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
  16 #include <asm/cacheflush.h>
  17 #include <linux/clk.h>
  18 #include <linux/mm.h>
  19 #include <linux/module.h>
  20 #include <linux/pagemap.h>
  21 #include <linux/scatterlist.h>
  22 #include <linux/sched.h>
  23 #include <linux/slab.h>
  24 #include <linux/vmalloc.h>
  25 #include <media/v4l2-dev.h>
  26 #include <media/v4l2-ioctl.h>
  27 #include <media/videobuf2-dma-contig.h>
  28
  29 #include "ispvideo.h"
  30 #include "isp.h"
  31
  32
  33 /* -----------------------------------------------------------------------------
  34  * Helper functions
  35  */
  36
  37 /*
  38  * NOTE: When adding new media bus codes, always remember to add
  39  * corresponding in-memory formats to the table below!!!
  40  */
  41 static struct isp_format_info formats[] = {
  42         { MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
  43           MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
  44           V4L2_PIX_FMT_GREY, 8, 1, },
  45         { MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10,
  46           MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y8_1X8,
  47           V4L2_PIX_FMT_Y10, 10, 2, },
  48         { MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y10_1X10,
  49           MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y8_1X8,
  50           V4L2_PIX_FMT_Y12, 12, 2, },
  51         { MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
  52           MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
  53           V4L2_PIX_FMT_SBGGR8, 8, 1, },
  54         { MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
  55           MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
  56           V4L2_PIX_FMT_SGBRG8, 8, 1, },
  57         { MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
  58           MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
  59           V4L2_PIX_FMT_SGRBG8, 8, 1, },
  60         { MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
  61           MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
  62           V4L2_PIX_FMT_SRGGB8, 8, 1, },
  63         { MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8, MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
  64           MEDIA_BUS_FMT_SBGGR10_1X10, 0,
  65           V4L2_PIX_FMT_SBGGR10DPCM8, 8, 1, },
  66         { MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8, MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
  67           MEDIA_BUS_FMT_SGBRG10_1X10, 0,
  68           V4L2_PIX_FMT_SGBRG10DPCM8, 8, 1, },
  69         { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
  70           MEDIA_BUS_FMT_SGRBG10_1X10, 0,
  71           V4L2_PIX_FMT_SGRBG10DPCM8, 8, 1, },
  72         { MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8, MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
  73           MEDIA_BUS_FMT_SRGGB10_1X10, 0,
  74           V4L2_PIX_FMT_SRGGB10DPCM8, 8, 1, },
  75         { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10,
  76           MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR8_1X8,
  77           V4L2_PIX_FMT_SBGGR10, 10, 2, },
  78         { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10,
  79           MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG8_1X8,
  80           V4L2_PIX_FMT_SGBRG10, 10, 2, },
  81         { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10,
  82           MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG8_1X8,
  83           V4L2_PIX_FMT_SGRBG10, 10, 2, },
  84         { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10,
  85           MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB8_1X8,
  86           V4L2_PIX_FMT_SRGGB10, 10, 2, },
  87         { MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR10_1X10,
  88           MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR8_1X8,
  89           V4L2_PIX_FMT_SBGGR12, 12, 2, },
  90         { MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG10_1X10,
  91           MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG8_1X8,
  92           V4L2_PIX_FMT_SGBRG12, 12, 2, },
  93         { MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG10_1X10,
  94           MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG8_1X8,
  95           V4L2_PIX_FMT_SGRBG12, 12, 2, },
  96         { MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB10_1X10,
  97           MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB8_1X8,
  98           V4L2_PIX_FMT_SRGGB12, 12, 2, },
  99         { MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16,
 100           MEDIA_BUS_FMT_UYVY8_1X16, 0,
 101           V4L2_PIX_FMT_UYVY, 16, 2, },
 102         { MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16,
 103           MEDIA_BUS_FMT_YUYV8_1X16, 0,
 104           V4L2_PIX_FMT_YUYV, 16, 2, },
 105         { MEDIA_BUS_FMT_UYVY8_2X8, MEDIA_BUS_FMT_UYVY8_2X8,
 106           MEDIA_BUS_FMT_UYVY8_2X8, 0,
 107           V4L2_PIX_FMT_UYVY, 8, 2, },
 108         { MEDIA_BUS_FMT_YUYV8_2X8, MEDIA_BUS_FMT_YUYV8_2X8,
 109           MEDIA_BUS_FMT_YUYV8_2X8, 0,
 110           V4L2_PIX_FMT_YUYV, 8, 2, },
 111         /* Empty entry to catch the unsupported pixel code (0) used by the CCDC
 112          * module and avoid NULL pointer dereferences.
 113          */
 114         { 0, }
 115 };
 116
 117 const struct isp_format_info *omap3isp_video_format_info(u32 code)
 118 {
 119         unsigned int i;
 120
 121         for (i = 0; i < ARRAY_SIZE(formats); ++i) {
 122                 if (formats[i].code == code)
 123                         return &formats[i];
 124         }
 125
 126         return NULL;
 127 }
 128
 129 /*
 130  * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format
 131  * @video: ISP video instance
 132  * @mbus: v4l2_mbus_framefmt format (input)
 133  * @pix: v4l2_pix_format format (output)
 134  *
 135  * Fill the output pix structure with information from the input mbus format.
 136  * The bytesperline and sizeimage fields are computed from the requested bytes
 137  * per line value in the pix format and information from the video instance.
 138  *
 139  * Return the number of padding bytes at end of line.
 140  */
 141 static unsigned int isp_video_mbus_to_pix(const struct isp_video *video,
 142                                           const struct v4l2_mbus_framefmt *mbus,
 143                                           struct v4l2_pix_format *pix)
 144 {
 145         unsigned int bpl = pix->bytesperline;
 146         unsigned int min_bpl;
 147         unsigned int i;
 148
 149         memset(pix, 0, sizeof(*pix));
 150         pix->width = mbus->width;
 151         pix->height = mbus->height;
 152
 153         for (i = 0; i < ARRAY_SIZE(formats); ++i) {
 154                 if (formats[i].code == mbus->code)
 155                         break;
 156         }
 157
 158         if (WARN_ON(i == ARRAY_SIZE(formats)))
 159                 return 0;
 160
 161         min_bpl = pix->width * formats[i].bpp;
 162
 163         /* Clamp the requested bytes per line value. If the maximum bytes per
 164          * line value is zero, the module doesn't support user configurable line
 165          * sizes. Override the requested value with the minimum in that case.
 166          */
 167         if (video->bpl_max)
 168                 bpl = clamp(bpl, min_bpl, video->bpl_max);
 169         else
 170                 bpl = min_bpl;
 171
 172         if (!video->bpl_zero_padding || bpl != min_bpl)
 173                 bpl = ALIGN(bpl, video->bpl_alignment);
 174
 175         pix->pixelformat = formats[i].pixelformat;
 176         pix->bytesperline = bpl;
 177         pix->sizeimage = pix->bytesperline * pix->height;
 178         pix->colorspace = mbus->colorspace;
 179         pix->field = mbus->field;
 180
 181         return bpl - min_bpl;
 182 }
 183
 184 static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix,
 185                                   struct v4l2_mbus_framefmt *mbus)
 186 {
 187         unsigned int i;
 188
 189         memset(mbus, 0, sizeof(*mbus));
 190         mbus->width = pix->width;
 191         mbus->height = pix->height;
 192
 193         /* Skip the last format in the loop so that it will be selected if no
 194          * match is found.
 195          */
 196         for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) {
 197                 if (formats[i].pixelformat == pix->pixelformat)
 198                         break;
 199         }
 200
 201         mbus->code = formats[i].code;
 202         mbus->colorspace = pix->colorspace;
 203         mbus->field = pix->field;
 204 }
 205
 206 static struct v4l2_subdev *
 207 isp_video_remote_subdev(struct isp_video *video, u32 *pad)
 208 {
 209         struct media_pad *remote;
 210
 211         remote = media_entity_remote_pad(&video->pad);
 212
 213         if (remote == NULL ||
 214             media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 215                 return NULL;
 216
 217         if (pad)
 218                 *pad = remote->index;
 219
 220         return media_entity_to_v4l2_subdev(remote->entity);
 221 }
 222
 223 /* Return a pointer to the ISP video instance at the far end of the pipeline. */
 224 static int isp_video_get_graph_data(struct isp_video *video,
 225                                     struct isp_pipeline *pipe)
 226 {
 227         struct media_entity_graph graph;
 228         struct media_entity *entity = &video->video.entity;
 229         struct media_device *mdev = entity->parent;
 230         struct isp_video *far_end = NULL;
 231
 232         mutex_lock(&mdev->graph_mutex);
 233         media_entity_graph_walk_start(&graph, entity);
 234
 235         while ((entity = media_entity_graph_walk_next(&graph))) {
 236                 struct isp_video *__video;
 237
 238                 pipe->entities |= 1 << entity->id;
 239
 240                 if (far_end != NULL)
 241                         continue;
 242
 243                 if (entity == &video->video.entity)
 244                         continue;
 245
 246                 if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
 247                         continue;
 248
 249                 __video = to_isp_video(media_entity_to_video_device(entity));
 250                 if (__video->type != video->type)
 251                         far_end = __video;
 252         }
 253
 254         mutex_unlock(&mdev->graph_mutex);
 255
 256         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 257                 pipe->input = far_end;
 258                 pipe->output = video;
 259         } else {
 260                 if (far_end == NULL)
 261                         return -EPIPE;
 262
 263                 pipe->input = video;
 264                 pipe->output = far_end;
 265         }
 266
 267         return 0;
 268 }
 269
 270 static int
 271 __isp_video_get_format(struct isp_video *video, struct v4l2_format *format)
 272 {
 273         struct v4l2_subdev_format fmt;
 274         struct v4l2_subdev *subdev;
 275         u32 pad;
 276         int ret;
 277
 278         subdev = isp_video_remote_subdev(video, &pad);
 279         if (subdev == NULL)
 280                 return -EINVAL;
 281
 282         fmt.pad = pad;
 283         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 284
 285         mutex_lock(&video->mutex);
 286         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 287         mutex_unlock(&video->mutex);
 288
 289         if (ret)
 290                 return ret;
 291
 292         format->type = video->type;
 293         return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
 294 }
 295
 296 static int
 297 isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh)
 298 {
 299         struct v4l2_format format;
 300         int ret;
 301
 302         memcpy(&format, &vfh->format, sizeof(format));
 303         ret = __isp_video_get_format(video, &format);
 304         if (ret < 0)
 305                 return ret;
 306
 307         if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat ||
 308             vfh->format.fmt.pix.height != format.fmt.pix.height ||
 309             vfh->format.fmt.pix.width != format.fmt.pix.width ||
 310             vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline ||
 311             vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage ||
 312             vfh->format.fmt.pix.field != format.fmt.pix.field)
 313                 return -EINVAL;
 314
 315         return 0;
 316 }
 317
 318 /* -----------------------------------------------------------------------------
 319  * Video queue operations
 320  */
 321
 322 static int isp_video_queue_setup(struct vb2_queue *queue,
 323                                  const void *parg,
 324                                  unsigned int *count, unsigned int *num_planes,
 325                                  unsigned int sizes[], void *alloc_ctxs[])
 326 {
 327         struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
 328         struct isp_video *video = vfh->video;
 329
 330         *num_planes = 1;
 331
 332         sizes[0] = vfh->format.fmt.pix.sizeimage;
 333         if (sizes[0] == 0)
 334                 return -EINVAL;
 335
 336         alloc_ctxs[0] = video->alloc_ctx;
 337
 338         *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0]));
 339
 340         return 0;
 341 }
 342
 343 static int isp_video_buffer_prepare(struct vb2_buffer *buf)
 344 {
 345         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf);
 346         struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
 347         struct isp_buffer *buffer = to_isp_buffer(vbuf);
 348         struct isp_video *video = vfh->video;
 349         dma_addr_t addr;
 350
 351         /* Refuse to prepare the buffer is the video node has registered an
 352          * error. We don't need to take any lock here as the operation is
 353          * inherently racy. The authoritative check will be performed in the
 354          * queue handler, which can't return an error, this check is just a best
 355          * effort to notify userspace as early as possible.
 356          */
 357         if (unlikely(video->error))
 358                 return -EIO;
 359
 360         addr = vb2_dma_contig_plane_dma_addr(buf, 0);
 361         if (!IS_ALIGNED(addr, 32)) {
 362                 dev_dbg(video->isp->dev,
 363                         "Buffer address must be aligned to 32 bytes boundary.\n");
 364                 return -EINVAL;
 365         }
 366
 367         vb2_set_plane_payload(&buffer->vb.vb2_buf, 0,
 368                               vfh->format.fmt.pix.sizeimage);
 369         buffer->dma = addr;
 370
 371         return 0;
 372 }
 373
 374 /*
 375  * isp_video_buffer_queue - Add buffer to streaming queue
 376  * @buf: Video buffer
 377  *
 378  * In memory-to-memory mode, start streaming on the pipeline if buffers are
 379  * queued on both the input and the output, if the pipeline isn't already busy.
 380  * If the pipeline is busy, it will be restarted in the output module interrupt
 381  * handler.
 382  */
 383 static void isp_video_buffer_queue(struct vb2_buffer *buf)
 384 {
 385         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf);
 386         struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
 387         struct isp_buffer *buffer = to_isp_buffer(vbuf);
 388         struct isp_video *video = vfh->video;
 389         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 390         enum isp_pipeline_state state;
 391         unsigned long flags;
 392         unsigned int empty;
 393         unsigned int start;
 394
 395         spin_lock_irqsave(&video->irqlock, flags);
 396
 397         if (unlikely(video->error)) {
 398                 vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 399                 spin_unlock_irqrestore(&video->irqlock, flags);
 400                 return;
 401         }
 402
 403         empty = list_empty(&video->dmaqueue);
 404         list_add_tail(&buffer->irqlist, &video->dmaqueue);
 405
 406         spin_unlock_irqrestore(&video->irqlock, flags);
 407
 408         if (empty) {
 409                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 410                         state = ISP_PIPELINE_QUEUE_OUTPUT;
 411                 else
 412                         state = ISP_PIPELINE_QUEUE_INPUT;
 413
 414                 spin_lock_irqsave(&pipe->lock, flags);
 415                 pipe->state |= state;
 416                 video->ops->queue(video, buffer);
 417                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 418
 419                 start = isp_pipeline_ready(pipe);
 420                 if (start)
 421                         pipe->state |= ISP_PIPELINE_STREAM;
 422                 spin_unlock_irqrestore(&pipe->lock, flags);
 423
 424                 if (start)
 425                         omap3isp_pipeline_set_stream(pipe,
 426                                                 ISP_PIPELINE_STREAM_SINGLESHOT);
 427         }
 428 }
 429
 430 static const struct vb2_ops isp_video_queue_ops = {
 431         .queue_setup = isp_video_queue_setup,
 432         .buf_prepare = isp_video_buffer_prepare,
 433         .buf_queue = isp_video_buffer_queue,
 434 };
 435
 436 /*
 437  * omap3isp_video_buffer_next - Complete the current buffer and return the next
 438  * @video: ISP video object
 439  *
 440  * Remove the current video buffer from the DMA queue and fill its timestamp and
 441  * field count before handing it back to videobuf2.
 442  *
 443  * For capture video nodes the buffer state is set to VB2_BUF_STATE_DONE if no
 444  * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise.
 445  * For video output nodes the buffer state is always set to VB2_BUF_STATE_DONE.
 446  *
 447  * The DMA queue is expected to contain at least one buffer.
 448  *
 449  * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
 450  * empty.
 451  */
 452 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
 453 {
 454         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 455         enum isp_pipeline_state state;
 456         struct isp_buffer *buf;
 457         unsigned long flags;
 458
 459         spin_lock_irqsave(&video->irqlock, flags);
 460         if (WARN_ON(list_empty(&video->dmaqueue))) {
 461                 spin_unlock_irqrestore(&video->irqlock, flags);
 462                 return NULL;
 463         }
 464
 465         buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
 466                                irqlist);
 467         list_del(&buf->irqlist);
 468         spin_unlock_irqrestore(&video->irqlock, flags);
 469
 470         v4l2_get_timestamp(&buf->vb.timestamp);
 471
 472         /* Do frame number propagation only if this is the output video node.
 473          * Frame number either comes from the CSI receivers or it gets
 474          * incremented here if H3A is not active.
 475          * Note: There is no guarantee that the output buffer will finish
 476          * first, so the input number might lag behind by 1 in some cases.
 477          */
 478         if (video == pipe->output && !pipe->do_propagation)
 479                 buf->vb.sequence =
 480                         atomic_inc_return(&pipe->frame_number);
 481         else
 482                 buf->vb.sequence = atomic_read(&pipe->frame_number);
 483
 484         if (pipe->field != V4L2_FIELD_NONE)
 485                 buf->vb.sequence /= 2;
 486
 487         buf->vb.field = pipe->field;
 488
 489         /* Report pipeline errors to userspace on the capture device side. */
 490         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
 491                 state = VB2_BUF_STATE_ERROR;
 492                 pipe->error = false;
 493         } else {
 494                 state = VB2_BUF_STATE_DONE;
 495         }
 496
 497         vb2_buffer_done(&buf->vb.vb2_buf, state);
 498
 499         spin_lock_irqsave(&video->irqlock, flags);
 500
 501         if (list_empty(&video->dmaqueue)) {
 502                 spin_unlock_irqrestore(&video->irqlock, flags);
 503
 504                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 505                         state = ISP_PIPELINE_QUEUE_OUTPUT
 506                               | ISP_PIPELINE_STREAM;
 507                 else
 508                         state = ISP_PIPELINE_QUEUE_INPUT
 509                               | ISP_PIPELINE_STREAM;
 510
 511                 spin_lock_irqsave(&pipe->lock, flags);
 512                 pipe->state &= ~state;
 513                 if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS)
 514                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 515                 spin_unlock_irqrestore(&pipe->lock, flags);
 516                 return NULL;
 517         }
 518
 519         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
 520                 spin_lock(&pipe->lock);
 521                 pipe->state &= ~ISP_PIPELINE_STREAM;
 522                 spin_unlock(&pipe->lock);
 523         }
 524
 525         buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
 526                                irqlist);
 527
 528         spin_unlock_irqrestore(&video->irqlock, flags);
 529
 530         return buf;
 531 }
 532
 533 /*
 534  * omap3isp_video_cancel_stream - Cancel stream on a video node
 535  * @video: ISP video object
 536  *
 537  * Cancelling a stream mark all buffers on the video node as erroneous and makes
 538  * sure no new buffer can be queued.
 539  */
 540 void omap3isp_video_cancel_stream(struct isp_video *video)
 541 {
 542         unsigned long flags;
 543
 544         spin_lock_irqsave(&video->irqlock, flags);
 545
 546         while (!list_empty(&video->dmaqueue)) {
 547                 struct isp_buffer *buf;
 548
 549                 buf = list_first_entry(&video->dmaqueue,
 550                                        struct isp_buffer, irqlist);
 551                 list_del(&buf->irqlist);
 552                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 553         }
 554
 555         video->error = true;
 556
 557         spin_unlock_irqrestore(&video->irqlock, flags);
 558 }
 559
 560 /*
 561  * omap3isp_video_resume - Perform resume operation on the buffers
 562  * @video: ISP video object
 563  * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise
 564  *
 565  * This function is intended to be used on suspend/resume scenario. It
 566  * requests video queue layer to discard buffers marked as DONE if it's in
 567  * continuous mode and requests ISP modules to queue again the ACTIVE buffer
 568  * if there's any.
 569  */
 570 void omap3isp_video_resume(struct isp_video *video, int continuous)
 571 {
 572         struct isp_buffer *buf = NULL;
 573
 574         if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 575                 mutex_lock(&video->queue_lock);
 576                 vb2_discard_done(video->queue);
 577                 mutex_unlock(&video->queue_lock);
 578         }
 579
 580         if (!list_empty(&video->dmaqueue)) {
 581                 buf = list_first_entry(&video->dmaqueue,
 582                                        struct isp_buffer, irqlist);
 583                 video->ops->queue(video, buf);
 584                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 585         } else {
 586                 if (continuous)
 587                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 588         }
 589 }
 590
 591 /* -----------------------------------------------------------------------------
 592  * V4L2 ioctls
 593  */
 594
 595 static int
 596 isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 597 {
 598         struct isp_video *video = video_drvdata(file);
 599
 600         strlcpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver));
 601         strlcpy(cap->card, video->video.name, sizeof(cap->card));
 602         strlcpy(cap->bus_info, "media", sizeof(cap->bus_info));
 603
 604         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
 605                 | V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
 606
 607         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 608                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 609         else
 610                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 611
 612         return 0;
 613 }
 614
 615 static int
 616 isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 617 {
 618         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 619         struct isp_video *video = video_drvdata(file);
 620
 621         if (format->type != video->type)
 622                 return -EINVAL;
 623
 624         mutex_lock(&video->mutex);
 625         *format = vfh->format;
 626         mutex_unlock(&video->mutex);
 627
 628         return 0;
 629 }
 630
 631 static int
 632 isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 633 {
 634         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 635         struct isp_video *video = video_drvdata(file);
 636         struct v4l2_mbus_framefmt fmt;
 637
 638         if (format->type != video->type)
 639                 return -EINVAL;
 640
 641         /* Replace unsupported field orders with sane defaults. */
 642         switch (format->fmt.pix.field) {
 643         case V4L2_FIELD_NONE:
 644                 /* Progressive is supported everywhere. */
 645                 break;
 646         case V4L2_FIELD_ALTERNATE:
 647                 /* ALTERNATE is not supported on output nodes. */
 648                 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 649                         format->fmt.pix.field = V4L2_FIELD_NONE;
 650                 break;
 651         case V4L2_FIELD_INTERLACED:
 652                 /* The ISP has no concept of video standard, select the
 653                  * top-bottom order when the unqualified interlaced order is
 654                  * requested.
 655                  */
 656                 format->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
 657                 /* Fall-through */
 658         case V4L2_FIELD_INTERLACED_TB:
 659         case V4L2_FIELD_INTERLACED_BT:
 660                 /* Interlaced orders are only supported at the CCDC output. */
 661                 if (video != &video->isp->isp_ccdc.video_out)
 662                         format->fmt.pix.field = V4L2_FIELD_NONE;
 663                 break;
 664         case V4L2_FIELD_TOP:
 665         case V4L2_FIELD_BOTTOM:
 666         case V4L2_FIELD_SEQ_TB:
 667         case V4L2_FIELD_SEQ_BT:
 668         default:
 669                 /* All other field orders are currently unsupported, default to
 670                  * progressive.
 671                  */
 672                 format->fmt.pix.field = V4L2_FIELD_NONE;
 673                 break;
 674         }
 675
 676         /* Fill the bytesperline and sizeimage fields by converting to media bus
 677          * format and back to pixel format.
 678          */
 679         isp_video_pix_to_mbus(&format->fmt.pix, &fmt);
 680         isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
 681
 682         mutex_lock(&video->mutex);
 683         vfh->format = *format;
 684         mutex_unlock(&video->mutex);
 685
 686         return 0;
 687 }
 688
 689 static int
 690 isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 691 {
 692         struct isp_video *video = video_drvdata(file);
 693         struct v4l2_subdev_format fmt;
 694         struct v4l2_subdev *subdev;
 695         u32 pad;
 696         int ret;
 697
 698         if (format->type != video->type)
 699                 return -EINVAL;
 700
 701         subdev = isp_video_remote_subdev(video, &pad);
 702         if (subdev == NULL)
 703                 return -EINVAL;
 704
 705         isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
 706
 707         fmt.pad = pad;
 708         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 709         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 710         if (ret)
 711                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 712
 713         isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
 714         return 0;
 715 }
 716
 717 static int
 718 isp_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap)
 719 {
 720         struct isp_video *video = video_drvdata(file);
 721         struct v4l2_subdev *subdev;
 722         int ret;
 723
 724         subdev = isp_video_remote_subdev(video, NULL);
 725         if (subdev == NULL)
 726                 return -EINVAL;
 727
 728         mutex_lock(&video->mutex);
 729         ret = v4l2_subdev_call(subdev, video, cropcap, cropcap);
 730         mutex_unlock(&video->mutex);
 731
 732         return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 733 }
 734
 735 static int
 736 isp_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop)
 737 {
 738         struct isp_video *video = video_drvdata(file);
 739         struct v4l2_subdev_format format;
 740         struct v4l2_subdev *subdev;
 741         u32 pad;
 742         int ret;
 743
 744         subdev = isp_video_remote_subdev(video, &pad);
 745         if (subdev == NULL)
 746                 return -EINVAL;
 747
 748         /* Try the get crop operation first and fallback to get format if not
 749          * implemented.
 750          */
 751         ret = v4l2_subdev_call(subdev, video, g_crop, crop);
 752         if (ret != -ENOIOCTLCMD)
 753                 return ret;
 754
 755         format.pad = pad;
 756         format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 757         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
 758         if (ret < 0)
 759                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 760
 761         crop->c.left = 0;
 762         crop->c.top = 0;
 763         crop->c.width = format.format.width;
 764         crop->c.height = format.format.height;
 765
 766         return 0;
 767 }
 768
 769 static int
 770 isp_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
 771 {
 772         struct isp_video *video = video_drvdata(file);
 773         struct v4l2_subdev *subdev;
 774         int ret;
 775
 776         subdev = isp_video_remote_subdev(video, NULL);
 777         if (subdev == NULL)
 778                 return -EINVAL;
 779
 780         mutex_lock(&video->mutex);
 781         ret = v4l2_subdev_call(subdev, video, s_crop, crop);
 782         mutex_unlock(&video->mutex);
 783
 784         return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 785 }
 786
 787 static int
 788 isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 789 {
 790         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 791         struct isp_video *video = video_drvdata(file);
 792
 793         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 794             video->type != a->type)
 795                 return -EINVAL;
 796
 797         memset(a, 0, sizeof(*a));
 798         a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 799         a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
 800         a->parm.output.timeperframe = vfh->timeperframe;
 801
 802         return 0;
 803 }
 804
 805 static int
 806 isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 807 {
 808         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 809         struct isp_video *video = video_drvdata(file);
 810
 811         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 812             video->type != a->type)
 813                 return -EINVAL;
 814
 815         if (a->parm.output.timeperframe.denominator == 0)
 816                 a->parm.output.timeperframe.denominator = 1;
 817
 818         vfh->timeperframe = a->parm.output.timeperframe;
 819
 820         return 0;
 821 }
 822
 823 static int
 824 isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
 825 {
 826         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 827         struct isp_video *video = video_drvdata(file);
 828         int ret;
 829
 830         mutex_lock(&video->queue_lock);
 831         ret = vb2_reqbufs(&vfh->queue, rb);
 832         mutex_unlock(&video->queue_lock);
 833
 834         return ret;
 835 }
 836
 837 static int
 838 isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
 839 {
 840         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 841         struct isp_video *video = video_drvdata(file);
 842         int ret;
 843
 844         mutex_lock(&video->queue_lock);
 845         ret = vb2_querybuf(&vfh->queue, b);
 846         mutex_unlock(&video->queue_lock);
 847
 848         return ret;
 849 }
 850
 851 static int
 852 isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 853 {
 854         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 855         struct isp_video *video = video_drvdata(file);
 856         int ret;
 857
 858         mutex_lock(&video->queue_lock);
 859         ret = vb2_qbuf(&vfh->queue, b);
 860         mutex_unlock(&video->queue_lock);
 861
 862         return ret;
 863 }
 864
 865 static int
 866 isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 867 {
 868         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 869         struct isp_video *video = video_drvdata(file);
 870         int ret;
 871
 872         mutex_lock(&video->queue_lock);
 873         ret = vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK);
 874         mutex_unlock(&video->queue_lock);
 875
 876         return ret;
 877 }
 878
 879 static int isp_video_check_external_subdevs(struct isp_video *video,
 880                                             struct isp_pipeline *pipe)
 881 {
 882         struct isp_device *isp = video->isp;
 883         struct media_entity *ents[] = {
 884                 &isp->isp_csi2a.subdev.entity,
 885                 &isp->isp_csi2c.subdev.entity,
 886                 &isp->isp_ccp2.subdev.entity,
 887                 &isp->isp_ccdc.subdev.entity
 888         };
 889         struct media_pad *source_pad;
 890         struct media_entity *source = NULL;
 891         struct media_entity *sink;
 892         struct v4l2_subdev_format fmt;
 893         struct v4l2_ext_controls ctrls;
 894         struct v4l2_ext_control ctrl;
 895         unsigned int i;
 896         int ret;
 897
 898         /* Memory-to-memory pipelines have no external subdev. */
 899         if (pipe->input != NULL)
 900                 return 0;
 901
 902         for (i = 0; i < ARRAY_SIZE(ents); i++) {
 903                 /* Is the entity part of the pipeline? */
 904                 if (!(pipe->entities & (1 << ents[i]->id)))
 905                         continue;
 906
 907                 /* ISP entities have always sink pad == 0. Find source. */
 908                 source_pad = media_entity_remote_pad(&ents[i]->pads[0]);
 909                 if (source_pad == NULL)
 910                         continue;
 911
 912                 source = source_pad->entity;
 913                 sink = ents[i];
 914                 break;
 915         }
 916
 917         if (!source) {
 918                 dev_warn(isp->dev, "can't find source, failing now\n");
 919                 return -EINVAL;
 920         }
 921
 922         if (media_entity_type(source) != MEDIA_ENT_T_V4L2_SUBDEV)
 923                 return 0;
 924
 925         pipe->external = media_entity_to_v4l2_subdev(source);
 926
 927         fmt.pad = source_pad->index;
 928         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 929         ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink),
 930                                pad, get_fmt, NULL, &fmt);
 931         if (unlikely(ret < 0)) {
 932                 dev_warn(isp->dev, "get_fmt returned null!\n");
 933                 return ret;
 934         }
 935
 936         pipe->external_width =
 937                 omap3isp_video_format_info(fmt.format.code)->width;
 938
 939         memset(&ctrls, 0, sizeof(ctrls));
 940         memset(&ctrl, 0, sizeof(ctrl));
 941
 942         ctrl.id = V4L2_CID_PIXEL_RATE;
 943
 944         ctrls.count = 1;
 945         ctrls.controls = &ctrl;
 946
 947         ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &ctrls);
 948         if (ret < 0) {
 949                 dev_warn(isp->dev, "no pixel rate control in subdev %s\n",
 950                          pipe->external->name);
 951                 return ret;
 952         }
 953
 954         pipe->external_rate = ctrl.value64;
 955
 956         if (pipe->entities & (1 << isp->isp_ccdc.subdev.entity.id)) {
 957                 unsigned int rate = UINT_MAX;
 958                 /*
 959                  * Check that maximum allowed CCDC pixel rate isn't
 960                  * exceeded by the pixel rate.
 961                  */
 962                 omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate);
 963                 if (pipe->external_rate > rate)
 964                         return -ENOSPC;
 965         }
 966
 967         return 0;
 968 }
 969
 970 /*
 971  * Stream management
 972  *
 973  * Every ISP pipeline has a single input and a single output. The input can be
 974  * either a sensor or a video node. The output is always a video node.
 975  *
 976  * As every pipeline has an output video node, the ISP video objects at the
 977  * pipeline output stores the pipeline state. It tracks the streaming state of
 978  * both the input and output, as well as the availability of buffers.
 979  *
 980  * In sensor-to-memory mode, frames are always available at the pipeline input.
 981  * Starting the sensor usually requires I2C transfers and must be done in
 982  * interruptible context. The pipeline is started and stopped synchronously
 983  * to the stream on/off commands. All modules in the pipeline will get their
 984  * subdev set stream handler called. The module at the end of the pipeline must
 985  * delay starting the hardware until buffers are available at its output.
 986  *
 987  * In memory-to-memory mode, starting/stopping the stream requires
 988  * synchronization between the input and output. ISP modules can't be stopped
 989  * in the middle of a frame, and at least some of the modules seem to become
 990  * busy as soon as they're started, even if they don't receive a frame start
 991  * event. For that reason frames need to be processed in single-shot mode. The
 992  * driver needs to wait until a frame is completely processed and written to
 993  * memory before restarting the pipeline for the next frame. Pipelined
 994  * processing might be possible but requires more testing.
 995  *
 996  * Stream start must be delayed until buffers are available at both the input
 997  * and output. The pipeline must be started in the videobuf queue callback with
 998  * the buffers queue spinlock held. The modules subdev set stream operation must
 999  * not sleep.
1000  */
1001 static int
1002 isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1003 {
1004         struct isp_video_fh *vfh = to_isp_video_fh(fh);
1005         struct isp_video *video = video_drvdata(file);
1006         enum isp_pipeline_state state;
1007         struct isp_pipeline *pipe;
1008         unsigned long flags;
1009         int ret;
1010
1011         if (type != video->type)
1012                 return -EINVAL;
1013
1014         mutex_lock(&video->stream_lock);
1015
1016         /* Start streaming on the pipeline. No link touching an entity in the
1017          * pipeline can be activated or deactivated once streaming is started.
1018          */
1019         pipe = video->video.entity.pipe
1020              ? to_isp_pipeline(&video->video.entity) : &video->pipe;
1021
1022         pipe->entities = 0;
1023
1024         /* TODO: Implement PM QoS */
1025         pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]);
1026         pipe->max_rate = pipe->l3_ick;
1027
1028         ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
1029         if (ret < 0)
1030                 goto err_pipeline_start;
1031
1032         /* Verify that the currently configured format matches the output of
1033          * the connected subdev.
1034          */
1035         ret = isp_video_check_format(video, vfh);
1036         if (ret < 0)
1037                 goto err_check_format;
1038
1039         video->bpl_padding = ret;
1040         video->bpl_value = vfh->format.fmt.pix.bytesperline;
1041
1042         ret = isp_video_get_graph_data(video, pipe);
1043         if (ret < 0)
1044                 goto err_check_format;
1045
1046         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1047                 state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT;
1048         else
1049                 state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT;
1050
1051         ret = isp_video_check_external_subdevs(video, pipe);
1052         if (ret < 0)
1053                 goto err_check_format;
1054
1055         pipe->error = false;
1056
1057         spin_lock_irqsave(&pipe->lock, flags);
1058         pipe->state &= ~ISP_PIPELINE_STREAM;
1059         pipe->state |= state;
1060         spin_unlock_irqrestore(&pipe->lock, flags);
1061
1062         /* Set the maximum time per frame as the value requested by userspace.
1063          * This is a soft limit that can be overridden if the hardware doesn't
1064          * support the request limit.
1065          */
1066         if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1067                 pipe->max_timeperframe = vfh->timeperframe;
1068
1069         video->queue = &vfh->queue;
1070         INIT_LIST_HEAD(&video->dmaqueue);
1071         atomic_set(&pipe->frame_number, -1);
1072         pipe->field = vfh->format.fmt.pix.field;
1073
1074         mutex_lock(&video->queue_lock);
1075         ret = vb2_streamon(&vfh->queue, type);
1076         mutex_unlock(&video->queue_lock);
1077         if (ret < 0)
1078                 goto err_check_format;
1079
1080         /* In sensor-to-memory mode, the stream can be started synchronously
1081          * to the stream on command. In memory-to-memory mode, it will be
1082          * started when buffers are queued on both the input and output.
1083          */
1084         if (pipe->input == NULL) {
1085                 ret = omap3isp_pipeline_set_stream(pipe,
1086                                               ISP_PIPELINE_STREAM_CONTINUOUS);
1087                 if (ret < 0)
1088                         goto err_set_stream;
1089                 spin_lock_irqsave(&video->irqlock, flags);
1090                 if (list_empty(&video->dmaqueue))
1091                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
1092                 spin_unlock_irqrestore(&video->irqlock, flags);
1093         }
1094
1095         mutex_unlock(&video->stream_lock);
1096         return 0;
1097
1098 err_set_stream:
1099         mutex_lock(&video->queue_lock);
1100         vb2_streamoff(&vfh->queue, type);
1101         mutex_unlock(&video->queue_lock);
1102 err_check_format:
1103         media_entity_pipeline_stop(&video->video.entity);
1104 err_pipeline_start:
1105         /* TODO: Implement PM QoS */
1106         /* The DMA queue must be emptied here, otherwise CCDC interrupts that
1107          * will get triggered the next time the CCDC is powered up will try to
1108          * access buffers that might have been freed but still present in the
1109          * DMA queue. This can easily get triggered if the above
1110          * omap3isp_pipeline_set_stream() call fails on a system with a
1111          * free-running sensor.
1112          */
1113         INIT_LIST_HEAD(&video->dmaqueue);
1114         video->queue = NULL;
1115
1116         mutex_unlock(&video->stream_lock);
1117         return ret;
1118 }
1119
1120 static int
1121 isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
1122 {
1123         struct isp_video_fh *vfh = to_isp_video_fh(fh);
1124         struct isp_video *video = video_drvdata(file);
1125         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
1126         enum isp_pipeline_state state;
1127         unsigned int streaming;
1128         unsigned long flags;
1129
1130         if (type != video->type)
1131                 return -EINVAL;
1132
1133         mutex_lock(&video->stream_lock);
1134
1135         /* Make sure we're not streaming yet. */
1136         mutex_lock(&video->queue_lock);
1137         streaming = vb2_is_streaming(&vfh->queue);
1138         mutex_unlock(&video->queue_lock);
1139
1140         if (!streaming)
1141                 goto done;
1142
1143         /* Update the pipeline state. */
1144         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1145                 state = ISP_PIPELINE_STREAM_OUTPUT
1146                       | ISP_PIPELINE_QUEUE_OUTPUT;
1147         else
1148                 state = ISP_PIPELINE_STREAM_INPUT
1149                       | ISP_PIPELINE_QUEUE_INPUT;
1150
1151         spin_lock_irqsave(&pipe->lock, flags);
1152         pipe->state &= ~state;
1153         spin_unlock_irqrestore(&pipe->lock, flags);
1154
1155         /* Stop the stream. */
1156         omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED);
1157         omap3isp_video_cancel_stream(video);
1158
1159         mutex_lock(&video->queue_lock);
1160         vb2_streamoff(&vfh->queue, type);
1161         mutex_unlock(&video->queue_lock);
1162         video->queue = NULL;
1163         video->error = false;
1164
1165         /* TODO: Implement PM QoS */
1166         media_entity_pipeline_stop(&video->video.entity);
1167
1168 done:
1169         mutex_unlock(&video->stream_lock);
1170         return 0;
1171 }
1172
1173 static int
1174 isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
1175 {
1176         if (input->index > 0)
1177                 return -EINVAL;
1178
1179         strlcpy(input->name, "camera", sizeof(input->name));
1180         input->type = V4L2_INPUT_TYPE_CAMERA;
1181
1182         return 0;
1183 }
1184
1185 static int
1186 isp_video_g_input(struct file *file, void *fh, unsigned int *input)
1187 {
1188         *input = 0;
1189
1190         return 0;
1191 }
1192
1193 static int
1194 isp_video_s_input(struct file *file, void *fh, unsigned int input)
1195 {
1196         return input == 0 ? 0 : -EINVAL;
1197 }
1198
1199 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
1200         .vidioc_querycap                = isp_video_querycap,
1201         .vidioc_g_fmt_vid_cap           = isp_video_get_format,
1202         .vidioc_s_fmt_vid_cap           = isp_video_set_format,
1203         .vidioc_try_fmt_vid_cap         = isp_video_try_format,
1204         .vidioc_g_fmt_vid_out           = isp_video_get_format,
1205         .vidioc_s_fmt_vid_out           = isp_video_set_format,
1206         .vidioc_try_fmt_vid_out         = isp_video_try_format,
1207         .vidioc_cropcap                 = isp_video_cropcap,
1208         .vidioc_g_crop                  = isp_video_get_crop,
1209         .vidioc_s_crop                  = isp_video_set_crop,
1210         .vidioc_g_parm                  = isp_video_get_param,
1211         .vidioc_s_parm                  = isp_video_set_param,
1212         .vidioc_reqbufs                 = isp_video_reqbufs,
1213         .vidioc_querybuf                = isp_video_querybuf,
1214         .vidioc_qbuf                    = isp_video_qbuf,
1215         .vidioc_dqbuf                   = isp_video_dqbuf,
1216         .vidioc_streamon                = isp_video_streamon,
1217         .vidioc_streamoff               = isp_video_streamoff,
1218         .vidioc_enum_input              = isp_video_enum_input,
1219         .vidioc_g_input                 = isp_video_g_input,
1220         .vidioc_s_input                 = isp_video_s_input,
1221 };
1222
1223 /* -----------------------------------------------------------------------------
1224  * V4L2 file operations
1225  */
1226
1227 static int isp_video_open(struct file *file)
1228 {
1229         struct isp_video *video = video_drvdata(file);
1230         struct isp_video_fh *handle;
1231         struct vb2_queue *queue;
1232         int ret = 0;
1233
1234         handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1235         if (handle == NULL)
1236                 return -ENOMEM;
1237
1238         v4l2_fh_init(&handle->vfh, &video->video);
1239         v4l2_fh_add(&handle->vfh);
1240
1241         /* If this is the first user, initialise the pipeline. */
1242         if (omap3isp_get(video->isp) == NULL) {
1243                 ret = -EBUSY;
1244                 goto done;
1245         }
1246
1247         ret = omap3isp_pipeline_pm_use(&video->video.entity, 1);
1248         if (ret < 0) {
1249                 omap3isp_put(video->isp);
1250                 goto done;
1251         }
1252
1253         queue = &handle->queue;
1254         queue->type = video->type;
1255         queue->io_modes = VB2_MMAP | VB2_USERPTR;
1256         queue->drv_priv = handle;
1257         queue->ops = &isp_video_queue_ops;
1258         queue->mem_ops = &vb2_dma_contig_memops;
1259         queue->buf_struct_size = sizeof(struct isp_buffer);
1260         queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1261
1262         ret = vb2_queue_init(&handle->queue);
1263         if (ret < 0) {
1264                 omap3isp_put(video->isp);
1265                 goto done;
1266         }
1267
1268         memset(&handle->format, 0, sizeof(handle->format));
1269         handle->format.type = video->type;
1270         handle->timeperframe.denominator = 1;
1271
1272         handle->video = video;
1273         file->private_data = &handle->vfh;
1274
1275 done:
1276         if (ret < 0) {
1277                 v4l2_fh_del(&handle->vfh);
1278                 kfree(handle);
1279         }
1280
1281         return ret;
1282 }
1283
1284 static int isp_video_release(struct file *file)
1285 {
1286         struct isp_video *video = video_drvdata(file);
1287         struct v4l2_fh *vfh = file->private_data;
1288         struct isp_video_fh *handle = to_isp_video_fh(vfh);
1289
1290         /* Disable streaming and free the buffers queue resources. */
1291         isp_video_streamoff(file, vfh, video->type);
1292
1293         mutex_lock(&video->queue_lock);
1294         vb2_queue_release(&handle->queue);
1295         mutex_unlock(&video->queue_lock);
1296
1297         omap3isp_pipeline_pm_use(&video->video.entity, 0);
1298
1299         /* Release the file handle. */
1300         v4l2_fh_del(vfh);
1301         kfree(handle);
1302         file->private_data = NULL;
1303
1304         omap3isp_put(video->isp);
1305
1306         return 0;
1307 }
1308
1309 static unsigned int isp_video_poll(struct file *file, poll_table *wait)
1310 {
1311         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1312         struct isp_video *video = video_drvdata(file);
1313         int ret;
1314
1315         mutex_lock(&video->queue_lock);
1316         ret = vb2_poll(&vfh->queue, file, wait);
1317         mutex_unlock(&video->queue_lock);
1318
1319         return ret;
1320 }
1321
1322 static int isp_video_mmap(struct file *file, struct vm_area_struct *vma)
1323 {
1324         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1325
1326         return vb2_mmap(&vfh->queue, vma);
1327 }
1328
1329 static struct v4l2_file_operations isp_video_fops = {
1330         .owner = THIS_MODULE,
1331         .unlocked_ioctl = video_ioctl2,
1332         .open = isp_video_open,
1333         .release = isp_video_release,
1334         .poll = isp_video_poll,
1335         .mmap = isp_video_mmap,
1336 };
1337
1338 /* -----------------------------------------------------------------------------
1339  * ISP video core
1340  */
1341
1342 static const struct isp_video_operations isp_video_dummy_ops = {
1343 };
1344
1345 int omap3isp_video_init(struct isp_video *video, const char *name)
1346 {
1347         const char *direction;
1348         int ret;
1349
1350         switch (video->type) {
1351         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1352                 direction = "output";
1353                 video->pad.flags = MEDIA_PAD_FL_SINK
1354                                    | MEDIA_PAD_FL_MUST_CONNECT;
1355                 break;
1356         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1357                 direction = "input";
1358                 video->pad.flags = MEDIA_PAD_FL_SOURCE
1359                                    | MEDIA_PAD_FL_MUST_CONNECT;
1360                 video->video.vfl_dir = VFL_DIR_TX;
1361                 break;
1362
1363         default:
1364                 return -EINVAL;
1365         }
1366
1367         video->alloc_ctx = vb2_dma_contig_init_ctx(video->isp->dev);
1368         if (IS_ERR(video->alloc_ctx))
1369                 return PTR_ERR(video->alloc_ctx);
1370
1371         ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1372         if (ret < 0) {
1373                 vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1374                 return ret;
1375         }
1376
1377         mutex_init(&video->mutex);
1378         atomic_set(&video->active, 0);
1379
1380         spin_lock_init(&video->pipe.lock);
1381         mutex_init(&video->stream_lock);
1382         mutex_init(&video->queue_lock);
1383         spin_lock_init(&video->irqlock);
1384
1385         /* Initialize the video device. */
1386         if (video->ops == NULL)
1387                 video->ops = &isp_video_dummy_ops;
1388
1389         video->video.fops = &isp_video_fops;
1390         snprintf(video->video.name, sizeof(video->video.name),
1391                  "OMAP3 ISP %s %s", name, direction);
1392         video->video.vfl_type = VFL_TYPE_GRABBER;
1393         video->video.release = video_device_release_empty;
1394         video->video.ioctl_ops = &isp_video_ioctl_ops;
1395         video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED;
1396
1397         video_set_drvdata(&video->video, video);
1398
1399         return 0;
1400 }
1401
1402 void omap3isp_video_cleanup(struct isp_video *video)
1403 {
1404         vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1405         media_entity_cleanup(&video->video.entity);
1406         mutex_destroy(&video->queue_lock);
1407         mutex_destroy(&video->stream_lock);
1408         mutex_destroy(&video->mutex);
1409 }
1410
1411 int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev)
1412 {
1413         int ret;
1414
1415         video->video.v4l2_dev = vdev;
1416
1417         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1418         if (ret < 0)
1419                 dev_err(video->isp->dev,
1420                         "%s: could not register video device (%d)\n",
1421                         __func__, ret);
1422
1423         return ret;
1424 }
1425
1426 void omap3isp_video_unregister(struct isp_video *video)
1427 {
1428         if (video_is_registered(&video->video))
1429                 video_unregister_device(&video->video);
1430 }