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/pagemap.h>
  31 #include <linux/scatterlist.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <linux/vmalloc.h>
  35 #include <media/v4l2-dev.h>
  36 #include <media/v4l2-ioctl.h>
  37 #include <media/videobuf2-dma-contig.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  * Video queue operations
 330  */
 331
 332 static int isp_video_queue_setup(struct vb2_queue *queue,
 333                                  const struct v4l2_format *fmt,
 334                                  unsigned int *count, unsigned int *num_planes,
 335                                  unsigned int sizes[], void *alloc_ctxs[])
 336 {
 337         struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
 338         struct isp_video *video = vfh->video;
 339
 340         *num_planes = 1;
 341
 342         sizes[0] = vfh->format.fmt.pix.sizeimage;
 343         if (sizes[0] == 0)
 344                 return -EINVAL;
 345
 346         alloc_ctxs[0] = video->alloc_ctx;
 347
 348         *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0]));
 349
 350         return 0;
 351 }
 352
 353 static int isp_video_buffer_prepare(struct vb2_buffer *buf)
 354 {
 355         struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
 356         struct isp_buffer *buffer = to_isp_buffer(buf);
 357         struct isp_video *video = vfh->video;
 358         dma_addr_t addr;
 359
 360         /* Refuse to prepare the buffer is the video node has registered an
 361          * error. We don't need to take any lock here as the operation is
 362          * inherently racy. The authoritative check will be performed in the
 363          * queue handler, which can't return an error, this check is just a best
 364          * effort to notify userspace as early as possible.
 365          */
 366         if (unlikely(video->error))
 367                 return -EIO;
 368
 369         addr = vb2_dma_contig_plane_dma_addr(buf, 0);
 370         if (!IS_ALIGNED(addr, 32)) {
 371                 dev_dbg(video->isp->dev,
 372                         "Buffer address must be aligned to 32 bytes boundary.\n");
 373                 return -EINVAL;
 374         }
 375
 376         vb2_set_plane_payload(&buffer->vb, 0, vfh->format.fmt.pix.sizeimage);
 377         buffer->isp_addr = addr;
 378
 379         return 0;
 380 }
 381
 382 /*
 383  * isp_video_buffer_queue - Add buffer to streaming queue
 384  * @buf: Video buffer
 385  *
 386  * In memory-to-memory mode, start streaming on the pipeline if buffers are
 387  * queued on both the input and the output, if the pipeline isn't already busy.
 388  * If the pipeline is busy, it will be restarted in the output module interrupt
 389  * handler.
 390  */
 391 static void isp_video_buffer_queue(struct vb2_buffer *buf)
 392 {
 393         struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
 394         struct isp_buffer *buffer = to_isp_buffer(buf);
 395         struct isp_video *video = vfh->video;
 396         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 397         enum isp_pipeline_state state;
 398         unsigned long flags;
 399         unsigned int empty;
 400         unsigned int start;
 401
 402         spin_lock_irqsave(&video->irqlock, flags);
 403
 404         if (unlikely(video->error)) {
 405                 vb2_buffer_done(&buffer->vb, VB2_BUF_STATE_ERROR);
 406                 spin_unlock_irqrestore(&video->irqlock, flags);
 407                 return;
 408         }
 409
 410         empty = list_empty(&video->dmaqueue);
 411         list_add_tail(&buffer->irqlist, &video->dmaqueue);
 412
 413         spin_unlock_irqrestore(&video->irqlock, flags);
 414
 415         if (empty) {
 416                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 417                         state = ISP_PIPELINE_QUEUE_OUTPUT;
 418                 else
 419                         state = ISP_PIPELINE_QUEUE_INPUT;
 420
 421                 spin_lock_irqsave(&pipe->lock, flags);
 422                 pipe->state |= state;
 423                 video->ops->queue(video, buffer);
 424                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 425
 426                 start = isp_pipeline_ready(pipe);
 427                 if (start)
 428                         pipe->state |= ISP_PIPELINE_STREAM;
 429                 spin_unlock_irqrestore(&pipe->lock, flags);
 430
 431                 if (start)
 432                         omap3isp_pipeline_set_stream(pipe,
 433                                                 ISP_PIPELINE_STREAM_SINGLESHOT);
 434         }
 435 }
 436
 437 static const struct vb2_ops isp_video_queue_ops = {
 438         .queue_setup = isp_video_queue_setup,
 439         .buf_prepare = isp_video_buffer_prepare,
 440         .buf_queue = isp_video_buffer_queue,
 441 };
 442
 443 /*
 444  * omap3isp_video_buffer_next - Complete the current buffer and return the next
 445  * @video: ISP video object
 446  *
 447  * Remove the current video buffer from the DMA queue and fill its timestamp and
 448  * field count before handing it back to videobuf2.
 449  *
 450  * For capture video nodes the buffer state is set to VB2_BUF_STATE_DONE if no
 451  * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise.
 452  * For video output nodes the buffer state is always set to VB2_BUF_STATE_DONE.
 453  *
 454  * The DMA queue is expected to contain at least one buffer.
 455  *
 456  * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
 457  * empty.
 458  */
 459 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
 460 {
 461         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 462         enum isp_pipeline_state state;
 463         struct isp_buffer *buf;
 464         unsigned long flags;
 465         struct timespec ts;
 466
 467         spin_lock_irqsave(&video->irqlock, flags);
 468         if (WARN_ON(list_empty(&video->dmaqueue))) {
 469                 spin_unlock_irqrestore(&video->irqlock, flags);
 470                 return NULL;
 471         }
 472
 473         buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
 474                                irqlist);
 475         list_del(&buf->irqlist);
 476         spin_unlock_irqrestore(&video->irqlock, flags);
 477
 478         ktime_get_ts(&ts);
 479         buf->vb.v4l2_buf.timestamp.tv_sec = ts.tv_sec;
 480         buf->vb.v4l2_buf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
 481
 482         /* Do frame number propagation only if this is the output video node.
 483          * Frame number either comes from the CSI receivers or it gets
 484          * incremented here if H3A is not active.
 485          * Note: There is no guarantee that the output buffer will finish
 486          * first, so the input number might lag behind by 1 in some cases.
 487          */
 488         if (video == pipe->output && !pipe->do_propagation)
 489                 buf->vb.v4l2_buf.sequence =
 490                         atomic_inc_return(&pipe->frame_number);
 491         else
 492                 buf->vb.v4l2_buf.sequence = atomic_read(&pipe->frame_number);
 493
 494         /* Report pipeline errors to userspace on the capture device side. */
 495         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
 496                 state = VB2_BUF_STATE_ERROR;
 497                 pipe->error = false;
 498         } else {
 499                 state = VB2_BUF_STATE_DONE;
 500         }
 501
 502         vb2_buffer_done(&buf->vb, state);
 503
 504         spin_lock_irqsave(&video->irqlock, flags);
 505
 506         if (list_empty(&video->dmaqueue)) {
 507                 spin_unlock_irqrestore(&video->irqlock, flags);
 508
 509                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 510                         state = ISP_PIPELINE_QUEUE_OUTPUT
 511                               | ISP_PIPELINE_STREAM;
 512                 else
 513                         state = ISP_PIPELINE_QUEUE_INPUT
 514                               | ISP_PIPELINE_STREAM;
 515
 516                 spin_lock_irqsave(&pipe->lock, flags);
 517                 pipe->state &= ~state;
 518                 if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS)
 519                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 520                 spin_unlock_irqrestore(&pipe->lock, flags);
 521                 return NULL;
 522         }
 523
 524         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
 525                 spin_lock(&pipe->lock);
 526                 pipe->state &= ~ISP_PIPELINE_STREAM;
 527                 spin_unlock(&pipe->lock);
 528         }
 529
 530         buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
 531                                irqlist);
 532         buf->vb.state = VB2_BUF_STATE_ACTIVE;
 533
 534         spin_unlock_irqrestore(&video->irqlock, flags);
 535
 536         return buf;
 537 }
 538
 539 /*
 540  * omap3isp_video_cancel_stream - Cancel stream on a video node
 541  * @video: ISP video object
 542  *
 543  * Cancelling a stream mark all buffers on the video node as erroneous and makes
 544  * sure no new buffer can be queued.
 545  */
 546 void omap3isp_video_cancel_stream(struct isp_video *video)
 547 {
 548         unsigned long flags;
 549
 550         spin_lock_irqsave(&video->irqlock, flags);
 551
 552         while (!list_empty(&video->dmaqueue)) {
 553                 struct isp_buffer *buf;
 554
 555                 buf = list_first_entry(&video->dmaqueue,
 556                                        struct isp_buffer, irqlist);
 557                 list_del(&buf->irqlist);
 558                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 559         }
 560
 561         video->error = true;
 562
 563         spin_unlock_irqrestore(&video->irqlock, flags);
 564 }
 565
 566 /*
 567  * omap3isp_video_resume - Perform resume operation on the buffers
 568  * @video: ISP video object
 569  * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise
 570  *
 571  * This function is intended to be used on suspend/resume scenario. It
 572  * requests video queue layer to discard buffers marked as DONE if it's in
 573  * continuous mode and requests ISP modules to queue again the ACTIVE buffer
 574  * if there's any.
 575  */
 576 void omap3isp_video_resume(struct isp_video *video, int continuous)
 577 {
 578         struct isp_buffer *buf = NULL;
 579
 580         if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 581                 mutex_lock(&video->queue_lock);
 582                 vb2_discard_done(video->queue);
 583                 mutex_unlock(&video->queue_lock);
 584         }
 585
 586         if (!list_empty(&video->dmaqueue)) {
 587                 buf = list_first_entry(&video->dmaqueue,
 588                                        struct isp_buffer, irqlist);
 589                 video->ops->queue(video, buf);
 590                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 591         } else {
 592                 if (continuous)
 593                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 594         }
 595 }
 596
 597 /* -----------------------------------------------------------------------------
 598  * V4L2 ioctls
 599  */
 600
 601 static int
 602 isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 603 {
 604         struct isp_video *video = video_drvdata(file);
 605
 606         strlcpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver));
 607         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 608         strlcpy(cap->bus_info, "media", sizeof(cap->bus_info));
 609
 610         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 611                 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 612         else
 613                 cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 614
 615         return 0;
 616 }
 617
 618 static int
 619 isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 620 {
 621         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 622         struct isp_video *video = video_drvdata(file);
 623
 624         if (format->type != video->type)
 625                 return -EINVAL;
 626
 627         mutex_lock(&video->mutex);
 628         *format = vfh->format;
 629         mutex_unlock(&video->mutex);
 630
 631         return 0;
 632 }
 633
 634 static int
 635 isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 636 {
 637         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 638         struct isp_video *video = video_drvdata(file);
 639         struct v4l2_mbus_framefmt fmt;
 640
 641         if (format->type != video->type)
 642                 return -EINVAL;
 643
 644         mutex_lock(&video->mutex);
 645
 646         /* Fill the bytesperline and sizeimage fields by converting to media bus
 647          * format and back to pixel format.
 648          */
 649         isp_video_pix_to_mbus(&format->fmt.pix, &fmt);
 650         isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
 651
 652         vfh->format = *format;
 653
 654         mutex_unlock(&video->mutex);
 655         return 0;
 656 }
 657
 658 static int
 659 isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 660 {
 661         struct isp_video *video = video_drvdata(file);
 662         struct v4l2_subdev_format fmt;
 663         struct v4l2_subdev *subdev;
 664         u32 pad;
 665         int ret;
 666
 667         if (format->type != video->type)
 668                 return -EINVAL;
 669
 670         subdev = isp_video_remote_subdev(video, &pad);
 671         if (subdev == NULL)
 672                 return -EINVAL;
 673
 674         isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
 675
 676         fmt.pad = pad;
 677         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 678         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 679         if (ret)
 680                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 681
 682         isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
 683         return 0;
 684 }
 685
 686 static int
 687 isp_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap)
 688 {
 689         struct isp_video *video = video_drvdata(file);
 690         struct v4l2_subdev *subdev;
 691         int ret;
 692
 693         subdev = isp_video_remote_subdev(video, NULL);
 694         if (subdev == NULL)
 695                 return -EINVAL;
 696
 697         mutex_lock(&video->mutex);
 698         ret = v4l2_subdev_call(subdev, video, cropcap, cropcap);
 699         mutex_unlock(&video->mutex);
 700
 701         return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 702 }
 703
 704 static int
 705 isp_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop)
 706 {
 707         struct isp_video *video = video_drvdata(file);
 708         struct v4l2_subdev_format format;
 709         struct v4l2_subdev *subdev;
 710         u32 pad;
 711         int ret;
 712
 713         subdev = isp_video_remote_subdev(video, &pad);
 714         if (subdev == NULL)
 715                 return -EINVAL;
 716
 717         /* Try the get crop operation first and fallback to get format if not
 718          * implemented.
 719          */
 720         ret = v4l2_subdev_call(subdev, video, g_crop, crop);
 721         if (ret != -ENOIOCTLCMD)
 722                 return ret;
 723
 724         format.pad = pad;
 725         format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 726         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
 727         if (ret < 0)
 728                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 729
 730         crop->c.left = 0;
 731         crop->c.top = 0;
 732         crop->c.width = format.format.width;
 733         crop->c.height = format.format.height;
 734
 735         return 0;
 736 }
 737
 738 static int
 739 isp_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
 740 {
 741         struct isp_video *video = video_drvdata(file);
 742         struct v4l2_subdev *subdev;
 743         int ret;
 744
 745         subdev = isp_video_remote_subdev(video, NULL);
 746         if (subdev == NULL)
 747                 return -EINVAL;
 748
 749         mutex_lock(&video->mutex);
 750         ret = v4l2_subdev_call(subdev, video, s_crop, crop);
 751         mutex_unlock(&video->mutex);
 752
 753         return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 754 }
 755
 756 static int
 757 isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 758 {
 759         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 760         struct isp_video *video = video_drvdata(file);
 761
 762         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 763             video->type != a->type)
 764                 return -EINVAL;
 765
 766         memset(a, 0, sizeof(*a));
 767         a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 768         a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
 769         a->parm.output.timeperframe = vfh->timeperframe;
 770
 771         return 0;
 772 }
 773
 774 static int
 775 isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 776 {
 777         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 778         struct isp_video *video = video_drvdata(file);
 779
 780         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 781             video->type != a->type)
 782                 return -EINVAL;
 783
 784         if (a->parm.output.timeperframe.denominator == 0)
 785                 a->parm.output.timeperframe.denominator = 1;
 786
 787         vfh->timeperframe = a->parm.output.timeperframe;
 788
 789         return 0;
 790 }
 791
 792 static int
 793 isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
 794 {
 795         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 796         struct isp_video *video = video_drvdata(file);
 797         int ret;
 798
 799         mutex_lock(&video->queue_lock);
 800         ret = vb2_reqbufs(&vfh->queue, rb);
 801         mutex_unlock(&video->queue_lock);
 802
 803         return ret;
 804 }
 805
 806 static int
 807 isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
 808 {
 809         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 810         struct isp_video *video = video_drvdata(file);
 811         int ret;
 812
 813         mutex_lock(&video->queue_lock);
 814         ret = vb2_querybuf(&vfh->queue, b);
 815         mutex_unlock(&video->queue_lock);
 816
 817         return ret;
 818 }
 819
 820 static int
 821 isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 822 {
 823         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 824         struct isp_video *video = video_drvdata(file);
 825         int ret;
 826
 827         mutex_lock(&video->queue_lock);
 828         ret = vb2_qbuf(&vfh->queue, b);
 829         mutex_unlock(&video->queue_lock);
 830
 831         return ret;
 832 }
 833
 834 static int
 835 isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 836 {
 837         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 838         struct isp_video *video = video_drvdata(file);
 839         int ret;
 840
 841         mutex_lock(&video->queue_lock);
 842         ret = vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK);
 843         mutex_unlock(&video->queue_lock);
 844
 845         return ret;
 846 }
 847
 848 static int isp_video_check_external_subdevs(struct isp_video *video,
 849                                             struct isp_pipeline *pipe)
 850 {
 851         struct isp_device *isp = video->isp;
 852         struct media_entity *ents[] = {
 853                 &isp->isp_csi2a.subdev.entity,
 854                 &isp->isp_csi2c.subdev.entity,
 855                 &isp->isp_ccp2.subdev.entity,
 856                 &isp->isp_ccdc.subdev.entity
 857         };
 858         struct media_pad *source_pad;
 859         struct media_entity *source = NULL;
 860         struct media_entity *sink;
 861         struct v4l2_subdev_format fmt;
 862         struct v4l2_ext_controls ctrls;
 863         struct v4l2_ext_control ctrl;
 864         unsigned int i;
 865         int ret;
 866
 867         /* Memory-to-memory pipelines have no external subdev. */
 868         if (pipe->input != NULL)
 869                 return 0;
 870
 871         for (i = 0; i < ARRAY_SIZE(ents); i++) {
 872                 /* Is the entity part of the pipeline? */
 873                 if (!(pipe->entities & (1 << ents[i]->id)))
 874                         continue;
 875
 876                 /* ISP entities have always sink pad == 0. Find source. */
 877                 source_pad = media_entity_remote_pad(&ents[i]->pads[0]);
 878                 if (source_pad == NULL)
 879                         continue;
 880
 881                 source = source_pad->entity;
 882                 sink = ents[i];
 883                 break;
 884         }
 885
 886         if (!source) {
 887                 dev_warn(isp->dev, "can't find source, failing now\n");
 888                 return -EINVAL;
 889         }
 890
 891         if (media_entity_type(source) != MEDIA_ENT_T_V4L2_SUBDEV)
 892                 return 0;
 893
 894         pipe->external = media_entity_to_v4l2_subdev(source);
 895
 896         fmt.pad = source_pad->index;
 897         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 898         ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink),
 899                                pad, get_fmt, NULL, &fmt);
 900         if (unlikely(ret < 0)) {
 901                 dev_warn(isp->dev, "get_fmt returned null!\n");
 902                 return ret;
 903         }
 904
 905         pipe->external_width =
 906                 omap3isp_video_format_info(fmt.format.code)->width;
 907
 908         memset(&ctrls, 0, sizeof(ctrls));
 909         memset(&ctrl, 0, sizeof(ctrl));
 910
 911         ctrl.id = V4L2_CID_PIXEL_RATE;
 912
 913         ctrls.count = 1;
 914         ctrls.controls = &ctrl;
 915
 916         ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &ctrls);
 917         if (ret < 0) {
 918                 dev_warn(isp->dev, "no pixel rate control in subdev %s\n",
 919                          pipe->external->name);
 920                 return ret;
 921         }
 922
 923         pipe->external_rate = ctrl.value64;
 924
 925         if (pipe->entities & (1 << isp->isp_ccdc.subdev.entity.id)) {
 926                 unsigned int rate = UINT_MAX;
 927                 /*
 928                  * Check that maximum allowed CCDC pixel rate isn't
 929                  * exceeded by the pixel rate.
 930                  */
 931                 omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate);
 932                 if (pipe->external_rate > rate)
 933                         return -ENOSPC;
 934         }
 935
 936         return 0;
 937 }
 938
 939 /*
 940  * Stream management
 941  *
 942  * Every ISP pipeline has a single input and a single output. The input can be
 943  * either a sensor or a video node. The output is always a video node.
 944  *
 945  * As every pipeline has an output video node, the ISP video objects at the
 946  * pipeline output stores the pipeline state. It tracks the streaming state of
 947  * both the input and output, as well as the availability of buffers.
 948  *
 949  * In sensor-to-memory mode, frames are always available at the pipeline input.
 950  * Starting the sensor usually requires I2C transfers and must be done in
 951  * interruptible context. The pipeline is started and stopped synchronously
 952  * to the stream on/off commands. All modules in the pipeline will get their
 953  * subdev set stream handler called. The module at the end of the pipeline must
 954  * delay starting the hardware until buffers are available at its output.
 955  *
 956  * In memory-to-memory mode, starting/stopping the stream requires
 957  * synchronization between the input and output. ISP modules can't be stopped
 958  * in the middle of a frame, and at least some of the modules seem to become
 959  * busy as soon as they're started, even if they don't receive a frame start
 960  * event. For that reason frames need to be processed in single-shot mode. The
 961  * driver needs to wait until a frame is completely processed and written to
 962  * memory before restarting the pipeline for the next frame. Pipelined
 963  * processing might be possible but requires more testing.
 964  *
 965  * Stream start must be delayed until buffers are available at both the input
 966  * and output. The pipeline must be started in the videobuf queue callback with
 967  * the buffers queue spinlock held. The modules subdev set stream operation must
 968  * not sleep.
 969  */
 970 static int
 971 isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 972 {
 973         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 974         struct isp_video *video = video_drvdata(file);
 975         enum isp_pipeline_state state;
 976         struct isp_pipeline *pipe;
 977         unsigned long flags;
 978         int ret;
 979
 980         if (type != video->type)
 981                 return -EINVAL;
 982
 983         mutex_lock(&video->stream_lock);
 984
 985         /* Start streaming on the pipeline. No link touching an entity in the
 986          * pipeline can be activated or deactivated once streaming is started.
 987          */
 988         pipe = video->video.entity.pipe
 989              ? to_isp_pipeline(&video->video.entity) : &video->pipe;
 990
 991         pipe->entities = 0;
 992
 993         if (video->isp->pdata->set_constraints)
 994                 video->isp->pdata->set_constraints(video->isp, true);
 995         pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]);
 996         pipe->max_rate = pipe->l3_ick;
 997
 998         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
 999         if (ret < 0)
1000                 goto err_pipeline_start;
1001
1002         /* Verify that the currently configured format matches the output of
1003          * the connected subdev.
1004          */
1005         ret = isp_video_check_format(video, vfh);
1006         if (ret < 0)
1007                 goto err_check_format;
1008
1009         video->bpl_padding = ret;
1010         video->bpl_value = vfh->format.fmt.pix.bytesperline;
1011
1012         ret = isp_video_get_graph_data(video, pipe);
1013         if (ret < 0)
1014                 goto err_check_format;
1015
1016         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1017                 state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT;
1018         else
1019                 state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT;
1020
1021         ret = isp_video_check_external_subdevs(video, pipe);
1022         if (ret < 0)
1023                 goto err_check_format;
1024
1025         pipe->error = false;
1026
1027         spin_lock_irqsave(&pipe->lock, flags);
1028         pipe->state &= ~ISP_PIPELINE_STREAM;
1029         pipe->state |= state;
1030         spin_unlock_irqrestore(&pipe->lock, flags);
1031
1032         /* Set the maximum time per frame as the value requested by userspace.
1033          * This is a soft limit that can be overridden if the hardware doesn't
1034          * support the request limit.
1035          */
1036         if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1037                 pipe->max_timeperframe = vfh->timeperframe;
1038
1039         video->queue = &vfh->queue;
1040         INIT_LIST_HEAD(&video->dmaqueue);
1041         atomic_set(&pipe->frame_number, -1);
1042
1043         mutex_lock(&video->queue_lock);
1044         ret = vb2_streamon(&vfh->queue, type);
1045         mutex_unlock(&video->queue_lock);
1046         if (ret < 0)
1047                 goto err_check_format;
1048
1049         /* In sensor-to-memory mode, the stream can be started synchronously
1050          * to the stream on command. In memory-to-memory mode, it will be
1051          * started when buffers are queued on both the input and output.
1052          */
1053         if (pipe->input == NULL) {
1054                 ret = omap3isp_pipeline_set_stream(pipe,
1055                                               ISP_PIPELINE_STREAM_CONTINUOUS);
1056                 if (ret < 0)
1057                         goto err_set_stream;
1058                 spin_lock_irqsave(&video->irqlock, flags);
1059                 if (list_empty(&video->dmaqueue))
1060                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
1061                 spin_unlock_irqrestore(&video->irqlock, flags);
1062         }
1063
1064         mutex_unlock(&video->stream_lock);
1065         return 0;
1066
1067 err_set_stream:
1068         mutex_lock(&video->queue_lock);
1069         vb2_streamoff(&vfh->queue, type);
1070         mutex_unlock(&video->queue_lock);
1071 err_check_format:
1072         media_entity_pipeline_stop(&video->video.entity);
1073 err_pipeline_start:
1074         if (video->isp->pdata->set_constraints)
1075                 video->isp->pdata->set_constraints(video->isp, false);
1076         /* The DMA queue must be emptied here, otherwise CCDC interrupts that
1077          * will get triggered the next time the CCDC is powered up will try to
1078          * access buffers that might have been freed but still present in the
1079          * DMA queue. This can easily get triggered if the above
1080          * omap3isp_pipeline_set_stream() call fails on a system with a
1081          * free-running sensor.
1082          */
1083         INIT_LIST_HEAD(&video->dmaqueue);
1084         video->queue = NULL;
1085
1086         mutex_unlock(&video->stream_lock);
1087         return ret;
1088 }
1089
1090 static int
1091 isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
1092 {
1093         struct isp_video_fh *vfh = to_isp_video_fh(fh);
1094         struct isp_video *video = video_drvdata(file);
1095         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
1096         enum isp_pipeline_state state;
1097         unsigned int streaming;
1098         unsigned long flags;
1099
1100         if (type != video->type)
1101                 return -EINVAL;
1102
1103         mutex_lock(&video->stream_lock);
1104
1105         /* Make sure we're not streaming yet. */
1106         mutex_lock(&video->queue_lock);
1107         streaming = vb2_is_streaming(&vfh->queue);
1108         mutex_unlock(&video->queue_lock);
1109
1110         if (!streaming)
1111                 goto done;
1112
1113         /* Update the pipeline state. */
1114         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1115                 state = ISP_PIPELINE_STREAM_OUTPUT
1116                       | ISP_PIPELINE_QUEUE_OUTPUT;
1117         else
1118                 state = ISP_PIPELINE_STREAM_INPUT
1119                       | ISP_PIPELINE_QUEUE_INPUT;
1120
1121         spin_lock_irqsave(&pipe->lock, flags);
1122         pipe->state &= ~state;
1123         spin_unlock_irqrestore(&pipe->lock, flags);
1124
1125         /* Stop the stream. */
1126         omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED);
1127         omap3isp_video_cancel_stream(video);
1128
1129         mutex_lock(&video->queue_lock);
1130         vb2_streamoff(&vfh->queue, type);
1131         mutex_unlock(&video->queue_lock);
1132         video->queue = NULL;
1133         video->error = false;
1134
1135         if (video->isp->pdata->set_constraints)
1136                 video->isp->pdata->set_constraints(video->isp, false);
1137         media_entity_pipeline_stop(&video->video.entity);
1138
1139 done:
1140         mutex_unlock(&video->stream_lock);
1141         return 0;
1142 }
1143
1144 static int
1145 isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
1146 {
1147         if (input->index > 0)
1148                 return -EINVAL;
1149
1150         strlcpy(input->name, "camera", sizeof(input->name));
1151         input->type = V4L2_INPUT_TYPE_CAMERA;
1152
1153         return 0;
1154 }
1155
1156 static int
1157 isp_video_g_input(struct file *file, void *fh, unsigned int *input)
1158 {
1159         *input = 0;
1160
1161         return 0;
1162 }
1163
1164 static int
1165 isp_video_s_input(struct file *file, void *fh, unsigned int input)
1166 {
1167         return input == 0 ? 0 : -EINVAL;
1168 }
1169
1170 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
1171         .vidioc_querycap                = isp_video_querycap,
1172         .vidioc_g_fmt_vid_cap           = isp_video_get_format,
1173         .vidioc_s_fmt_vid_cap           = isp_video_set_format,
1174         .vidioc_try_fmt_vid_cap         = isp_video_try_format,
1175         .vidioc_g_fmt_vid_out           = isp_video_get_format,
1176         .vidioc_s_fmt_vid_out           = isp_video_set_format,
1177         .vidioc_try_fmt_vid_out         = isp_video_try_format,
1178         .vidioc_cropcap                 = isp_video_cropcap,
1179         .vidioc_g_crop                  = isp_video_get_crop,
1180         .vidioc_s_crop                  = isp_video_set_crop,
1181         .vidioc_g_parm                  = isp_video_get_param,
1182         .vidioc_s_parm                  = isp_video_set_param,
1183         .vidioc_reqbufs                 = isp_video_reqbufs,
1184         .vidioc_querybuf                = isp_video_querybuf,
1185         .vidioc_qbuf                    = isp_video_qbuf,
1186         .vidioc_dqbuf                   = isp_video_dqbuf,
1187         .vidioc_streamon                = isp_video_streamon,
1188         .vidioc_streamoff               = isp_video_streamoff,
1189         .vidioc_enum_input              = isp_video_enum_input,
1190         .vidioc_g_input                 = isp_video_g_input,
1191         .vidioc_s_input                 = isp_video_s_input,
1192 };
1193
1194 /* -----------------------------------------------------------------------------
1195  * V4L2 file operations
1196  */
1197
1198 static int isp_video_open(struct file *file)
1199 {
1200         struct isp_video *video = video_drvdata(file);
1201         struct isp_video_fh *handle;
1202         struct vb2_queue *queue;
1203         int ret = 0;
1204
1205         handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1206         if (handle == NULL)
1207                 return -ENOMEM;
1208
1209         v4l2_fh_init(&handle->vfh, &video->video);
1210         v4l2_fh_add(&handle->vfh);
1211
1212         /* If this is the first user, initialise the pipeline. */
1213         if (omap3isp_get(video->isp) == NULL) {
1214                 ret = -EBUSY;
1215                 goto done;
1216         }
1217
1218         ret = omap3isp_pipeline_pm_use(&video->video.entity, 1);
1219         if (ret < 0) {
1220                 omap3isp_put(video->isp);
1221                 goto done;
1222         }
1223
1224         queue = &handle->queue;
1225         queue->type = video->type;
1226         queue->io_modes = VB2_MMAP | VB2_USERPTR;
1227         queue->drv_priv = handle;
1228         queue->ops = &isp_video_queue_ops;
1229         queue->mem_ops = &vb2_dma_contig_memops;
1230         queue->buf_struct_size = sizeof(struct isp_buffer);
1231         queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1232
1233         ret = vb2_queue_init(&handle->queue);
1234         if (ret < 0) {
1235                 omap3isp_put(video->isp);
1236                 goto done;
1237         }
1238
1239         memset(&handle->format, 0, sizeof(handle->format));
1240         handle->format.type = video->type;
1241         handle->timeperframe.denominator = 1;
1242
1243         handle->video = video;
1244         file->private_data = &handle->vfh;
1245
1246 done:
1247         if (ret < 0) {
1248                 v4l2_fh_del(&handle->vfh);
1249                 kfree(handle);
1250         }
1251
1252         return ret;
1253 }
1254
1255 static int isp_video_release(struct file *file)
1256 {
1257         struct isp_video *video = video_drvdata(file);
1258         struct v4l2_fh *vfh = file->private_data;
1259         struct isp_video_fh *handle = to_isp_video_fh(vfh);
1260
1261         /* Disable streaming and free the buffers queue resources. */
1262         isp_video_streamoff(file, vfh, video->type);
1263
1264         mutex_lock(&video->queue_lock);
1265         vb2_queue_release(&handle->queue);
1266         mutex_unlock(&video->queue_lock);
1267
1268         omap3isp_pipeline_pm_use(&video->video.entity, 0);
1269
1270         /* Release the file handle. */
1271         v4l2_fh_del(vfh);
1272         kfree(handle);
1273         file->private_data = NULL;
1274
1275         omap3isp_put(video->isp);
1276
1277         return 0;
1278 }
1279
1280 static unsigned int isp_video_poll(struct file *file, poll_table *wait)
1281 {
1282         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1283         struct isp_video *video = video_drvdata(file);
1284         int ret;
1285
1286         mutex_lock(&video->queue_lock);
1287         ret = vb2_poll(&vfh->queue, file, wait);
1288         mutex_unlock(&video->queue_lock);
1289
1290         return ret;
1291 }
1292
1293 static int isp_video_mmap(struct file *file, struct vm_area_struct *vma)
1294 {
1295         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1296         struct isp_video *video = video_drvdata(file);
1297         int ret;
1298
1299         mutex_lock(&video->queue_lock);
1300         ret = vb2_mmap(&vfh->queue, vma);
1301         mutex_unlock(&video->queue_lock);
1302
1303         return ret;
1304 }
1305
1306 static struct v4l2_file_operations isp_video_fops = {
1307         .owner = THIS_MODULE,
1308         .unlocked_ioctl = video_ioctl2,
1309         .open = isp_video_open,
1310         .release = isp_video_release,
1311         .poll = isp_video_poll,
1312         .mmap = isp_video_mmap,
1313 };
1314
1315 /* -----------------------------------------------------------------------------
1316  * ISP video core
1317  */
1318
1319 static const struct isp_video_operations isp_video_dummy_ops = {
1320 };
1321
1322 int omap3isp_video_init(struct isp_video *video, const char *name)
1323 {
1324         const char *direction;
1325         int ret;
1326
1327         switch (video->type) {
1328         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1329                 direction = "output";
1330                 video->pad.flags = MEDIA_PAD_FL_SINK
1331                                    | MEDIA_PAD_FL_MUST_CONNECT;
1332                 break;
1333         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1334                 direction = "input";
1335                 video->pad.flags = MEDIA_PAD_FL_SOURCE
1336                                    | MEDIA_PAD_FL_MUST_CONNECT;
1337                 video->video.vfl_dir = VFL_DIR_TX;
1338                 break;
1339
1340         default:
1341                 return -EINVAL;
1342         }
1343
1344         video->alloc_ctx = vb2_dma_contig_init_ctx(video->isp->dev);
1345         if (IS_ERR(video->alloc_ctx))
1346                 return PTR_ERR(video->alloc_ctx);
1347
1348         ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1349         if (ret < 0) {
1350                 vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1351                 return ret;
1352         }
1353
1354         mutex_init(&video->mutex);
1355         atomic_set(&video->active, 0);
1356
1357         spin_lock_init(&video->pipe.lock);
1358         mutex_init(&video->stream_lock);
1359         mutex_init(&video->queue_lock);
1360         spin_lock_init(&video->irqlock);
1361
1362         /* Initialize the video device. */
1363         if (video->ops == NULL)
1364                 video->ops = &isp_video_dummy_ops;
1365
1366         video->video.fops = &isp_video_fops;
1367         snprintf(video->video.name, sizeof(video->video.name),
1368                  "OMAP3 ISP %s %s", name, direction);
1369         video->video.vfl_type = VFL_TYPE_GRABBER;
1370         video->video.release = video_device_release_empty;
1371         video->video.ioctl_ops = &isp_video_ioctl_ops;
1372         video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED;
1373
1374         video_set_drvdata(&video->video, video);
1375
1376         return 0;
1377 }
1378
1379 void omap3isp_video_cleanup(struct isp_video *video)
1380 {
1381         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1382         media_entity_cleanup(&video->video.entity);
1383         mutex_destroy(&video->queue_lock);
1384         mutex_destroy(&video->stream_lock);
1385         mutex_destroy(&video->mutex);
1386 }
1387
1388 int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev)
1389 {
1390         int ret;
1391
1392         video->video.v4l2_dev = vdev;
1393
1394         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1395         if (ret < 0)
1396                 dev_err(video->isp->dev,
1397                         "%s: could not register video device (%d)\n",
1398                         __func__, ret);
1399
1400         return ret;
1401 }
1402
1403 void omap3isp_video_unregister(struct isp_video *video)
1404 {
1405         if (video_is_registered(&video->video))
1406                 video_unregister_device(&video->video);
1407 }