drivers/media/platform/omap3isp/ispvideo.c

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This source file includes following definitions.
omap3isp_video_format_info
isp_video_mbus_to_pix
isp_video_pix_to_mbus
isp_video_remote_subdev
isp_video_get_graph_data
__isp_video_get_format
isp_video_check_format
isp_video_queue_setup
isp_video_buffer_prepare
isp_video_buffer_queue
omap3isp_video_return_buffers
isp_video_start_streaming
omap3isp_video_buffer_next
omap3isp_video_cancel_stream
omap3isp_video_resume
isp_video_querycap
isp_video_get_format
isp_video_set_format
isp_video_try_format
isp_video_get_selection
isp_video_set_selection
isp_video_get_param
isp_video_set_param
isp_video_reqbufs
isp_video_querybuf
isp_video_qbuf
isp_video_dqbuf
isp_video_check_external_subdevs
isp_video_streamon
isp_video_streamoff
isp_video_enum_input
isp_video_g_input
isp_video_s_input
isp_video_open
isp_video_release
isp_video_poll
isp_video_mmap
omap3isp_video_init
omap3isp_video_cleanup
omap3isp_video_register
omap3isp_video_unregister
   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 <asm/cacheflush.h>
  14 #include <linux/clk.h>
  15 #include <linux/mm.h>
  16 #include <linux/module.h>
  17 #include <linux/pagemap.h>
  18 #include <linux/scatterlist.h>
  19 #include <linux/sched.h>
  20 #include <linux/slab.h>
  21 #include <linux/vmalloc.h>
  22 
  23 #include <media/v4l2-dev.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-mc.h>
  26 #include <media/videobuf2-dma-contig.h>
  27 
  28 #include "ispvideo.h"
  29 #include "isp.h"
  30 
  31 
  32 /* -----------------------------------------------------------------------------
  33  * Helper functions
  34  */
  35 
  36 /*
  37  * NOTE: When adding new media bus codes, always remember to add
  38  * corresponding in-memory formats to the table below!!!
  39  */
  40 static struct isp_format_info formats[] = {
  41         { MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
  42           MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
  43           V4L2_PIX_FMT_GREY, 8, 1, },
  44         { MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10,
  45           MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y8_1X8,
  46           V4L2_PIX_FMT_Y10, 10, 2, },
  47         { MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y10_1X10,
  48           MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y8_1X8,
  49           V4L2_PIX_FMT_Y12, 12, 2, },
  50         { MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
  51           MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
  52           V4L2_PIX_FMT_SBGGR8, 8, 1, },
  53         { MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
  54           MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
  55           V4L2_PIX_FMT_SGBRG8, 8, 1, },
  56         { MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
  57           MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
  58           V4L2_PIX_FMT_SGRBG8, 8, 1, },
  59         { MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
  60           MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
  61           V4L2_PIX_FMT_SRGGB8, 8, 1, },
  62         { MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8, MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
  63           MEDIA_BUS_FMT_SBGGR10_1X10, 0,
  64           V4L2_PIX_FMT_SBGGR10DPCM8, 8, 1, },
  65         { MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8, MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
  66           MEDIA_BUS_FMT_SGBRG10_1X10, 0,
  67           V4L2_PIX_FMT_SGBRG10DPCM8, 8, 1, },
  68         { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
  69           MEDIA_BUS_FMT_SGRBG10_1X10, 0,
  70           V4L2_PIX_FMT_SGRBG10DPCM8, 8, 1, },
  71         { MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8, MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
  72           MEDIA_BUS_FMT_SRGGB10_1X10, 0,
  73           V4L2_PIX_FMT_SRGGB10DPCM8, 8, 1, },
  74         { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10,
  75           MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR8_1X8,
  76           V4L2_PIX_FMT_SBGGR10, 10, 2, },
  77         { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10,
  78           MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG8_1X8,
  79           V4L2_PIX_FMT_SGBRG10, 10, 2, },
  80         { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10,
  81           MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG8_1X8,
  82           V4L2_PIX_FMT_SGRBG10, 10, 2, },
  83         { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10,
  84           MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB8_1X8,
  85           V4L2_PIX_FMT_SRGGB10, 10, 2, },
  86         { MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR10_1X10,
  87           MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR8_1X8,
  88           V4L2_PIX_FMT_SBGGR12, 12, 2, },
  89         { MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG10_1X10,
  90           MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG8_1X8,
  91           V4L2_PIX_FMT_SGBRG12, 12, 2, },
  92         { MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG10_1X10,
  93           MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG8_1X8,
  94           V4L2_PIX_FMT_SGRBG12, 12, 2, },
  95         { MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB10_1X10,
  96           MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB8_1X8,
  97           V4L2_PIX_FMT_SRGGB12, 12, 2, },
  98         { MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16,
  99           MEDIA_BUS_FMT_UYVY8_1X16, 0,
 100           V4L2_PIX_FMT_UYVY, 16, 2, },
 101         { MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16,
 102           MEDIA_BUS_FMT_YUYV8_1X16, 0,
 103           V4L2_PIX_FMT_YUYV, 16, 2, },
 104         { MEDIA_BUS_FMT_UYVY8_2X8, MEDIA_BUS_FMT_UYVY8_2X8,
 105           MEDIA_BUS_FMT_UYVY8_2X8, 0,
 106           V4L2_PIX_FMT_UYVY, 8, 2, },
 107         { MEDIA_BUS_FMT_YUYV8_2X8, MEDIA_BUS_FMT_YUYV8_2X8,
 108           MEDIA_BUS_FMT_YUYV8_2X8, 0,
 109           V4L2_PIX_FMT_YUYV, 8, 2, },
 110         /* Empty entry to catch the unsupported pixel code (0) used by the CCDC
 111          * module and avoid NULL pointer dereferences.
 112          */
 113         { 0, }
 114 };
 115 
 116 const struct isp_format_info *omap3isp_video_format_info(u32 code)
 117 {
 118         unsigned int i;
 119 
 120         for (i = 0; i < ARRAY_SIZE(formats); ++i) {
 121                 if (formats[i].code == code)
 122                         return &formats[i];
 123         }
 124 
 125         return NULL;
 126 }
 127 
 128 /*
 129  * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format
 130  * @video: ISP video instance
 131  * @mbus: v4l2_mbus_framefmt format (input)
 132  * @pix: v4l2_pix_format format (output)
 133  *
 134  * Fill the output pix structure with information from the input mbus format.
 135  * The bytesperline and sizeimage fields are computed from the requested bytes
 136  * per line value in the pix format and information from the video instance.
 137  *
 138  * Return the number of padding bytes at end of line.
 139  */
 140 static unsigned int isp_video_mbus_to_pix(const struct isp_video *video,
 141                                           const struct v4l2_mbus_framefmt *mbus,
 142                                           struct v4l2_pix_format *pix)
 143 {
 144         unsigned int bpl = pix->bytesperline;
 145         unsigned int min_bpl;
 146         unsigned int i;
 147 
 148         memset(pix, 0, sizeof(*pix));
 149         pix->width = mbus->width;
 150         pix->height = mbus->height;
 151 
 152         for (i = 0; i < ARRAY_SIZE(formats); ++i) {
 153                 if (formats[i].code == mbus->code)
 154                         break;
 155         }
 156 
 157         if (WARN_ON(i == ARRAY_SIZE(formats)))
 158                 return 0;
 159 
 160         min_bpl = pix->width * formats[i].bpp;
 161 
 162         /* Clamp the requested bytes per line value. If the maximum bytes per
 163          * line value is zero, the module doesn't support user configurable line
 164          * sizes. Override the requested value with the minimum in that case.
 165          */
 166         if (video->bpl_max)
 167                 bpl = clamp(bpl, min_bpl, video->bpl_max);
 168         else
 169                 bpl = min_bpl;
 170 
 171         if (!video->bpl_zero_padding || bpl != min_bpl)
 172                 bpl = ALIGN(bpl, video->bpl_alignment);
 173 
 174         pix->pixelformat = formats[i].pixelformat;
 175         pix->bytesperline = bpl;
 176         pix->sizeimage = pix->bytesperline * pix->height;
 177         pix->colorspace = mbus->colorspace;
 178         pix->field = mbus->field;
 179 
 180         return bpl - min_bpl;
 181 }
 182 
 183 static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix,
 184                                   struct v4l2_mbus_framefmt *mbus)
 185 {
 186         unsigned int i;
 187 
 188         memset(mbus, 0, sizeof(*mbus));
 189         mbus->width = pix->width;
 190         mbus->height = pix->height;
 191 
 192         /* Skip the last format in the loop so that it will be selected if no
 193          * match is found.
 194          */
 195         for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) {
 196                 if (formats[i].pixelformat == pix->pixelformat)
 197                         break;
 198         }
 199 
 200         mbus->code = formats[i].code;
 201         mbus->colorspace = pix->colorspace;
 202         mbus->field = pix->field;
 203 }
 204 
 205 static struct v4l2_subdev *
 206 isp_video_remote_subdev(struct isp_video *video, u32 *pad)
 207 {
 208         struct media_pad *remote;
 209 
 210         remote = media_entity_remote_pad(&video->pad);
 211 
 212         if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
 213                 return NULL;
 214 
 215         if (pad)
 216                 *pad = remote->index;
 217 
 218         return media_entity_to_v4l2_subdev(remote->entity);
 219 }
 220 
 221 /* Return a pointer to the ISP video instance at the far end of the pipeline. */
 222 static int isp_video_get_graph_data(struct isp_video *video,
 223                                     struct isp_pipeline *pipe)
 224 {
 225         struct media_graph graph;
 226         struct media_entity *entity = &video->video.entity;
 227         struct media_device *mdev = entity->graph_obj.mdev;
 228         struct isp_video *far_end = NULL;
 229         int ret;
 230 
 231         mutex_lock(&mdev->graph_mutex);
 232         ret = media_graph_walk_init(&graph, mdev);
 233         if (ret) {
 234                 mutex_unlock(&mdev->graph_mutex);
 235                 return ret;
 236         }
 237 
 238         media_graph_walk_start(&graph, entity);
 239 
 240         while ((entity = media_graph_walk_next(&graph))) {
 241                 struct isp_video *__video;
 242 
 243                 media_entity_enum_set(&pipe->ent_enum, entity);
 244 
 245                 if (far_end != NULL)
 246                         continue;
 247 
 248                 if (entity == &video->video.entity)
 249                         continue;
 250 
 251                 if (!is_media_entity_v4l2_video_device(entity))
 252                         continue;
 253 
 254                 __video = to_isp_video(media_entity_to_video_device(entity));
 255                 if (__video->type != video->type)
 256                         far_end = __video;
 257         }
 258 
 259         mutex_unlock(&mdev->graph_mutex);
 260 
 261         media_graph_walk_cleanup(&graph);
 262 
 263         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 264                 pipe->input = far_end;
 265                 pipe->output = video;
 266         } else {
 267                 if (far_end == NULL)
 268                         return -EPIPE;
 269 
 270                 pipe->input = video;
 271                 pipe->output = far_end;
 272         }
 273 
 274         return 0;
 275 }
 276 
 277 static int
 278 __isp_video_get_format(struct isp_video *video, struct v4l2_format *format)
 279 {
 280         struct v4l2_subdev_format fmt;
 281         struct v4l2_subdev *subdev;
 282         u32 pad;
 283         int ret;
 284 
 285         subdev = isp_video_remote_subdev(video, &pad);
 286         if (subdev == NULL)
 287                 return -EINVAL;
 288 
 289         fmt.pad = pad;
 290         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 291 
 292         mutex_lock(&video->mutex);
 293         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 294         mutex_unlock(&video->mutex);
 295 
 296         if (ret)
 297                 return ret;
 298 
 299         format->type = video->type;
 300         return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
 301 }
 302 
 303 static int
 304 isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh)
 305 {
 306         struct v4l2_format format;
 307         int ret;
 308 
 309         memcpy(&format, &vfh->format, sizeof(format));
 310         ret = __isp_video_get_format(video, &format);
 311         if (ret < 0)
 312                 return ret;
 313 
 314         if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat ||
 315             vfh->format.fmt.pix.height != format.fmt.pix.height ||
 316             vfh->format.fmt.pix.width != format.fmt.pix.width ||
 317             vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline ||
 318             vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage ||
 319             vfh->format.fmt.pix.field != format.fmt.pix.field)
 320                 return -EINVAL;
 321 
 322         return 0;
 323 }
 324 
 325 /* -----------------------------------------------------------------------------
 326  * Video queue operations
 327  */
 328 
 329 static int isp_video_queue_setup(struct vb2_queue *queue,
 330                                  unsigned int *count, unsigned int *num_planes,
 331                                  unsigned int sizes[], struct device *alloc_devs[])
 332 {
 333         struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
 334         struct isp_video *video = vfh->video;
 335 
 336         *num_planes = 1;
 337 
 338         sizes[0] = vfh->format.fmt.pix.sizeimage;
 339         if (sizes[0] == 0)
 340                 return -EINVAL;
 341 
 342         *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0]));
 343 
 344         return 0;
 345 }
 346 
 347 static int isp_video_buffer_prepare(struct vb2_buffer *buf)
 348 {
 349         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf);
 350         struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
 351         struct isp_buffer *buffer = to_isp_buffer(vbuf);
 352         struct isp_video *video = vfh->video;
 353         dma_addr_t addr;
 354 
 355         /* Refuse to prepare the buffer is the video node has registered an
 356          * error. We don't need to take any lock here as the operation is
 357          * inherently racy. The authoritative check will be performed in the
 358          * queue handler, which can't return an error, this check is just a best
 359          * effort to notify userspace as early as possible.
 360          */
 361         if (unlikely(video->error))
 362                 return -EIO;
 363 
 364         addr = vb2_dma_contig_plane_dma_addr(buf, 0);
 365         if (!IS_ALIGNED(addr, 32)) {
 366                 dev_dbg(video->isp->dev,
 367                         "Buffer address must be aligned to 32 bytes boundary.\n");
 368                 return -EINVAL;
 369         }
 370 
 371         vb2_set_plane_payload(&buffer->vb.vb2_buf, 0,
 372                               vfh->format.fmt.pix.sizeimage);
 373         buffer->dma = addr;
 374 
 375         return 0;
 376 }
 377 
 378 /*
 379  * isp_video_buffer_queue - Add buffer to streaming queue
 380  * @buf: Video buffer
 381  *
 382  * In memory-to-memory mode, start streaming on the pipeline if buffers are
 383  * queued on both the input and the output, if the pipeline isn't already busy.
 384  * If the pipeline is busy, it will be restarted in the output module interrupt
 385  * handler.
 386  */
 387 static void isp_video_buffer_queue(struct vb2_buffer *buf)
 388 {
 389         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf);
 390         struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
 391         struct isp_buffer *buffer = to_isp_buffer(vbuf);
 392         struct isp_video *video = vfh->video;
 393         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 394         enum isp_pipeline_state state;
 395         unsigned long flags;
 396         unsigned int empty;
 397         unsigned int start;
 398 
 399         spin_lock_irqsave(&video->irqlock, flags);
 400 
 401         if (unlikely(video->error)) {
 402                 vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 403                 spin_unlock_irqrestore(&video->irqlock, flags);
 404                 return;
 405         }
 406 
 407         empty = list_empty(&video->dmaqueue);
 408         list_add_tail(&buffer->irqlist, &video->dmaqueue);
 409 
 410         spin_unlock_irqrestore(&video->irqlock, flags);
 411 
 412         if (empty) {
 413                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 414                         state = ISP_PIPELINE_QUEUE_OUTPUT;
 415                 else
 416                         state = ISP_PIPELINE_QUEUE_INPUT;
 417 
 418                 spin_lock_irqsave(&pipe->lock, flags);
 419                 pipe->state |= state;
 420                 video->ops->queue(video, buffer);
 421                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 422 
 423                 start = isp_pipeline_ready(pipe);
 424                 if (start)
 425                         pipe->state |= ISP_PIPELINE_STREAM;
 426                 spin_unlock_irqrestore(&pipe->lock, flags);
 427 
 428                 if (start)
 429                         omap3isp_pipeline_set_stream(pipe,
 430                                                 ISP_PIPELINE_STREAM_SINGLESHOT);
 431         }
 432 }
 433 
 434 /*
 435  * omap3isp_video_return_buffers - Return all queued buffers to videobuf2
 436  * @video: ISP video object
 437  * @state: new state for the returned buffers
 438  *
 439  * Return all buffers queued on the video node to videobuf2 in the given state.
 440  * The buffer state should be VB2_BUF_STATE_QUEUED if called due to an error
 441  * when starting the stream, or VB2_BUF_STATE_ERROR otherwise.
 442  *
 443  * The function must be called with the video irqlock held.
 444  */
 445 static void omap3isp_video_return_buffers(struct isp_video *video,
 446                                           enum vb2_buffer_state state)
 447 {
 448         while (!list_empty(&video->dmaqueue)) {
 449                 struct isp_buffer *buf;
 450 
 451                 buf = list_first_entry(&video->dmaqueue,
 452                                        struct isp_buffer, irqlist);
 453                 list_del(&buf->irqlist);
 454                 vb2_buffer_done(&buf->vb.vb2_buf, state);
 455         }
 456 }
 457 
 458 static int isp_video_start_streaming(struct vb2_queue *queue,
 459                                      unsigned int count)
 460 {
 461         struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
 462         struct isp_video *video = vfh->video;
 463         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 464         unsigned long flags;
 465         int ret;
 466 
 467         /* In sensor-to-memory mode, the stream can be started synchronously
 468          * to the stream on command. In memory-to-memory mode, it will be
 469          * started when buffers are queued on both the input and output.
 470          */
 471         if (pipe->input)
 472                 return 0;
 473 
 474         ret = omap3isp_pipeline_set_stream(pipe,
 475                                            ISP_PIPELINE_STREAM_CONTINUOUS);
 476         if (ret < 0) {
 477                 spin_lock_irqsave(&video->irqlock, flags);
 478                 omap3isp_video_return_buffers(video, VB2_BUF_STATE_QUEUED);
 479                 spin_unlock_irqrestore(&video->irqlock, flags);
 480                 return ret;
 481         }
 482 
 483         spin_lock_irqsave(&video->irqlock, flags);
 484         if (list_empty(&video->dmaqueue))
 485                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 486         spin_unlock_irqrestore(&video->irqlock, flags);
 487 
 488         return 0;
 489 }
 490 
 491 static const struct vb2_ops isp_video_queue_ops = {
 492         .queue_setup = isp_video_queue_setup,
 493         .buf_prepare = isp_video_buffer_prepare,
 494         .buf_queue = isp_video_buffer_queue,
 495         .start_streaming = isp_video_start_streaming,
 496 };
 497 
 498 /*
 499  * omap3isp_video_buffer_next - Complete the current buffer and return the next
 500  * @video: ISP video object
 501  *
 502  * Remove the current video buffer from the DMA queue and fill its timestamp and
 503  * field count before handing it back to videobuf2.
 504  *
 505  * For capture video nodes the buffer state is set to VB2_BUF_STATE_DONE if no
 506  * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise.
 507  * For video output nodes the buffer state is always set to VB2_BUF_STATE_DONE.
 508  *
 509  * The DMA queue is expected to contain at least one buffer.
 510  *
 511  * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
 512  * empty.
 513  */
 514 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
 515 {
 516         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
 517         enum vb2_buffer_state vb_state;
 518         struct isp_buffer *buf;
 519         unsigned long flags;
 520 
 521         spin_lock_irqsave(&video->irqlock, flags);
 522         if (WARN_ON(list_empty(&video->dmaqueue))) {
 523                 spin_unlock_irqrestore(&video->irqlock, flags);
 524                 return NULL;
 525         }
 526 
 527         buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
 528                                irqlist);
 529         list_del(&buf->irqlist);
 530         spin_unlock_irqrestore(&video->irqlock, flags);
 531 
 532         buf->vb.vb2_buf.timestamp = ktime_get_ns();
 533 
 534         /* Do frame number propagation only if this is the output video node.
 535          * Frame number either comes from the CSI receivers or it gets
 536          * incremented here if H3A is not active.
 537          * Note: There is no guarantee that the output buffer will finish
 538          * first, so the input number might lag behind by 1 in some cases.
 539          */
 540         if (video == pipe->output && !pipe->do_propagation)
 541                 buf->vb.sequence =
 542                         atomic_inc_return(&pipe->frame_number);
 543         else
 544                 buf->vb.sequence = atomic_read(&pipe->frame_number);
 545 
 546         if (pipe->field != V4L2_FIELD_NONE)
 547                 buf->vb.sequence /= 2;
 548 
 549         buf->vb.field = pipe->field;
 550 
 551         /* Report pipeline errors to userspace on the capture device side. */
 552         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
 553                 vb_state = VB2_BUF_STATE_ERROR;
 554                 pipe->error = false;
 555         } else {
 556                 vb_state = VB2_BUF_STATE_DONE;
 557         }
 558 
 559         vb2_buffer_done(&buf->vb.vb2_buf, vb_state);
 560 
 561         spin_lock_irqsave(&video->irqlock, flags);
 562 
 563         if (list_empty(&video->dmaqueue)) {
 564                 enum isp_pipeline_state state;
 565 
 566                 spin_unlock_irqrestore(&video->irqlock, flags);
 567 
 568                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 569                         state = ISP_PIPELINE_QUEUE_OUTPUT
 570                               | ISP_PIPELINE_STREAM;
 571                 else
 572                         state = ISP_PIPELINE_QUEUE_INPUT
 573                               | ISP_PIPELINE_STREAM;
 574 
 575                 spin_lock_irqsave(&pipe->lock, flags);
 576                 pipe->state &= ~state;
 577                 if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS)
 578                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 579                 spin_unlock_irqrestore(&pipe->lock, flags);
 580                 return NULL;
 581         }
 582 
 583         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
 584                 spin_lock(&pipe->lock);
 585                 pipe->state &= ~ISP_PIPELINE_STREAM;
 586                 spin_unlock(&pipe->lock);
 587         }
 588 
 589         buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
 590                                irqlist);
 591 
 592         spin_unlock_irqrestore(&video->irqlock, flags);
 593 
 594         return buf;
 595 }
 596 
 597 /*
 598  * omap3isp_video_cancel_stream - Cancel stream on a video node
 599  * @video: ISP video object
 600  *
 601  * Cancelling a stream returns all buffers queued on the video node to videobuf2
 602  * in the erroneous state and makes sure no new buffer can be queued.
 603  */
 604 void omap3isp_video_cancel_stream(struct isp_video *video)
 605 {
 606         unsigned long flags;
 607 
 608         spin_lock_irqsave(&video->irqlock, flags);
 609         omap3isp_video_return_buffers(video, VB2_BUF_STATE_ERROR);
 610         video->error = true;
 611         spin_unlock_irqrestore(&video->irqlock, flags);
 612 }
 613 
 614 /*
 615  * omap3isp_video_resume - Perform resume operation on the buffers
 616  * @video: ISP video object
 617  * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise
 618  *
 619  * This function is intended to be used on suspend/resume scenario. It
 620  * requests video queue layer to discard buffers marked as DONE if it's in
 621  * continuous mode and requests ISP modules to queue again the ACTIVE buffer
 622  * if there's any.
 623  */
 624 void omap3isp_video_resume(struct isp_video *video, int continuous)
 625 {
 626         struct isp_buffer *buf = NULL;
 627 
 628         if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 629                 mutex_lock(&video->queue_lock);
 630                 vb2_discard_done(video->queue);
 631                 mutex_unlock(&video->queue_lock);
 632         }
 633 
 634         if (!list_empty(&video->dmaqueue)) {
 635                 buf = list_first_entry(&video->dmaqueue,
 636                                        struct isp_buffer, irqlist);
 637                 video->ops->queue(video, buf);
 638                 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED;
 639         } else {
 640                 if (continuous)
 641                         video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
 642         }
 643 }
 644 
 645 /* -----------------------------------------------------------------------------
 646  * V4L2 ioctls
 647  */
 648 
 649 static int
 650 isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 651 {
 652         struct isp_video *video = video_drvdata(file);
 653 
 654         strscpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver));
 655         strscpy(cap->card, video->video.name, sizeof(cap->card));
 656         strscpy(cap->bus_info, "media", sizeof(cap->bus_info));
 657 
 658         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
 659                 | V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
 660 
 661 
 662         return 0;
 663 }
 664 
 665 static int
 666 isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
 667 {
 668         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 669         struct isp_video *video = video_drvdata(file);
 670 
 671         if (format->type != video->type)
 672                 return -EINVAL;
 673 
 674         mutex_lock(&video->mutex);
 675         *format = vfh->format;
 676         mutex_unlock(&video->mutex);
 677 
 678         return 0;
 679 }
 680 
 681 static int
 682 isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
 683 {
 684         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 685         struct isp_video *video = video_drvdata(file);
 686         struct v4l2_mbus_framefmt fmt;
 687 
 688         if (format->type != video->type)
 689                 return -EINVAL;
 690 
 691         /* Replace unsupported field orders with sane defaults. */
 692         switch (format->fmt.pix.field) {
 693         case V4L2_FIELD_NONE:
 694                 /* Progressive is supported everywhere. */
 695                 break;
 696         case V4L2_FIELD_ALTERNATE:
 697                 /* ALTERNATE is not supported on output nodes. */
 698                 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 699                         format->fmt.pix.field = V4L2_FIELD_NONE;
 700                 break;
 701         case V4L2_FIELD_INTERLACED:
 702                 /* The ISP has no concept of video standard, select the
 703                  * top-bottom order when the unqualified interlaced order is
 704                  * requested.
 705                  */
 706                 format->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
 707                 /* Fall-through */
 708         case V4L2_FIELD_INTERLACED_TB:
 709         case V4L2_FIELD_INTERLACED_BT:
 710                 /* Interlaced orders are only supported at the CCDC output. */
 711                 if (video != &video->isp->isp_ccdc.video_out)
 712                         format->fmt.pix.field = V4L2_FIELD_NONE;
 713                 break;
 714         case V4L2_FIELD_TOP:
 715         case V4L2_FIELD_BOTTOM:
 716         case V4L2_FIELD_SEQ_TB:
 717         case V4L2_FIELD_SEQ_BT:
 718         default:
 719                 /* All other field orders are currently unsupported, default to
 720                  * progressive.
 721                  */
 722                 format->fmt.pix.field = V4L2_FIELD_NONE;
 723                 break;
 724         }
 725 
 726         /* Fill the bytesperline and sizeimage fields by converting to media bus
 727          * format and back to pixel format.
 728          */
 729         isp_video_pix_to_mbus(&format->fmt.pix, &fmt);
 730         isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
 731 
 732         mutex_lock(&video->mutex);
 733         vfh->format = *format;
 734         mutex_unlock(&video->mutex);
 735 
 736         return 0;
 737 }
 738 
 739 static int
 740 isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
 741 {
 742         struct isp_video *video = video_drvdata(file);
 743         struct v4l2_subdev_format fmt;
 744         struct v4l2_subdev *subdev;
 745         u32 pad;
 746         int ret;
 747 
 748         if (format->type != video->type)
 749                 return -EINVAL;
 750 
 751         subdev = isp_video_remote_subdev(video, &pad);
 752         if (subdev == NULL)
 753                 return -EINVAL;
 754 
 755         isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
 756 
 757         fmt.pad = pad;
 758         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 759         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 760         if (ret)
 761                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 762 
 763         isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
 764         return 0;
 765 }
 766 
 767 static int
 768 isp_video_get_selection(struct file *file, void *fh, struct v4l2_selection *sel)
 769 {
 770         struct isp_video *video = video_drvdata(file);
 771         struct v4l2_subdev_format format;
 772         struct v4l2_subdev *subdev;
 773         struct v4l2_subdev_selection sdsel = {
 774                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 775                 .target = sel->target,
 776         };
 777         u32 pad;
 778         int ret;
 779 
 780         switch (sel->target) {
 781         case V4L2_SEL_TGT_CROP:
 782         case V4L2_SEL_TGT_CROP_BOUNDS:
 783         case V4L2_SEL_TGT_CROP_DEFAULT:
 784                 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 785                         return -EINVAL;
 786                 break;
 787         case V4L2_SEL_TGT_COMPOSE:
 788         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 789         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 790                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 791                         return -EINVAL;
 792                 break;
 793         default:
 794                 return -EINVAL;
 795         }
 796         subdev = isp_video_remote_subdev(video, &pad);
 797         if (subdev == NULL)
 798                 return -EINVAL;
 799 
 800         /* Try the get selection operation first and fallback to get format if not
 801          * implemented.
 802          */
 803         sdsel.pad = pad;
 804         ret = v4l2_subdev_call(subdev, pad, get_selection, NULL, &sdsel);
 805         if (!ret)
 806                 sel->r = sdsel.r;
 807         if (ret != -ENOIOCTLCMD)
 808                 return ret;
 809 
 810         format.pad = pad;
 811         format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 812         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
 813         if (ret < 0)
 814                 return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 815 
 816         sel->r.left = 0;
 817         sel->r.top = 0;
 818         sel->r.width = format.format.width;
 819         sel->r.height = format.format.height;
 820 
 821         return 0;
 822 }
 823 
 824 static int
 825 isp_video_set_selection(struct file *file, void *fh, struct v4l2_selection *sel)
 826 {
 827         struct isp_video *video = video_drvdata(file);
 828         struct v4l2_subdev *subdev;
 829         struct v4l2_subdev_selection sdsel = {
 830                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 831                 .target = sel->target,
 832                 .flags = sel->flags,
 833                 .r = sel->r,
 834         };
 835         u32 pad;
 836         int ret;
 837 
 838         switch (sel->target) {
 839         case V4L2_SEL_TGT_CROP:
 840                 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 841                         return -EINVAL;
 842                 break;
 843         case V4L2_SEL_TGT_COMPOSE:
 844                 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 845                         return -EINVAL;
 846                 break;
 847         default:
 848                 return -EINVAL;
 849         }
 850         subdev = isp_video_remote_subdev(video, &pad);
 851         if (subdev == NULL)
 852                 return -EINVAL;
 853 
 854         sdsel.pad = pad;
 855         mutex_lock(&video->mutex);
 856         ret = v4l2_subdev_call(subdev, pad, set_selection, NULL, &sdsel);
 857         mutex_unlock(&video->mutex);
 858         if (!ret)
 859                 sel->r = sdsel.r;
 860 
 861         return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
 862 }
 863 
 864 static int
 865 isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 866 {
 867         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 868         struct isp_video *video = video_drvdata(file);
 869 
 870         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 871             video->type != a->type)
 872                 return -EINVAL;
 873 
 874         memset(a, 0, sizeof(*a));
 875         a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 876         a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
 877         a->parm.output.timeperframe = vfh->timeperframe;
 878 
 879         return 0;
 880 }
 881 
 882 static int
 883 isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
 884 {
 885         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 886         struct isp_video *video = video_drvdata(file);
 887 
 888         if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 889             video->type != a->type)
 890                 return -EINVAL;
 891 
 892         if (a->parm.output.timeperframe.denominator == 0)
 893                 a->parm.output.timeperframe.denominator = 1;
 894 
 895         vfh->timeperframe = a->parm.output.timeperframe;
 896 
 897         return 0;
 898 }
 899 
 900 static int
 901 isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
 902 {
 903         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 904         struct isp_video *video = video_drvdata(file);
 905         int ret;
 906 
 907         mutex_lock(&video->queue_lock);
 908         ret = vb2_reqbufs(&vfh->queue, rb);
 909         mutex_unlock(&video->queue_lock);
 910 
 911         return ret;
 912 }
 913 
 914 static int
 915 isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
 916 {
 917         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 918         struct isp_video *video = video_drvdata(file);
 919         int ret;
 920 
 921         mutex_lock(&video->queue_lock);
 922         ret = vb2_querybuf(&vfh->queue, b);
 923         mutex_unlock(&video->queue_lock);
 924 
 925         return ret;
 926 }
 927 
 928 static int
 929 isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 930 {
 931         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 932         struct isp_video *video = video_drvdata(file);
 933         int ret;
 934 
 935         mutex_lock(&video->queue_lock);
 936         ret = vb2_qbuf(&vfh->queue, video->video.v4l2_dev->mdev, b);
 937         mutex_unlock(&video->queue_lock);
 938 
 939         return ret;
 940 }
 941 
 942 static int
 943 isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
 944 {
 945         struct isp_video_fh *vfh = to_isp_video_fh(fh);
 946         struct isp_video *video = video_drvdata(file);
 947         int ret;
 948 
 949         mutex_lock(&video->queue_lock);
 950         ret = vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK);
 951         mutex_unlock(&video->queue_lock);
 952 
 953         return ret;
 954 }
 955 
 956 static int isp_video_check_external_subdevs(struct isp_video *video,
 957                                             struct isp_pipeline *pipe)
 958 {
 959         struct isp_device *isp = video->isp;
 960         struct media_entity *ents[] = {
 961                 &isp->isp_csi2a.subdev.entity,
 962                 &isp->isp_csi2c.subdev.entity,
 963                 &isp->isp_ccp2.subdev.entity,
 964                 &isp->isp_ccdc.subdev.entity
 965         };
 966         struct media_pad *source_pad;
 967         struct media_entity *source = NULL;
 968         struct media_entity *sink;
 969         struct v4l2_subdev_format fmt;
 970         struct v4l2_ext_controls ctrls;
 971         struct v4l2_ext_control ctrl;
 972         unsigned int i;
 973         int ret;
 974 
 975         /* Memory-to-memory pipelines have no external subdev. */
 976         if (pipe->input != NULL)
 977                 return 0;
 978 
 979         for (i = 0; i < ARRAY_SIZE(ents); i++) {
 980                 /* Is the entity part of the pipeline? */
 981                 if (!media_entity_enum_test(&pipe->ent_enum, ents[i]))
 982                         continue;
 983 
 984                 /* ISP entities have always sink pad == 0. Find source. */
 985                 source_pad = media_entity_remote_pad(&ents[i]->pads[0]);
 986                 if (source_pad == NULL)
 987                         continue;
 988 
 989                 source = source_pad->entity;
 990                 sink = ents[i];
 991                 break;
 992         }
 993 
 994         if (!source) {
 995                 dev_warn(isp->dev, "can't find source, failing now\n");
 996                 return -EINVAL;
 997         }
 998 
 999         if (!is_media_entity_v4l2_subdev(source))
1000                 return 0;
1001 
1002         pipe->external = media_entity_to_v4l2_subdev(source);
1003 
1004         fmt.pad = source_pad->index;
1005         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
1006         ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink),
1007                                pad, get_fmt, NULL, &fmt);
1008         if (unlikely(ret < 0)) {
1009                 dev_warn(isp->dev, "get_fmt returned null!\n");
1010                 return ret;
1011         }
1012 
1013         pipe->external_width =
1014                 omap3isp_video_format_info(fmt.format.code)->width;
1015 
1016         memset(&ctrls, 0, sizeof(ctrls));
1017         memset(&ctrl, 0, sizeof(ctrl));
1018 
1019         ctrl.id = V4L2_CID_PIXEL_RATE;
1020 
1021         ctrls.count = 1;
1022         ctrls.controls = &ctrl;
1023         ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &video->video,
1024                                NULL, &ctrls);
1025         if (ret < 0) {
1026                 dev_warn(isp->dev, "no pixel rate control in subdev %s\n",
1027                          pipe->external->name);
1028                 return ret;
1029         }
1030 
1031         pipe->external_rate = ctrl.value64;
1032 
1033         if (media_entity_enum_test(&pipe->ent_enum,
1034                                    &isp->isp_ccdc.subdev.entity)) {
1035                 unsigned int rate = UINT_MAX;
1036                 /*
1037                  * Check that maximum allowed CCDC pixel rate isn't
1038                  * exceeded by the pixel rate.
1039                  */
1040                 omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate);
1041                 if (pipe->external_rate > rate)
1042                         return -ENOSPC;
1043         }
1044 
1045         return 0;
1046 }
1047 
1048 /*
1049  * Stream management
1050  *
1051  * Every ISP pipeline has a single input and a single output. The input can be
1052  * either a sensor or a video node. The output is always a video node.
1053  *
1054  * As every pipeline has an output video node, the ISP video objects at the
1055  * pipeline output stores the pipeline state. It tracks the streaming state of
1056  * both the input and output, as well as the availability of buffers.
1057  *
1058  * In sensor-to-memory mode, frames are always available at the pipeline input.
1059  * Starting the sensor usually requires I2C transfers and must be done in
1060  * interruptible context. The pipeline is started and stopped synchronously
1061  * to the stream on/off commands. All modules in the pipeline will get their
1062  * subdev set stream handler called. The module at the end of the pipeline must
1063  * delay starting the hardware until buffers are available at its output.
1064  *
1065  * In memory-to-memory mode, starting/stopping the stream requires
1066  * synchronization between the input and output. ISP modules can't be stopped
1067  * in the middle of a frame, and at least some of the modules seem to become
1068  * busy as soon as they're started, even if they don't receive a frame start
1069  * event. For that reason frames need to be processed in single-shot mode. The
1070  * driver needs to wait until a frame is completely processed and written to
1071  * memory before restarting the pipeline for the next frame. Pipelined
1072  * processing might be possible but requires more testing.
1073  *
1074  * Stream start must be delayed until buffers are available at both the input
1075  * and output. The pipeline must be started in the videobuf queue callback with
1076  * the buffers queue spinlock held. The modules subdev set stream operation must
1077  * not sleep.
1078  */
1079 static int
1080 isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1081 {
1082         struct isp_video_fh *vfh = to_isp_video_fh(fh);
1083         struct isp_video *video = video_drvdata(file);
1084         enum isp_pipeline_state state;
1085         struct isp_pipeline *pipe;
1086         unsigned long flags;
1087         int ret;
1088 
1089         if (type != video->type)
1090                 return -EINVAL;
1091 
1092         mutex_lock(&video->stream_lock);
1093 
1094         /* Start streaming on the pipeline. No link touching an entity in the
1095          * pipeline can be activated or deactivated once streaming is started.
1096          */
1097         pipe = video->video.entity.pipe
1098              ? to_isp_pipeline(&video->video.entity) : &video->pipe;
1099 
1100         ret = media_entity_enum_init(&pipe->ent_enum, &video->isp->media_dev);
1101         if (ret)
1102                 goto err_enum_init;
1103 
1104         /* TODO: Implement PM QoS */
1105         pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]);
1106         pipe->max_rate = pipe->l3_ick;
1107 
1108         ret = media_pipeline_start(&video->video.entity, &pipe->pipe);
1109         if (ret < 0)
1110                 goto err_pipeline_start;
1111 
1112         /* Verify that the currently configured format matches the output of
1113          * the connected subdev.
1114          */
1115         ret = isp_video_check_format(video, vfh);
1116         if (ret < 0)
1117                 goto err_check_format;
1118 
1119         video->bpl_padding = ret;
1120         video->bpl_value = vfh->format.fmt.pix.bytesperline;
1121 
1122         ret = isp_video_get_graph_data(video, pipe);
1123         if (ret < 0)
1124                 goto err_check_format;
1125 
1126         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1127                 state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT;
1128         else
1129                 state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT;
1130 
1131         ret = isp_video_check_external_subdevs(video, pipe);
1132         if (ret < 0)
1133                 goto err_check_format;
1134 
1135         pipe->error = false;
1136 
1137         spin_lock_irqsave(&pipe->lock, flags);
1138         pipe->state &= ~ISP_PIPELINE_STREAM;
1139         pipe->state |= state;
1140         spin_unlock_irqrestore(&pipe->lock, flags);
1141 
1142         /* Set the maximum time per frame as the value requested by userspace.
1143          * This is a soft limit that can be overridden if the hardware doesn't
1144          * support the request limit.
1145          */
1146         if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1147                 pipe->max_timeperframe = vfh->timeperframe;
1148 
1149         video->queue = &vfh->queue;
1150         INIT_LIST_HEAD(&video->dmaqueue);
1151         atomic_set(&pipe->frame_number, -1);
1152         pipe->field = vfh->format.fmt.pix.field;
1153 
1154         mutex_lock(&video->queue_lock);
1155         ret = vb2_streamon(&vfh->queue, type);
1156         mutex_unlock(&video->queue_lock);
1157         if (ret < 0)
1158                 goto err_check_format;
1159 
1160         mutex_unlock(&video->stream_lock);
1161 
1162         return 0;
1163 
1164 err_check_format:
1165         media_pipeline_stop(&video->video.entity);
1166 err_pipeline_start:
1167         /* TODO: Implement PM QoS */
1168         /* The DMA queue must be emptied here, otherwise CCDC interrupts that
1169          * will get triggered the next time the CCDC is powered up will try to
1170          * access buffers that might have been freed but still present in the
1171          * DMA queue. This can easily get triggered if the above
1172          * omap3isp_pipeline_set_stream() call fails on a system with a
1173          * free-running sensor.
1174          */
1175         INIT_LIST_HEAD(&video->dmaqueue);
1176         video->queue = NULL;
1177 
1178         media_entity_enum_cleanup(&pipe->ent_enum);
1179 
1180 err_enum_init:
1181         mutex_unlock(&video->stream_lock);
1182 
1183         return ret;
1184 }
1185 
1186 static int
1187 isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
1188 {
1189         struct isp_video_fh *vfh = to_isp_video_fh(fh);
1190         struct isp_video *video = video_drvdata(file);
1191         struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
1192         enum isp_pipeline_state state;
1193         unsigned int streaming;
1194         unsigned long flags;
1195 
1196         if (type != video->type)
1197                 return -EINVAL;
1198 
1199         mutex_lock(&video->stream_lock);
1200 
1201         /* Make sure we're not streaming yet. */
1202         mutex_lock(&video->queue_lock);
1203         streaming = vb2_is_streaming(&vfh->queue);
1204         mutex_unlock(&video->queue_lock);
1205 
1206         if (!streaming)
1207                 goto done;
1208 
1209         /* Update the pipeline state. */
1210         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1211                 state = ISP_PIPELINE_STREAM_OUTPUT
1212                       | ISP_PIPELINE_QUEUE_OUTPUT;
1213         else
1214                 state = ISP_PIPELINE_STREAM_INPUT
1215                       | ISP_PIPELINE_QUEUE_INPUT;
1216 
1217         spin_lock_irqsave(&pipe->lock, flags);
1218         pipe->state &= ~state;
1219         spin_unlock_irqrestore(&pipe->lock, flags);
1220 
1221         /* Stop the stream. */
1222         omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED);
1223         omap3isp_video_cancel_stream(video);
1224 
1225         mutex_lock(&video->queue_lock);
1226         vb2_streamoff(&vfh->queue, type);
1227         mutex_unlock(&video->queue_lock);
1228         video->queue = NULL;
1229         video->error = false;
1230 
1231         /* TODO: Implement PM QoS */
1232         media_pipeline_stop(&video->video.entity);
1233 
1234         media_entity_enum_cleanup(&pipe->ent_enum);
1235 
1236 done:
1237         mutex_unlock(&video->stream_lock);
1238         return 0;
1239 }
1240 
1241 static int
1242 isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
1243 {
1244         if (input->index > 0)
1245                 return -EINVAL;
1246 
1247         strscpy(input->name, "camera", sizeof(input->name));
1248         input->type = V4L2_INPUT_TYPE_CAMERA;
1249 
1250         return 0;
1251 }
1252 
1253 static int
1254 isp_video_g_input(struct file *file, void *fh, unsigned int *input)
1255 {
1256         *input = 0;
1257 
1258         return 0;
1259 }
1260 
1261 static int
1262 isp_video_s_input(struct file *file, void *fh, unsigned int input)
1263 {
1264         return input == 0 ? 0 : -EINVAL;
1265 }
1266 
1267 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
1268         .vidioc_querycap                = isp_video_querycap,
1269         .vidioc_g_fmt_vid_cap           = isp_video_get_format,
1270         .vidioc_s_fmt_vid_cap           = isp_video_set_format,
1271         .vidioc_try_fmt_vid_cap         = isp_video_try_format,
1272         .vidioc_g_fmt_vid_out           = isp_video_get_format,
1273         .vidioc_s_fmt_vid_out           = isp_video_set_format,
1274         .vidioc_try_fmt_vid_out         = isp_video_try_format,
1275         .vidioc_g_selection             = isp_video_get_selection,
1276         .vidioc_s_selection             = isp_video_set_selection,
1277         .vidioc_g_parm                  = isp_video_get_param,
1278         .vidioc_s_parm                  = isp_video_set_param,
1279         .vidioc_reqbufs                 = isp_video_reqbufs,
1280         .vidioc_querybuf                = isp_video_querybuf,
1281         .vidioc_qbuf                    = isp_video_qbuf,
1282         .vidioc_dqbuf                   = isp_video_dqbuf,
1283         .vidioc_streamon                = isp_video_streamon,
1284         .vidioc_streamoff               = isp_video_streamoff,
1285         .vidioc_enum_input              = isp_video_enum_input,
1286         .vidioc_g_input                 = isp_video_g_input,
1287         .vidioc_s_input                 = isp_video_s_input,
1288 };
1289 
1290 /* -----------------------------------------------------------------------------
1291  * V4L2 file operations
1292  */
1293 
1294 static int isp_video_open(struct file *file)
1295 {
1296         struct isp_video *video = video_drvdata(file);
1297         struct isp_video_fh *handle;
1298         struct vb2_queue *queue;
1299         int ret = 0;
1300 
1301         handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1302         if (handle == NULL)
1303                 return -ENOMEM;
1304 
1305         v4l2_fh_init(&handle->vfh, &video->video);
1306         v4l2_fh_add(&handle->vfh);
1307 
1308         /* If this is the first user, initialise the pipeline. */
1309         if (omap3isp_get(video->isp) == NULL) {
1310                 ret = -EBUSY;
1311                 goto done;
1312         }
1313 
1314         ret = v4l2_pipeline_pm_use(&video->video.entity, 1);
1315         if (ret < 0) {
1316                 omap3isp_put(video->isp);
1317                 goto done;
1318         }
1319 
1320         queue = &handle->queue;
1321         queue->type = video->type;
1322         queue->io_modes = VB2_MMAP | VB2_USERPTR;
1323         queue->drv_priv = handle;
1324         queue->ops = &isp_video_queue_ops;
1325         queue->mem_ops = &vb2_dma_contig_memops;
1326         queue->buf_struct_size = sizeof(struct isp_buffer);
1327         queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1328         queue->dev = video->isp->dev;
1329 
1330         ret = vb2_queue_init(&handle->queue);
1331         if (ret < 0) {
1332                 omap3isp_put(video->isp);
1333                 goto done;
1334         }
1335 
1336         memset(&handle->format, 0, sizeof(handle->format));
1337         handle->format.type = video->type;
1338         handle->timeperframe.denominator = 1;
1339 
1340         handle->video = video;
1341         file->private_data = &handle->vfh;
1342 
1343 done:
1344         if (ret < 0) {
1345                 v4l2_fh_del(&handle->vfh);
1346                 v4l2_fh_exit(&handle->vfh);
1347                 kfree(handle);
1348         }
1349 
1350         return ret;
1351 }
1352 
1353 static int isp_video_release(struct file *file)
1354 {
1355         struct isp_video *video = video_drvdata(file);
1356         struct v4l2_fh *vfh = file->private_data;
1357         struct isp_video_fh *handle = to_isp_video_fh(vfh);
1358 
1359         /* Disable streaming and free the buffers queue resources. */
1360         isp_video_streamoff(file, vfh, video->type);
1361 
1362         mutex_lock(&video->queue_lock);
1363         vb2_queue_release(&handle->queue);
1364         mutex_unlock(&video->queue_lock);
1365 
1366         v4l2_pipeline_pm_use(&video->video.entity, 0);
1367 
1368         /* Release the file handle. */
1369         v4l2_fh_del(vfh);
1370         v4l2_fh_exit(vfh);
1371         kfree(handle);
1372         file->private_data = NULL;
1373 
1374         omap3isp_put(video->isp);
1375 
1376         return 0;
1377 }
1378 
1379 static __poll_t isp_video_poll(struct file *file, poll_table *wait)
1380 {
1381         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1382         struct isp_video *video = video_drvdata(file);
1383         __poll_t ret;
1384 
1385         mutex_lock(&video->queue_lock);
1386         ret = vb2_poll(&vfh->queue, file, wait);
1387         mutex_unlock(&video->queue_lock);
1388 
1389         return ret;
1390 }
1391 
1392 static int isp_video_mmap(struct file *file, struct vm_area_struct *vma)
1393 {
1394         struct isp_video_fh *vfh = to_isp_video_fh(file->private_data);
1395 
1396         return vb2_mmap(&vfh->queue, vma);
1397 }
1398 
1399 static const struct v4l2_file_operations isp_video_fops = {
1400         .owner = THIS_MODULE,
1401         .unlocked_ioctl = video_ioctl2,
1402         .open = isp_video_open,
1403         .release = isp_video_release,
1404         .poll = isp_video_poll,
1405         .mmap = isp_video_mmap,
1406 };
1407 
1408 /* -----------------------------------------------------------------------------
1409  * ISP video core
1410  */
1411 
1412 static const struct isp_video_operations isp_video_dummy_ops = {
1413 };
1414 
1415 int omap3isp_video_init(struct isp_video *video, const char *name)
1416 {
1417         const char *direction;
1418         int ret;
1419 
1420         switch (video->type) {
1421         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1422                 direction = "output";
1423                 video->pad.flags = MEDIA_PAD_FL_SINK
1424                                    | MEDIA_PAD_FL_MUST_CONNECT;
1425                 break;
1426         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1427                 direction = "input";
1428                 video->pad.flags = MEDIA_PAD_FL_SOURCE
1429                                    | MEDIA_PAD_FL_MUST_CONNECT;
1430                 video->video.vfl_dir = VFL_DIR_TX;
1431                 break;
1432 
1433         default:
1434                 return -EINVAL;
1435         }
1436 
1437         ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
1438         if (ret < 0)
1439                 return ret;
1440 
1441         mutex_init(&video->mutex);
1442         atomic_set(&video->active, 0);
1443 
1444         spin_lock_init(&video->pipe.lock);
1445         mutex_init(&video->stream_lock);
1446         mutex_init(&video->queue_lock);
1447         spin_lock_init(&video->irqlock);
1448 
1449         /* Initialize the video device. */
1450         if (video->ops == NULL)
1451                 video->ops = &isp_video_dummy_ops;
1452 
1453         video->video.fops = &isp_video_fops;
1454         snprintf(video->video.name, sizeof(video->video.name),
1455                  "OMAP3 ISP %s %s", name, direction);
1456         video->video.vfl_type = VFL_TYPE_GRABBER;
1457         video->video.release = video_device_release_empty;
1458         video->video.ioctl_ops = &isp_video_ioctl_ops;
1459         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1460                 video->video.device_caps = V4L2_CAP_VIDEO_CAPTURE
1461                                          | V4L2_CAP_STREAMING;
1462         else
1463                 video->video.device_caps = V4L2_CAP_VIDEO_OUTPUT
1464                                          | V4L2_CAP_STREAMING;
1465 
1466         video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED;
1467 
1468         video_set_drvdata(&video->video, video);
1469 
1470         return 0;
1471 }
1472 
1473 void omap3isp_video_cleanup(struct isp_video *video)
1474 {
1475         media_entity_cleanup(&video->video.entity);
1476         mutex_destroy(&video->queue_lock);
1477         mutex_destroy(&video->stream_lock);
1478         mutex_destroy(&video->mutex);
1479 }
1480 
1481 int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev)
1482 {
1483         int ret;
1484 
1485         video->video.v4l2_dev = vdev;
1486 
1487         ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1488         if (ret < 0)
1489                 dev_err(video->isp->dev,
1490                         "%s: could not register video device (%d)\n",
1491                         __func__, ret);
1492 
1493         return ret;
1494 }
1495 
1496 void omap3isp_video_unregister(struct isp_video *video)
1497 {
1498         video_unregister_device(&video->video);
1499 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/media/platform/omap3isp/ispvideo.c

DEFINITIONS
