// SPDX-License-Identifier: GPL-2.0
|
/*
|
* Xilinx Video DMA
|
*
|
* Copyright (C) 2013-2015 Ideas on Board
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* Copyright (C) 2013-2015 Xilinx, Inc.
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*
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* Contacts: Hyun Kwon <hyun.kwon@xilinx.com>
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* Laurent Pinchart <laurent.pinchart@ideasonboard.com>
|
*/
|
|
#include <linux/dma/xilinx_dma.h>
|
#include <linux/lcm.h>
|
#include <linux/list.h>
|
#include <linux/module.h>
|
#include <linux/of.h>
|
#include <linux/slab.h>
|
|
#include <media/v4l2-dev.h>
|
#include <media/v4l2-fh.h>
|
#include <media/v4l2-ioctl.h>
|
#include <media/videobuf2-v4l2.h>
|
#include <media/videobuf2-dma-contig.h>
|
|
#include "xilinx-dma.h"
|
#include "xilinx-vip.h"
|
#include "xilinx-vipp.h"
|
|
#define XVIP_DMA_DEF_FORMAT V4L2_PIX_FMT_YUYV
|
#define XVIP_DMA_DEF_WIDTH 1920
|
#define XVIP_DMA_DEF_HEIGHT 1080
|
|
/* Minimum and maximum widths are expressed in bytes */
|
#define XVIP_DMA_MIN_WIDTH 1U
|
#define XVIP_DMA_MAX_WIDTH 65535U
|
#define XVIP_DMA_MIN_HEIGHT 1U
|
#define XVIP_DMA_MAX_HEIGHT 8191U
|
|
/* -----------------------------------------------------------------------------
|
* Helper functions
|
*/
|
|
static struct v4l2_subdev *
|
xvip_dma_remote_subdev(struct media_pad *local, u32 *pad)
|
{
|
struct media_pad *remote;
|
|
remote = media_entity_remote_pad(local);
|
if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
|
return NULL;
|
|
if (pad)
|
*pad = remote->index;
|
|
return media_entity_to_v4l2_subdev(remote->entity);
|
}
|
|
static int xvip_dma_verify_format(struct xvip_dma *dma)
|
{
|
struct v4l2_subdev_format fmt;
|
struct v4l2_subdev *subdev;
|
int ret;
|
|
subdev = xvip_dma_remote_subdev(&dma->pad, &fmt.pad);
|
if (subdev == NULL)
|
return -EPIPE;
|
|
fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
|
ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
|
if (ret < 0)
|
return ret == -ENOIOCTLCMD ? -EINVAL : ret;
|
|
if (dma->fmtinfo->code != fmt.format.code ||
|
dma->format.height != fmt.format.height ||
|
dma->format.width != fmt.format.width ||
|
dma->format.colorspace != fmt.format.colorspace)
|
return -EINVAL;
|
|
return 0;
|
}
|
|
/* -----------------------------------------------------------------------------
|
* Pipeline Stream Management
|
*/
|
|
/**
|
* xvip_pipeline_start_stop - Start ot stop streaming on a pipeline
|
* @pipe: The pipeline
|
* @start: Start (when true) or stop (when false) the pipeline
|
*
|
* Walk the entities chain starting at the pipeline output video node and start
|
* or stop all of them.
|
*
|
* Return: 0 if successful, or the return value of the failed video::s_stream
|
* operation otherwise.
|
*/
|
static int xvip_pipeline_start_stop(struct xvip_pipeline *pipe, bool start)
|
{
|
struct xvip_dma *dma = pipe->output;
|
struct media_entity *entity;
|
struct media_pad *pad;
|
struct v4l2_subdev *subdev;
|
int ret;
|
|
entity = &dma->video.entity;
|
while (1) {
|
pad = &entity->pads[0];
|
if (!(pad->flags & MEDIA_PAD_FL_SINK))
|
break;
|
|
pad = media_entity_remote_pad(pad);
|
if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
|
break;
|
|
entity = pad->entity;
|
subdev = media_entity_to_v4l2_subdev(entity);
|
|
ret = v4l2_subdev_call(subdev, video, s_stream, start);
|
if (start && ret < 0 && ret != -ENOIOCTLCMD)
|
return ret;
|
}
|
|
return 0;
|
}
|
|
/**
|
* xvip_pipeline_set_stream - Enable/disable streaming on a pipeline
|
* @pipe: The pipeline
|
* @on: Turn the stream on when true or off when false
|
*
|
* The pipeline is shared between all DMA engines connect at its input and
|
* output. While the stream state of DMA engines can be controlled
|
* independently, pipelines have a shared stream state that enable or disable
|
* all entities in the pipeline. For this reason the pipeline uses a streaming
|
* counter that tracks the number of DMA engines that have requested the stream
|
* to be enabled.
|
*
|
* When called with the @on argument set to true, this function will increment
|
* the pipeline streaming count. If the streaming count reaches the number of
|
* DMA engines in the pipeline it will enable all entities that belong to the
|
* pipeline.
|
*
|
* Similarly, when called with the @on argument set to false, this function will
|
* decrement the pipeline streaming count and disable all entities in the
|
* pipeline when the streaming count reaches zero.
|
*
|
* Return: 0 if successful, or the return value of the failed video::s_stream
|
* operation otherwise. Stopping the pipeline never fails. The pipeline state is
|
* not updated when the operation fails.
|
*/
|
static int xvip_pipeline_set_stream(struct xvip_pipeline *pipe, bool on)
|
{
|
int ret = 0;
|
|
mutex_lock(&pipe->lock);
|
|
if (on) {
|
if (pipe->stream_count == pipe->num_dmas - 1) {
|
ret = xvip_pipeline_start_stop(pipe, true);
|
if (ret < 0)
|
goto done;
|
}
|
pipe->stream_count++;
|
} else {
|
if (--pipe->stream_count == 0)
|
xvip_pipeline_start_stop(pipe, false);
|
}
|
|
done:
|
mutex_unlock(&pipe->lock);
|
return ret;
|
}
|
|
static int xvip_pipeline_validate(struct xvip_pipeline *pipe,
|
struct xvip_dma *start)
|
{
|
struct media_graph graph;
|
struct media_entity *entity = &start->video.entity;
|
struct media_device *mdev = entity->graph_obj.mdev;
|
unsigned int num_inputs = 0;
|
unsigned int num_outputs = 0;
|
int ret;
|
|
mutex_lock(&mdev->graph_mutex);
|
|
/* Walk the graph to locate the video nodes. */
|
ret = media_graph_walk_init(&graph, mdev);
|
if (ret) {
|
mutex_unlock(&mdev->graph_mutex);
|
return ret;
|
}
|
|
media_graph_walk_start(&graph, entity);
|
|
while ((entity = media_graph_walk_next(&graph))) {
|
struct xvip_dma *dma;
|
|
if (entity->function != MEDIA_ENT_F_IO_V4L)
|
continue;
|
|
dma = to_xvip_dma(media_entity_to_video_device(entity));
|
|
if (dma->pad.flags & MEDIA_PAD_FL_SINK) {
|
pipe->output = dma;
|
num_outputs++;
|
} else {
|
num_inputs++;
|
}
|
}
|
|
mutex_unlock(&mdev->graph_mutex);
|
|
media_graph_walk_cleanup(&graph);
|
|
/* We need exactly one output and zero or one input. */
|
if (num_outputs != 1 || num_inputs > 1)
|
return -EPIPE;
|
|
pipe->num_dmas = num_inputs + num_outputs;
|
|
return 0;
|
}
|
|
static void __xvip_pipeline_cleanup(struct xvip_pipeline *pipe)
|
{
|
pipe->num_dmas = 0;
|
pipe->output = NULL;
|
}
|
|
/**
|
* xvip_pipeline_cleanup - Cleanup the pipeline after streaming
|
* @pipe: the pipeline
|
*
|
* Decrease the pipeline use count and clean it up if we were the last user.
|
*/
|
static void xvip_pipeline_cleanup(struct xvip_pipeline *pipe)
|
{
|
mutex_lock(&pipe->lock);
|
|
/* If we're the last user clean up the pipeline. */
|
if (--pipe->use_count == 0)
|
__xvip_pipeline_cleanup(pipe);
|
|
mutex_unlock(&pipe->lock);
|
}
|
|
/**
|
* xvip_pipeline_prepare - Prepare the pipeline for streaming
|
* @pipe: the pipeline
|
* @dma: DMA engine at one end of the pipeline
|
*
|
* Validate the pipeline if no user exists yet, otherwise just increase the use
|
* count.
|
*
|
* Return: 0 if successful or -EPIPE if the pipeline is not valid.
|
*/
|
static int xvip_pipeline_prepare(struct xvip_pipeline *pipe,
|
struct xvip_dma *dma)
|
{
|
int ret;
|
|
mutex_lock(&pipe->lock);
|
|
/* If we're the first user validate and initialize the pipeline. */
|
if (pipe->use_count == 0) {
|
ret = xvip_pipeline_validate(pipe, dma);
|
if (ret < 0) {
|
__xvip_pipeline_cleanup(pipe);
|
goto done;
|
}
|
}
|
|
pipe->use_count++;
|
ret = 0;
|
|
done:
|
mutex_unlock(&pipe->lock);
|
return ret;
|
}
|
|
/* -----------------------------------------------------------------------------
|
* videobuf2 queue operations
|
*/
|
|
/**
|
* struct xvip_dma_buffer - Video DMA buffer
|
* @buf: vb2 buffer base object
|
* @queue: buffer list entry in the DMA engine queued buffers list
|
* @dma: DMA channel that uses the buffer
|
*/
|
struct xvip_dma_buffer {
|
struct vb2_v4l2_buffer buf;
|
struct list_head queue;
|
struct xvip_dma *dma;
|
};
|
|
#define to_xvip_dma_buffer(vb) container_of(vb, struct xvip_dma_buffer, buf)
|
|
static void xvip_dma_complete(void *param)
|
{
|
struct xvip_dma_buffer *buf = param;
|
struct xvip_dma *dma = buf->dma;
|
|
spin_lock(&dma->queued_lock);
|
list_del(&buf->queue);
|
spin_unlock(&dma->queued_lock);
|
|
buf->buf.field = V4L2_FIELD_NONE;
|
buf->buf.sequence = dma->sequence++;
|
buf->buf.vb2_buf.timestamp = ktime_get_ns();
|
vb2_set_plane_payload(&buf->buf.vb2_buf, 0, dma->format.sizeimage);
|
vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_DONE);
|
}
|
|
static int
|
xvip_dma_queue_setup(struct vb2_queue *vq,
|
unsigned int *nbuffers, unsigned int *nplanes,
|
unsigned int sizes[], struct device *alloc_devs[])
|
{
|
struct xvip_dma *dma = vb2_get_drv_priv(vq);
|
|
/* Make sure the image size is large enough. */
|
if (*nplanes)
|
return sizes[0] < dma->format.sizeimage ? -EINVAL : 0;
|
|
*nplanes = 1;
|
sizes[0] = dma->format.sizeimage;
|
|
return 0;
|
}
|
|
static int xvip_dma_buffer_prepare(struct vb2_buffer *vb)
|
{
|
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
|
struct xvip_dma *dma = vb2_get_drv_priv(vb->vb2_queue);
|
struct xvip_dma_buffer *buf = to_xvip_dma_buffer(vbuf);
|
|
buf->dma = dma;
|
|
return 0;
|
}
|
|
static void xvip_dma_buffer_queue(struct vb2_buffer *vb)
|
{
|
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
|
struct xvip_dma *dma = vb2_get_drv_priv(vb->vb2_queue);
|
struct xvip_dma_buffer *buf = to_xvip_dma_buffer(vbuf);
|
struct dma_async_tx_descriptor *desc;
|
dma_addr_t addr = vb2_dma_contig_plane_dma_addr(vb, 0);
|
u32 flags;
|
|
if (dma->queue.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
|
flags = DMA_PREP_INTERRUPT | DMA_CTRL_ACK;
|
dma->xt.dir = DMA_DEV_TO_MEM;
|
dma->xt.src_sgl = false;
|
dma->xt.dst_sgl = true;
|
dma->xt.dst_start = addr;
|
} else {
|
flags = DMA_PREP_INTERRUPT | DMA_CTRL_ACK;
|
dma->xt.dir = DMA_MEM_TO_DEV;
|
dma->xt.src_sgl = true;
|
dma->xt.dst_sgl = false;
|
dma->xt.src_start = addr;
|
}
|
|
dma->xt.frame_size = 1;
|
dma->sgl[0].size = dma->format.width * dma->fmtinfo->bpp;
|
dma->sgl[0].icg = dma->format.bytesperline - dma->sgl[0].size;
|
dma->xt.numf = dma->format.height;
|
|
desc = dmaengine_prep_interleaved_dma(dma->dma, &dma->xt, flags);
|
if (!desc) {
|
dev_err(dma->xdev->dev, "Failed to prepare DMA transfer\n");
|
vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_ERROR);
|
return;
|
}
|
desc->callback = xvip_dma_complete;
|
desc->callback_param = buf;
|
|
spin_lock_irq(&dma->queued_lock);
|
list_add_tail(&buf->queue, &dma->queued_bufs);
|
spin_unlock_irq(&dma->queued_lock);
|
|
dmaengine_submit(desc);
|
|
if (vb2_is_streaming(&dma->queue))
|
dma_async_issue_pending(dma->dma);
|
}
|
|
static int xvip_dma_start_streaming(struct vb2_queue *vq, unsigned int count)
|
{
|
struct xvip_dma *dma = vb2_get_drv_priv(vq);
|
struct xvip_dma_buffer *buf, *nbuf;
|
struct xvip_pipeline *pipe;
|
int ret;
|
|
dma->sequence = 0;
|
|
/*
|
* Start streaming on the pipeline. No link touching an entity in the
|
* pipeline can be activated or deactivated once streaming is started.
|
*
|
* Use the pipeline object embedded in the first DMA object that starts
|
* streaming.
|
*/
|
pipe = dma->video.entity.pipe
|
? to_xvip_pipeline(&dma->video.entity) : &dma->pipe;
|
|
ret = media_pipeline_start(&dma->video.entity, &pipe->pipe);
|
if (ret < 0)
|
goto error;
|
|
/* Verify that the configured format matches the output of the
|
* connected subdev.
|
*/
|
ret = xvip_dma_verify_format(dma);
|
if (ret < 0)
|
goto error_stop;
|
|
ret = xvip_pipeline_prepare(pipe, dma);
|
if (ret < 0)
|
goto error_stop;
|
|
/* Start the DMA engine. This must be done before starting the blocks
|
* in the pipeline to avoid DMA synchronization issues.
|
*/
|
dma_async_issue_pending(dma->dma);
|
|
/* Start the pipeline. */
|
xvip_pipeline_set_stream(pipe, true);
|
|
return 0;
|
|
error_stop:
|
media_pipeline_stop(&dma->video.entity);
|
|
error:
|
/* Give back all queued buffers to videobuf2. */
|
spin_lock_irq(&dma->queued_lock);
|
list_for_each_entry_safe(buf, nbuf, &dma->queued_bufs, queue) {
|
vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_QUEUED);
|
list_del(&buf->queue);
|
}
|
spin_unlock_irq(&dma->queued_lock);
|
|
return ret;
|
}
|
|
static void xvip_dma_stop_streaming(struct vb2_queue *vq)
|
{
|
struct xvip_dma *dma = vb2_get_drv_priv(vq);
|
struct xvip_pipeline *pipe = to_xvip_pipeline(&dma->video.entity);
|
struct xvip_dma_buffer *buf, *nbuf;
|
|
/* Stop the pipeline. */
|
xvip_pipeline_set_stream(pipe, false);
|
|
/* Stop and reset the DMA engine. */
|
dmaengine_terminate_all(dma->dma);
|
|
/* Cleanup the pipeline and mark it as being stopped. */
|
xvip_pipeline_cleanup(pipe);
|
media_pipeline_stop(&dma->video.entity);
|
|
/* Give back all queued buffers to videobuf2. */
|
spin_lock_irq(&dma->queued_lock);
|
list_for_each_entry_safe(buf, nbuf, &dma->queued_bufs, queue) {
|
vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_ERROR);
|
list_del(&buf->queue);
|
}
|
spin_unlock_irq(&dma->queued_lock);
|
}
|
|
static const struct vb2_ops xvip_dma_queue_qops = {
|
.queue_setup = xvip_dma_queue_setup,
|
.buf_prepare = xvip_dma_buffer_prepare,
|
.buf_queue = xvip_dma_buffer_queue,
|
.wait_prepare = vb2_ops_wait_prepare,
|
.wait_finish = vb2_ops_wait_finish,
|
.start_streaming = xvip_dma_start_streaming,
|
.stop_streaming = xvip_dma_stop_streaming,
|
};
|
|
/* -----------------------------------------------------------------------------
|
* V4L2 ioctls
|
*/
|
|
static int
|
xvip_dma_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
|
{
|
struct v4l2_fh *vfh = file->private_data;
|
struct xvip_dma *dma = to_xvip_dma(vfh->vdev);
|
|
cap->capabilities = dma->xdev->v4l2_caps | V4L2_CAP_STREAMING |
|
V4L2_CAP_DEVICE_CAPS;
|
|
strscpy(cap->driver, "xilinx-vipp", sizeof(cap->driver));
|
strscpy(cap->card, dma->video.name, sizeof(cap->card));
|
snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%pOFn:%u",
|
dma->xdev->dev->of_node, dma->port);
|
|
return 0;
|
}
|
|
/* FIXME: without this callback function, some applications are not configured
|
* with correct formats, and it results in frames in wrong format. Whether this
|
* callback needs to be required is not clearly defined, so it should be
|
* clarified through the mailing list.
|
*/
|
static int
|
xvip_dma_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f)
|
{
|
struct v4l2_fh *vfh = file->private_data;
|
struct xvip_dma *dma = to_xvip_dma(vfh->vdev);
|
|
if (f->index > 0)
|
return -EINVAL;
|
|
f->pixelformat = dma->format.pixelformat;
|
|
return 0;
|
}
|
|
static int
|
xvip_dma_get_format(struct file *file, void *fh, struct v4l2_format *format)
|
{
|
struct v4l2_fh *vfh = file->private_data;
|
struct xvip_dma *dma = to_xvip_dma(vfh->vdev);
|
|
format->fmt.pix = dma->format;
|
|
return 0;
|
}
|
|
static void
|
__xvip_dma_try_format(struct xvip_dma *dma, struct v4l2_pix_format *pix,
|
const struct xvip_video_format **fmtinfo)
|
{
|
const struct xvip_video_format *info;
|
unsigned int min_width;
|
unsigned int max_width;
|
unsigned int min_bpl;
|
unsigned int max_bpl;
|
unsigned int width;
|
unsigned int align;
|
unsigned int bpl;
|
|
/* Retrieve format information and select the default format if the
|
* requested format isn't supported.
|
*/
|
info = xvip_get_format_by_fourcc(pix->pixelformat);
|
if (IS_ERR(info))
|
info = xvip_get_format_by_fourcc(XVIP_DMA_DEF_FORMAT);
|
|
pix->pixelformat = info->fourcc;
|
pix->field = V4L2_FIELD_NONE;
|
|
/* The transfer alignment requirements are expressed in bytes. Compute
|
* the minimum and maximum values, clamp the requested width and convert
|
* it back to pixels.
|
*/
|
align = lcm(dma->align, info->bpp);
|
min_width = roundup(XVIP_DMA_MIN_WIDTH, align);
|
max_width = rounddown(XVIP_DMA_MAX_WIDTH, align);
|
width = rounddown(pix->width * info->bpp, align);
|
|
pix->width = clamp(width, min_width, max_width) / info->bpp;
|
pix->height = clamp(pix->height, XVIP_DMA_MIN_HEIGHT,
|
XVIP_DMA_MAX_HEIGHT);
|
|
/* Clamp the requested bytes per line value. If the maximum bytes per
|
* line value is zero, the module doesn't support user configurable line
|
* sizes. Override the requested value with the minimum in that case.
|
*/
|
min_bpl = pix->width * info->bpp;
|
max_bpl = rounddown(XVIP_DMA_MAX_WIDTH, dma->align);
|
bpl = rounddown(pix->bytesperline, dma->align);
|
|
pix->bytesperline = clamp(bpl, min_bpl, max_bpl);
|
pix->sizeimage = pix->bytesperline * pix->height;
|
|
if (fmtinfo)
|
*fmtinfo = info;
|
}
|
|
static int
|
xvip_dma_try_format(struct file *file, void *fh, struct v4l2_format *format)
|
{
|
struct v4l2_fh *vfh = file->private_data;
|
struct xvip_dma *dma = to_xvip_dma(vfh->vdev);
|
|
__xvip_dma_try_format(dma, &format->fmt.pix, NULL);
|
return 0;
|
}
|
|
static int
|
xvip_dma_set_format(struct file *file, void *fh, struct v4l2_format *format)
|
{
|
struct v4l2_fh *vfh = file->private_data;
|
struct xvip_dma *dma = to_xvip_dma(vfh->vdev);
|
const struct xvip_video_format *info;
|
|
__xvip_dma_try_format(dma, &format->fmt.pix, &info);
|
|
if (vb2_is_busy(&dma->queue))
|
return -EBUSY;
|
|
dma->format = format->fmt.pix;
|
dma->fmtinfo = info;
|
|
return 0;
|
}
|
|
static const struct v4l2_ioctl_ops xvip_dma_ioctl_ops = {
|
.vidioc_querycap = xvip_dma_querycap,
|
.vidioc_enum_fmt_vid_cap = xvip_dma_enum_format,
|
.vidioc_g_fmt_vid_cap = xvip_dma_get_format,
|
.vidioc_g_fmt_vid_out = xvip_dma_get_format,
|
.vidioc_s_fmt_vid_cap = xvip_dma_set_format,
|
.vidioc_s_fmt_vid_out = xvip_dma_set_format,
|
.vidioc_try_fmt_vid_cap = xvip_dma_try_format,
|
.vidioc_try_fmt_vid_out = xvip_dma_try_format,
|
.vidioc_reqbufs = vb2_ioctl_reqbufs,
|
.vidioc_querybuf = vb2_ioctl_querybuf,
|
.vidioc_qbuf = vb2_ioctl_qbuf,
|
.vidioc_dqbuf = vb2_ioctl_dqbuf,
|
.vidioc_create_bufs = vb2_ioctl_create_bufs,
|
.vidioc_expbuf = vb2_ioctl_expbuf,
|
.vidioc_streamon = vb2_ioctl_streamon,
|
.vidioc_streamoff = vb2_ioctl_streamoff,
|
};
|
|
/* -----------------------------------------------------------------------------
|
* V4L2 file operations
|
*/
|
|
static const struct v4l2_file_operations xvip_dma_fops = {
|
.owner = THIS_MODULE,
|
.unlocked_ioctl = video_ioctl2,
|
.open = v4l2_fh_open,
|
.release = vb2_fop_release,
|
.poll = vb2_fop_poll,
|
.mmap = vb2_fop_mmap,
|
};
|
|
/* -----------------------------------------------------------------------------
|
* Xilinx Video DMA Core
|
*/
|
|
int xvip_dma_init(struct xvip_composite_device *xdev, struct xvip_dma *dma,
|
enum v4l2_buf_type type, unsigned int port)
|
{
|
char name[16];
|
int ret;
|
|
dma->xdev = xdev;
|
dma->port = port;
|
mutex_init(&dma->lock);
|
mutex_init(&dma->pipe.lock);
|
INIT_LIST_HEAD(&dma->queued_bufs);
|
spin_lock_init(&dma->queued_lock);
|
|
dma->fmtinfo = xvip_get_format_by_fourcc(XVIP_DMA_DEF_FORMAT);
|
dma->format.pixelformat = dma->fmtinfo->fourcc;
|
dma->format.colorspace = V4L2_COLORSPACE_SRGB;
|
dma->format.field = V4L2_FIELD_NONE;
|
dma->format.width = XVIP_DMA_DEF_WIDTH;
|
dma->format.height = XVIP_DMA_DEF_HEIGHT;
|
dma->format.bytesperline = dma->format.width * dma->fmtinfo->bpp;
|
dma->format.sizeimage = dma->format.bytesperline * dma->format.height;
|
|
/* Initialize the media entity... */
|
dma->pad.flags = type == V4L2_BUF_TYPE_VIDEO_CAPTURE
|
? MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
|
|
ret = media_entity_pads_init(&dma->video.entity, 1, &dma->pad);
|
if (ret < 0)
|
goto error;
|
|
/* ... and the video node... */
|
dma->video.fops = &xvip_dma_fops;
|
dma->video.v4l2_dev = &xdev->v4l2_dev;
|
dma->video.queue = &dma->queue;
|
snprintf(dma->video.name, sizeof(dma->video.name), "%pOFn %s %u",
|
xdev->dev->of_node,
|
type == V4L2_BUF_TYPE_VIDEO_CAPTURE ? "output" : "input",
|
port);
|
dma->video.vfl_type = VFL_TYPE_VIDEO;
|
dma->video.vfl_dir = type == V4L2_BUF_TYPE_VIDEO_CAPTURE
|
? VFL_DIR_RX : VFL_DIR_TX;
|
dma->video.release = video_device_release_empty;
|
dma->video.ioctl_ops = &xvip_dma_ioctl_ops;
|
dma->video.lock = &dma->lock;
|
dma->video.device_caps = V4L2_CAP_STREAMING;
|
if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
dma->video.device_caps |= V4L2_CAP_VIDEO_CAPTURE;
|
else
|
dma->video.device_caps |= V4L2_CAP_VIDEO_OUTPUT;
|
|
video_set_drvdata(&dma->video, dma);
|
|
/* ... and the buffers queue... */
|
/* Don't enable VB2_READ and VB2_WRITE, as using the read() and write()
|
* V4L2 APIs would be inefficient. Testing on the command line with a
|
* 'cat /dev/video?' thus won't be possible, but given that the driver
|
* anyway requires a test tool to setup the pipeline before any video
|
* stream can be started, requiring a specific V4L2 test tool as well
|
* instead of 'cat' isn't really a drawback.
|
*/
|
dma->queue.type = type;
|
dma->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
|
dma->queue.lock = &dma->lock;
|
dma->queue.drv_priv = dma;
|
dma->queue.buf_struct_size = sizeof(struct xvip_dma_buffer);
|
dma->queue.ops = &xvip_dma_queue_qops;
|
dma->queue.mem_ops = &vb2_dma_contig_memops;
|
dma->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
|
| V4L2_BUF_FLAG_TSTAMP_SRC_EOF;
|
dma->queue.dev = dma->xdev->dev;
|
ret = vb2_queue_init(&dma->queue);
|
if (ret < 0) {
|
dev_err(dma->xdev->dev, "failed to initialize VB2 queue\n");
|
goto error;
|
}
|
|
/* ... and the DMA channel. */
|
snprintf(name, sizeof(name), "port%u", port);
|
dma->dma = dma_request_chan(dma->xdev->dev, name);
|
if (IS_ERR(dma->dma)) {
|
ret = PTR_ERR(dma->dma);
|
if (ret != -EPROBE_DEFER)
|
dev_err(dma->xdev->dev, "no VDMA channel found\n");
|
goto error;
|
}
|
|
dma->align = 1 << dma->dma->device->copy_align;
|
|
ret = video_register_device(&dma->video, VFL_TYPE_VIDEO, -1);
|
if (ret < 0) {
|
dev_err(dma->xdev->dev, "failed to register video device\n");
|
goto error;
|
}
|
|
return 0;
|
|
error:
|
xvip_dma_cleanup(dma);
|
return ret;
|
}
|
|
void xvip_dma_cleanup(struct xvip_dma *dma)
|
{
|
if (video_is_registered(&dma->video))
|
video_unregister_device(&dma->video);
|
|
if (!IS_ERR_OR_NULL(dma->dma))
|
dma_release_channel(dma->dma);
|
|
media_entity_cleanup(&dma->video.entity);
|
|
mutex_destroy(&dma->lock);
|
mutex_destroy(&dma->pipe.lock);
|
}
|
