drivers/media/platform/omap3isp/ispvideo.c

   1 /*
   2  * ispvideo.c
   3  *
   4  * TI OMAP3 ISP - Generic video node
   5  *
   6  * Copyright (C) 2009-2010 Nokia Corporation
   7  *
   8  * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
   9  *           Sakari Ailus <sakari.ailus@iki.fi>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  23  * 02110-1301 USA
  24  */
  25
  26 #include <asm/cacheflush.h>
  27 #include <linux/clk.h>
  28 #include <linux/mm.h>
  29 #include <linux/module.h>
  30 #include <linux/omap-iommu.h>
  31 #include <linux/pagemap.h>
  32 #include <linux/scatterlist.h>
  33 #include <linux/sched.h>
  34 #include <linux/slab.h>
  35 #include <linux/vmalloc.h>
  36 #include <media/v4l2-dev.h>
  37 #include <media/v4l2-ioctl.h>
  38
  39 #include "ispvideo.h"
  40 #include "isp.h"
  41
  42
  43 /* -----------------------------------------------------------------------------
  44  * Helper functions
  45  */
  46
  47 /*
  48  * NOTE: When adding new media bus codes, always remember to add
  49  * corresponding in-memory formats to the table below!!!
  50  */
  51 static struct isp_format_info formats[] = {
  52         { V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8,
  53           V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8,
  54           V4L2_PIX_FMT_GREY, 8, 1, },
  55         { V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y10_1X10,
  56           V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y8_1X8,
  57           V4L2_PIX_FMT_Y10, 10, 2, },
  58         { V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y10_1X10,
  59           V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y8_1X8,
  60           V4L2_PIX_FMT_Y12, 12, 2, },
  61         { V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8,
  62           V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8,
  63           V4L2_PIX_FMT_SBGGR8, 8, 1, },
  64         { V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8,
  65           V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8,
  66           V4L2_PIX_FMT_SGBRG8, 8, 1, },
  67         { V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8,
  68           V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8,
  69           V4L2_PIX_FMT_SGRBG8, 8, 1, },
  70         { V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8,
  71           V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8,
  72           V4L2_PIX_FMT_SRGGB8, 8, 1, },
  73         { V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8, V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8,
  74           V4L2_MBUS_FMT_SBGGR10_1X10, 0,
  75           V4L2_PIX_FMT_SBGGR10DPCM8, 8, 1, },
  76         { V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8, V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8,
  77           V4L2_MBUS_FMT_SGBRG10_1X10, 0,
  78           V4L2_PIX_FMT_SGBRG10DPCM8, 8, 1, },
  79         { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
  80           V4L2_MBUS_FMT_SGRBG10_1X10, 0,
  81           V4L2_PIX_FMT_SGRBG10DPCM8, 8, 1, },
  82         { V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8, V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8,
  83           V4L2_MBUS_FMT_SRGGB10_1X10, 0,
  84           V4L2_PIX_FMT_SRGGB10DPCM8, 8, 1, },
  85         { V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR10_1X10,
  86           V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR8_1X8,
  87           V4L2_PIX_FMT_SBGGR10, 10, 2, },
  88         { V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG10_1X10,
  89           V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG8_1X8,
  90           V4L2_PIX_FMT_SGBRG10, 10, 2, },
  91         { V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG10_1X10,
  92           V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG8_1X8,
  93           V4L2_PIX_FMT_SGRBG10, 10, 2, },
  94         { V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB10_1X10,
  95           V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB8_1X8,
  96           V4L2_PIX_FMT_SRGGB10, 10, 2, },
  97         { V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR10_1X10,
  98           V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR8_1X8,
  99           V4L2_PIX_FMT_SBGGR12, 12, 2, },
 100         { V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG10_1X10,
 101           V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG8_1X8,
 102           V4L2_PIX_FMT_SGBRG12, 12, 2, },
 103         { V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG10_1X10,
 104           V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG8_1X8,
 105           V4L2_PIX_FMT_SGRBG12, 12, 2, },
 106         { V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB10_1X10,
 107           V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB8_1X8,
 108           V4L2_PIX_FMT_SRGGB12, 12, 2, },
 109         { V4L2_MBUS_FMT_UYVY8_1X16, V4L2_MBUS_FMT_UYVY8_1X16,
 110           V4L2_MBUS_FMT_UYVY8_1X16, 0,
 111           V4L2_PIX_FMT_UYVY, 16, 2, },
 112         { V4L2_MBUS_FMT_YUYV8_1X16, V4L2_MBUS_FMT_YUYV8_1X16,
 113           V4L2_MBUS_FMT_YUYV8_1X16, 0,
 114           V4L2_PIX_FMT_YUYV, 16, 2, },
 115         { V4L2_MBUS_FMT_UYVY8_2X8, V4L2_MBUS_FMT_UYVY8_2X8,
 116           V4L2_MBUS_FMT_UYVY8_2X8, 0,
 117           V4L2_PIX_FMT_UYVY, 8, 2, },
 118         { V4L2_MBUS_FMT_YUYV8_2X8, V4L2_MBUS_FMT_YUYV8_2X8,
 119           V4L2_MBUS_FMT_YUYV8_2X8, 0,
 120           V4L2_PIX_FMT_YUYV, 8, 2, },
 121         /* Empty entry to catch the unsupported pixel code (0) used by the CCDC
 122          * module and avoid NULL pointer dereferences.
 123          */
 124         { 0, }
 125 };
 126
 127 const struct isp_format_info *
 128 omap3isp_video_format_info(enum v4l2_mbus_pixelcode code)
 129 {
 130         unsigned int i;
 131
 132         for (i = 0; i < ARRAY_SIZE(formats); ++i) {
 133                 if (formats[i].code == code)
 134                         return &formats[i];
 135         }
 136
 137         return NULL;
 138 }
 139
 140 /*
 141  * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format
 142  * @video: ISP video instance
 143  * @mbus: v4l2_mbus_framefmt format (input)
 144  * @pix: v4l2_pix_format format (output)
 145  *
 146  * Fill the output pix structure with information from the input mbus format.
 147  * The bytesperline and sizeimage fields are computed from the requested bytes
 148  * per line value in the pix format and information from the video instance.
 149  *
 150  * Return the number of padding bytes at end of line.
 151  */
 152 static unsigned int isp_video_mbus_to_pix(const struct isp_video *video,
 153                                           const struct v4l2_mbus_framefmt *mbus,
 154                                           struct v4l2_pix_format *pix)
 155 {
 156         unsigned int bpl = pix->bytesperline;
 157         unsigned int min_bpl;
 158         unsigned int i;
 159
 160         memset(pix, 0, sizeof(*pix));
 161         pix->width = mbus->width;
 162         pix->height = mbus->height;
 163
 164         for (i = 0; i < ARRAY_SIZE(formats); ++i) {
 165                 if (formats[i].code == mbus->code)
 166                         break;
 167         }
 168
 169         if (WARN_ON(i == ARRAY_SIZE(formats)))
 170                 return 0;
 171
 172         min_bpl = pix->width * formats[i].bpp;
 173
 174         /* Clamp the requested bytes per line value. If the maximum bytes per
 175          * line value is zero, the module doesn't support user configurable line
 176          * sizes. Override the requested value with the minimum in that case.
 177          */
 178         if (video->bpl_max)
 179                 bpl = clamp(bpl, min_bpl, video->bpl_max);
 180         else
 181                 bpl = min_bpl;
 182
 183         if (!video->bpl_zero_padding || bpl != min_bpl)
 184                 bpl = ALIGN(bpl, video->bpl_alignment);
 185
 186         pix->pixelformat = formats[i].pixelformat;
 187         pix->bytesperline = bpl;
 188         pix->sizeimage = pix->bytesperline * pix->height;
 189         pix->colorspace = mbus->colorspace;
 190         pix->field = mbus->field;
 191
 192         return bpl - min_bpl;
 193 }
 194
 195 static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix,
 196                                   struct v4l2_mbus_framefmt *mbus)
 197 {
 198         unsigned int i;
 199
 200         memset(mbus, 0, sizeof(*mbus));
 201         mbus->width = pix->width;
 202         mbus->height = pix->height;
 203
 204         /* Skip the last format in the loop so that it will be selected if no
 205          * match is found.
 206          */
 207         for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) {
 208                 if (formats[i].pixelformat == pix->pixelformat)
 209                         break;
 210         }
 211
 212         mbus->code = formats[i].code;
 213         mbus->colorspace = pix->colorspace;
 214         mbus->field = pix->field;
 215 }
 216
 217 static struct v4l2_subdev *
 218 isp_video_remote_subdev(struct isp_video *video, u32 *pad)
 219 {
 220         struct media_pad *remote;
 221
 222         remote = media_entity_remote_pad(&video->pad);
 223
 224         if (remote == NULL ||
 225             media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 226                 return NULL;
 227
 228         if (pad)
 229                 *pad = remote->index;
 230
 231         return media_entity_to_v4l2_subdev(remote->entity);
 232 }
 233
 234 /* Return a pointer to the ISP video instance at the far end of the pipeline. */
 235 static int isp_video_get_graph_data(struct isp_video *video,
 236                                     struct isp_pipeline *pipe)
 237 {
 238         struct media_entity_graph graph;
 239         struct media_entity *entity = &video->video.entity;
 240         struct media_device *mdev = entity->parent;
 241         struct isp_video *far_end = NULL;
 242
 243         mutex_lock(&mdev->graph_mutex);
 244         media_entity_graph_walk_start(&graph, entity);
 245
 246         while ((entity = media_entity_graph_walk_next(&graph))) {
 247                 struct isp_video *__video;
 248
 249                 pipe->entities |= 1 << entity->id;
 250
 251                 if (far_end != NULL)
 252                         continue;
 253
 254                 if (entity == &video->video.entity)
 255                         continue;
 256
 257                 if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
 258                         continue;
 259
 260                 __video = to_isp_video(media_entity_to_video_device(entity));
 261                 if (__video->type != video->type)
 262                         far_end = __video;
 263         }
 264
 265         mutex_unlock(&mdev->graph_mutex);
 266
 267         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 268                 pipe->input = far_end;
 269                 pipe->output = video;
 270         } else {
 271                 if (far_end == NULL)
 272                         return -EPIPE;
 273
 274                 pipe->input = video;
 275                 pipe->output = far_end;
 276         }
 277
 278         return 0;
 279 }
 280
 281 static int
 282 __isp_video_get_format(struct isp_video *video, struct v4l2_format *format)
 283 {
 284         struct v4l2_subdev_format fmt;
 285         struct v4l2_subdev *subdev;
 286         u32 pad;
 287         int ret;
 288
 289         subdev = isp_video_remote_subdev(video, &pad);
 290         if (subdev == NULL)
 291                 return -EINVAL;
 292
 293         fmt.pad = pad;
 294         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 295
 296         mutex_lock(&video->mutex);
 297         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 298         mutex_unlock(&video->mutex);
 299
 300         if (ret)
 301                 return ret;
 302
 303         format->type = video->type;
 304         return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
 305 }
 306
 307 static int
 308 isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh)
 309 {
 310         struct v4l2_format format;
 311         int ret;
 312
 313         memcpy(&format, &vfh->format, sizeof(format));
 314         ret = __isp_video_get_format(video, &format);
 315         if (ret < 0)
 316                 return ret;
 317
 318         if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat ||
 319             vfh->format.fmt.pix.height != format.fmt.pix.height ||
 320             vfh->format.fmt.pix.width != format.fmt.pix.width ||
 321             vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline ||
 322             vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage)
 323                 return -EINVAL;
 324
 325         return ret;
 326 }
 327
 328 /* -----------------------------------------------------------------------------
 329  * IOMMU management
 330  */
 331
 332 #define IOMMU_FLAG      (IOVMF_ENDIAN_LITTLE | IOVMF_ELSZ_8)
 333
 334 /*
 335  * ispmmu_vmap - Wrapper for Virtual memory mapping of a scatter gather list
 336  * @dev: Device pointer specific to the OMAP3 ISP.
 337  * @sglist: Pointer to source Scatter gather list to allocate.
 338  * @sglen: Number of elements of the scatter-gatter list.
 339  *
 340  * Returns a resulting mapped device address by the ISP MMU, or -ENOMEM if
 341  * we ran out of memory.
 342  */
 343 static dma_addr_t
 344 ispmmu_vmap(struct isp_device *isp, const struct scatterlist *sglist, int sglen)
 345 {
 346         struct sg_table *sgt;
 347         u32 da;
 348
 349         sgt = kmalloc(sizeof(*sgt), GFP_KERNEL);
 350         if (sgt == NULL)
 351                 return -ENOMEM;
 352
 353         sgt->sgl = (struct scatterlist *)sglist;
 354         sgt->nents = sglen;
 355         sgt->orig_nents = sglen;
 356
 357         da = omap_iommu_vmap(isp->domain, isp->dev, 0, sgt, IOMMU_FLAG);
 358         if (IS_ERR_VALUE(da))
 359                 kfree(sgt);
 360
 361         return da;
 362 }
 363
 364 /*
 365  * ispmmu_vunmap - Unmap a device address from the ISP MMU
 366  * @dev: Device pointer specific to the OMAP3 ISP.
 367  * @da: Device address generated from a ispmmu_vmap call.
 368  */
 369 static void ispmmu_vunmap(struct isp_device *isp, dma_addr_t da)
 370 {
 371         struct sg_table *sgt;
 372
 373         sgt = omap_iommu_vunmap(isp->domain, isp->dev, (u32)da);
 374         kfree(sgt);
 375 }
 376
 377 /* -----------------------------------------------------------------------------
 378  * Video queue operations
 379  */
 380
 381 static void isp_video_queue_prepare(struct isp_video_queue *queue,
 382                                     unsigned int *nbuffers, unsigned int *size)
 383 {
 384         struct isp_video_fh *vfh =
 385                 container_of(queue, struct isp_video_fh, queue);
 386         struct isp_video *video = vfh->video;
 387
 388         *size = vfh->format.fmt.pix.sizeimage;
 389         if (*size == 0)
 390                 return;
 391
 392         *nbuffers = min(*nbuffers, video->capture_mem / PAGE_ALIGN(*size));
 393 }
 394
 395 static void isp_video_buffer_cleanup(struct isp_video_buffer *buf)
 396 {
 397         struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
 398         struct isp_buffer *buffer = to_isp_buffer(buf);
 399         struct isp_video *video = vfh->video;
 400
 401         if (buffer->isp_addr) {
 402                 ispmmu_vunmap(video->isp, buffer->isp_addr);
 403                 buffer->isp_addr = 0;
 404         }
 405 }
 406
 407 static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
 408 {
 409         struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
 410         struct isp_buffer *buffer = to_isp_buffer(buf);
 411         struct isp_video *video = vfh->video;
 412         unsigned long addr;
 413
 414         /* Refuse to prepare the buffer is the video node has registered an
 415          * error. We don't need to take any lock here as the operation is
 416          * inherently racy. The authoritative check will be performed in the
 417          * queue handler, which can't return an error, this check is just a best
 418          * effort to notify userspace as early as possible.
 419          */
 420         if (unlikely(video->error))
 421                 return -EIO;
 422
 423         addr = ispmmu_vmap(video->isp, buf->sglist, buf->sglen);
 424         if (IS_ERR_VALUE(addr))
 425                 return -EIO;
 426
 427         if (!IS_ALIGNED(addr, 32)) {
 428                 dev_dbg(video->isp->dev, "Buffer address must be "
 429                         "aligned to 32 bytes boundary.\n");
 430                 ispmmu_vunmap(video->isp, buffer->isp_addr);
 431                 return -EINVAL;
 432         }
 433
 434         buf->vbuf.bytesused = vfh->format.fmt.pix.sizeimage;
 435         buffer->isp_addr = addr;
 436         return 0;
 437 }
 438
 439 /*
 440  * isp_video_buffer_queue - Add buffer to streaming queue
 441  * @buf: Video buffer
 442  *
 443  * In memory-to-memory mode, start streaming on the pipeline if buffers are
 444  * queued on both the input and the output, if the pipeline isn't already busy.
 445  * If the pipeline is busy, it will be restarted in the output module interrupt
 446  * handler.
 447  */
 448 static void isp_video_buffer_queue(struct isp_video_buffer *buf)
 449 {
 450         struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
 451         struct isp_buffer *buffer = to_isp_buffer(buf);
 452         struct isp_video *video = vfh->video;
 453         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 454         enum isp_pipeline_state state;
 455         unsigned long flags;
 456         unsigned int empty;
 457         unsigned int start;
 458
 459         if (unlikely(video->error)) {
 460                 buf->state = ISP_BUF_STATE_ERROR;
 461                 wake_up(&buf->wait);
 462                 return;
 463         }
 464
 465         empty = list_empty(&video->dmaqueue);
 466         list_add_tail(&buffer->buffer.irqlist, &video->dmaqueue);
 467
 468         if (empty) {
 469                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 470                         state = ISP_PIPELINE_QUEUE_OUTPUT;
 471                 else
 472                         state = ISP_PIPELINE_QUEUE_INPUT;
 473
 474                 spin_lock_irqsave(&pipe->lock, flags);
 475                 pipe->state |= state;
 476                 video->ops->queue(video, buffer);
 477                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 478
 479                 start = isp_pipeline_ready(pipe);
 480                 if (start)
 481                         pipe->state |= ISP_PIPELINE_STREAM;
 482                 spin_unlock_irqrestore(&pipe->lock, flags);
 483
 484                 if (start)
 485                         omap3isp_pipeline_set_stream(pipe,
 486                                                 ISP_PIPELINE_STREAM_SINGLESHOT);
 487         }
 488 }
 489
 490 static const struct isp_video_queue_operations isp_video_queue_ops = {
 491         .queue_prepare = &isp_video_queue_prepare,
 492         .buffer_prepare = &isp_video_buffer_prepare,
 493         .buffer_queue = &isp_video_buffer_queue,
 494         .buffer_cleanup = &isp_video_buffer_cleanup,
 495 };
 496
 497 /*
 498  * omap3isp_video_buffer_next - Complete the current buffer and return the next
 499  * @video: ISP video object
 500  *
 501  * Remove the current video buffer from the DMA queue and fill its timestamp,
 502  * field count and state fields before waking up its completion handler.
 503  *
 504  * For capture video nodes the buffer state is set to ISP_BUF_STATE_DONE if no
 505  * error has been flagged in the pipeline, or to ISP_BUF_STATE_ERROR otherwise.
 506  * For video output nodes the buffer state is always set to ISP_BUF_STATE_DONE.
 507  *
 508  * The DMA queue is expected to contain at least one buffer.
 509  *
 510  * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
 511  * empty.
 512  */
 513 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
 514 {
 515         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 516         struct isp_video_queue *queue = video->queue;
 517         enum isp_pipeline_state state;
 518         struct isp_video_buffer *buf;
 519         unsigned long flags;
 520         struct timespec ts;
 521
 522         spin_lock_irqsave(&queue->irqlock, flags);
 523         if (WARN_ON(list_empty(&video->dmaqueue))) {
 524                 spin_unlock_irqrestore(&queue->irqlock, flags);
 525                 return NULL;
 526         }
 527
 528         buf = list_first_entry(&video->dmaqueue, struct isp_video_buffer,
 529                                irqlist);
 530         list_del(&buf->irqlist);
 531         spin_unlock_irqrestore(&queue->irqlock, flags);
 532
 533         ktime_get_ts(&ts);
 534         buf->vbuf.timestamp.tv_sec = ts.tv_sec;
 535         buf->vbuf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
 536
 537         /* Do frame number propagation only if this is the output video node.
 538          * Frame number either comes from the CSI receivers or it gets
 539          * incremented here if H3A is not active.
 540          * Note: There is no guarantee that the output buffer will finish
 541          * first, so the input number might lag behind by 1 in some cases.
 542          */
 543         if (video == pipe->output && !pipe->do_propagation)
 544                 buf->vbuf.sequence = atomic_inc_return(&pipe->frame_number);
 545         else
 546                 buf->vbuf.sequence = atomic_read(&pipe->frame_number);
 547
 548         /* Report pipeline errors to userspace on the capture device side. */
 549         if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
 550                 buf->state = ISP_BUF_STATE_ERROR;
 551                 pipe->error = false;
 552         } else {
 553                 buf->state = ISP_BUF_STATE_DONE;
 554         }
 555
 556         wake_up(&buf->wait);
 557
 558         if (list_empty(&video->dmaqueue)) {
 559                 if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 560                         state = ISP_PIPELINE_QUEUE_OUTPUT
 561                               | ISP_PIPELINE_STREAM;
 562                 else
 563                         state = ISP_PIPELINE_QUEUE_INPUT
 564                               | ISP_PIPELINE_STREAM;
 565
 566                 spin_lock_irqsave(&pipe->lock, flags);
 567                 pipe->state &= ~state;
 568                 if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS)
 569                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 570                 spin_unlock_irqrestore(&pipe->lock, flags);
 571                 return NULL;
 572         }
 573
 574         if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
 575                 spin_lock_irqsave(&pipe->lock, flags);
 576                 pipe->state &= ~ISP_PIPELINE_STREAM;
 577                 spin_unlock_irqrestore(&pipe->lock, flags);
 578         }
 579
 580         buf = list_first_entry(&video->dmaqueue, struct isp_video_buffer,
 581                                irqlist);
 582         buf->state = ISP_BUF_STATE_ACTIVE;
 583         return to_isp_buffer(buf);
 584 }
 585
 586 /*
 587  * omap3isp_video_cancel_stream - Cancel stream on a video node
 588  * @video: ISP video object
 589  *
 590  * Cancelling a stream mark all buffers on the video node as erroneous and makes
 591  * sure no new buffer can be queued.
 592  */
 593 void omap3isp_video_cancel_stream(struct isp_video *video)
 594 {
 595         struct isp_video_queue *queue = video->queue;
 596         unsigned long flags;
 597
 598         spin_lock_irqsave(&queue->irqlock, flags);
 599
 600         while (!list_empty(&video->dmaqueue)) {
 601                 struct isp_video_buffer *buf;
 602
 603                 buf = list_first_entry(&video->dmaqueue,
 604                                        struct isp_video_buffer, irqlist);
 605                 list_del(&buf->irqlist);
 606
 607                 buf->state = ISP_BUF_STATE_ERROR;
 608                 wake_up(&buf->wait);
 609         }
 610
 611         video->error = true;
 612
 613         spin_unlock_irqrestore(&queue->irqlock, flags);
 614 }
 615
 616 /*
 617  * omap3isp_video_resume - Perform resume operation on the buffers
 618  * @video: ISP video object
 619  * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise
 620  *
 621  * This function is intended to be used on suspend/resume scenario. It
 622  * requests video queue layer to discard buffers marked as DONE if it's in
 623  * continuous mode and requests ISP modules to queue again the ACTIVE buffer
 624  * if there's any.
 625  */
 626 void omap3isp_video_resume(struct isp_video *video, int continuous)
 627 {
 628         struct isp_buffer *buf = NULL;
 629
 630         if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 631                 omap3isp_video_queue_discard_done(video->queue);
 632
 633         if (!list_empty(&video->dmaqueue)) {
 634                 buf = list_first_entry(&video->dmaqueue,
 635                                        struct isp_buffer, buffer.irqlist);
 636                 video->ops->queue(video, buf);
 637                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 638         } else {
 639                 if (continuous)
 640                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 641         }
 642 }
 643
 644 /* -----------------------------------------------------------------------------
 645  * V4L2 ioctls
 646  */
 647
 648 static int
 649 isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 650 {
 651         struct isp_video *video = video_drvdata(file);
 652
 653         strlcpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver));
 654         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 655         strlcpy(cap->bus_info, "media", sizeof(cap->bus_info));
 656
 657         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 658                 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 659         else
 660                 cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 661
 662         return 0;
 663 }
 664
 665 static int
 666 isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 667 {
 668         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 669         struct isp_video *video = video_drvdata(file);
 670
 671         if (format->type != video->type)
 672                 return -EINVAL;
 673
 674         mutex_lock(&video->mutex);
 675         *format = vfh->format;
 676         mutex_unlock(&video->mutex);
 677
 678         return 0;
 679 }
 680
 681 static int
 682 isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 683 {
 684         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 685         struct isp_video *video = video_drvdata(file);
 686         struct v4l2_mbus_framefmt fmt;
 687
 688         if (format->type != video->type)
 689                 return -EINVAL;
 690
 691         mutex_lock(&video->mutex);
 692
 693         /* Fill the bytesperline and sizeimage fields by converting to media bus
 694          * format and back to pixel format.
 695          */
 696         isp_video_pix_to_mbus(&format->fmt.pix, &fmt);
 697         isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
 698
 699         vfh->format = *format;
 700
 701         mutex_unlock(&video->mutex);
 702         return 0;
 703 }
 704
 705 static int
 706 isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 707 {
 708         struct isp_video *video = video_drvdata(file);
 709         struct v4l2_subdev_format fmt;
 710         struct v4l2_subdev *subdev;
 711         u32 pad;
 712         int ret;
 713
 714         if (format->type != video->type)
 715                 return -EINVAL;
 716
 717         subdev = isp_video_remote_subdev(video, &pad);
 718         if (subdev == NULL)
 719                 return -EINVAL;
 720
 721         isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
 722
 723         fmt.pad = pad;
 724         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 725         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 726         if (ret)
 727                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 728
 729         isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
 730         return 0;
 731 }
 732
 733 static int
 734 isp_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap)
 735 {
 736         struct isp_video *video = video_drvdata(file);
 737         struct v4l2_subdev *subdev;
 738         int ret;
 739
 740         subdev = isp_video_remote_subdev(video, NULL);
 741         if (subdev == NULL)
 742                 return -EINVAL;
 743
 744         mutex_lock(&video->mutex);
 745         ret = v4l2_subdev_call(subdev, video, cropcap, cropcap);
 746         mutex_unlock(&video->mutex);
 747
 748         return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 749 }
 750
 751 static int
 752 isp_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop)
 753 {
 754         struct isp_video *video = video_drvdata(file);
 755         struct v4l2_subdev_format format;
 756         struct v4l2_subdev *subdev;
 757         u32 pad;
 758         int ret;
 759
 760         subdev = isp_video_remote_subdev(video, &pad);
 761         if (subdev == NULL)
 762                 return -EINVAL;
 763
 764         /* Try the get crop operation first and fallback to get format if not
 765          * implemented.
 766          */
 767         ret = v4l2_subdev_call(subdev, video, g_crop, crop);
 768         if (ret != -ENOIOCTLCMD)
 769                 return ret;
 770
 771         format.pad = pad;
 772         format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 773         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
 774         if (ret < 0)
 775                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 776
 777         crop->c.left = 0;
 778         crop->c.top = 0;
 779         crop->c.width = format.format.width;
 780         crop->c.height = format.format.height;
 781
 782         return 0;
 783 }
 784
 785 static int
 786 isp_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
 787 {
 788         struct isp_video *video = video_drvdata(file);
 789         struct v4l2_subdev *subdev;
 790         int ret;
 791
 792         subdev = isp_video_remote_subdev(video, NULL);
 793         if (subdev == NULL)
 794                 return -EINVAL;
 795
 796         mutex_lock(&video->mutex);
 797         ret = v4l2_subdev_call(subdev, video, s_crop, crop);
 798         mutex_unlock(&video->mutex);
 799
 800         return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 801 }
 802
 803 static int
 804 isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 805 {
 806         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 807         struct isp_video *video = video_drvdata(file);
 808
 809         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 810             video->type != a->type)
 811                 return -EINVAL;
 812
 813         memset(a, 0, sizeof(*a));
 814         a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 815         a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
 816         a->parm.output.timeperframe = vfh->timeperframe;
 817
 818         return 0;
 819 }
 820
 821 static int
 822 isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 823 {
 824         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 825         struct isp_video *video = video_drvdata(file);
 826
 827         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 828             video->type != a->type)
 829                 return -EINVAL;
 830
 831         if (a->parm.output.timeperframe.denominator == 0)
 832                 a->parm.output.timeperframe.denominator = 1;
 833
 834         vfh->timeperframe = a->parm.output.timeperframe;
 835
 836         return 0;
 837 }
 838
 839 static int
 840 isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
 841 {
 842         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 843
 844         return omap3isp_video_queue_reqbufs(&vfh->queue, rb);
 845 }
 846
 847 static int
 848 isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
 849 {
 850         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 851
 852         return omap3isp_video_queue_querybuf(&vfh->queue, b);
 853 }
 854
 855 static int
 856 isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 857 {
 858         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 859
 860         return omap3isp_video_queue_qbuf(&vfh->queue, b);
 861 }
 862
 863 static int
 864 isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 865 {
 866         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 867
 868         return omap3isp_video_queue_dqbuf(&vfh->queue, b,
 869                                           file->f_flags & O_NONBLOCK);
 870 }
 871
 872 static int isp_video_check_external_subdevs(struct isp_video *video,
 873                                             struct isp_pipeline *pipe)
 874 {
 875         struct isp_device *isp = video->isp;
 876         struct media_entity *ents[] = {
 877                 &isp->isp_csi2a.subdev.entity,
 878                 &isp->isp_csi2c.subdev.entity,
 879                 &isp->isp_ccp2.subdev.entity,
 880                 &isp->isp_ccdc.subdev.entity
 881         };
 882         struct media_pad *source_pad;
 883         struct media_entity *source = NULL;
 884         struct media_entity *sink;
 885         struct v4l2_subdev_format fmt;
 886         struct v4l2_ext_controls ctrls;
 887         struct v4l2_ext_control ctrl;
 888         unsigned int i;
 889         int ret;
 890
 891         /* Memory-to-memory pipelines have no external subdev. */
 892         if (pipe->input != NULL)
 893                 return 0;
 894
 895         for (i = 0; i < ARRAY_SIZE(ents); i++) {
 896                 /* Is the entity part of the pipeline? */
 897                 if (!(pipe->entities & (1 << ents[i]->id)))
 898                         continue;
 899
 900                 /* ISP entities have always sink pad == 0. Find source. */
 901                 source_pad = media_entity_remote_pad(&ents[i]->pads[0]);
 902                 if (source_pad == NULL)
 903                         continue;
 904
 905                 source = source_pad->entity;
 906                 sink = ents[i];
 907                 break;
 908         }
 909
 910         if (!source) {
 911                 dev_warn(isp->dev, "can't find source, failing now\n");
 912                 return -EINVAL;
 913         }
 914
 915         if (media_entity_type(source) != MEDIA_ENT_T_V4L2_SUBDEV)
 916                 return 0;
 917
 918         pipe->external = media_entity_to_v4l2_subdev(source);
 919
 920         fmt.pad = source_pad->index;
 921         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 922         ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink),
 923                                pad, get_fmt, NULL, &fmt);
 924         if (unlikely(ret < 0)) {
 925                 dev_warn(isp->dev, "get_fmt returned null!\n");
 926                 return ret;
 927         }
 928
 929         pipe->external_width =
 930                 omap3isp_video_format_info(fmt.format.code)->width;
 931
 932         memset(&ctrls, 0, sizeof(ctrls));
 933         memset(&ctrl, 0, sizeof(ctrl));
 934
 935         ctrl.id = V4L2_CID_PIXEL_RATE;
 936
 937         ctrls.count = 1;
 938         ctrls.controls = &ctrl;
 939
 940         ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &ctrls);
 941         if (ret < 0) {
 942                 dev_warn(isp->dev, "no pixel rate control in subdev %s\n",
 943                          pipe->external->name);
 944                 return ret;
 945         }
 946
 947         pipe->external_rate = ctrl.value64;
 948
 949         if (pipe->entities & (1 << isp->isp_ccdc.subdev.entity.id)) {
 950                 unsigned int rate = UINT_MAX;
 951                 /*
 952                  * Check that maximum allowed CCDC pixel rate isn't
 953                  * exceeded by the pixel rate.
 954                  */
 955                 omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate);
 956                 if (pipe->external_rate > rate)
 957                         return -ENOSPC;
 958         }
 959
 960         return 0;
 961 }
 962
 963 /*
 964  * Stream management
 965  *
 966  * Every ISP pipeline has a single input and a single output. The input can be
 967  * either a sensor or a video node. The output is always a video node.
 968  *
 969  * As every pipeline has an output video node, the ISP video objects at the
 970  * pipeline output stores the pipeline state. It tracks the streaming state of
 971  * both the input and output, as well as the availability of buffers.
 972  *
 973  * In sensor-to-memory mode, frames are always available at the pipeline input.
 974  * Starting the sensor usually requires I2C transfers and must be done in
 975  * interruptible context. The pipeline is started and stopped synchronously
 976  * to the stream on/off commands. All modules in the pipeline will get their
 977  * subdev set stream handler called. The module at the end of the pipeline must
 978  * delay starting the hardware until buffers are available at its output.
 979  *
 980  * In memory-to-memory mode, starting/stopping the stream requires
 981  * synchronization between the input and output. ISP modules can't be stopped
 982  * in the middle of a frame, and at least some of the modules seem to become
 983  * busy as soon as they're started, even if they don't receive a frame start
 984  * event. For that reason frames need to be processed in single-shot mode. The
 985  * driver needs to wait until a frame is completely processed and written to
 986  * memory before restarting the pipeline for the next frame. Pipelined
 987  * processing might be possible but requires more testing.
 988  *
 989  * Stream start must be delayed until buffers are available at both the input
 990  * and output. The pipeline must be started in the videobuf queue callback with
 991  * the buffers queue spinlock held. The modules subdev set stream operation must
 992  * not sleep.
 993  */
 994 static int
 995 isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 996 {
 997         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 998         struct isp_video *video = video_drvdata(file);
 999         enum isp_pipeline_state state;
1000         struct isp_pipeline *pipe;
1001         unsigned long flags;
1002         int ret;
1003
1004         if (type != video->type)
1005                 return -EINVAL;
1006
1007         mutex_lock(&video->stream_lock);
1008
1009         if (video->streaming) {
1010                 mutex_unlock(&video->stream_lock);
1011                 return -EBUSY;
1012         }
1013
1014         /* Start streaming on the pipeline. No link touching an entity in the
1015          * pipeline can be activated or deactivated once streaming is started.
1016          */
1017         pipe = video->video.entity.pipe
1018              ? to_isp_pipeline(&video->video.entity) : &video->pipe;
1019
1020         pipe->entities = 0;
1021
1022         if (video->isp->pdata->set_constraints)
1023                 video->isp->pdata->set_constraints(video->isp, true);
1024         pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]);
1025         pipe->max_rate = pipe->l3_ick;
1026
1027         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
1028         if (ret < 0)
1029                 goto err_pipeline_start;
1030
1031         /* Verify that the currently configured format matches the output of
1032          * the connected subdev.
1033          */
1034         ret = isp_video_check_format(video, vfh);
1035         if (ret < 0)
1036                 goto err_check_format;
1037
1038         video->bpl_padding = ret;
1039         video->bpl_value = vfh->format.fmt.pix.bytesperline;
1040
1041         ret = isp_video_get_graph_data(video, pipe);
1042         if (ret < 0)
1043                 goto err_check_format;
1044
1045         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1046                 state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT;
1047         else
1048                 state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT;
1049
1050         ret = isp_video_check_external_subdevs(video, pipe);
1051         if (ret < 0)
1052                 goto err_check_format;
1053
1054         pipe->error = false;
1055
1056         spin_lock_irqsave(&pipe->lock, flags);
1057         pipe->state &= ~ISP_PIPELINE_STREAM;
1058         pipe->state |= state;
1059         spin_unlock_irqrestore(&pipe->lock, flags);
1060
1061         /* Set the maximum time per frame as the value requested by userspace.
1062          * This is a soft limit that can be overridden if the hardware doesn't
1063          * support the request limit.
1064          */
1065         if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1066                 pipe->max_timeperframe = vfh->timeperframe;
1067
1068         video->queue = &vfh->queue;
1069         INIT_LIST_HEAD(&video->dmaqueue);
1070         atomic_set(&pipe->frame_number, -1);
1071
1072         ret = omap3isp_video_queue_streamon(&vfh->queue);
1073         if (ret < 0)
1074                 goto err_check_format;
1075
1076         /* In sensor-to-memory mode, the stream can be started synchronously
1077          * to the stream on command. In memory-to-memory mode, it will be
1078          * started when buffers are queued on both the input and output.
1079          */
1080         if (pipe->input == NULL) {
1081                 ret = omap3isp_pipeline_set_stream(pipe,
1082                                               ISP_PIPELINE_STREAM_CONTINUOUS);
1083                 if (ret < 0)
1084                         goto err_set_stream;
1085                 spin_lock_irqsave(&video->queue->irqlock, flags);
1086                 if (list_empty(&video->dmaqueue))
1087                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
1088                 spin_unlock_irqrestore(&video->queue->irqlock, flags);
1089         }
1090
1091         video->streaming = 1;
1092
1093         mutex_unlock(&video->stream_lock);
1094         return 0;
1095
1096 err_set_stream:
1097         omap3isp_video_queue_streamoff(&vfh->queue);
1098 err_check_format:
1099         media_entity_pipeline_stop(&video->video.entity);
1100 err_pipeline_start:
1101         if (video->isp->pdata->set_constraints)
1102                 video->isp->pdata->set_constraints(video->isp, false);
1103         /* The DMA queue must be emptied here, otherwise CCDC interrupts that
1104          * will get triggered the next time the CCDC is powered up will try to
1105          * access buffers that might have been freed but still present in the
1106          * DMA queue. This can easily get triggered if the above
1107          * omap3isp_pipeline_set_stream() call fails on a system with a
1108          * free-running sensor.
1109          */
1110         INIT_LIST_HEAD(&video->dmaqueue);
1111         video->queue = NULL;
1112
1113         mutex_unlock(&video->stream_lock);
1114         return ret;
1115 }
1116
1117 static int
1118 isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
1119 {
1120         struct isp_video_fh *vfh = to_isp_video_fh(fh);
1121         struct isp_video *video = video_drvdata(file);
1122         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
1123         enum isp_pipeline_state state;
1124         unsigned int streaming;
1125         unsigned long flags;
1126
1127         if (type != video->type)
1128                 return -EINVAL;
1129
1130         mutex_lock(&video->stream_lock);
1131
1132         /* Make sure we're not streaming yet. */
1133         mutex_lock(&vfh->queue.lock);
1134         streaming = vfh->queue.streaming;
1135         mutex_unlock(&vfh->queue.lock);
1136
1137         if (!streaming)
1138                 goto done;
1139
1140         /* Update the pipeline state. */
1141         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1142                 state = ISP_PIPELINE_STREAM_OUTPUT
1143                       | ISP_PIPELINE_QUEUE_OUTPUT;
1144         else
1145                 state = ISP_PIPELINE_STREAM_INPUT
1146                       | ISP_PIPELINE_QUEUE_INPUT;
1147
1148         spin_lock_irqsave(&pipe->lock, flags);
1149         pipe->state &= ~state;
1150         spin_unlock_irqrestore(&pipe->lock, flags);
1151
1152         /* Stop the stream. */
1153         omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED);
1154         omap3isp_video_queue_streamoff(&vfh->queue);
1155         video->queue = NULL;
1156         video->streaming = 0;
1157         video->error = false;
1158
1159         if (video->isp->pdata->set_constraints)
1160                 video->isp->pdata->set_constraints(video->isp, false);
1161         media_entity_pipeline_stop(&video->video.entity);
1162
1163 done:
1164         mutex_unlock(&video->stream_lock);
1165         return 0;
1166 }
1167
1168 static int
1169 isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
1170 {
1171         if (input->index > 0)
1172                 return -EINVAL;
1173
1174         strlcpy(input->name, "camera", sizeof(input->name));
1175         input->type = V4L2_INPUT_TYPE_CAMERA;
1176
1177         return 0;
1178 }
1179
1180 static int
1181 isp_video_g_input(struct file *file, void *fh, unsigned int *input)
1182 {
1183         *input = 0;
1184
1185         return 0;
1186 }
1187
1188 static int
1189 isp_video_s_input(struct file *file, void *fh, unsigned int input)
1190 {
1191         return input == 0 ? 0 : -EINVAL;
1192 }
1193
1194 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
1195         .vidioc_querycap                = isp_video_querycap,
1196         .vidioc_g_fmt_vid_cap           = isp_video_get_format,
1197         .vidioc_s_fmt_vid_cap           = isp_video_set_format,
1198         .vidioc_try_fmt_vid_cap         = isp_video_try_format,
1199         .vidioc_g_fmt_vid_out           = isp_video_get_format,
1200         .vidioc_s_fmt_vid_out           = isp_video_set_format,
1201         .vidioc_try_fmt_vid_out         = isp_video_try_format,
1202         .vidioc_cropcap                 = isp_video_cropcap,
1203         .vidioc_g_crop                  = isp_video_get_crop,
1204         .vidioc_s_crop                  = isp_video_set_crop,
1205         .vidioc_g_parm                  = isp_video_get_param,
1206         .vidioc_s_parm                  = isp_video_set_param,
1207         .vidioc_reqbufs                 = isp_video_reqbufs,
1208         .vidioc_querybuf                = isp_video_querybuf,
1209         .vidioc_qbuf                    = isp_video_qbuf,
1210         .vidioc_dqbuf                   = isp_video_dqbuf,
1211         .vidioc_streamon                = isp_video_streamon,
1212         .vidioc_streamoff               = isp_video_streamoff,
1213         .vidioc_enum_input              = isp_video_enum_input,
1214         .vidioc_g_input                 = isp_video_g_input,
1215         .vidioc_s_input                 = isp_video_s_input,
1216 };
1217
1218 /* -----------------------------------------------------------------------------
1219  * V4L2 file operations
1220  */
1221
1222 static int isp_video_open(struct file *file)
1223 {
1224         struct isp_video *video = video_drvdata(file);
1225         struct isp_video_fh *handle;
1226         int ret = 0;
1227
1228         handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1229         if (handle == NULL)
1230                 return -ENOMEM;
1231
1232         v4l2_fh_init(&handle->vfh, &video->video);
1233         v4l2_fh_add(&handle->vfh);
1234
1235         /* If this is the first user, initialise the pipeline. */
1236         if (omap3isp_get(video->isp) == NULL) {
1237                 ret = -EBUSY;
1238                 goto done;
1239         }
1240
1241         ret = omap3isp_pipeline_pm_use(&video->video.entity, 1);
1242         if (ret < 0) {
1243                 omap3isp_put(video->isp);
1244                 goto done;
1245         }
1246
1247         omap3isp_video_queue_init(&handle->queue, video->type,
1248                                   &isp_video_queue_ops, video->isp->dev,
1249                                   sizeof(struct isp_buffer));
1250
1251         memset(&handle->format, 0, sizeof(handle->format));
1252         handle->format.type = video->type;
1253         handle->timeperframe.denominator = 1;
1254
1255         handle->video = video;
1256         file->private_data = &handle->vfh;
1257
1258 done:
1259         if (ret < 0) {
1260                 v4l2_fh_del(&handle->vfh);
1261                 kfree(handle);
1262         }
1263
1264         return ret;
1265 }
1266
1267 static int isp_video_release(struct file *file)
1268 {
1269         struct isp_video *video = video_drvdata(file);
1270         struct v4l2_fh *vfh = file->private_data;
1271         struct isp_video_fh *handle = to_isp_video_fh(vfh);
1272
1273         /* Disable streaming and free the buffers queue resources. */
1274         isp_video_streamoff(file, vfh, video->type);
1275
1276         mutex_lock(&handle->queue.lock);
1277         omap3isp_video_queue_cleanup(&handle->queue);
1278         mutex_unlock(&handle->queue.lock);
1279
1280         omap3isp_pipeline_pm_use(&video->video.entity, 0);
1281
1282         /* Release the file handle. */
1283         v4l2_fh_del(vfh);
1284         kfree(handle);
1285         file->private_data = NULL;
1286
1287         omap3isp_put(video->isp);
1288
1289         return 0;
1290 }
1291
1292 static unsigned int isp_video_poll(struct file *file, poll_table *wait)
1293 {
1294         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1295         struct isp_video_queue *queue = &vfh->queue;
1296
1297         return omap3isp_video_queue_poll(queue, file, wait);
1298 }
1299
1300 static int isp_video_mmap(struct file *file, struct vm_area_struct *vma)
1301 {
1302         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1303
1304         return omap3isp_video_queue_mmap(&vfh->queue, vma);
1305 }
1306
1307 static struct v4l2_file_operations isp_video_fops = {
1308         .owner = THIS_MODULE,
1309         .unlocked_ioctl = video_ioctl2,
1310         .open = isp_video_open,
1311         .release = isp_video_release,
1312         .poll = isp_video_poll,
1313         .mmap = isp_video_mmap,
1314 };
1315
1316 /* -----------------------------------------------------------------------------
1317  * ISP video core
1318  */
1319
1320 static const struct isp_video_operations isp_video_dummy_ops = {
1321 };
1322
1323 int omap3isp_video_init(struct isp_video *video, const char *name)
1324 {
1325         const char *direction;
1326         int ret;
1327
1328         switch (video->type) {
1329         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1330                 direction = "output";
1331                 video->pad.flags = MEDIA_PAD_FL_SINK
1332                                    | MEDIA_PAD_FL_MUST_CONNECT;
1333                 break;
1334         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1335                 direction = "input";
1336                 video->pad.flags = MEDIA_PAD_FL_SOURCE
1337                                    | MEDIA_PAD_FL_MUST_CONNECT;
1338                 video->video.vfl_dir = VFL_DIR_TX;
1339                 break;
1340
1341         default:
1342                 return -EINVAL;
1343         }
1344
1345         ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1346         if (ret < 0)
1347                 return ret;
1348
1349         mutex_init(&video->mutex);
1350         atomic_set(&video->active, 0);
1351
1352         spin_lock_init(&video->pipe.lock);
1353         mutex_init(&video->stream_lock);
1354
1355         /* Initialize the video device. */
1356         if (video->ops == NULL)
1357                 video->ops = &isp_video_dummy_ops;
1358
1359         video->video.fops = &isp_video_fops;
1360         snprintf(video->video.name, sizeof(video->video.name),
1361                  "OMAP3 ISP %s %s", name, direction);
1362         video->video.vfl_type = VFL_TYPE_GRABBER;
1363         video->video.release = video_device_release_empty;
1364         video->video.ioctl_ops = &isp_video_ioctl_ops;
1365         video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED;
1366
1367         video_set_drvdata(&video->video, video);
1368
1369         return 0;
1370 }
1371
1372 void omap3isp_video_cleanup(struct isp_video *video)
1373 {
1374         media_entity_cleanup(&video->video.entity);
1375         mutex_destroy(&video->stream_lock);
1376         mutex_destroy(&video->mutex);
1377 }
1378
1379 int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev)
1380 {
1381         int ret;
1382
1383         video->video.v4l2_dev = vdev;
1384
1385         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1386         if (ret < 0)
1387                 dev_err(video->isp->dev,
1388                         "%s: could not register video device (%d)\n",
1389                         __func__, ret);
1390
1391         return ret;
1392 }
1393
1394 void omap3isp_video_unregister(struct isp_video *video)
1395 {
1396         if (video_is_registered(&video->video))
1397                 video_unregister_device(&video->video);
1398 }