4 * Copyright (C) 2013-2015 Ideas on Board
5 * Copyright (C) 2013-2015 Xilinx, Inc.
7 * Contacts: Hyun Kwon <hyun.kwon@xilinx.com>
8 * Laurent Pinchart <laurent.pinchart@ideasonboard.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/dma/xilinx_dma.h>
16 #include <linux/lcm.h>
17 #include <linux/list.h>
18 #include <linux/module.h>
20 #include <linux/slab.h>
22 #include <media/v4l2-dev.h>
23 #include <media/v4l2-fh.h>
24 #include <media/v4l2-ioctl.h>
25 #include <media/videobuf2-v4l2.h>
26 #include <media/videobuf2-dma-contig.h>
28 #include "xilinx-dma.h"
29 #include "xilinx-vip.h"
30 #include "xilinx-vipp.h"
32 #define XVIP_DMA_DEF_FORMAT V4L2_PIX_FMT_YUYV
33 #define XVIP_DMA_DEF_WIDTH 1920
34 #define XVIP_DMA_DEF_HEIGHT 1080
36 /* Minimum and maximum widths are expressed in bytes */
37 #define XVIP_DMA_MIN_WIDTH 1U
38 #define XVIP_DMA_MAX_WIDTH 65535U
39 #define XVIP_DMA_MIN_HEIGHT 1U
40 #define XVIP_DMA_MAX_HEIGHT 8191U
42 /* -----------------------------------------------------------------------------
46 static struct v4l2_subdev *
47 xvip_dma_remote_subdev(struct media_pad *local, u32 *pad)
49 struct media_pad *remote;
51 remote = media_entity_remote_pad(local);
53 media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
59 return media_entity_to_v4l2_subdev(remote->entity);
62 static int xvip_dma_verify_format(struct xvip_dma *dma)
64 struct v4l2_subdev_format fmt;
65 struct v4l2_subdev *subdev;
68 subdev = xvip_dma_remote_subdev(&dma->pad, &fmt.pad);
72 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
73 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
75 return ret == -ENOIOCTLCMD ? -EINVAL : ret;
77 if (dma->fmtinfo->code != fmt.format.code ||
78 dma->format.height != fmt.format.height ||
79 dma->format.width != fmt.format.width ||
80 dma->format.colorspace != fmt.format.colorspace)
86 /* -----------------------------------------------------------------------------
87 * Pipeline Stream Management
91 * xvip_pipeline_start_stop - Start ot stop streaming on a pipeline
93 * @start: Start (when true) or stop (when false) the pipeline
95 * Walk the entities chain starting at the pipeline output video node and start
96 * or stop all of them.
98 * Return: 0 if successful, or the return value of the failed video::s_stream
99 * operation otherwise.
101 static int xvip_pipeline_start_stop(struct xvip_pipeline *pipe, bool start)
103 struct xvip_dma *dma = pipe->output;
104 struct media_entity *entity;
105 struct media_pad *pad;
106 struct v4l2_subdev *subdev;
109 entity = &dma->video.entity;
111 pad = &entity->pads[0];
112 if (!(pad->flags & MEDIA_PAD_FL_SINK))
115 pad = media_entity_remote_pad(pad);
117 media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
120 entity = pad->entity;
121 subdev = media_entity_to_v4l2_subdev(entity);
123 ret = v4l2_subdev_call(subdev, video, s_stream, start);
124 if (start && ret < 0 && ret != -ENOIOCTLCMD)
132 * xvip_pipeline_set_stream - Enable/disable streaming on a pipeline
133 * @pipe: The pipeline
134 * @on: Turn the stream on when true or off when false
136 * The pipeline is shared between all DMA engines connect at its input and
137 * output. While the stream state of DMA engines can be controlled
138 * independently, pipelines have a shared stream state that enable or disable
139 * all entities in the pipeline. For this reason the pipeline uses a streaming
140 * counter that tracks the number of DMA engines that have requested the stream
143 * When called with the @on argument set to true, this function will increment
144 * the pipeline streaming count. If the streaming count reaches the number of
145 * DMA engines in the pipeline it will enable all entities that belong to the
148 * Similarly, when called with the @on argument set to false, this function will
149 * decrement the pipeline streaming count and disable all entities in the
150 * pipeline when the streaming count reaches zero.
152 * Return: 0 if successful, or the return value of the failed video::s_stream
153 * operation otherwise. Stopping the pipeline never fails. The pipeline state is
154 * not updated when the operation fails.
156 static int xvip_pipeline_set_stream(struct xvip_pipeline *pipe, bool on)
160 mutex_lock(&pipe->lock);
163 if (pipe->stream_count == pipe->num_dmas - 1) {
164 ret = xvip_pipeline_start_stop(pipe, true);
168 pipe->stream_count++;
170 if (--pipe->stream_count == 0)
171 xvip_pipeline_start_stop(pipe, false);
175 mutex_unlock(&pipe->lock);
179 static int xvip_pipeline_validate(struct xvip_pipeline *pipe,
180 struct xvip_dma *start)
182 struct media_entity_graph graph;
183 struct media_entity *entity = &start->video.entity;
184 struct media_device *mdev = entity->parent;
185 unsigned int num_inputs = 0;
186 unsigned int num_outputs = 0;
188 mutex_lock(&mdev->graph_mutex);
190 /* Walk the graph to locate the video nodes. */
191 media_entity_graph_walk_start(&graph, entity);
193 while ((entity = media_entity_graph_walk_next(&graph))) {
194 struct xvip_dma *dma;
196 if (entity->type != MEDIA_ENT_T_DEVNODE_V4L)
199 dma = to_xvip_dma(media_entity_to_video_device(entity));
201 if (dma->pad.flags & MEDIA_PAD_FL_SINK) {
209 mutex_unlock(&mdev->graph_mutex);
211 /* We need exactly one output and zero or one input. */
212 if (num_outputs != 1 || num_inputs > 1)
215 pipe->num_dmas = num_inputs + num_outputs;
220 static void __xvip_pipeline_cleanup(struct xvip_pipeline *pipe)
227 * xvip_pipeline_cleanup - Cleanup the pipeline after streaming
228 * @pipe: the pipeline
230 * Decrease the pipeline use count and clean it up if we were the last user.
232 static void xvip_pipeline_cleanup(struct xvip_pipeline *pipe)
234 mutex_lock(&pipe->lock);
236 /* If we're the last user clean up the pipeline. */
237 if (--pipe->use_count == 0)
238 __xvip_pipeline_cleanup(pipe);
240 mutex_unlock(&pipe->lock);
244 * xvip_pipeline_prepare - Prepare the pipeline for streaming
245 * @pipe: the pipeline
246 * @dma: DMA engine at one end of the pipeline
248 * Validate the pipeline if no user exists yet, otherwise just increase the use
251 * Return: 0 if successful or -EPIPE if the pipeline is not valid.
253 static int xvip_pipeline_prepare(struct xvip_pipeline *pipe,
254 struct xvip_dma *dma)
258 mutex_lock(&pipe->lock);
260 /* If we're the first user validate and initialize the pipeline. */
261 if (pipe->use_count == 0) {
262 ret = xvip_pipeline_validate(pipe, dma);
264 __xvip_pipeline_cleanup(pipe);
273 mutex_unlock(&pipe->lock);
277 /* -----------------------------------------------------------------------------
278 * videobuf2 queue operations
282 * struct xvip_dma_buffer - Video DMA buffer
283 * @buf: vb2 buffer base object
284 * @queue: buffer list entry in the DMA engine queued buffers list
285 * @dma: DMA channel that uses the buffer
287 struct xvip_dma_buffer {
288 struct vb2_v4l2_buffer buf;
289 struct list_head queue;
290 struct xvip_dma *dma;
293 #define to_xvip_dma_buffer(vb) container_of(vb, struct xvip_dma_buffer, buf)
295 static void xvip_dma_complete(void *param)
297 struct xvip_dma_buffer *buf = param;
298 struct xvip_dma *dma = buf->dma;
300 spin_lock(&dma->queued_lock);
301 list_del(&buf->queue);
302 spin_unlock(&dma->queued_lock);
304 buf->buf.field = V4L2_FIELD_NONE;
305 buf->buf.sequence = dma->sequence++;
306 v4l2_get_timestamp(&buf->buf.timestamp);
307 vb2_set_plane_payload(&buf->buf.vb2_buf, 0, dma->format.sizeimage);
308 vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_DONE);
312 xvip_dma_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
313 unsigned int *nbuffers, unsigned int *nplanes,
314 unsigned int sizes[], void *alloc_ctxs[])
316 struct xvip_dma *dma = vb2_get_drv_priv(vq);
318 /* Make sure the image size is large enough. */
319 if (fmt && fmt->fmt.pix.sizeimage < dma->format.sizeimage)
324 sizes[0] = fmt ? fmt->fmt.pix.sizeimage : dma->format.sizeimage;
325 alloc_ctxs[0] = dma->alloc_ctx;
330 static int xvip_dma_buffer_prepare(struct vb2_buffer *vb)
332 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
333 struct xvip_dma *dma = vb2_get_drv_priv(vb->vb2_queue);
334 struct xvip_dma_buffer *buf = to_xvip_dma_buffer(vbuf);
341 static void xvip_dma_buffer_queue(struct vb2_buffer *vb)
343 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
344 struct xvip_dma *dma = vb2_get_drv_priv(vb->vb2_queue);
345 struct xvip_dma_buffer *buf = to_xvip_dma_buffer(vbuf);
346 struct dma_async_tx_descriptor *desc;
347 dma_addr_t addr = vb2_dma_contig_plane_dma_addr(vb, 0);
350 if (dma->queue.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
351 flags = DMA_PREP_INTERRUPT | DMA_CTRL_ACK;
352 dma->xt.dir = DMA_DEV_TO_MEM;
353 dma->xt.src_sgl = false;
354 dma->xt.dst_sgl = true;
355 dma->xt.dst_start = addr;
357 flags = DMA_PREP_INTERRUPT | DMA_CTRL_ACK;
358 dma->xt.dir = DMA_MEM_TO_DEV;
359 dma->xt.src_sgl = true;
360 dma->xt.dst_sgl = false;
361 dma->xt.src_start = addr;
364 dma->xt.frame_size = 1;
365 dma->sgl[0].size = dma->format.width * dma->fmtinfo->bpp;
366 dma->sgl[0].icg = dma->format.bytesperline - dma->sgl[0].size;
367 dma->xt.numf = dma->format.height;
369 desc = dmaengine_prep_interleaved_dma(dma->dma, &dma->xt, flags);
371 dev_err(dma->xdev->dev, "Failed to prepare DMA transfer\n");
372 vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_ERROR);
375 desc->callback = xvip_dma_complete;
376 desc->callback_param = buf;
378 spin_lock_irq(&dma->queued_lock);
379 list_add_tail(&buf->queue, &dma->queued_bufs);
380 spin_unlock_irq(&dma->queued_lock);
382 dmaengine_submit(desc);
384 if (vb2_is_streaming(&dma->queue))
385 dma_async_issue_pending(dma->dma);
388 static int xvip_dma_start_streaming(struct vb2_queue *vq, unsigned int count)
390 struct xvip_dma *dma = vb2_get_drv_priv(vq);
391 struct xvip_dma_buffer *buf, *nbuf;
392 struct xvip_pipeline *pipe;
398 * Start streaming on the pipeline. No link touching an entity in the
399 * pipeline can be activated or deactivated once streaming is started.
401 * Use the pipeline object embedded in the first DMA object that starts
404 pipe = dma->video.entity.pipe
405 ? to_xvip_pipeline(&dma->video.entity) : &dma->pipe;
407 ret = media_entity_pipeline_start(&dma->video.entity, &pipe->pipe);
411 /* Verify that the configured format matches the output of the
414 ret = xvip_dma_verify_format(dma);
418 ret = xvip_pipeline_prepare(pipe, dma);
422 /* Start the DMA engine. This must be done before starting the blocks
423 * in the pipeline to avoid DMA synchronization issues.
425 dma_async_issue_pending(dma->dma);
427 /* Start the pipeline. */
428 xvip_pipeline_set_stream(pipe, true);
433 media_entity_pipeline_stop(&dma->video.entity);
436 /* Give back all queued buffers to videobuf2. */
437 spin_lock_irq(&dma->queued_lock);
438 list_for_each_entry_safe(buf, nbuf, &dma->queued_bufs, queue) {
439 vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_QUEUED);
440 list_del(&buf->queue);
442 spin_unlock_irq(&dma->queued_lock);
447 static void xvip_dma_stop_streaming(struct vb2_queue *vq)
449 struct xvip_dma *dma = vb2_get_drv_priv(vq);
450 struct xvip_pipeline *pipe = to_xvip_pipeline(&dma->video.entity);
451 struct xvip_dma_buffer *buf, *nbuf;
453 /* Stop the pipeline. */
454 xvip_pipeline_set_stream(pipe, false);
456 /* Stop and reset the DMA engine. */
457 dmaengine_terminate_all(dma->dma);
459 /* Cleanup the pipeline and mark it as being stopped. */
460 xvip_pipeline_cleanup(pipe);
461 media_entity_pipeline_stop(&dma->video.entity);
463 /* Give back all queued buffers to videobuf2. */
464 spin_lock_irq(&dma->queued_lock);
465 list_for_each_entry_safe(buf, nbuf, &dma->queued_bufs, queue) {
466 vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_ERROR);
467 list_del(&buf->queue);
469 spin_unlock_irq(&dma->queued_lock);
472 static struct vb2_ops xvip_dma_queue_qops = {
473 .queue_setup = xvip_dma_queue_setup,
474 .buf_prepare = xvip_dma_buffer_prepare,
475 .buf_queue = xvip_dma_buffer_queue,
476 .wait_prepare = vb2_ops_wait_prepare,
477 .wait_finish = vb2_ops_wait_finish,
478 .start_streaming = xvip_dma_start_streaming,
479 .stop_streaming = xvip_dma_stop_streaming,
482 /* -----------------------------------------------------------------------------
487 xvip_dma_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
489 struct v4l2_fh *vfh = file->private_data;
490 struct xvip_dma *dma = to_xvip_dma(vfh->vdev);
492 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
493 | dma->xdev->v4l2_caps;
495 if (dma->queue.type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
496 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
498 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
500 strlcpy(cap->driver, "xilinx-vipp", sizeof(cap->driver));
501 strlcpy(cap->card, dma->video.name, sizeof(cap->card));
502 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s:%u",
503 dma->xdev->dev->of_node->name, dma->port);
508 /* FIXME: without this callback function, some applications are not configured
509 * with correct formats, and it results in frames in wrong format. Whether this
510 * callback needs to be required is not clearly defined, so it should be
511 * clarified through the mailing list.
514 xvip_dma_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f)
516 struct v4l2_fh *vfh = file->private_data;
517 struct xvip_dma *dma = to_xvip_dma(vfh->vdev);
522 f->pixelformat = dma->format.pixelformat;
523 strlcpy(f->description, dma->fmtinfo->description,
524 sizeof(f->description));
530 xvip_dma_get_format(struct file *file, void *fh, struct v4l2_format *format)
532 struct v4l2_fh *vfh = file->private_data;
533 struct xvip_dma *dma = to_xvip_dma(vfh->vdev);
535 format->fmt.pix = dma->format;
541 __xvip_dma_try_format(struct xvip_dma *dma, struct v4l2_pix_format *pix,
542 const struct xvip_video_format **fmtinfo)
544 const struct xvip_video_format *info;
545 unsigned int min_width;
546 unsigned int max_width;
547 unsigned int min_bpl;
548 unsigned int max_bpl;
553 /* Retrieve format information and select the default format if the
554 * requested format isn't supported.
556 info = xvip_get_format_by_fourcc(pix->pixelformat);
558 info = xvip_get_format_by_fourcc(XVIP_DMA_DEF_FORMAT);
560 pix->pixelformat = info->fourcc;
561 pix->field = V4L2_FIELD_NONE;
563 /* The transfer alignment requirements are expressed in bytes. Compute
564 * the minimum and maximum values, clamp the requested width and convert
567 align = lcm(dma->align, info->bpp);
568 min_width = roundup(XVIP_DMA_MIN_WIDTH, align);
569 max_width = rounddown(XVIP_DMA_MAX_WIDTH, align);
570 width = rounddown(pix->width * info->bpp, align);
572 pix->width = clamp(width, min_width, max_width) / info->bpp;
573 pix->height = clamp(pix->height, XVIP_DMA_MIN_HEIGHT,
574 XVIP_DMA_MAX_HEIGHT);
576 /* Clamp the requested bytes per line value. If the maximum bytes per
577 * line value is zero, the module doesn't support user configurable line
578 * sizes. Override the requested value with the minimum in that case.
580 min_bpl = pix->width * info->bpp;
581 max_bpl = rounddown(XVIP_DMA_MAX_WIDTH, dma->align);
582 bpl = rounddown(pix->bytesperline, dma->align);
584 pix->bytesperline = clamp(bpl, min_bpl, max_bpl);
585 pix->sizeimage = pix->bytesperline * pix->height;
592 xvip_dma_try_format(struct file *file, void *fh, struct v4l2_format *format)
594 struct v4l2_fh *vfh = file->private_data;
595 struct xvip_dma *dma = to_xvip_dma(vfh->vdev);
597 __xvip_dma_try_format(dma, &format->fmt.pix, NULL);
602 xvip_dma_set_format(struct file *file, void *fh, struct v4l2_format *format)
604 struct v4l2_fh *vfh = file->private_data;
605 struct xvip_dma *dma = to_xvip_dma(vfh->vdev);
606 const struct xvip_video_format *info;
608 __xvip_dma_try_format(dma, &format->fmt.pix, &info);
610 if (vb2_is_busy(&dma->queue))
613 dma->format = format->fmt.pix;
619 static const struct v4l2_ioctl_ops xvip_dma_ioctl_ops = {
620 .vidioc_querycap = xvip_dma_querycap,
621 .vidioc_enum_fmt_vid_cap = xvip_dma_enum_format,
622 .vidioc_g_fmt_vid_cap = xvip_dma_get_format,
623 .vidioc_g_fmt_vid_out = xvip_dma_get_format,
624 .vidioc_s_fmt_vid_cap = xvip_dma_set_format,
625 .vidioc_s_fmt_vid_out = xvip_dma_set_format,
626 .vidioc_try_fmt_vid_cap = xvip_dma_try_format,
627 .vidioc_try_fmt_vid_out = xvip_dma_try_format,
628 .vidioc_reqbufs = vb2_ioctl_reqbufs,
629 .vidioc_querybuf = vb2_ioctl_querybuf,
630 .vidioc_qbuf = vb2_ioctl_qbuf,
631 .vidioc_dqbuf = vb2_ioctl_dqbuf,
632 .vidioc_create_bufs = vb2_ioctl_create_bufs,
633 .vidioc_expbuf = vb2_ioctl_expbuf,
634 .vidioc_streamon = vb2_ioctl_streamon,
635 .vidioc_streamoff = vb2_ioctl_streamoff,
638 /* -----------------------------------------------------------------------------
639 * V4L2 file operations
642 static const struct v4l2_file_operations xvip_dma_fops = {
643 .owner = THIS_MODULE,
644 .unlocked_ioctl = video_ioctl2,
645 .open = v4l2_fh_open,
646 .release = vb2_fop_release,
647 .poll = vb2_fop_poll,
648 .mmap = vb2_fop_mmap,
651 /* -----------------------------------------------------------------------------
652 * Xilinx Video DMA Core
655 int xvip_dma_init(struct xvip_composite_device *xdev, struct xvip_dma *dma,
656 enum v4l2_buf_type type, unsigned int port)
663 mutex_init(&dma->lock);
664 mutex_init(&dma->pipe.lock);
665 INIT_LIST_HEAD(&dma->queued_bufs);
666 spin_lock_init(&dma->queued_lock);
668 dma->fmtinfo = xvip_get_format_by_fourcc(XVIP_DMA_DEF_FORMAT);
669 dma->format.pixelformat = dma->fmtinfo->fourcc;
670 dma->format.colorspace = V4L2_COLORSPACE_SRGB;
671 dma->format.field = V4L2_FIELD_NONE;
672 dma->format.width = XVIP_DMA_DEF_WIDTH;
673 dma->format.height = XVIP_DMA_DEF_HEIGHT;
674 dma->format.bytesperline = dma->format.width * dma->fmtinfo->bpp;
675 dma->format.sizeimage = dma->format.bytesperline * dma->format.height;
677 /* Initialize the media entity... */
678 dma->pad.flags = type == V4L2_BUF_TYPE_VIDEO_CAPTURE
679 ? MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
681 ret = media_entity_init(&dma->video.entity, 1, &dma->pad, 0);
685 /* ... and the video node... */
686 dma->video.fops = &xvip_dma_fops;
687 dma->video.v4l2_dev = &xdev->v4l2_dev;
688 dma->video.queue = &dma->queue;
689 snprintf(dma->video.name, sizeof(dma->video.name), "%s %s %u",
690 xdev->dev->of_node->name,
691 type == V4L2_BUF_TYPE_VIDEO_CAPTURE ? "output" : "input",
693 dma->video.vfl_type = VFL_TYPE_GRABBER;
694 dma->video.vfl_dir = type == V4L2_BUF_TYPE_VIDEO_CAPTURE
695 ? VFL_DIR_RX : VFL_DIR_TX;
696 dma->video.release = video_device_release_empty;
697 dma->video.ioctl_ops = &xvip_dma_ioctl_ops;
698 dma->video.lock = &dma->lock;
700 video_set_drvdata(&dma->video, dma);
702 /* ... and the buffers queue... */
703 dma->alloc_ctx = vb2_dma_contig_init_ctx(dma->xdev->dev);
704 if (IS_ERR(dma->alloc_ctx)) {
705 ret = PTR_ERR(dma->alloc_ctx);
709 /* Don't enable VB2_READ and VB2_WRITE, as using the read() and write()
710 * V4L2 APIs would be inefficient. Testing on the command line with a
711 * 'cat /dev/video?' thus won't be possible, but given that the driver
712 * anyway requires a test tool to setup the pipeline before any video
713 * stream can be started, requiring a specific V4L2 test tool as well
714 * instead of 'cat' isn't really a drawback.
716 dma->queue.type = type;
717 dma->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
718 dma->queue.lock = &dma->lock;
719 dma->queue.drv_priv = dma;
720 dma->queue.buf_struct_size = sizeof(struct xvip_dma_buffer);
721 dma->queue.ops = &xvip_dma_queue_qops;
722 dma->queue.mem_ops = &vb2_dma_contig_memops;
723 dma->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
724 | V4L2_BUF_FLAG_TSTAMP_SRC_EOF;
725 ret = vb2_queue_init(&dma->queue);
727 dev_err(dma->xdev->dev, "failed to initialize VB2 queue\n");
731 /* ... and the DMA channel. */
732 snprintf(name, sizeof(name), "port%u", port);
733 dma->dma = dma_request_slave_channel(dma->xdev->dev, name);
734 if (dma->dma == NULL) {
735 dev_err(dma->xdev->dev, "no VDMA channel found\n");
740 dma->align = 1 << dma->dma->device->copy_align;
742 ret = video_register_device(&dma->video, VFL_TYPE_GRABBER, -1);
744 dev_err(dma->xdev->dev, "failed to register video device\n");
751 xvip_dma_cleanup(dma);
755 void xvip_dma_cleanup(struct xvip_dma *dma)
757 if (video_is_registered(&dma->video))
758 video_unregister_device(&dma->video);
761 dma_release_channel(dma->dma);
763 if (!IS_ERR_OR_NULL(dma->alloc_ctx))
764 vb2_dma_contig_cleanup_ctx(dma->alloc_ctx);
766 media_entity_cleanup(&dma->video.entity);
768 mutex_destroy(&dma->lock);
769 mutex_destroy(&dma->pipe.lock);