drivers/media/platform/omap3isp/ispvideo.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ispvideo.c
   4  *
   5  * TI OMAP3 ISP - Generic video node
   6  *
   7  * Copyright (C) 2009-2010 Nokia Corporation
   8  *
   9  * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  10  *           Sakari Ailus <sakari.ailus@iki.fi>
  11  */
  12
  13 #include <linux/clk.h>
  14 #include <linux/mm.h>
  15 #include <linux/module.h>
  16 #include <linux/pagemap.h>
  17 #include <linux/scatterlist.h>
  18 #include <linux/sched.h>
  19 #include <linux/slab.h>
  20 #include <linux/vmalloc.h>
  21
  22 #include <media/v4l2-dev.h>
  23 #include <media/v4l2-ioctl.h>
  24 #include <media/v4l2-mc.h>
  25 #include <media/videobuf2-dma-contig.h>
  26
  27 #include "ispvideo.h"
  28 #include "isp.h"
  29
  30
  31 /* -----------------------------------------------------------------------------
  32  * Helper functions
  33  */
  34
  35 /*
  36  * NOTE: When adding new media bus codes, always remember to add
  37  * corresponding in-memory formats to the table below!!!
  38  */
  39 static struct isp_format_info formats[] = {
  40         { MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
  41           MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
  42           V4L2_PIX_FMT_GREY, 8, 1, },
  43         { MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10,
  44           MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y8_1X8,
  45           V4L2_PIX_FMT_Y10, 10, 2, },
  46         { MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y10_1X10,
  47           MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y8_1X8,
  48           V4L2_PIX_FMT_Y12, 12, 2, },
  49         { MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
  50           MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
  51           V4L2_PIX_FMT_SBGGR8, 8, 1, },
  52         { MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
  53           MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
  54           V4L2_PIX_FMT_SGBRG8, 8, 1, },
  55         { MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
  56           MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
  57           V4L2_PIX_FMT_SGRBG8, 8, 1, },
  58         { MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
  59           MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
  60           V4L2_PIX_FMT_SRGGB8, 8, 1, },
  61         { MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8, MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
  62           MEDIA_BUS_FMT_SBGGR10_1X10, 0,
  63           V4L2_PIX_FMT_SBGGR10DPCM8, 8, 1, },
  64         { MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8, MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
  65           MEDIA_BUS_FMT_SGBRG10_1X10, 0,
  66           V4L2_PIX_FMT_SGBRG10DPCM8, 8, 1, },
  67         { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
  68           MEDIA_BUS_FMT_SGRBG10_1X10, 0,
  69           V4L2_PIX_FMT_SGRBG10DPCM8, 8, 1, },
  70         { MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8, MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
  71           MEDIA_BUS_FMT_SRGGB10_1X10, 0,
  72           V4L2_PIX_FMT_SRGGB10DPCM8, 8, 1, },
  73         { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10,
  74           MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR8_1X8,
  75           V4L2_PIX_FMT_SBGGR10, 10, 2, },
  76         { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10,
  77           MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG8_1X8,
  78           V4L2_PIX_FMT_SGBRG10, 10, 2, },
  79         { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10,
  80           MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG8_1X8,
  81           V4L2_PIX_FMT_SGRBG10, 10, 2, },
  82         { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10,
  83           MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB8_1X8,
  84           V4L2_PIX_FMT_SRGGB10, 10, 2, },
  85         { MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR10_1X10,
  86           MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR8_1X8,
  87           V4L2_PIX_FMT_SBGGR12, 12, 2, },
  88         { MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG10_1X10,
  89           MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG8_1X8,
  90           V4L2_PIX_FMT_SGBRG12, 12, 2, },
  91         { MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG10_1X10,
  92           MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG8_1X8,
  93           V4L2_PIX_FMT_SGRBG12, 12, 2, },
  94         { MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB10_1X10,
  95           MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB8_1X8,
  96           V4L2_PIX_FMT_SRGGB12, 12, 2, },
  97         { MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16,
  98           MEDIA_BUS_FMT_UYVY8_1X16, 0,
  99           V4L2_PIX_FMT_UYVY, 16, 2, },
 100         { MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16,
 101           MEDIA_BUS_FMT_YUYV8_1X16, 0,
 102           V4L2_PIX_FMT_YUYV, 16, 2, },
 103         { MEDIA_BUS_FMT_UYVY8_2X8, MEDIA_BUS_FMT_UYVY8_2X8,
 104           MEDIA_BUS_FMT_UYVY8_2X8, 0,
 105           V4L2_PIX_FMT_UYVY, 8, 2, },
 106         { MEDIA_BUS_FMT_YUYV8_2X8, MEDIA_BUS_FMT_YUYV8_2X8,
 107           MEDIA_BUS_FMT_YUYV8_2X8, 0,
 108           V4L2_PIX_FMT_YUYV, 8, 2, },
 109         /* Empty entry to catch the unsupported pixel code (0) used by the CCDC
 110          * module and avoid NULL pointer dereferences.
 111          */
 112         { 0, }
 113 };
 114
 115 const struct isp_format_info *omap3isp_video_format_info(u32 code)
 116 {
 117         unsigned int i;
 118
 119         for (i = 0; i < ARRAY_SIZE(formats); ++i) {
 120                 if (formats[i].code == code)
 121                         return &formats[i];
 122         }
 123
 124         return NULL;
 125 }
 126
 127 /*
 128  * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format
 129  * @video: ISP video instance
 130  * @mbus: v4l2_mbus_framefmt format (input)
 131  * @pix: v4l2_pix_format format (output)
 132  *
 133  * Fill the output pix structure with information from the input mbus format.
 134  * The bytesperline and sizeimage fields are computed from the requested bytes
 135  * per line value in the pix format and information from the video instance.
 136  *
 137  * Return the number of padding bytes at end of line.
 138  */
 139 static unsigned int isp_video_mbus_to_pix(const struct isp_video *video,
 140                                           const struct v4l2_mbus_framefmt *mbus,
 141                                           struct v4l2_pix_format *pix)
 142 {
 143         unsigned int bpl = pix->bytesperline;
 144         unsigned int min_bpl;
 145         unsigned int i;
 146
 147         memset(pix, 0, sizeof(*pix));
 148         pix->width = mbus->width;
 149         pix->height = mbus->height;
 150
 151         for (i = 0; i < ARRAY_SIZE(formats); ++i) {
 152                 if (formats[i].code == mbus->code)
 153                         break;
 154         }
 155
 156         if (WARN_ON(i == ARRAY_SIZE(formats)))
 157                 return 0;
 158
 159         min_bpl = pix->width * formats[i].bpp;
 160
 161         /* Clamp the requested bytes per line value. If the maximum bytes per
 162          * line value is zero, the module doesn't support user configurable line
 163          * sizes. Override the requested value with the minimum in that case.
 164          */
 165         if (video->bpl_max)
 166                 bpl = clamp(bpl, min_bpl, video->bpl_max);
 167         else
 168                 bpl = min_bpl;
 169
 170         if (!video->bpl_zero_padding || bpl != min_bpl)
 171                 bpl = ALIGN(bpl, video->bpl_alignment);
 172
 173         pix->pixelformat = formats[i].pixelformat;
 174         pix->bytesperline = bpl;
 175         pix->sizeimage = pix->bytesperline * pix->height;
 176         pix->colorspace = mbus->colorspace;
 177         pix->field = mbus->field;
 178
 179         return bpl - min_bpl;
 180 }
 181
 182 static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix,
 183                                   struct v4l2_mbus_framefmt *mbus)
 184 {
 185         unsigned int i;
 186
 187         memset(mbus, 0, sizeof(*mbus));
 188         mbus->width = pix->width;
 189         mbus->height = pix->height;
 190
 191         /* Skip the last format in the loop so that it will be selected if no
 192          * match is found.
 193          */
 194         for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) {
 195                 if (formats[i].pixelformat == pix->pixelformat)
 196                         break;
 197         }
 198
 199         mbus->code = formats[i].code;
 200         mbus->colorspace = pix->colorspace;
 201         mbus->field = pix->field;
 202 }
 203
 204 static struct v4l2_subdev *
 205 isp_video_remote_subdev(struct isp_video *video, u32 *pad)
 206 {
 207         struct media_pad *remote;
 208
 209         remote = media_entity_remote_pad(&video->pad);
 210
 211         if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
 212                 return NULL;
 213
 214         if (pad)
 215                 *pad = remote->index;
 216
 217         return media_entity_to_v4l2_subdev(remote->entity);
 218 }
 219
 220 /* Return a pointer to the ISP video instance at the far end of the pipeline. */
 221 static int isp_video_get_graph_data(struct isp_video *video,
 222                                     struct isp_pipeline *pipe)
 223 {
 224         struct media_graph graph;
 225         struct media_entity *entity = &video->video.entity;
 226         struct media_device *mdev = entity->graph_obj.mdev;
 227         struct isp_video *far_end = NULL;
 228         int ret;
 229
 230         mutex_lock(&mdev->graph_mutex);
 231         ret = media_graph_walk_init(&graph, mdev);
 232         if (ret) {
 233                 mutex_unlock(&mdev->graph_mutex);
 234                 return ret;
 235         }
 236
 237         media_graph_walk_start(&graph, entity);
 238
 239         while ((entity = media_graph_walk_next(&graph))) {
 240                 struct isp_video *__video;
 241
 242                 media_entity_enum_set(&pipe->ent_enum, entity);
 243
 244                 if (far_end != NULL)
 245                         continue;
 246
 247                 if (entity == &video->video.entity)
 248                         continue;
 249
 250                 if (!is_media_entity_v4l2_video_device(entity))
 251                         continue;
 252
 253                 __video = to_isp_video(media_entity_to_video_device(entity));
 254                 if (__video->type != video->type)
 255                         far_end = __video;
 256         }
 257
 258         mutex_unlock(&mdev->graph_mutex);
 259
 260         media_graph_walk_cleanup(&graph);
 261
 262         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 263                 pipe->input = far_end;
 264                 pipe->output = video;
 265         } else {
 266                 if (far_end == NULL)
 267                         return -EPIPE;
 268
 269                 pipe->input = video;
 270                 pipe->output = far_end;
 271         }
 272
 273         return 0;
 274 }
 275
 276 static int
 277 __isp_video_get_format(struct isp_video *video, struct v4l2_format *format)
 278 {
 279         struct v4l2_subdev_format fmt;
 280         struct v4l2_subdev *subdev;
 281         u32 pad;
 282         int ret;
 283
 284         subdev = isp_video_remote_subdev(video, &pad);
 285         if (subdev == NULL)
 286                 return -EINVAL;
 287
 288         fmt.pad = pad;
 289         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 290
 291         mutex_lock(&video->mutex);
 292         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 293         mutex_unlock(&video->mutex);
 294
 295         if (ret)
 296                 return ret;
 297
 298         format->type = video->type;
 299         return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
 300 }
 301
 302 static int
 303 isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh)
 304 {
 305         struct v4l2_format format;
 306         int ret;
 307
 308         memcpy(&format, &vfh->format, sizeof(format));
 309         ret = __isp_video_get_format(video, &format);
 310         if (ret < 0)
 311                 return ret;
 312
 313         if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat ||
 314             vfh->format.fmt.pix.height != format.fmt.pix.height ||
 315             vfh->format.fmt.pix.width != format.fmt.pix.width ||
 316             vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline ||
 317             vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage ||
 318             vfh->format.fmt.pix.field != format.fmt.pix.field)
 319                 return -EINVAL;
 320
 321         return 0;
 322 }
 323
 324 /* -----------------------------------------------------------------------------
 325  * Video queue operations
 326  */
 327
 328 static int isp_video_queue_setup(struct vb2_queue *queue,
 329                                  unsigned int *count, unsigned int *num_planes,
 330                                  unsigned int sizes[], struct device *alloc_devs[])
 331 {
 332         struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
 333         struct isp_video *video = vfh->video;
 334
 335         *num_planes = 1;
 336
 337         sizes[0] = vfh->format.fmt.pix.sizeimage;
 338         if (sizes[0] == 0)
 339                 return -EINVAL;
 340
 341         *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0]));
 342
 343         return 0;
 344 }
 345
 346 static int isp_video_buffer_prepare(struct vb2_buffer *buf)
 347 {
 348         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf);
 349         struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
 350         struct isp_buffer *buffer = to_isp_buffer(vbuf);
 351         struct isp_video *video = vfh->video;
 352         dma_addr_t addr;
 353
 354         /* Refuse to prepare the buffer is the video node has registered an
 355          * error. We don't need to take any lock here as the operation is
 356          * inherently racy. The authoritative check will be performed in the
 357          * queue handler, which can't return an error, this check is just a best
 358          * effort to notify userspace as early as possible.
 359          */
 360         if (unlikely(video->error))
 361                 return -EIO;
 362
 363         addr = vb2_dma_contig_plane_dma_addr(buf, 0);
 364         if (!IS_ALIGNED(addr, 32)) {
 365                 dev_dbg(video->isp->dev,
 366                         "Buffer address must be aligned to 32 bytes boundary.\n");
 367                 return -EINVAL;
 368         }
 369
 370         vb2_set_plane_payload(&buffer->vb.vb2_buf, 0,
 371                               vfh->format.fmt.pix.sizeimage);
 372         buffer->dma = addr;
 373
 374         return 0;
 375 }
 376
 377 /*
 378  * isp_video_buffer_queue - Add buffer to streaming queue
 379  * @buf: Video buffer
 380  *
 381  * In memory-to-memory mode, start streaming on the pipeline if buffers are
 382  * queued on both the input and the output, if the pipeline isn't already busy.
 383  * If the pipeline is busy, it will be restarted in the output module interrupt
 384  * handler.
 385  */
 386 static void isp_video_buffer_queue(struct vb2_buffer *buf)
 387 {
 388         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf);
 389         struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
 390         struct isp_buffer *buffer = to_isp_buffer(vbuf);
 391         struct isp_video *video = vfh->video;
 392         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 393         enum isp_pipeline_state state;
 394         unsigned long flags;
 395         unsigned int empty;
 396         unsigned int start;
 397
 398         spin_lock_irqsave(&video->irqlock, flags);
 399
 400         if (unlikely(video->error)) {
 401                 vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 402                 spin_unlock_irqrestore(&video->irqlock, flags);
 403                 return;
 404         }
 405
 406         empty = list_empty(&video->dmaqueue);
 407         list_add_tail(&buffer->irqlist, &video->dmaqueue);
 408
 409         spin_unlock_irqrestore(&video->irqlock, flags);
 410
 411         if (empty) {
 412                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 413                         state = ISP_PIPELINE_QUEUE_OUTPUT;
 414                 else
 415                         state = ISP_PIPELINE_QUEUE_INPUT;
 416
 417                 spin_lock_irqsave(&pipe->lock, flags);
 418                 pipe->state |= state;
 419                 video->ops->queue(video, buffer);
 420                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 421
 422                 start = isp_pipeline_ready(pipe);
 423                 if (start)
 424                         pipe->state |= ISP_PIPELINE_STREAM;
 425                 spin_unlock_irqrestore(&pipe->lock, flags);
 426
 427                 if (start)
 428                         omap3isp_pipeline_set_stream(pipe,
 429                                                 ISP_PIPELINE_STREAM_SINGLESHOT);
 430         }
 431 }
 432
 433 /*
 434  * omap3isp_video_return_buffers - Return all queued buffers to videobuf2
 435  * @video: ISP video object
 436  * @state: new state for the returned buffers
 437  *
 438  * Return all buffers queued on the video node to videobuf2 in the given state.
 439  * The buffer state should be VB2_BUF_STATE_QUEUED if called due to an error
 440  * when starting the stream, or VB2_BUF_STATE_ERROR otherwise.
 441  *
 442  * The function must be called with the video irqlock held.
 443  */
 444 static void omap3isp_video_return_buffers(struct isp_video *video,
 445                                           enum vb2_buffer_state state)
 446 {
 447         while (!list_empty(&video->dmaqueue)) {
 448                 struct isp_buffer *buf;
 449
 450                 buf = list_first_entry(&video->dmaqueue,
 451                                        struct isp_buffer, irqlist);
 452                 list_del(&buf->irqlist);
 453                 vb2_buffer_done(&buf->vb.vb2_buf, state);
 454         }
 455 }
 456
 457 static int isp_video_start_streaming(struct vb2_queue *queue,
 458                                      unsigned int count)
 459 {
 460         struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
 461         struct isp_video *video = vfh->video;
 462         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 463         unsigned long flags;
 464         int ret;
 465
 466         /* In sensor-to-memory mode, the stream can be started synchronously
 467          * to the stream on command. In memory-to-memory mode, it will be
 468          * started when buffers are queued on both the input and output.
 469          */
 470         if (pipe->input)
 471                 return 0;
 472
 473         ret = omap3isp_pipeline_set_stream(pipe,
 474                                            ISP_PIPELINE_STREAM_CONTINUOUS);
 475         if (ret < 0) {
 476                 spin_lock_irqsave(&video->irqlock, flags);
 477                 omap3isp_video_return_buffers(video, VB2_BUF_STATE_QUEUED);
 478                 spin_unlock_irqrestore(&video->irqlock, flags);
 479                 return ret;
 480         }
 481
 482         spin_lock_irqsave(&video->irqlock, flags);
 483         if (list_empty(&video->dmaqueue))
 484                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 485         spin_unlock_irqrestore(&video->irqlock, flags);
 486
 487         return 0;
 488 }
 489
 490 static const struct vb2_ops isp_video_queue_ops = {
 491         .queue_setup = isp_video_queue_setup,
 492         .buf_prepare = isp_video_buffer_prepare,
 493         .buf_queue = isp_video_buffer_queue,
 494         .start_streaming = isp_video_start_streaming,
 495 };
 496
 497 /*
 498  * omap3isp_video_buffer_next - Complete the current buffer and return the next
 499  * @video: ISP video object
 500  *
 501  * Remove the current video buffer from the DMA queue and fill its timestamp and
 502  * field count before handing it back to videobuf2.
 503  *
 504  * For capture video nodes the buffer state is set to VB2_BUF_STATE_DONE if no
 505  * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise.
 506  * For video output nodes the buffer state is always set to VB2_BUF_STATE_DONE.
 507  *
 508  * The DMA queue is expected to contain at least one buffer.
 509  *
 510  * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
 511  * empty.
 512  */
 513 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
 514 {
 515         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 516         enum vb2_buffer_state vb_state;
 517         struct isp_buffer *buf;
 518         unsigned long flags;
 519
 520         spin_lock_irqsave(&video->irqlock, flags);
 521         if (WARN_ON(list_empty(&video->dmaqueue))) {
 522                 spin_unlock_irqrestore(&video->irqlock, flags);
 523                 return NULL;
 524         }
 525
 526         buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
 527                                irqlist);
 528         list_del(&buf->irqlist);
 529         spin_unlock_irqrestore(&video->irqlock, flags);
 530
 531         buf->vb.vb2_buf.timestamp = ktime_get_ns();
 532
 533         /* Do frame number propagation only if this is the output video node.
 534          * Frame number either comes from the CSI receivers or it gets
 535          * incremented here if H3A is not active.
 536          * Note: There is no guarantee that the output buffer will finish
 537          * first, so the input number might lag behind by 1 in some cases.
 538          */
 539         if (video == pipe->output && !pipe->do_propagation)
 540                 buf->vb.sequence =
 541                         atomic_inc_return(&pipe->frame_number);
 542         else
 543                 buf->vb.sequence = atomic_read(&pipe->frame_number);
 544
 545         if (pipe->field != V4L2_FIELD_NONE)
 546                 buf->vb.sequence /= 2;
 547
 548         buf->vb.field = pipe->field;
 549
 550         /* Report pipeline errors to userspace on the capture device side. */
 551         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
 552                 vb_state = VB2_BUF_STATE_ERROR;
 553                 pipe->error = false;
 554         } else {
 555                 vb_state = VB2_BUF_STATE_DONE;
 556         }
 557
 558         vb2_buffer_done(&buf->vb.vb2_buf, vb_state);
 559
 560         spin_lock_irqsave(&video->irqlock, flags);
 561
 562         if (list_empty(&video->dmaqueue)) {
 563                 enum isp_pipeline_state state;
 564
 565                 spin_unlock_irqrestore(&video->irqlock, flags);
 566
 567                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 568                         state = ISP_PIPELINE_QUEUE_OUTPUT
 569                               | ISP_PIPELINE_STREAM;
 570                 else
 571                         state = ISP_PIPELINE_QUEUE_INPUT
 572                               | ISP_PIPELINE_STREAM;
 573
 574                 spin_lock_irqsave(&pipe->lock, flags);
 575                 pipe->state &= ~state;
 576                 if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS)
 577                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 578                 spin_unlock_irqrestore(&pipe->lock, flags);
 579                 return NULL;
 580         }
 581
 582         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
 583                 spin_lock(&pipe->lock);
 584                 pipe->state &= ~ISP_PIPELINE_STREAM;
 585                 spin_unlock(&pipe->lock);
 586         }
 587
 588         buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
 589                                irqlist);
 590
 591         spin_unlock_irqrestore(&video->irqlock, flags);
 592
 593         return buf;
 594 }
 595
 596 /*
 597  * omap3isp_video_cancel_stream - Cancel stream on a video node
 598  * @video: ISP video object
 599  *
 600  * Cancelling a stream returns all buffers queued on the video node to videobuf2
 601  * in the erroneous state and makes sure no new buffer can be queued.
 602  */
 603 void omap3isp_video_cancel_stream(struct isp_video *video)
 604 {
 605         unsigned long flags;
 606
 607         spin_lock_irqsave(&video->irqlock, flags);
 608         omap3isp_video_return_buffers(video, VB2_BUF_STATE_ERROR);
 609         video->error = true;
 610         spin_unlock_irqrestore(&video->irqlock, flags);
 611 }
 612
 613 /*
 614  * omap3isp_video_resume - Perform resume operation on the buffers
 615  * @video: ISP video object
 616  * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise
 617  *
 618  * This function is intended to be used on suspend/resume scenario. It
 619  * requests video queue layer to discard buffers marked as DONE if it's in
 620  * continuous mode and requests ISP modules to queue again the ACTIVE buffer
 621  * if there's any.
 622  */
 623 void omap3isp_video_resume(struct isp_video *video, int continuous)
 624 {
 625         struct isp_buffer *buf = NULL;
 626
 627         if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 628                 mutex_lock(&video->queue_lock);
 629                 vb2_discard_done(video->queue);
 630                 mutex_unlock(&video->queue_lock);
 631         }
 632
 633         if (!list_empty(&video->dmaqueue)) {
 634                 buf = list_first_entry(&video->dmaqueue,
 635                                        struct isp_buffer, irqlist);
 636                 video->ops->queue(video, buf);
 637                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 638         } else {
 639                 if (continuous)
 640                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 641         }
 642 }
 643
 644 /* -----------------------------------------------------------------------------
 645  * V4L2 ioctls
 646  */
 647
 648 static int
 649 isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 650 {
 651         struct isp_video *video = video_drvdata(file);
 652
 653         strscpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver));
 654         strscpy(cap->card, video->video.name, sizeof(cap->card));
 655         strscpy(cap->bus_info, "media", sizeof(cap->bus_info));
 656
 657         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
 658                 | V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
 659
 660
 661         return 0;
 662 }
 663
 664 static int
 665 isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 666 {
 667         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 668         struct isp_video *video = video_drvdata(file);
 669
 670         if (format->type != video->type)
 671                 return -EINVAL;
 672
 673         mutex_lock(&video->mutex);
 674         *format = vfh->format;
 675         mutex_unlock(&video->mutex);
 676
 677         return 0;
 678 }
 679
 680 static int
 681 isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 682 {
 683         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 684         struct isp_video *video = video_drvdata(file);
 685         struct v4l2_mbus_framefmt fmt;
 686
 687         if (format->type != video->type)
 688                 return -EINVAL;
 689
 690         /* Replace unsupported field orders with sane defaults. */
 691         switch (format->fmt.pix.field) {
 692         case V4L2_FIELD_NONE:
 693                 /* Progressive is supported everywhere. */
 694                 break;
 695         case V4L2_FIELD_ALTERNATE:
 696                 /* ALTERNATE is not supported on output nodes. */
 697                 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 698                         format->fmt.pix.field = V4L2_FIELD_NONE;
 699                 break;
 700         case V4L2_FIELD_INTERLACED:
 701                 /* The ISP has no concept of video standard, select the
 702                  * top-bottom order when the unqualified interlaced order is
 703                  * requested.
 704                  */
 705                 format->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
 706                 fallthrough;
 707         case V4L2_FIELD_INTERLACED_TB:
 708         case V4L2_FIELD_INTERLACED_BT:
 709                 /* Interlaced orders are only supported at the CCDC output. */
 710                 if (video != &video->isp->isp_ccdc.video_out)
 711                         format->fmt.pix.field = V4L2_FIELD_NONE;
 712                 break;
 713         case V4L2_FIELD_TOP:
 714         case V4L2_FIELD_BOTTOM:
 715         case V4L2_FIELD_SEQ_TB:
 716         case V4L2_FIELD_SEQ_BT:
 717         default:
 718                 /* All other field orders are currently unsupported, default to
 719                  * progressive.
 720                  */
 721                 format->fmt.pix.field = V4L2_FIELD_NONE;
 722                 break;
 723         }
 724
 725         /* Fill the bytesperline and sizeimage fields by converting to media bus
 726          * format and back to pixel format.
 727          */
 728         isp_video_pix_to_mbus(&format->fmt.pix, &fmt);
 729         isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
 730
 731         mutex_lock(&video->mutex);
 732         vfh->format = *format;
 733         mutex_unlock(&video->mutex);
 734
 735         return 0;
 736 }
 737
 738 static int
 739 isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 740 {
 741         struct isp_video *video = video_drvdata(file);
 742         struct v4l2_subdev_format fmt;
 743         struct v4l2_subdev *subdev;
 744         u32 pad;
 745         int ret;
 746
 747         if (format->type != video->type)
 748                 return -EINVAL;
 749
 750         subdev = isp_video_remote_subdev(video, &pad);
 751         if (subdev == NULL)
 752                 return -EINVAL;
 753
 754         isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
 755
 756         fmt.pad = pad;
 757         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 758         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 759         if (ret)
 760                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 761
 762         isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
 763         return 0;
 764 }
 765
 766 static int
 767 isp_video_get_selection(struct file *file, void *fh, struct v4l2_selection *sel)
 768 {
 769         struct isp_video *video = video_drvdata(file);
 770         struct v4l2_subdev_format format;
 771         struct v4l2_subdev *subdev;
 772         struct v4l2_subdev_selection sdsel = {
 773                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 774                 .target = sel->target,
 775         };
 776         u32 pad;
 777         int ret;
 778
 779         switch (sel->target) {
 780         case V4L2_SEL_TGT_CROP:
 781         case V4L2_SEL_TGT_CROP_BOUNDS:
 782         case V4L2_SEL_TGT_CROP_DEFAULT:
 783                 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 784                         return -EINVAL;
 785                 break;
 786         case V4L2_SEL_TGT_COMPOSE:
 787         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 788         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 789                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 790                         return -EINVAL;
 791                 break;
 792         default:
 793                 return -EINVAL;
 794         }
 795         subdev = isp_video_remote_subdev(video, &pad);
 796         if (subdev == NULL)
 797                 return -EINVAL;
 798
 799         /* Try the get selection operation first and fallback to get format if not
 800          * implemented.
 801          */
 802         sdsel.pad = pad;
 803         ret = v4l2_subdev_call(subdev, pad, get_selection, NULL, &sdsel);
 804         if (!ret)
 805                 sel->r = sdsel.r;
 806         if (ret != -ENOIOCTLCMD)
 807                 return ret;
 808
 809         format.pad = pad;
 810         format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 811         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
 812         if (ret < 0)
 813                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 814
 815         sel->r.left = 0;
 816         sel->r.top = 0;
 817         sel->r.width = format.format.width;
 818         sel->r.height = format.format.height;
 819
 820         return 0;
 821 }
 822
 823 static int
 824 isp_video_set_selection(struct file *file, void *fh, struct v4l2_selection *sel)
 825 {
 826         struct isp_video *video = video_drvdata(file);
 827         struct v4l2_subdev *subdev;
 828         struct v4l2_subdev_selection sdsel = {
 829                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 830                 .target = sel->target,
 831                 .flags = sel->flags,
 832                 .r = sel->r,
 833         };
 834         u32 pad;
 835         int ret;
 836
 837         switch (sel->target) {
 838         case V4L2_SEL_TGT_CROP:
 839                 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 840                         return -EINVAL;
 841                 break;
 842         case V4L2_SEL_TGT_COMPOSE:
 843                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 844                         return -EINVAL;
 845                 break;
 846         default:
 847                 return -EINVAL;
 848         }
 849         subdev = isp_video_remote_subdev(video, &pad);
 850         if (subdev == NULL)
 851                 return -EINVAL;
 852
 853         sdsel.pad = pad;
 854         mutex_lock(&video->mutex);
 855         ret = v4l2_subdev_call(subdev, pad, set_selection, NULL, &sdsel);
 856         mutex_unlock(&video->mutex);
 857         if (!ret)
 858                 sel->r = sdsel.r;
 859
 860         return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 861 }
 862
 863 static int
 864 isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 865 {
 866         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 867         struct isp_video *video = video_drvdata(file);
 868
 869         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 870             video->type != a->type)
 871                 return -EINVAL;
 872
 873         memset(a, 0, sizeof(*a));
 874         a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 875         a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
 876         a->parm.output.timeperframe = vfh->timeperframe;
 877
 878         return 0;
 879 }
 880
 881 static int
 882 isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 883 {
 884         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 885         struct isp_video *video = video_drvdata(file);
 886
 887         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 888             video->type != a->type)
 889                 return -EINVAL;
 890
 891         if (a->parm.output.timeperframe.denominator == 0)
 892                 a->parm.output.timeperframe.denominator = 1;
 893
 894         vfh->timeperframe = a->parm.output.timeperframe;
 895
 896         return 0;
 897 }
 898
 899 static int
 900 isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
 901 {
 902         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 903         struct isp_video *video = video_drvdata(file);
 904         int ret;
 905
 906         mutex_lock(&video->queue_lock);
 907         ret = vb2_reqbufs(&vfh->queue, rb);
 908         mutex_unlock(&video->queue_lock);
 909
 910         return ret;
 911 }
 912
 913 static int
 914 isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
 915 {
 916         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 917         struct isp_video *video = video_drvdata(file);
 918         int ret;
 919
 920         mutex_lock(&video->queue_lock);
 921         ret = vb2_querybuf(&vfh->queue, b);
 922         mutex_unlock(&video->queue_lock);
 923
 924         return ret;
 925 }
 926
 927 static int
 928 isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 929 {
 930         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 931         struct isp_video *video = video_drvdata(file);
 932         int ret;
 933
 934         mutex_lock(&video->queue_lock);
 935         ret = vb2_qbuf(&vfh->queue, video->video.v4l2_dev->mdev, b);
 936         mutex_unlock(&video->queue_lock);
 937
 938         return ret;
 939 }
 940
 941 static int
 942 isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 943 {
 944         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 945         struct isp_video *video = video_drvdata(file);
 946         int ret;
 947
 948         mutex_lock(&video->queue_lock);
 949         ret = vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK);
 950         mutex_unlock(&video->queue_lock);
 951
 952         return ret;
 953 }
 954
 955 static int isp_video_check_external_subdevs(struct isp_video *video,
 956                                             struct isp_pipeline *pipe)
 957 {
 958         struct isp_device *isp = video->isp;
 959         struct media_entity *ents[] = {
 960                 &isp->isp_csi2a.subdev.entity,
 961                 &isp->isp_csi2c.subdev.entity,
 962                 &isp->isp_ccp2.subdev.entity,
 963                 &isp->isp_ccdc.subdev.entity
 964         };
 965         struct media_pad *source_pad;
 966         struct media_entity *source = NULL;
 967         struct media_entity *sink;
 968         struct v4l2_subdev_format fmt;
 969         struct v4l2_ext_controls ctrls;
 970         struct v4l2_ext_control ctrl;
 971         unsigned int i;
 972         int ret;
 973
 974         /* Memory-to-memory pipelines have no external subdev. */
 975         if (pipe->input != NULL)
 976                 return 0;
 977
 978         for (i = 0; i < ARRAY_SIZE(ents); i++) {
 979                 /* Is the entity part of the pipeline? */
 980                 if (!media_entity_enum_test(&pipe->ent_enum, ents[i]))
 981                         continue;
 982
 983                 /* ISP entities have always sink pad == 0. Find source. */
 984                 source_pad = media_entity_remote_pad(&ents[i]->pads[0]);
 985                 if (source_pad == NULL)
 986                         continue;
 987
 988                 source = source_pad->entity;
 989                 sink = ents[i];
 990                 break;
 991         }
 992
 993         if (!source) {
 994                 dev_warn(isp->dev, "can't find source, failing now\n");
 995                 return -EINVAL;
 996         }
 997
 998         if (!is_media_entity_v4l2_subdev(source))
 999                 return 0;
1000
1001         pipe->external = media_entity_to_v4l2_subdev(source);
1002
1003         fmt.pad = source_pad->index;
1004         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
1005         ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink),
1006                                pad, get_fmt, NULL, &fmt);
1007         if (unlikely(ret < 0)) {
1008                 dev_warn(isp->dev, "get_fmt returned null!\n");
1009                 return ret;
1010         }
1011
1012         pipe->external_width =
1013                 omap3isp_video_format_info(fmt.format.code)->width;
1014
1015         memset(&ctrls, 0, sizeof(ctrls));
1016         memset(&ctrl, 0, sizeof(ctrl));
1017
1018         ctrl.id = V4L2_CID_PIXEL_RATE;
1019
1020         ctrls.count = 1;
1021         ctrls.controls = &ctrl;
1022         ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &video->video,
1023                                NULL, &ctrls);
1024         if (ret < 0) {
1025                 dev_warn(isp->dev, "no pixel rate control in subdev %s\n",
1026                          pipe->external->name);
1027                 return ret;
1028         }
1029
1030         pipe->external_rate = ctrl.value64;
1031
1032         if (media_entity_enum_test(&pipe->ent_enum,
1033                                    &isp->isp_ccdc.subdev.entity)) {
1034                 unsigned int rate = UINT_MAX;
1035                 /*
1036                  * Check that maximum allowed CCDC pixel rate isn't
1037                  * exceeded by the pixel rate.
1038                  */
1039                 omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate);
1040                 if (pipe->external_rate > rate)
1041                         return -ENOSPC;
1042         }
1043
1044         return 0;
1045 }
1046
1047 /*
1048  * Stream management
1049  *
1050  * Every ISP pipeline has a single input and a single output. The input can be
1051  * either a sensor or a video node. The output is always a video node.
1052  *
1053  * As every pipeline has an output video node, the ISP video objects at the
1054  * pipeline output stores the pipeline state. It tracks the streaming state of
1055  * both the input and output, as well as the availability of buffers.
1056  *
1057  * In sensor-to-memory mode, frames are always available at the pipeline input.
1058  * Starting the sensor usually requires I2C transfers and must be done in
1059  * interruptible context. The pipeline is started and stopped synchronously
1060  * to the stream on/off commands. All modules in the pipeline will get their
1061  * subdev set stream handler called. The module at the end of the pipeline must
1062  * delay starting the hardware until buffers are available at its output.
1063  *
1064  * In memory-to-memory mode, starting/stopping the stream requires
1065  * synchronization between the input and output. ISP modules can't be stopped
1066  * in the middle of a frame, and at least some of the modules seem to become
1067  * busy as soon as they're started, even if they don't receive a frame start
1068  * event. For that reason frames need to be processed in single-shot mode. The
1069  * driver needs to wait until a frame is completely processed and written to
1070  * memory before restarting the pipeline for the next frame. Pipelined
1071  * processing might be possible but requires more testing.
1072  *
1073  * Stream start must be delayed until buffers are available at both the input
1074  * and output. The pipeline must be started in the videobuf queue callback with
1075  * the buffers queue spinlock held. The modules subdev set stream operation must
1076  * not sleep.
1077  */
1078 static int
1079 isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1080 {
1081         struct isp_video_fh *vfh = to_isp_video_fh(fh);
1082         struct isp_video *video = video_drvdata(file);
1083         enum isp_pipeline_state state;
1084         struct isp_pipeline *pipe;
1085         unsigned long flags;
1086         int ret;
1087
1088         if (type != video->type)
1089                 return -EINVAL;
1090
1091         mutex_lock(&video->stream_lock);
1092
1093         /* Start streaming on the pipeline. No link touching an entity in the
1094          * pipeline can be activated or deactivated once streaming is started.
1095          */
1096         pipe = video->video.entity.pipe
1097              ? to_isp_pipeline(&video->video.entity) : &video->pipe;
1098
1099         ret = media_entity_enum_init(&pipe->ent_enum, &video->isp->media_dev);
1100         if (ret)
1101                 goto err_enum_init;
1102
1103         /* TODO: Implement PM QoS */
1104         pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]);
1105         pipe->max_rate = pipe->l3_ick;
1106
1107         ret = media_pipeline_start(&video->video.entity, &pipe->pipe);
1108         if (ret < 0)
1109                 goto err_pipeline_start;
1110
1111         /* Verify that the currently configured format matches the output of
1112          * the connected subdev.
1113          */
1114         ret = isp_video_check_format(video, vfh);
1115         if (ret < 0)
1116                 goto err_check_format;
1117
1118         video->bpl_padding = ret;
1119         video->bpl_value = vfh->format.fmt.pix.bytesperline;
1120
1121         ret = isp_video_get_graph_data(video, pipe);
1122         if (ret < 0)
1123                 goto err_check_format;
1124
1125         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1126                 state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT;
1127         else
1128                 state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT;
1129
1130         ret = isp_video_check_external_subdevs(video, pipe);
1131         if (ret < 0)
1132                 goto err_check_format;
1133
1134         pipe->error = false;
1135
1136         spin_lock_irqsave(&pipe->lock, flags);
1137         pipe->state &= ~ISP_PIPELINE_STREAM;
1138         pipe->state |= state;
1139         spin_unlock_irqrestore(&pipe->lock, flags);
1140
1141         /* Set the maximum time per frame as the value requested by userspace.
1142          * This is a soft limit that can be overridden if the hardware doesn't
1143          * support the request limit.
1144          */
1145         if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1146                 pipe->max_timeperframe = vfh->timeperframe;
1147
1148         video->queue = &vfh->queue;
1149         INIT_LIST_HEAD(&video->dmaqueue);
1150         atomic_set(&pipe->frame_number, -1);
1151         pipe->field = vfh->format.fmt.pix.field;
1152
1153         mutex_lock(&video->queue_lock);
1154         ret = vb2_streamon(&vfh->queue, type);
1155         mutex_unlock(&video->queue_lock);
1156         if (ret < 0)
1157                 goto err_check_format;
1158
1159         mutex_unlock(&video->stream_lock);
1160
1161         return 0;
1162
1163 err_check_format:
1164         media_pipeline_stop(&video->video.entity);
1165 err_pipeline_start:
1166         /* TODO: Implement PM QoS */
1167         /* The DMA queue must be emptied here, otherwise CCDC interrupts that
1168          * will get triggered the next time the CCDC is powered up will try to
1169          * access buffers that might have been freed but still present in the
1170          * DMA queue. This can easily get triggered if the above
1171          * omap3isp_pipeline_set_stream() call fails on a system with a
1172          * free-running sensor.
1173          */
1174         INIT_LIST_HEAD(&video->dmaqueue);
1175         video->queue = NULL;
1176
1177         media_entity_enum_cleanup(&pipe->ent_enum);
1178
1179 err_enum_init:
1180         mutex_unlock(&video->stream_lock);
1181
1182         return ret;
1183 }
1184
1185 static int
1186 isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
1187 {
1188         struct isp_video_fh *vfh = to_isp_video_fh(fh);
1189         struct isp_video *video = video_drvdata(file);
1190         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
1191         enum isp_pipeline_state state;
1192         unsigned int streaming;
1193         unsigned long flags;
1194
1195         if (type != video->type)
1196                 return -EINVAL;
1197
1198         mutex_lock(&video->stream_lock);
1199
1200         /* Make sure we're not streaming yet. */
1201         mutex_lock(&video->queue_lock);
1202         streaming = vb2_is_streaming(&vfh->queue);
1203         mutex_unlock(&video->queue_lock);
1204
1205         if (!streaming)
1206                 goto done;
1207
1208         /* Update the pipeline state. */
1209         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1210                 state = ISP_PIPELINE_STREAM_OUTPUT
1211                       | ISP_PIPELINE_QUEUE_OUTPUT;
1212         else
1213                 state = ISP_PIPELINE_STREAM_INPUT
1214                       | ISP_PIPELINE_QUEUE_INPUT;
1215
1216         spin_lock_irqsave(&pipe->lock, flags);
1217         pipe->state &= ~state;
1218         spin_unlock_irqrestore(&pipe->lock, flags);
1219
1220         /* Stop the stream. */
1221         omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED);
1222         omap3isp_video_cancel_stream(video);
1223
1224         mutex_lock(&video->queue_lock);
1225         vb2_streamoff(&vfh->queue, type);
1226         mutex_unlock(&video->queue_lock);
1227         video->queue = NULL;
1228         video->error = false;
1229
1230         /* TODO: Implement PM QoS */
1231         media_pipeline_stop(&video->video.entity);
1232
1233         media_entity_enum_cleanup(&pipe->ent_enum);
1234
1235 done:
1236         mutex_unlock(&video->stream_lock);
1237         return 0;
1238 }
1239
1240 static int
1241 isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
1242 {
1243         if (input->index > 0)
1244                 return -EINVAL;
1245
1246         strscpy(input->name, "camera", sizeof(input->name));
1247         input->type = V4L2_INPUT_TYPE_CAMERA;
1248
1249         return 0;
1250 }
1251
1252 static int
1253 isp_video_g_input(struct file *file, void *fh, unsigned int *input)
1254 {
1255         *input = 0;
1256
1257         return 0;
1258 }
1259
1260 static int
1261 isp_video_s_input(struct file *file, void *fh, unsigned int input)
1262 {
1263         return input == 0 ? 0 : -EINVAL;
1264 }
1265
1266 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
1267         .vidioc_querycap                = isp_video_querycap,
1268         .vidioc_g_fmt_vid_cap           = isp_video_get_format,
1269         .vidioc_s_fmt_vid_cap           = isp_video_set_format,
1270         .vidioc_try_fmt_vid_cap         = isp_video_try_format,
1271         .vidioc_g_fmt_vid_out           = isp_video_get_format,
1272         .vidioc_s_fmt_vid_out           = isp_video_set_format,
1273         .vidioc_try_fmt_vid_out         = isp_video_try_format,
1274         .vidioc_g_selection             = isp_video_get_selection,
1275         .vidioc_s_selection             = isp_video_set_selection,
1276         .vidioc_g_parm                  = isp_video_get_param,
1277         .vidioc_s_parm                  = isp_video_set_param,
1278         .vidioc_reqbufs                 = isp_video_reqbufs,
1279         .vidioc_querybuf                = isp_video_querybuf,
1280         .vidioc_qbuf                    = isp_video_qbuf,
1281         .vidioc_dqbuf                   = isp_video_dqbuf,
1282         .vidioc_streamon                = isp_video_streamon,
1283         .vidioc_streamoff               = isp_video_streamoff,
1284         .vidioc_enum_input              = isp_video_enum_input,
1285         .vidioc_g_input                 = isp_video_g_input,
1286         .vidioc_s_input                 = isp_video_s_input,
1287 };
1288
1289 /* -----------------------------------------------------------------------------
1290  * V4L2 file operations
1291  */
1292
1293 static int isp_video_open(struct file *file)
1294 {
1295         struct isp_video *video = video_drvdata(file);
1296         struct isp_video_fh *handle;
1297         struct vb2_queue *queue;
1298         int ret = 0;
1299
1300         handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1301         if (handle == NULL)
1302                 return -ENOMEM;
1303
1304         v4l2_fh_init(&handle->vfh, &video->video);
1305         v4l2_fh_add(&handle->vfh);
1306
1307         /* If this is the first user, initialise the pipeline. */
1308         if (omap3isp_get(video->isp) == NULL) {
1309                 ret = -EBUSY;
1310                 goto done;
1311         }
1312
1313         ret = v4l2_pipeline_pm_get(&video->video.entity);
1314         if (ret < 0) {
1315                 omap3isp_put(video->isp);
1316                 goto done;
1317         }
1318
1319         queue = &handle->queue;
1320         queue->type = video->type;
1321         queue->io_modes = VB2_MMAP | VB2_USERPTR;
1322         queue->drv_priv = handle;
1323         queue->ops = &isp_video_queue_ops;
1324         queue->mem_ops = &vb2_dma_contig_memops;
1325         queue->buf_struct_size = sizeof(struct isp_buffer);
1326         queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1327         queue->dev = video->isp->dev;
1328
1329         ret = vb2_queue_init(&handle->queue);
1330         if (ret < 0) {
1331                 omap3isp_put(video->isp);
1332                 goto done;
1333         }
1334
1335         memset(&handle->format, 0, sizeof(handle->format));
1336         handle->format.type = video->type;
1337         handle->timeperframe.denominator = 1;
1338
1339         handle->video = video;
1340         file->private_data = &handle->vfh;
1341
1342 done:
1343         if (ret < 0) {
1344                 v4l2_fh_del(&handle->vfh);
1345                 v4l2_fh_exit(&handle->vfh);
1346                 kfree(handle);
1347         }
1348
1349         return ret;
1350 }
1351
1352 static int isp_video_release(struct file *file)
1353 {
1354         struct isp_video *video = video_drvdata(file);
1355         struct v4l2_fh *vfh = file->private_data;
1356         struct isp_video_fh *handle = to_isp_video_fh(vfh);
1357
1358         /* Disable streaming and free the buffers queue resources. */
1359         isp_video_streamoff(file, vfh, video->type);
1360
1361         mutex_lock(&video->queue_lock);
1362         vb2_queue_release(&handle->queue);
1363         mutex_unlock(&video->queue_lock);
1364
1365         v4l2_pipeline_pm_put(&video->video.entity);
1366
1367         /* Release the file handle. */
1368         v4l2_fh_del(vfh);
1369         v4l2_fh_exit(vfh);
1370         kfree(handle);
1371         file->private_data = NULL;
1372
1373         omap3isp_put(video->isp);
1374
1375         return 0;
1376 }
1377
1378 static __poll_t isp_video_poll(struct file *file, poll_table *wait)
1379 {
1380         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1381         struct isp_video *video = video_drvdata(file);
1382         __poll_t ret;
1383
1384         mutex_lock(&video->queue_lock);
1385         ret = vb2_poll(&vfh->queue, file, wait);
1386         mutex_unlock(&video->queue_lock);
1387
1388         return ret;
1389 }
1390
1391 static int isp_video_mmap(struct file *file, struct vm_area_struct *vma)
1392 {
1393         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1394
1395         return vb2_mmap(&vfh->queue, vma);
1396 }
1397
1398 static const struct v4l2_file_operations isp_video_fops = {
1399         .owner = THIS_MODULE,
1400         .unlocked_ioctl = video_ioctl2,
1401         .open = isp_video_open,
1402         .release = isp_video_release,
1403         .poll = isp_video_poll,
1404         .mmap = isp_video_mmap,
1405 };
1406
1407 /* -----------------------------------------------------------------------------
1408  * ISP video core
1409  */
1410
1411 static const struct isp_video_operations isp_video_dummy_ops = {
1412 };
1413
1414 int omap3isp_video_init(struct isp_video *video, const char *name)
1415 {
1416         const char *direction;
1417         int ret;
1418
1419         switch (video->type) {
1420         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1421                 direction = "output";
1422                 video->pad.flags = MEDIA_PAD_FL_SINK
1423                                    | MEDIA_PAD_FL_MUST_CONNECT;
1424                 break;
1425         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1426                 direction = "input";
1427                 video->pad.flags = MEDIA_PAD_FL_SOURCE
1428                                    | MEDIA_PAD_FL_MUST_CONNECT;
1429                 video->video.vfl_dir = VFL_DIR_TX;
1430                 break;
1431
1432         default:
1433                 return -EINVAL;
1434         }
1435
1436         ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
1437         if (ret < 0)
1438                 return ret;
1439
1440         mutex_init(&video->mutex);
1441         atomic_set(&video->active, 0);
1442
1443         spin_lock_init(&video->pipe.lock);
1444         mutex_init(&video->stream_lock);
1445         mutex_init(&video->queue_lock);
1446         spin_lock_init(&video->irqlock);
1447
1448         /* Initialize the video device. */
1449         if (video->ops == NULL)
1450                 video->ops = &isp_video_dummy_ops;
1451
1452         video->video.fops = &isp_video_fops;
1453         snprintf(video->video.name, sizeof(video->video.name),
1454                  "OMAP3 ISP %s %s", name, direction);
1455         video->video.vfl_type = VFL_TYPE_VIDEO;
1456         video->video.release = video_device_release_empty;
1457         video->video.ioctl_ops = &isp_video_ioctl_ops;
1458         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1459                 video->video.device_caps = V4L2_CAP_VIDEO_CAPTURE
1460                                          | V4L2_CAP_STREAMING;
1461         else
1462                 video->video.device_caps = V4L2_CAP_VIDEO_OUTPUT
1463                                          | V4L2_CAP_STREAMING;
1464
1465         video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED;
1466
1467         video_set_drvdata(&video->video, video);
1468
1469         return 0;
1470 }
1471
1472 void omap3isp_video_cleanup(struct isp_video *video)
1473 {
1474         media_entity_cleanup(&video->video.entity);
1475         mutex_destroy(&video->queue_lock);
1476         mutex_destroy(&video->stream_lock);
1477         mutex_destroy(&video->mutex);
1478 }
1479
1480 int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev)
1481 {
1482         int ret;
1483
1484         video->video.v4l2_dev = vdev;
1485
1486         ret = video_register_device(&video->video, VFL_TYPE_VIDEO, -1);
1487         if (ret < 0)
1488                 dev_err(video->isp->dev,
1489                         "%s: could not register video device (%d)\n",
1490                         __func__, ret);
1491
1492         return ret;
1493 }
1494
1495 void omap3isp_video_unregister(struct isp_video *video)
1496 {
1497         video_unregister_device(&video->video);
1498 }