sizeof(cap->bus_info),
  89                  "platform:%s", dev_name(priv->dev));
  90
  91         return 0;
  92 }
  93
  94 static int capture_enum_fmt_vid_cap(struct file *file, void *fh,
  95                                     struct v4l2_fmtdesc *f)
  96 {
  97         return imx_media_enum_pixel_formats(&f->pixelformat, f->index,
  98                                             PIXFMT_SEL_ANY, f->mbus_code);
  99 }
 100
 101 static int capture_enum_framesizes(struct file *file, void *fh,
 102                                    struct v4l2_frmsizeenum *fsize)
 103 {
 104         const struct imx_media_pixfmt *cc;
 105
 106         if (fsize->index > 0)
 107                 return -EINVAL;
 108
 109         cc = imx_media_find_pixel_format(fsize->pixel_format, PIXFMT_SEL_ANY);
 110         if (!cc)
 111                 return -EINVAL;
 112
 113         /*
 114          * TODO: The constraints are hardware-specific and may depend on the
 115          * pixel format. This should come from the driver using
 116          * imx_media_capture.
 117          */
 118         fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
 119         fsize->stepwise.min_width = 1;
 120         fsize->stepwise.max_width = 65535;
 121         fsize->stepwise.min_height = 1;
 122         fsize->stepwise.max_height = 65535;
 123         fsize->stepwise.step_width = 1;
 124         fsize->stepwise.step_height = 1;
 125
 126         return 0;
 127 }
 128
 129 static int capture_g_fmt_vid_cap(struct file *file, void *fh,
 130                                  struct v4l2_format *f)
 131 {
 132         struct capture_priv *priv = video_drvdata(file);
 133
 134         f->fmt.pix = priv->vdev.fmt;
 135
 136         return 0;
 137 }
 138
 139 static const struct imx_media_pixfmt *
 140 __capture_try_fmt(struct v4l2_pix_format *pixfmt, struct v4l2_rect *compose)
 141 {
 142         struct v4l2_mbus_framefmt fmt_src;
 143         const struct imx_media_pixfmt *cc;
 144
 145         /*
 146          * Find the pixel format, default to the first supported format if not
 147          * found.
 148          */
 149         cc = imx_media_find_pixel_format(pixfmt->pixelformat, PIXFMT_SEL_ANY);
 150         if (!cc) {
 151                 imx_media_enum_pixel_formats(&pixfmt->pixelformat, 0,
 152                                              PIXFMT_SEL_ANY, 0);
 153                 cc = imx_media_find_pixel_format(pixfmt->pixelformat,
 154                                                  PIXFMT_SEL_ANY);
 155         }
 156
 157         /* Allow IDMAC interweave but enforce field order from source. */
 158         if (V4L2_FIELD_IS_INTERLACED(pixfmt->field)) {
 159                 switch (pixfmt->field) {
 160                 case V4L2_FIELD_SEQ_TB:
 161                         pixfmt->field = V4L2_FIELD_INTERLACED_TB;
 162                         break;
 163                 case V4L2_FIELD_SEQ_BT:
 164                         pixfmt->field = V4L2_FIELD_INTERLACED_BT;
 165                         break;
 166                 default:
 167                         break;
 168                 }
 169         }
 170
 171         v4l2_fill_mbus_format(&fmt_src, pixfmt, 0);
 172         imx_media_mbus_fmt_to_pix_fmt(pixfmt, &fmt_src, cc);
 173
 174         if (compose) {
 175                 compose->width = fmt_src.width;
 176                 compose->height = fmt_src.height;
 177         }
 178
 179         return cc;
 180 }
 181
 182 static int capture_try_fmt_vid_cap(struct file *file, void *fh,
 183                                    struct v4l2_format *f)
 184 {
 185         __capture_try_fmt(&f->fmt.pix, NULL);
 186         return 0;
 187 }
 188
 189 static int capture_s_fmt_vid_cap(struct file *file, void *fh,
 190                                  struct v4l2_format *f)
 191 {
 192         struct capture_priv *priv = video_drvdata(file);
 193         const struct imx_media_pixfmt *cc;
 194
 195         if (vb2_is_busy(&priv->q)) {
 196                 dev_err(priv->dev, "%s queue busy\n", __func__);
 197                 return -EBUSY;
 198         }
 199
 200         cc = __capture_try_fmt(&f->fmt.pix, &priv->vdev.compose);
 201
 202         priv->vdev.cc = cc;
 203         priv->vdev.fmt = f->fmt.pix;
 204
 205         return 0;
 206 }
 207
 208 static int capture_g_selection(struct file *file, void *fh,
 209                                struct v4l2_selection *s)
 210 {
 211         struct capture_priv *priv = video_drvdata(file);
 212
 213         switch (s->target) {
 214         case V4L2_SEL_TGT_COMPOSE:
 215         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 216         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 217                 /* The compose rectangle is fixed to the source format. */
 218                 s->r = priv->vdev.compose;
 219                 break;
 220         case V4L2_SEL_TGT_COMPOSE_PADDED:
 221                 /*
 222                  * The hardware writes with a configurable but fixed DMA burst
 223                  * size. If the source format width is not burst size aligned,
 224                  * the written frame contains padding to the right.
 225                  */
 226                 s->r.left = 0;
 227                 s->r.top = 0;
 228                 s->r.width = priv->vdev.fmt.width;
 229                 s->r.height = priv->vdev.fmt.height;
 230                 break;
 231         default:
 232                 return -EINVAL;
 233         }
 234
 235         return 0;
 236 }
 237
 238 static int capture_subscribe_event(struct v4l2_fh *fh,
 239                                    const struct v4l2_event_subscription *sub)
 240 {
 241         switch (sub->type) {
 242         case V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR:
 243                 return v4l2_event_subscribe(fh, sub, 0, NULL);
 244         default:
 245                 return -EINVAL;
 246         }
 247 }
 248
 249 static const struct v4l2_ioctl_ops capture_ioctl_ops = {
 250         .vidioc_querycap                = capture_querycap,
 251
 252         .vidioc_enum_fmt_vid_cap        = capture_enum_fmt_vid_cap,
 253         .vidioc_enum_framesizes         = capture_enum_framesizes,
 254
 255         .vidioc_g_fmt_vid_cap           = capture_g_fmt_vid_cap,
 256         .vidioc_try_fmt_vid_cap         = capture_try_fmt_vid_cap,
 257         .vidioc_s_fmt_vid_cap           = capture_s_fmt_vid_cap,
 258
 259         .vidioc_g_selection             = capture_g_selection,
 260
 261         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 262         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 263         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 264         .vidioc_querybuf                = vb2_ioctl_querybuf,
 265         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 266         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 267         .vidioc_expbuf                  = vb2_ioctl_expbuf,
 268         .vidioc_streamon                = vb2_ioctl_streamon,
 269         .vidioc_streamoff               = vb2_ioctl_streamoff,
 270
 271         .vidioc_subscribe_event         = capture_subscribe_event,
 272         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 273 };
 274
 275 /* -----------------------------------------------------------------------------
 276  * Legacy Video IOCTLs
 277  */
 278
 279 static int capture_legacy_enum_framesizes(struct file *file, void *fh,
 280                                           struct v4l2_frmsizeenum *fsize)
 281 {
 282         struct capture_priv *priv = video_drvdata(file);
 283         const struct imx_media_pixfmt *cc;
 284         struct v4l2_subdev_frame_size_enum fse = {
 285                 .index = fsize->index,
 286                 .pad = priv->src_sd_pad,
 287                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 288         };
 289         int ret;
 290
 291         cc = imx_media_find_pixel_format(fsize->pixel_format, PIXFMT_SEL_ANY);
 292         if (!cc)
 293                 return -EINVAL;
 294
 295         fse.code = cc->codes ? cc->codes[0] : 0;
 296
 297         ret = v4l2_subdev_call(priv->src_sd, pad, enum_frame_size, NULL, &fse);
 298         if (ret)
 299                 return ret;
 300
 301         if (fse.min_width == fse.max_width &&
 302             fse.min_height == fse.max_height) {
 303                 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
 304                 fsize->discrete.width = fse.min_width;
 305                 fsize->discrete.height = fse.min_height;
 306         } else {
 307                 fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
 308                 fsize->stepwise.min_width = fse.min_width;
 309                 fsize->stepwise.max_width = fse.max_width;
 310                 fsize->stepwise.min_height = fse.min_height;
 311                 fsize->stepwise.max_height = fse.max_height;
 312                 fsize->stepwise.step_width = 1;
 313                 fsize->stepwise.step_height = 1;
 314         }
 315
 316         return 0;
 317 }
 318
 319 static int capture_legacy_enum_frameintervals(struct file *file, void *fh,
 320                                               struct v4l2_frmivalenum *fival)
 321 {
 322         struct capture_priv *priv = video_drvdata(file);
 323         const struct imx_media_pixfmt *cc;
 324         struct v4l2_subdev_frame_interval_enum fie = {
 325                 .index = fival->index,
 326                 .pad = priv->src_sd_pad,
 327                 .width = fival->width,
 328                 .height = fival->height,
 329                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 330         };
 331         int ret;
 332
 333         cc = imx_media_find_pixel_format(fival->pixel_format, PIXFMT_SEL_ANY);
 334         if (!cc)
 335                 return -EINVAL;
 336
 337         fie.code = cc->codes ? cc->codes[0] : 0;
 338
 339         ret = v4l2_subdev_call(priv->src_sd, pad, enum_frame_interval,
 340                                NULL, &fie);
 341         if (ret)
 342                 return ret;
 343
 344         fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
 345         fival->discrete = fie.interval;
 346
 347         return 0;
 348 }
 349
 350 static int capture_legacy_enum_fmt_vid_cap(struct file *file, void *fh,
 351                                            struct v4l2_fmtdesc *f)
 352 {
 353         struct capture_priv *priv = video_drvdata(file);
 354         const struct imx_media_pixfmt *cc_src;
 355         struct v4l2_subdev_format fmt_src = {
 356                 .pad = priv->src_sd_pad,
 357                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 358         };
 359         u32 fourcc;
 360         int ret;
 361
 362         ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src);
 363         if (ret) {
 364                 dev_err(priv->dev, "failed to get src_sd format\n");
 365                 return ret;
 366         }
 367
 368         cc_src = imx_media_find_ipu_format(fmt_src.format.code,
 369                                            PIXFMT_SEL_YUV_RGB);
 370         if (cc_src) {
 371                 enum imx_pixfmt_sel fmt_sel =
 372                         (cc_src->cs == IPUV3_COLORSPACE_YUV) ?
 373                         PIXFMT_SEL_YUV : PIXFMT_SEL_RGB;
 374
 375                 ret = imx_media_enum_pixel_formats(&fourcc, f->index, fmt_sel,
 376                                                    0);
 377                 if (ret)
 378                         return ret;
 379         } else {
 380                 cc_src = imx_media_find_mbus_format(fmt_src.format.code,
 381                                                     PIXFMT_SEL_ANY);
 382                 if (WARN_ON(!cc_src))
 383                         return -EINVAL;
 384
 385                 if (f->index != 0)
 386                         return -EINVAL;
 387                 fourcc = cc_src->fourcc;
 388         }
 389
 390         f->pixelformat = fourcc;
 391
 392         return 0;
 393 }
 394
 395 static const struct imx_media_pixfmt *
 396 __capture_legacy_try_fmt(struct capture_priv *priv,
 397                          struct v4l2_subdev_format *fmt_src,
 398                          struct v4l2_pix_format *pixfmt)
 399 {
 400         const struct imx_media_pixfmt *cc;
 401
 402         cc = capture_find_format(fmt_src->format.code, pixfmt->pixelformat);
 403         if (WARN_ON(!cc))
 404                 return NULL;
 405
 406         /* allow IDMAC interweave but enforce field order from source */
 407         if (V4L2_FIELD_IS_INTERLACED(pixfmt->field)) {
 408                 switch (fmt_src->format.field) {
 409                 case V4L2_FIELD_SEQ_TB:
 410                         fmt_src->format.field = V4L2_FIELD_INTERLACED_TB;
 411                         break;
 412                 case V4L2_FIELD_SEQ_BT:
 413                         fmt_src->format.field = V4L2_FIELD_INTERLACED_BT;
 414                         break;
 415                 default:
 416                         break;
 417                 }
 418         }
 419
 420         imx_media_mbus_fmt_to_pix_fmt(pixfmt, &fmt_src->format, cc);
 421
 422         return cc;
 423 }
 424
 425 static int capture_legacy_try_fmt_vid_cap(struct file *file, void *fh,
 426                                           struct v4l2_format *f)
 427 {
 428         struct capture_priv *priv = video_drvdata(file);
 429         struct v4l2_subdev_format fmt_src = {
 430                 .pad = priv->src_sd_pad,
 431                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 432         };
 433         int ret;
 434
 435         ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src);
 436         if (ret)
 437                 return ret;
 438
 439         if (!__capture_legacy_try_fmt(priv, &fmt_src, &f->fmt.pix))
 440                 return -EINVAL;
 441
 442         return 0;
 443 }
 444
 445 static int capture_legacy_s_fmt_vid_cap(struct file *file, void *fh,
 446                                         struct v4l2_format *f)
 447 {
 448         struct capture_priv *priv = video_drvdata(file);
 449         struct v4l2_subdev_format fmt_src = {
 450                 .pad = priv->src_sd_pad,
 451                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 452         };
 453         const struct imx_media_pixfmt *cc;
 454         int ret;
 455
 456         if (vb2_is_busy(&priv->q)) {
 457                 dev_err(priv->dev, "%s queue busy\n", __func__);
 458                 return -EBUSY;
 459         }
 460
 461         ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src);
 462         if (ret)
 463                 return ret;
 464
 465         cc = __capture_legacy_try_fmt(priv, &fmt_src, &f->fmt.pix);
 466         if (!cc)
 467                 return -EINVAL;
 468
 469         priv->vdev.cc = cc;
 470         priv->vdev.fmt = f->fmt.pix;
 471         priv->vdev.compose.width = fmt_src.format.width;
 472         priv->vdev.compose.height = fmt_src.format.height;
 473
 474         return 0;
 475 }
 476
 477 static int capture_legacy_querystd(struct file *file, void *fh,
 478                                    v4l2_std_id *std)
 479 {
 480         struct capture_priv *priv = video_drvdata(file);
 481
 482         return v4l2_subdev_call(priv->src_sd, video, querystd, std);
 483 }
 484
 485 static int capture_legacy_g_std(struct file *file, void *fh, v4l2_std_id *std)
 486 {
 487         struct capture_priv *priv = video_drvdata(file);
 488
 489         return v4l2_subdev_call(priv->src_sd, video, g_std, std);
 490 }
 491
 492 static int capture_legacy_s_std(struct file *file, void *fh, v4l2_std_id std)
 493 {
 494         struct capture_priv *priv = video_drvdata(file);
 495
 496         if (vb2_is_busy(&priv->q))
 497                 return -EBUSY;
 498
 499         return v4l2_subdev_call(priv->src_sd, video, s_std, std);
 500 }
 501
 502 static int capture_legacy_g_parm(struct file *file, void *fh,
 503                                  struct v4l2_streamparm *a)
 504 {
 505         struct capture_priv *priv = video_drvdata(file);
 506         struct v4l2_subdev_frame_interval fi = {
 507                 .pad = priv->src_sd_pad,
 508         };
 509         int ret;
 510
 511         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 512                 return -EINVAL;
 513
 514         ret = v4l2_subdev_call(priv->src_sd, video, g_frame_interval, &fi);
 515         if (ret < 0)
 516                 return ret;
 517
 518         a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
 519         a->parm.capture.timeperframe = fi.interval;
 520
 521         return 0;
 522 }
 523
 524 static int capture_legacy_s_parm(struct file *file, void *fh,
 525                                  struct v4l2_streamparm *a)
 526 {
 527         struct capture_priv *priv = video_drvdata(file);
 528         struct v4l2_subdev_frame_interval fi = {
 529                 .pad = priv->src_sd_pad,
 530         };
 531         int ret;
 532
 533         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 534                 return -EINVAL;
 535
 536         fi.interval = a->parm.capture.timeperframe;
 537         ret = v4l2_subdev_call(priv->src_sd, video, s_frame_interval, &fi);
 538         if (ret < 0)
 539                 return ret;
 540
 541         a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
 542         a->parm.capture.timeperframe = fi.interval;
 543
 544         return 0;
 545 }
 546
 547 static int capture_legacy_subscribe_event(struct v4l2_fh *fh,
 548                                           const struct v4l2_event_subscription *sub)
 549 {
 550         switch (sub->type) {
 551         case V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR:
 552                 return v4l2_event_subscribe(fh, sub, 0, NULL);
 553         case V4L2_EVENT_SOURCE_CHANGE:
 554                 return v4l2_src_change_event_subscribe(fh, sub);
 555         case V4L2_EVENT_CTRL:
 556                 return v4l2_ctrl_subscribe_event(fh, sub);
 557         default:
 558                 return -EINVAL;
 559         }
 560 }
 561
 562 static const struct v4l2_ioctl_ops capture_legacy_ioctl_ops = {
 563         .vidioc_querycap                = capture_querycap,
 564
 565         .vidioc_enum_framesizes         = capture_legacy_enum_framesizes,
 566         .vidioc_enum_frameintervals     = capture_legacy_enum_frameintervals,
 567
 568         .vidioc_enum_fmt_vid_cap        = capture_legacy_enum_fmt_vid_cap,
 569         .vidioc_g_fmt_vid_cap           = capture_g_fmt_vid_cap,
 570         .vidioc_try_fmt_vid_cap         = capture_legacy_try_fmt_vid_cap,
 571         .vidioc_s_fmt_vid_cap           = capture_legacy_s_fmt_vid_cap,
 572
 573         .vidioc_querystd                = capture_legacy_querystd,
 574         .vidioc_g_std                   = capture_legacy_g_std,
 575         .vidioc_s_std                   = capture_legacy_s_std,
 576
 577         .vidioc_g_selection             = capture_g_selection,
 578
 579         .vidioc_g_parm                  = capture_legacy_g_parm,
 580         .vidioc_s_parm                  = capture_legacy_s_parm,
 581
 582         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 583         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 584         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 585         .vidioc_querybuf                = vb2_ioctl_querybuf,
 586         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 587         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 588         .vidioc_expbuf                  = vb2_ioctl_expbuf,
 589         .vidioc_streamon                = vb2_ioctl_streamon,
 590         .vidioc_streamoff               = vb2_ioctl_streamoff,
 591
 592         .vidioc_subscribe_event         = capture_legacy_subscribe_event,
 593         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 594 };
 595
 596 /* -----------------------------------------------------------------------------
 597  * Queue Operations
 598  */
 599
 600 static int capture_queue_setup(struct vb2_queue *vq,
 601                                unsigned int *nbuffers,
 602                                unsigned int *nplanes,
 603                                unsigned int sizes[],
 604                                struct device *alloc_devs[])
 605 {
 606         struct capture_priv *priv = vb2_get_drv_priv(vq);
 607         struct v4l2_pix_format *pix = &priv->vdev.fmt;
 608         unsigned int count = *nbuffers;
 609
 610         if (vq->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 611                 return -EINVAL;
 612
 613         if (*nplanes) {
 614                 if (*nplanes != 1 || sizes[0] < pix->sizeimage)
 615                         return -EINVAL;
 616                 count += vq->num_buffers;
 617         }
 618
 619         count = min_t(__u32, VID_MEM_LIMIT / pix->sizeimage, count);
 620
 621         if (*nplanes)
 622                 *nbuffers = (count < vq->num_buffers) ? 0 :
 623                         count - vq->num_buffers;
 624         else
 625                 *nbuffers = count;
 626
 627         *nplanes = 1;
 628         sizes[0] = pix->sizeimage;
 629
 630         return 0;
 631 }
 632
 633 static int capture_buf_init(struct vb2_buffer *vb)
 634 {
 635         struct imx_media_buffer *buf = to_imx_media_vb(vb);
 636
 637         INIT_LIST_HEAD(&buf->list);
 638
 639         return 0;
 640 }
 641
 642 static int capture_buf_prepare(struct vb2_buffer *vb)
 643 {
 644         struct vb2_queue *vq = vb->vb2_queue;
 645         struct capture_priv *priv = vb2_get_drv_priv(vq);
 646         struct v4l2_pix_format *pix = &priv->vdev.fmt;
 647
 648         if (vb2_plane_size(vb, 0) < pix->sizeimage) {
 649                 dev_err(priv->dev,
 650                         "data will not fit into plane (%lu < %lu)\n",
 651                         vb2_plane_size(vb, 0), (long)pix->sizeimage);
 652                 return -EINVAL;
 653         }
 654
 655         vb2_set_plane_payload(vb, 0, pix->sizeimage);
 656
 657         return 0;
 658 }
 659
 660 static void capture_buf_queue(struct vb2_buffer *vb)
 661 {
 662         struct capture_priv *priv = vb2_get_drv_priv(vb->vb2_queue);
 663         struct imx_media_buffer *buf = to_imx_media_vb(vb);
 664         unsigned long flags;
 665
 666         spin_lock_irqsave(&priv->q_lock, flags);
 667
 668         list_add_tail(&buf->list, &priv->ready_q);
 669
 670         spin_unlock_irqrestore(&priv->q_lock, flags);
 671 }
 672
 673 static int capture_validate_fmt(struct capture_priv *priv)
 674 {
 675         struct v4l2_subdev_format fmt_src = {
 676                 .pad = priv->src_sd_pad,
 677                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 678         };
 679         const struct imx_media_pixfmt *cc;
 680         int ret;
 681
 682         /* Retrieve the media bus format on the source subdev. */
 683         ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src);
 684         if (ret)
 685                 return ret;
 686
 687         /*
 688          * Verify that the media bus size matches the size set on the video
 689          * node. It is sufficient to check the compose rectangle size without
 690          * checking the rounded size from vdev.fmt, as the rounded size is
 691          * derived directly from the compose rectangle size, and will thus
 692          * always match if the compose rectangle matches.
 693          */
 694         if (priv->vdev.compose.width != fmt_src.format.width ||
 695             priv->vdev.compose.height != fmt_src.format.height)
 696                 return -EPIPE;
 697
 698         /*
 699          * Verify that the media bus code is compatible with the pixel format
 700          * set on the video node.
 701          */
 702         cc = capture_find_format(fmt_src.format.code, 0);
 703         if (!cc || priv->vdev.cc->cs != cc->cs)
 704                 return -EPIPE;
 705
 706         return 0;
 707 }
 708
 709 static int capture_start_streaming(struct vb2_queue *vq, unsigned int count)
 710 {
 711         struct capture_priv *priv = vb2_get_drv_priv(vq);
 712         struct imx_media_buffer *buf, *tmp;
 713         unsigned long flags;
 714         int ret;
 715
 716         ret = capture_validate_fmt(priv);
 717         if (ret) {
 718                 dev_err(priv->dev, "capture format not valid\n");
 719                 goto return_bufs;
 720         }
 721
 722         ret = imx_media_pipeline_set_stream(priv->md, &priv->src_sd->entity,
 723                                             true);
 724         if (ret) {
 725                 dev_err(priv->dev, "pipeline start failed with %d\n", ret);
 726                 goto return_bufs;
 727         }
 728
 729         return 0;
 730
 731 return_bufs:
 732         spin_lock_irqsave(&priv->q_lock, flags);
 733         list_for_each_entry_safe(buf, tmp, &priv->ready_q, list) {
 734                 list_del(&buf->list);
 735                 vb2_buffer_done(&buf->vbuf.vb2_buf, VB2_BUF_STATE_QUEUED);
 736         }
 737         spin_unlock_irqrestore(&priv->q_lock, flags);
 738         return ret;
 739 }
 740
 741 static void capture_stop_streaming(struct vb2_queue *vq)
 742 {
 743         struct capture_priv *priv = vb2_get_drv_priv(vq);
 744         struct imx_media_buffer *frame;
 745         struct imx_media_buffer *tmp;
 746         unsigned long flags;
 747         int ret;
 748
 749         ret = imx_media_pipeline_set_stream(priv->md, &priv->src_sd->entity,
 750                                             false);
 751         if (ret)
 752                 dev_warn(priv->dev, "pipeline stop failed with %d\n", ret);
 753
 754         /* release all active buffers */
 755         spin_lock_irqsave(&priv->q_lock, flags);
 756         list_for_each_entry_safe(frame, tmp, &priv->ready_q, list) {
 757                 list_del(&frame->list);
 758                 vb2_buffer_done(&frame->vbuf.vb2_buf, VB2_BUF_STATE_ERROR);
 759         }
 760         spin_unlock_irqrestore(&priv->q_lock, flags);
 761 }
 762
 763 static const struct vb2_ops capture_qops = {
 764         .queue_setup     = capture_queue_setup,
 765         .buf_init        = capture_buf_init,
 766         .buf_prepare     = capture_buf_prepare,
 767         .buf_queue       = capture_buf_queue,
 768         .wait_prepare    = vb2_ops_wait_prepare,
 769         .wait_finish     = vb2_ops_wait_finish,
 770         .start_streaming = capture_start_streaming,
 771         .stop_streaming  = capture_stop_streaming,
 772 };
 773
 774 /* -----------------------------------------------------------------------------
 775  * File Operations
 776  */
 777
 778 static int capture_open(struct file *file)
 779 {
 780         struct capture_priv *priv = video_drvdata(file);
 781         struct video_device *vfd = priv->vdev.vfd;
 782         int ret;
 783
 784         if (mutex_lock_interruptible(&priv->mutex))
 785                 return -ERESTARTSYS;
 786
 787         ret = v4l2_fh_open(file);
 788         if (ret) {
 789                 dev_err(priv->dev, "v4l2_fh_open failed\n");
 790                 goto out;
 791         }
 792
 793         ret = v4l2_pipeline_pm_get(&vfd->entity);
 794         if (ret)
 795                 v4l2_fh_release(file);
 796
 797 out:
 798         mutex_unlock(&priv->mutex);
 799         return ret;
 800 }
 801
 802 static int capture_release(struct file *file)
 803 {
 804         struct capture_priv *priv = video_drvdata(file);
 805         struct video_device *vfd = priv->vdev.vfd;
 806         struct vb2_queue *vq = &priv->q;
 807
 808         mutex_lock(&priv->mutex);
 809
 810         if (file->private_data == vq->owner) {
 811                 vb2_queue_release(vq);
 812                 vq->owner = NULL;
 813         }
 814
 815         v4l2_pipeline_pm_put(&vfd->entity);
 816
 817         v4l2_fh_release(file);
 818         mutex_unlock(&priv->mutex);
 819         return 0;
 820 }
 821
 822 static const struct v4l2_file_operations capture_fops = {
 823         .owner          = THIS_MODULE,
 824         .open           = capture_open,
 825         .release        = capture_release,
 826         .poll           = vb2_fop_poll,
 827         .unlocked_ioctl = video_ioctl2,
 828         .mmap           = vb2_fop_mmap,
 829 };
 830
 831 /* -----------------------------------------------------------------------------
 832  * Public API
 833  */
 834
 835 struct imx_media_buffer *
 836 imx_media_capture_device_next_buf(struct imx_media_video_dev *vdev)
 837 {
 838         struct capture_priv *priv = to_capture_priv(vdev);
 839         struct imx_media_buffer *buf = NULL;
 840         unsigned long flags;
 841
 842         spin_lock_irqsave(&priv->q_lock, flags);
 843
 844         /* get next queued buffer */
 845         if (!list_empty(&priv->ready_q)) {
 846                 buf = list_entry(priv->ready_q.next, struct imx_media_buffer,
 847                                  list);
 848                 list_del(&buf->list);
 849         }
 850
 851         spin_unlock_irqrestore(&priv->q_lock, flags);
 852
 853         return buf;
 854 }
 855 EXPORT_SYMBOL_GPL(imx_media_capture_device_next_buf);
 856
 857 void imx_media_capture_device_error(struct imx_media_video_dev *vdev)
 858 {
 859         struct capture_priv *priv = to_capture_priv(vdev);
 860         struct vb2_queue *vq = &priv->q;
 861         unsigned long flags;
 862
 863         if (!vb2_is_streaming(vq))
 864                 return;
 865
 866         spin_lock_irqsave(&priv->q_lock, flags);
 867         vb2_queue_error(vq);
 868         spin_unlock_irqrestore(&priv->q_lock, flags);
 869 }
 870 EXPORT_SYMBOL_GPL(imx_media_capture_device_error);
 871
 872 static int capture_init_format(struct capture_priv *priv)
 873 {
 874         struct v4l2_subdev_format fmt_src = {
 875                 .pad = priv->src_sd_pad,
 876                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 877         };
 878         struct imx_media_video_dev *vdev = &priv->vdev;
 879         int ret;
 880
 881         if (priv->legacy_api) {
 882                 ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL,
 883                                        &fmt_src);
 884                 if (ret) {
 885                         dev_err(priv->dev, "failed to get source format\n");
 886                         return ret;
 887                 }
 888         } else {
 889                 fmt_src.format.code = MEDIA_BUS_FMT_UYVY8_2X8;
 890                 fmt_src.format.width = IMX_MEDIA_DEF_PIX_WIDTH;
 891                 fmt_src.format.height = IMX_MEDIA_DEF_PIX_HEIGHT;
 892         }
 893
 894         imx_media_mbus_fmt_to_pix_fmt(&vdev->fmt, &fmt_src.format, NULL);
 895         vdev->compose.width = fmt_src.format.width;
 896         vdev->compose.height = fmt_src.format.height;
 897
 898         vdev->cc = imx_media_find_pixel_format(vdev->fmt.pixelformat,
 899                                                PIXFMT_SEL_ANY);
 900
 901         return 0;
 902 }
 903
 904 int imx_media_capture_device_register(struct imx_media_video_dev *vdev,
 905                                       u32 link_flags)
 906 {
 907         struct capture_priv *priv = to_capture_priv(vdev);
 908         struct v4l2_subdev *sd = priv->src_sd;
 909         struct v4l2_device *v4l2_dev = sd->v4l2_dev;
 910         struct video_device *vfd = vdev->vfd;
 911         int ret;
 912
 913         /* get media device */
 914         priv->md = container_of(v4l2_dev->mdev, struct imx_media_dev, md);
 915
 916         vfd->v4l2_dev = v4l2_dev;
 917
 918         /* Initialize the default format and compose rectangle. */
 919         ret = capture_init_format(priv);
 920         if (ret < 0)
 921                 return ret;
 922
 923         /* Register the video device. */
 924         ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
 925         if (ret) {
 926                 dev_err(priv->dev, "Failed to register video device\n");
 927                 return ret;
 928         }
 929
 930         dev_info(priv->dev, "Registered %s as /dev/%s\n", vfd->name,
 931                  video_device_node_name(vfd));
 932
 933         /* Create the link from the src_sd devnode pad to device node. */
 934         if (link_flags & MEDIA_LNK_FL_IMMUTABLE)
 935                 link_flags |= MEDIA_LNK_FL_ENABLED;
 936         ret = media_create_pad_link(&sd->entity, priv->src_sd_pad,
 937                                     &vfd->entity, 0, link_flags);
 938         if (ret) {
 939                 dev_err(priv->dev, "failed to create link to device node\n");
 940                 video_unregister_device(vfd);
 941                 return ret;
 942         }
 943
 944         /* Add vdev to the video devices list. */
 945         imx_media_add_video_device(priv->md, vdev);
 946
 947         return 0;
 948 }
 949 EXPORT_SYMBOL_GPL(imx_media_capture_device_register);
 950
 951 void imx_media_capture_device_unregister(struct imx_media_video_dev *vdev)
 952 {
 953         struct capture_priv *priv = to_capture_priv(vdev);
 954         struct video_device *vfd = priv->vdev.vfd;
 955
 956         media_entity_cleanup(&vfd->entity);
 957         video_unregister_device(vfd);
 958 }
 959 EXPORT_SYMBOL_GPL(imx_media_capture_device_unregister);
 960
 961 struct imx_media_video_dev *
 962 imx_media_capture_device_init(struct device *dev, struct v4l2_subdev *src_sd,
 963                               int pad, bool legacy_api)
 964 {
 965         struct capture_priv *priv;
 966         struct video_device *vfd;
 967         struct vb2_queue *vq;
 968         int ret;
 969
 970         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 971         if (!priv)
 972                 return ERR_PTR(-ENOMEM);
 973
 974         priv->src_sd = src_sd;
 975         priv->src_sd_pad = pad;
 976         priv->dev = dev;
 977         priv->legacy_api = legacy_api;
 978
 979         mutex_init(&priv->mutex);
 980         INIT_LIST_HEAD(&priv->ready_q);
 981         spin_lock_init(&priv->q_lock);
 982
 983         /* Allocate and initialize the video device. */
 984         vfd = video_device_alloc();
 985         if (!vfd)
 986                 return ERR_PTR(-ENOMEM);
 987
 988         vfd->fops = &capture_fops;
 989         vfd->ioctl_ops = legacy_api ? &capture_legacy_ioctl_ops
 990                        : &capture_ioctl_ops;
 991         vfd->minor = -1;
 992         vfd->release = video_device_release;
 993         vfd->vfl_dir = VFL_DIR_RX;
 994         vfd->tvnorms = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM;
 995         vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING
 996                          | (!legacy_api ? V4L2_CAP_IO_MC : 0);
 997         vfd->lock = &priv->mutex;
 998         vfd->queue = &priv->q;
 999
1000         snprintf(vfd->name, sizeof(vfd->name), "%s capture", src_sd->name);
1001
1002         video_set_drvdata(vfd, priv);
1003         priv->vdev.vfd = vfd;
1004         INIT_LIST_HEAD(&priv->vdev.list);
1005
1006         /* Initialize the video device pad. */
1007         priv->vdev_pad.flags = MEDIA_PAD_FL_SINK;
1008         ret = media_entity_pads_init(&vfd->entity, 1, &priv->vdev_pad);
1009         if (ret) {
1010                 video_device_release(vfd);
1011                 return ERR_PTR(ret);
1012         }
1013
1014         /* Initialize the vb2 queue. */
1015         vq = &priv->q;
1016         vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1017         vq->io_modes = VB2_MMAP | VB2_DMABUF;
1018         vq->drv_priv = priv;
1019         vq->buf_struct_size = sizeof(struct imx_media_buffer);
1020         vq->ops = &capture_qops;
1021         vq->mem_ops = &vb2_dma_contig_memops;
1022         vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1023         vq->lock = &priv->mutex;
1024         vq->min_buffers_needed = 2;
1025         vq->dev = priv->dev;
1026
1027         ret = vb2_queue_init(vq);
1028         if (ret) {
1029                 dev_err(priv->dev, "vb2_queue_init failed\n");
1030                 video_device_release(vfd);
1031                 return ERR_PTR(ret);
1032         }
1033
1034         if (legacy_api) {
1035                 /* Initialize the control handler. */
1036                 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
1037                 vfd->ctrl_handler = &priv->ctrl_hdlr;
1038         }
1039
1040         return &priv->vdev;
1041 }
1042 EXPORT_SYMBOL_GPL(imx_media_capture_device_init);
1043
1044 void imx_media_capture_device_remove(struct imx_media_video_dev *vdev)
1045 {
1046         struct capture_priv *priv = to_capture_priv(vdev);
1047
1048         v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
1049 }
1050 EXPORT_SYMBOL_GPL(imx_media_capture_device_remove);
1051
1052 MODULE_DESCRIPTION("i.MX5/6 v4l2 video capture interface driver");
1053 MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>");
1054 MODULE_LICENSE("GPL");