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         mutex_lock(&video->mutex);
 294
 295         fmt.pad = pad;
 296         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 297         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 298         if (ret == -ENOIOCTLCMD)
 299                 ret = -EINVAL;
 300
 301         mutex_unlock(&video->mutex);
 302
 303         if (ret)
 304                 return ret;
 305
 306         format->type = video->type;
 307         return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
 308 }
 309
 310 static int
 311 isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh)
 312 {
 313         struct v4l2_format format;
 314         int ret;
 315
 316         memcpy(&format, &vfh->format, sizeof(format));
 317         ret = __isp_video_get_format(video, &format);
 318         if (ret < 0)
 319                 return ret;
 320
 321         if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat ||
 322             vfh->format.fmt.pix.height != format.fmt.pix.height ||
 323             vfh->format.fmt.pix.width != format.fmt.pix.width ||
 324             vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline ||
 325             vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage)
 326                 return -EINVAL;
 327
 328         return ret;
 329 }
 330
 331 /* -----------------------------------------------------------------------------
 332  * IOMMU management
 333  */
 334
 335 #define IOMMU_FLAG      (IOVMF_ENDIAN_LITTLE | IOVMF_ELSZ_8)
 336
 337 /*
 338  * ispmmu_vmap - Wrapper for Virtual memory mapping of a scatter gather list
 339  * @dev: Device pointer specific to the OMAP3 ISP.
 340  * @sglist: Pointer to source Scatter gather list to allocate.
 341  * @sglen: Number of elements of the scatter-gatter list.
 342  *
 343  * Returns a resulting mapped device address by the ISP MMU, or -ENOMEM if
 344  * we ran out of memory.
 345  */
 346 static dma_addr_t
 347 ispmmu_vmap(struct isp_device *isp, const struct scatterlist *sglist, int sglen)
 348 {
 349         struct sg_table *sgt;
 350         u32 da;
 351
 352         sgt = kmalloc(sizeof(*sgt), GFP_KERNEL);
 353         if (sgt == NULL)
 354                 return -ENOMEM;
 355
 356         sgt->sgl = (struct scatterlist *)sglist;
 357         sgt->nents = sglen;
 358         sgt->orig_nents = sglen;
 359
 360         da = omap_iommu_vmap(isp->domain, isp->dev, 0, sgt, IOMMU_FLAG);
 361         if (IS_ERR_VALUE(da))
 362                 kfree(sgt);
 363
 364         return da;
 365 }
 366
 367 /*
 368  * ispmmu_vunmap - Unmap a device address from the ISP MMU
 369  * @dev: Device pointer specific to the OMAP3 ISP.
 370  * @da: Device address generated from a ispmmu_vmap call.
 371  */
 372 static void ispmmu_vunmap(struct isp_device *isp, dma_addr_t da)
 373 {
 374         struct sg_table *sgt;
 375
 376         sgt = omap_iommu_vunmap(isp->domain, isp->dev, (u32)da);
 377         kfree(sgt);
 378 }
 379
 380 /* -----------------------------------------------------------------------------
 381  * Video queue operations
 382  */
 383
 384 static void isp_video_queue_prepare(struct isp_video_queue *queue,
 385                                     unsigned int *nbuffers, unsigned int *size)
 386 {
 387         struct isp_video_fh *vfh =
 388                 container_of(queue, struct isp_video_fh, queue);
 389         struct isp_video *video = vfh->video;
 390
 391         *size = vfh->format.fmt.pix.sizeimage;
 392         if (*size == 0)
 393                 return;
 394
 395         *nbuffers = min(*nbuffers, video->capture_mem / PAGE_ALIGN(*size));
 396 }
 397
 398 static void isp_video_buffer_cleanup(struct isp_video_buffer *buf)
 399 {
 400         struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
 401         struct isp_buffer *buffer = to_isp_buffer(buf);
 402         struct isp_video *video = vfh->video;
 403
 404         if (buffer->isp_addr) {
 405                 ispmmu_vunmap(video->isp, buffer->isp_addr);
 406                 buffer->isp_addr = 0;
 407         }
 408 }
 409
 410 static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
 411 {
 412         struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
 413         struct isp_buffer *buffer = to_isp_buffer(buf);
 414         struct isp_video *video = vfh->video;
 415         unsigned long addr;
 416
 417         addr = ispmmu_vmap(video->isp, buf->sglist, buf->sglen);
 418         if (IS_ERR_VALUE(addr))
 419                 return -EIO;
 420
 421         if (!IS_ALIGNED(addr, 32)) {
 422                 dev_dbg(video->isp->dev, "Buffer address must be "
 423                         "aligned to 32 bytes boundary.\n");
 424                 ispmmu_vunmap(video->isp, buffer->isp_addr);
 425                 return -EINVAL;
 426         }
 427
 428         buf->vbuf.bytesused = vfh->format.fmt.pix.sizeimage;
 429         buffer->isp_addr = addr;
 430         return 0;
 431 }
 432
 433 /*
 434  * isp_video_buffer_queue - Add buffer to streaming queue
 435  * @buf: Video buffer
 436  *
 437  * In memory-to-memory mode, start streaming on the pipeline if buffers are
 438  * queued on both the input and the output, if the pipeline isn't already busy.
 439  * If the pipeline is busy, it will be restarted in the output module interrupt
 440  * handler.
 441  */
 442 static void isp_video_buffer_queue(struct isp_video_buffer *buf)
 443 {
 444         struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
 445         struct isp_buffer *buffer = to_isp_buffer(buf);
 446         struct isp_video *video = vfh->video;
 447         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 448         enum isp_pipeline_state state;
 449         unsigned long flags;
 450         unsigned int empty;
 451         unsigned int start;
 452
 453         empty = list_empty(&video->dmaqueue);
 454         list_add_tail(&buffer->buffer.irqlist, &video->dmaqueue);
 455
 456         if (empty) {
 457                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 458                         state = ISP_PIPELINE_QUEUE_OUTPUT;
 459                 else
 460                         state = ISP_PIPELINE_QUEUE_INPUT;
 461
 462                 spin_lock_irqsave(&pipe->lock, flags);
 463                 pipe->state |= state;
 464                 video->ops->queue(video, buffer);
 465                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 466
 467                 start = isp_pipeline_ready(pipe);
 468                 if (start)
 469                         pipe->state |= ISP_PIPELINE_STREAM;
 470                 spin_unlock_irqrestore(&pipe->lock, flags);
 471
 472                 if (start)
 473                         omap3isp_pipeline_set_stream(pipe,
 474                                                 ISP_PIPELINE_STREAM_SINGLESHOT);
 475         }
 476 }
 477
 478 static const struct isp_video_queue_operations isp_video_queue_ops = {
 479         .queue_prepare = &isp_video_queue_prepare,
 480         .buffer_prepare = &isp_video_buffer_prepare,
 481         .buffer_queue = &isp_video_buffer_queue,
 482         .buffer_cleanup = &isp_video_buffer_cleanup,
 483 };
 484
 485 /*
 486  * omap3isp_video_buffer_next - Complete the current buffer and return the next
 487  * @video: ISP video object
 488  *
 489  * Remove the current video buffer from the DMA queue and fill its timestamp,
 490  * field count and state fields before waking up its completion handler.
 491  *
 492  * For capture video nodes the buffer state is set to ISP_BUF_STATE_DONE if no
 493  * error has been flagged in the pipeline, or to ISP_BUF_STATE_ERROR otherwise.
 494  * For video output nodes the buffer state is always set to ISP_BUF_STATE_DONE.
 495  *
 496  * The DMA queue is expected to contain at least one buffer.
 497  *
 498  * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
 499  * empty.
 500  */
 501 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
 502 {
 503         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 504         struct isp_video_queue *queue = video->queue;
 505         enum isp_pipeline_state state;
 506         struct isp_video_buffer *buf;
 507         unsigned long flags;
 508         struct timespec ts;
 509
 510         spin_lock_irqsave(&queue->irqlock, flags);
 511         if (WARN_ON(list_empty(&video->dmaqueue))) {
 512                 spin_unlock_irqrestore(&queue->irqlock, flags);
 513                 return NULL;
 514         }
 515
 516         buf = list_first_entry(&video->dmaqueue, struct isp_video_buffer,
 517                                irqlist);
 518         list_del(&buf->irqlist);
 519         spin_unlock_irqrestore(&queue->irqlock, flags);
 520
 521         ktime_get_ts(&ts);
 522         buf->vbuf.timestamp.tv_sec = ts.tv_sec;
 523         buf->vbuf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
 524
 525         /* Do frame number propagation only if this is the output video node.
 526          * Frame number either comes from the CSI receivers or it gets
 527          * incremented here if H3A is not active.
 528          * Note: There is no guarantee that the output buffer will finish
 529          * first, so the input number might lag behind by 1 in some cases.
 530          */
 531         if (video == pipe->output && !pipe->do_propagation)
 532                 buf->vbuf.sequence = atomic_inc_return(&pipe->frame_number);
 533         else
 534                 buf->vbuf.sequence = atomic_read(&pipe->frame_number);
 535
 536         /* Report pipeline errors to userspace on the capture device side. */
 537         if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
 538                 buf->state = ISP_BUF_STATE_ERROR;
 539                 pipe->error = false;
 540         } else {
 541                 buf->state = ISP_BUF_STATE_DONE;
 542         }
 543
 544         wake_up(&buf->wait);
 545
 546         if (list_empty(&video->dmaqueue)) {
 547                 if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 548                         state = ISP_PIPELINE_QUEUE_OUTPUT
 549                               | ISP_PIPELINE_STREAM;
 550                 else
 551                         state = ISP_PIPELINE_QUEUE_INPUT
 552                               | ISP_PIPELINE_STREAM;
 553
 554                 spin_lock_irqsave(&pipe->lock, flags);
 555                 pipe->state &= ~state;
 556                 if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS)
 557                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 558                 spin_unlock_irqrestore(&pipe->lock, flags);
 559                 return NULL;
 560         }
 561
 562         if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
 563                 spin_lock_irqsave(&pipe->lock, flags);
 564                 pipe->state &= ~ISP_PIPELINE_STREAM;
 565                 spin_unlock_irqrestore(&pipe->lock, flags);
 566         }
 567
 568         buf = list_first_entry(&video->dmaqueue, struct isp_video_buffer,
 569                                irqlist);
 570         buf->state = ISP_BUF_STATE_ACTIVE;
 571         return to_isp_buffer(buf);
 572 }
 573
 574 /*
 575  * omap3isp_video_resume - Perform resume operation on the buffers
 576  * @video: ISP video object
 577  * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise
 578  *
 579  * This function is intended to be used on suspend/resume scenario. It
 580  * requests video queue layer to discard buffers marked as DONE if it's in
 581  * continuous mode and requests ISP modules to queue again the ACTIVE buffer
 582  * if there's any.
 583  */
 584 void omap3isp_video_resume(struct isp_video *video, int continuous)
 585 {
 586         struct isp_buffer *buf = NULL;
 587
 588         if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 589                 omap3isp_video_queue_discard_done(video->queue);
 590
 591         if (!list_empty(&video->dmaqueue)) {
 592                 buf = list_first_entry(&video->dmaqueue,
 593                                        struct isp_buffer, buffer.irqlist);
 594                 video->ops->queue(video, buf);
 595                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 596         } else {
 597                 if (continuous)
 598                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 599         }
 600 }
 601
 602 /* -----------------------------------------------------------------------------
 603  * V4L2 ioctls
 604  */
 605
 606 static int
 607 isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 608 {
 609         struct isp_video *video = video_drvdata(file);
 610
 611         strlcpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver));
 612         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 613         strlcpy(cap->bus_info, "media", sizeof(cap->bus_info));
 614
 615         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 616                 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 617         else
 618                 cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 619
 620         return 0;
 621 }
 622
 623 static int
 624 isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 625 {
 626         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 627         struct isp_video *video = video_drvdata(file);
 628
 629         if (format->type != video->type)
 630                 return -EINVAL;
 631
 632         mutex_lock(&video->mutex);
 633         *format = vfh->format;
 634         mutex_unlock(&video->mutex);
 635
 636         return 0;
 637 }
 638
 639 static int
 640 isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 641 {
 642         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 643         struct isp_video *video = video_drvdata(file);
 644         struct v4l2_mbus_framefmt fmt;
 645
 646         if (format->type != video->type)
 647                 return -EINVAL;
 648
 649         mutex_lock(&video->mutex);
 650
 651         /* Fill the bytesperline and sizeimage fields by converting to media bus
 652          * format and back to pixel format.
 653          */
 654         isp_video_pix_to_mbus(&format->fmt.pix, &fmt);
 655         isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
 656
 657         vfh->format = *format;
 658
 659         mutex_unlock(&video->mutex);
 660         return 0;
 661 }
 662
 663 static int
 664 isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 665 {
 666         struct isp_video *video = video_drvdata(file);
 667         struct v4l2_subdev_format fmt;
 668         struct v4l2_subdev *subdev;
 669         u32 pad;
 670         int ret;
 671
 672         if (format->type != video->type)
 673                 return -EINVAL;
 674
 675         subdev = isp_video_remote_subdev(video, &pad);
 676         if (subdev == NULL)
 677                 return -EINVAL;
 678
 679         isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
 680
 681         fmt.pad = pad;
 682         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 683         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 684         if (ret)
 685                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 686
 687         isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
 688         return 0;
 689 }
 690
 691 static int
 692 isp_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap)
 693 {
 694         struct isp_video *video = video_drvdata(file);
 695         struct v4l2_subdev *subdev;
 696         int ret;
 697
 698         subdev = isp_video_remote_subdev(video, NULL);
 699         if (subdev == NULL)
 700                 return -EINVAL;
 701
 702         mutex_lock(&video->mutex);
 703         ret = v4l2_subdev_call(subdev, video, cropcap, cropcap);
 704         mutex_unlock(&video->mutex);
 705
 706         return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 707 }
 708
 709 static int
 710 isp_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop)
 711 {
 712         struct isp_video *video = video_drvdata(file);
 713         struct v4l2_subdev_format format;
 714         struct v4l2_subdev *subdev;
 715         u32 pad;
 716         int ret;
 717
 718         subdev = isp_video_remote_subdev(video, &pad);
 719         if (subdev == NULL)
 720                 return -EINVAL;
 721
 722         /* Try the get crop operation first and fallback to get format if not
 723          * implemented.
 724          */
 725         ret = v4l2_subdev_call(subdev, video, g_crop, crop);
 726         if (ret != -ENOIOCTLCMD)
 727                 return ret;
 728
 729         format.pad = pad;
 730         format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 731         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
 732         if (ret < 0)
 733                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 734
 735         crop->c.left = 0;
 736         crop->c.top = 0;
 737         crop->c.width = format.format.width;
 738         crop->c.height = format.format.height;
 739
 740         return 0;
 741 }
 742
 743 static int
 744 isp_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
 745 {
 746         struct isp_video *video = video_drvdata(file);
 747         struct v4l2_subdev *subdev;
 748         int ret;
 749
 750         subdev = isp_video_remote_subdev(video, NULL);
 751         if (subdev == NULL)
 752                 return -EINVAL;
 753
 754         mutex_lock(&video->mutex);
 755         ret = v4l2_subdev_call(subdev, video, s_crop, crop);
 756         mutex_unlock(&video->mutex);
 757
 758         return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 759 }
 760
 761 static int
 762 isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 763 {
 764         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 765         struct isp_video *video = video_drvdata(file);
 766
 767         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 768             video->type != a->type)
 769                 return -EINVAL;
 770
 771         memset(a, 0, sizeof(*a));
 772         a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 773         a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
 774         a->parm.output.timeperframe = vfh->timeperframe;
 775
 776         return 0;
 777 }
 778
 779 static int
 780 isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 781 {
 782         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 783         struct isp_video *video = video_drvdata(file);
 784
 785         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 786             video->type != a->type)
 787                 return -EINVAL;
 788
 789         if (a->parm.output.timeperframe.denominator == 0)
 790                 a->parm.output.timeperframe.denominator = 1;
 791
 792         vfh->timeperframe = a->parm.output.timeperframe;
 793
 794         return 0;
 795 }
 796
 797 static int
 798 isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
 799 {
 800         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 801
 802         return omap3isp_video_queue_reqbufs(&vfh->queue, rb);
 803 }
 804
 805 static int
 806 isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
 807 {
 808         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 809
 810         return omap3isp_video_queue_querybuf(&vfh->queue, b);
 811 }
 812
 813 static int
 814 isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 815 {
 816         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 817
 818         return omap3isp_video_queue_qbuf(&vfh->queue, b);
 819 }
 820
 821 static int
 822 isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 823 {
 824         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 825
 826         return omap3isp_video_queue_dqbuf(&vfh->queue, b,
 827                                           file->f_flags & O_NONBLOCK);
 828 }
 829
 830 static int isp_video_check_external_subdevs(struct isp_video *video,
 831                                             struct isp_pipeline *pipe)
 832 {
 833         struct isp_device *isp = video->isp;
 834         struct media_entity *ents[] = {
 835                 &isp->isp_csi2a.subdev.entity,
 836                 &isp->isp_csi2c.subdev.entity,
 837                 &isp->isp_ccp2.subdev.entity,
 838                 &isp->isp_ccdc.subdev.entity
 839         };
 840         struct media_pad *source_pad;
 841         struct media_entity *source = NULL;
 842         struct media_entity *sink;
 843         struct v4l2_subdev_format fmt;
 844         struct v4l2_ext_controls ctrls;
 845         struct v4l2_ext_control ctrl;
 846         unsigned int i;
 847         int ret = 0;
 848
 849         for (i = 0; i < ARRAY_SIZE(ents); i++) {
 850                 /* Is the entity part of the pipeline? */
 851                 if (!(pipe->entities & (1 << ents[i]->id)))
 852                         continue;
 853
 854                 /* ISP entities have always sink pad == 0. Find source. */
 855                 source_pad = media_entity_remote_pad(&ents[i]->pads[0]);
 856                 if (source_pad == NULL)
 857                         continue;
 858
 859                 source = source_pad->entity;
 860                 sink = ents[i];
 861                 break;
 862         }
 863
 864         if (!source) {
 865                 dev_warn(isp->dev, "can't find source, failing now\n");
 866                 return ret;
 867         }
 868
 869         if (media_entity_type(source) != MEDIA_ENT_T_V4L2_SUBDEV)
 870                 return 0;
 871
 872         pipe->external = media_entity_to_v4l2_subdev(source);
 873
 874         fmt.pad = source_pad->index;
 875         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 876         ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink),
 877                                pad, get_fmt, NULL, &fmt);
 878         if (unlikely(ret < 0)) {
 879                 dev_warn(isp->dev, "get_fmt returned null!\n");
 880                 return ret;
 881         }
 882
 883         pipe->external_width =
 884                 omap3isp_video_format_info(fmt.format.code)->width;
 885
 886         memset(&ctrls, 0, sizeof(ctrls));
 887         memset(&ctrl, 0, sizeof(ctrl));
 888
 889         ctrl.id = V4L2_CID_PIXEL_RATE;
 890
 891         ctrls.count = 1;
 892         ctrls.controls = &ctrl;
 893
 894         ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &ctrls);
 895         if (ret < 0) {
 896                 dev_warn(isp->dev, "no pixel rate control in subdev %s\n",
 897                          pipe->external->name);
 898                 return ret;
 899         }
 900
 901         pipe->external_rate = ctrl.value64;
 902
 903         if (pipe->entities & (1 << isp->isp_ccdc.subdev.entity.id)) {
 904                 unsigned int rate = UINT_MAX;
 905                 /*
 906                  * Check that maximum allowed CCDC pixel rate isn't
 907                  * exceeded by the pixel rate.
 908                  */
 909                 omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate);
 910                 if (pipe->external_rate > rate)
 911                         return -ENOSPC;
 912         }
 913
 914         return 0;
 915 }
 916
 917 /*
 918  * Stream management
 919  *
 920  * Every ISP pipeline has a single input and a single output. The input can be
 921  * either a sensor or a video node. The output is always a video node.
 922  *
 923  * As every pipeline has an output video node, the ISP video objects at the
 924  * pipeline output stores the pipeline state. It tracks the streaming state of
 925  * both the input and output, as well as the availability of buffers.
 926  *
 927  * In sensor-to-memory mode, frames are always available at the pipeline input.
 928  * Starting the sensor usually requires I2C transfers and must be done in
 929  * interruptible context. The pipeline is started and stopped synchronously
 930  * to the stream on/off commands. All modules in the pipeline will get their
 931  * subdev set stream handler called. The module at the end of the pipeline must
 932  * delay starting the hardware until buffers are available at its output.
 933  *
 934  * In memory-to-memory mode, starting/stopping the stream requires
 935  * synchronization between the input and output. ISP modules can't be stopped
 936  * in the middle of a frame, and at least some of the modules seem to become
 937  * busy as soon as they're started, even if they don't receive a frame start
 938  * event. For that reason frames need to be processed in single-shot mode. The
 939  * driver needs to wait until a frame is completely processed and written to
 940  * memory before restarting the pipeline for the next frame. Pipelined
 941  * processing might be possible but requires more testing.
 942  *
 943  * Stream start must be delayed until buffers are available at both the input
 944  * and output. The pipeline must be started in the videobuf queue callback with
 945  * the buffers queue spinlock held. The modules subdev set stream operation must
 946  * not sleep.
 947  */
 948 static int
 949 isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 950 {
 951         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 952         struct isp_video *video = video_drvdata(file);
 953         enum isp_pipeline_state state;
 954         struct isp_pipeline *pipe;
 955         unsigned long flags;
 956         int ret;
 957
 958         if (type != video->type)
 959                 return -EINVAL;
 960
 961         mutex_lock(&video->stream_lock);
 962
 963         if (video->streaming) {
 964                 mutex_unlock(&video->stream_lock);
 965                 return -EBUSY;
 966         }
 967
 968         /* Start streaming on the pipeline. No link touching an entity in the
 969          * pipeline can be activated or deactivated once streaming is started.
 970          */
 971         pipe = video->video.entity.pipe
 972              ? to_isp_pipeline(&video->video.entity) : &video->pipe;
 973
 974         pipe->entities = 0;
 975
 976         if (video->isp->pdata->set_constraints)
 977                 video->isp->pdata->set_constraints(video->isp, true);
 978         pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]);
 979         pipe->max_rate = pipe->l3_ick;
 980
 981         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
 982         if (ret < 0)
 983                 goto err_pipeline_start;
 984
 985         /* Verify that the currently configured format matches the output of
 986          * the connected subdev.
 987          */
 988         ret = isp_video_check_format(video, vfh);
 989         if (ret < 0)
 990                 goto err_check_format;
 991
 992         video->bpl_padding = ret;
 993         video->bpl_value = vfh->format.fmt.pix.bytesperline;
 994
 995         ret = isp_video_get_graph_data(video, pipe);
 996         if (ret < 0)
 997                 goto err_check_format;
 998
 999         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1000                 state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT;
1001         else
1002                 state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT;
1003
1004         ret = isp_video_check_external_subdevs(video, pipe);
1005         if (ret < 0)
1006                 goto err_check_format;
1007
1008         pipe->error = false;
1009
1010         spin_lock_irqsave(&pipe->lock, flags);
1011         pipe->state &= ~ISP_PIPELINE_STREAM;
1012         pipe->state |= state;
1013         spin_unlock_irqrestore(&pipe->lock, flags);
1014
1015         /* Set the maximum time per frame as the value requested by userspace.
1016          * This is a soft limit that can be overridden if the hardware doesn't
1017          * support the request limit.
1018          */
1019         if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1020                 pipe->max_timeperframe = vfh->timeperframe;
1021
1022         video->queue = &vfh->queue;
1023         INIT_LIST_HEAD(&video->dmaqueue);
1024         atomic_set(&pipe->frame_number, -1);
1025
1026         ret = omap3isp_video_queue_streamon(&vfh->queue);
1027         if (ret < 0)
1028                 goto err_check_format;
1029
1030         /* In sensor-to-memory mode, the stream can be started synchronously
1031          * to the stream on command. In memory-to-memory mode, it will be
1032          * started when buffers are queued on both the input and output.
1033          */
1034         if (pipe->input == NULL) {
1035                 ret = omap3isp_pipeline_set_stream(pipe,
1036                                               ISP_PIPELINE_STREAM_CONTINUOUS);
1037                 if (ret < 0)
1038                         goto err_set_stream;
1039                 spin_lock_irqsave(&video->queue->irqlock, flags);
1040                 if (list_empty(&video->dmaqueue))
1041                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
1042                 spin_unlock_irqrestore(&video->queue->irqlock, flags);
1043         }
1044
1045         video->streaming = 1;
1046
1047         mutex_unlock(&video->stream_lock);
1048         return 0;
1049
1050 err_set_stream:
1051         omap3isp_video_queue_streamoff(&vfh->queue);
1052 err_check_format:
1053         media_entity_pipeline_stop(&video->video.entity);
1054 err_pipeline_start:
1055         if (video->isp->pdata->set_constraints)
1056                 video->isp->pdata->set_constraints(video->isp, false);
1057         /* The DMA queue must be emptied here, otherwise CCDC interrupts that
1058          * will get triggered the next time the CCDC is powered up will try to
1059          * access buffers that might have been freed but still present in the
1060          * DMA queue. This can easily get triggered if the above
1061          * omap3isp_pipeline_set_stream() call fails on a system with a
1062          * free-running sensor.
1063          */
1064         INIT_LIST_HEAD(&video->dmaqueue);
1065         video->queue = NULL;
1066
1067         mutex_unlock(&video->stream_lock);
1068         return ret;
1069 }
1070
1071 static int
1072 isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
1073 {
1074         struct isp_video_fh *vfh = to_isp_video_fh(fh);
1075         struct isp_video *video = video_drvdata(file);
1076         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
1077         enum isp_pipeline_state state;
1078         unsigned int streaming;
1079         unsigned long flags;
1080
1081         if (type != video->type)
1082                 return -EINVAL;
1083
1084         mutex_lock(&video->stream_lock);
1085
1086         /* Make sure we're not streaming yet. */
1087         mutex_lock(&vfh->queue.lock);
1088         streaming = vfh->queue.streaming;
1089         mutex_unlock(&vfh->queue.lock);
1090
1091         if (!streaming)
1092                 goto done;
1093
1094         /* Update the pipeline state. */
1095         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1096                 state = ISP_PIPELINE_STREAM_OUTPUT
1097                       | ISP_PIPELINE_QUEUE_OUTPUT;
1098         else
1099                 state = ISP_PIPELINE_STREAM_INPUT
1100                       | ISP_PIPELINE_QUEUE_INPUT;
1101
1102         spin_lock_irqsave(&pipe->lock, flags);
1103         pipe->state &= ~state;
1104         spin_unlock_irqrestore(&pipe->lock, flags);
1105
1106         /* Stop the stream. */
1107         omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED);
1108         omap3isp_video_queue_streamoff(&vfh->queue);
1109         video->queue = NULL;
1110         video->streaming = 0;
1111
1112         if (video->isp->pdata->set_constraints)
1113                 video->isp->pdata->set_constraints(video->isp, false);
1114         media_entity_pipeline_stop(&video->video.entity);
1115
1116 done:
1117         mutex_unlock(&video->stream_lock);
1118         return 0;
1119 }
1120
1121 static int
1122 isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
1123 {
1124         if (input->index > 0)
1125                 return -EINVAL;
1126
1127         strlcpy(input->name, "camera", sizeof(input->name));
1128         input->type = V4L2_INPUT_TYPE_CAMERA;
1129
1130         return 0;
1131 }
1132
1133 static int
1134 isp_video_g_input(struct file *file, void *fh, unsigned int *input)
1135 {
1136         *input = 0;
1137
1138         return 0;
1139 }
1140
1141 static int
1142 isp_video_s_input(struct file *file, void *fh, unsigned int input)
1143 {
1144         return input == 0 ? 0 : -EINVAL;
1145 }
1146
1147 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
1148         .vidioc_querycap                = isp_video_querycap,
1149         .vidioc_g_fmt_vid_cap           = isp_video_get_format,
1150         .vidioc_s_fmt_vid_cap           = isp_video_set_format,
1151         .vidioc_try_fmt_vid_cap         = isp_video_try_format,
1152         .vidioc_g_fmt_vid_out           = isp_video_get_format,
1153         .vidioc_s_fmt_vid_out           = isp_video_set_format,
1154         .vidioc_try_fmt_vid_out         = isp_video_try_format,
1155         .vidioc_cropcap                 = isp_video_cropcap,
1156         .vidioc_g_crop                  = isp_video_get_crop,
1157         .vidioc_s_crop                  = isp_video_set_crop,
1158         .vidioc_g_parm                  = isp_video_get_param,
1159         .vidioc_s_parm                  = isp_video_set_param,
1160         .vidioc_reqbufs                 = isp_video_reqbufs,
1161         .vidioc_querybuf                = isp_video_querybuf,
1162         .vidioc_qbuf                    = isp_video_qbuf,
1163         .vidioc_dqbuf                   = isp_video_dqbuf,
1164         .vidioc_streamon                = isp_video_streamon,
1165         .vidioc_streamoff               = isp_video_streamoff,
1166         .vidioc_enum_input              = isp_video_enum_input,
1167         .vidioc_g_input                 = isp_video_g_input,
1168         .vidioc_s_input                 = isp_video_s_input,
1169 };
1170
1171 /* -----------------------------------------------------------------------------
1172  * V4L2 file operations
1173  */
1174
1175 static int isp_video_open(struct file *file)
1176 {
1177         struct isp_video *video = video_drvdata(file);
1178         struct isp_video_fh *handle;
1179         int ret = 0;
1180
1181         handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1182         if (handle == NULL)
1183                 return -ENOMEM;
1184
1185         v4l2_fh_init(&handle->vfh, &video->video);
1186         v4l2_fh_add(&handle->vfh);
1187
1188         /* If this is the first user, initialise the pipeline. */
1189         if (omap3isp_get(video->isp) == NULL) {
1190                 ret = -EBUSY;
1191                 goto done;
1192         }
1193
1194         ret = omap3isp_pipeline_pm_use(&video->video.entity, 1);
1195         if (ret < 0) {
1196                 omap3isp_put(video->isp);
1197                 goto done;
1198         }
1199
1200         omap3isp_video_queue_init(&handle->queue, video->type,
1201                                   &isp_video_queue_ops, video->isp->dev,
1202                                   sizeof(struct isp_buffer));
1203
1204         memset(&handle->format, 0, sizeof(handle->format));
1205         handle->format.type = video->type;
1206         handle->timeperframe.denominator = 1;
1207
1208         handle->video = video;
1209         file->private_data = &handle->vfh;
1210
1211 done:
1212         if (ret < 0) {
1213                 v4l2_fh_del(&handle->vfh);
1214                 kfree(handle);
1215         }
1216
1217         return ret;
1218 }
1219
1220 static int isp_video_release(struct file *file)
1221 {
1222         struct isp_video *video = video_drvdata(file);
1223         struct v4l2_fh *vfh = file->private_data;
1224         struct isp_video_fh *handle = to_isp_video_fh(vfh);
1225
1226         /* Disable streaming and free the buffers queue resources. */
1227         isp_video_streamoff(file, vfh, video->type);
1228
1229         mutex_lock(&handle->queue.lock);
1230         omap3isp_video_queue_cleanup(&handle->queue);
1231         mutex_unlock(&handle->queue.lock);
1232
1233         omap3isp_pipeline_pm_use(&video->video.entity, 0);
1234
1235         /* Release the file handle. */
1236         v4l2_fh_del(vfh);
1237         kfree(handle);
1238         file->private_data = NULL;
1239
1240         omap3isp_put(video->isp);
1241
1242         return 0;
1243 }
1244
1245 static unsigned int isp_video_poll(struct file *file, poll_table *wait)
1246 {
1247         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1248         struct isp_video_queue *queue = &vfh->queue;
1249
1250         return omap3isp_video_queue_poll(queue, file, wait);
1251 }
1252
1253 static int isp_video_mmap(struct file *file, struct vm_area_struct *vma)
1254 {
1255         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1256
1257         return omap3isp_video_queue_mmap(&vfh->queue, vma);
1258 }
1259
1260 static struct v4l2_file_operations isp_video_fops = {
1261         .owner = THIS_MODULE,
1262         .unlocked_ioctl = video_ioctl2,
1263         .open = isp_video_open,
1264         .release = isp_video_release,
1265         .poll = isp_video_poll,
1266         .mmap = isp_video_mmap,
1267 };
1268
1269 /* -----------------------------------------------------------------------------
1270  * ISP video core
1271  */
1272
1273 static const struct isp_video_operations isp_video_dummy_ops = {
1274 };
1275
1276 int omap3isp_video_init(struct isp_video *video, const char *name)
1277 {
1278         const char *direction;
1279         int ret;
1280
1281         switch (video->type) {
1282         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1283                 direction = "output";
1284                 video->pad.flags = MEDIA_PAD_FL_SINK
1285                                    | MEDIA_PAD_FL_MUST_CONNECT;
1286                 break;
1287         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1288                 direction = "input";
1289                 video->pad.flags = MEDIA_PAD_FL_SOURCE
1290                                    | MEDIA_PAD_FL_MUST_CONNECT;
1291                 video->video.vfl_dir = VFL_DIR_TX;
1292                 break;
1293
1294         default:
1295                 return -EINVAL;
1296         }
1297
1298         ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1299         if (ret < 0)
1300                 return ret;
1301
1302         mutex_init(&video->mutex);
1303         atomic_set(&video->active, 0);
1304
1305         spin_lock_init(&video->pipe.lock);
1306         mutex_init(&video->stream_lock);
1307
1308         /* Initialize the video device. */
1309         if (video->ops == NULL)
1310                 video->ops = &isp_video_dummy_ops;
1311
1312         video->video.fops = &isp_video_fops;
1313         snprintf(video->video.name, sizeof(video->video.name),
1314                  "OMAP3 ISP %s %s", name, direction);
1315         video->video.vfl_type = VFL_TYPE_GRABBER;
1316         video->video.release = video_device_release_empty;
1317         video->video.ioctl_ops = &isp_video_ioctl_ops;
1318         video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED;
1319
1320         video_set_drvdata(&video->video, video);
1321
1322         return 0;
1323 }
1324
1325 void omap3isp_video_cleanup(struct isp_video *video)
1326 {
1327         media_entity_cleanup(&video->video.entity);
1328         mutex_destroy(&video->stream_lock);
1329         mutex_destroy(&video->mutex);
1330 }
1331
1332 int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev)
1333 {
1334         int ret;
1335
1336         video->video.v4l2_dev = vdev;
1337
1338         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1339         if (ret < 0)
1340                 dev_err(video->isp->dev,
1341                         "%s: could not register video device (%d)\n",
1342                         __func__, ret);
1343
1344         return ret;
1345 }
1346
1347 void omap3isp_video_unregister(struct isp_video *video)
1348 {
1349         if (video_is_registered(&video->video))
1350                 video_unregister_device(&video->video);
1351 }