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OpenCloudOS-Kernel/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing)
* All rights reserved.
* Author: Yong Deng <yong.deng@magewell.com>
*/
#include <linux/of.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mc.h>
#include <media/videobuf2-dma-contig.h>
#include <media/videobuf2-v4l2.h>
#include "sun6i_csi.h"
#include "sun6i_video.h"
/* This is got from BSP sources. */
#define MIN_WIDTH (32)
#define MIN_HEIGHT (32)
#define MAX_WIDTH (4800)
#define MAX_HEIGHT (4800)
struct sun6i_csi_buffer {
struct vb2_v4l2_buffer vb;
struct list_head list;
dma_addr_t dma_addr;
bool queued_to_csi;
};
static const u32 supported_pixformats[] = {
V4L2_PIX_FMT_SBGGR8,
V4L2_PIX_FMT_SGBRG8,
V4L2_PIX_FMT_SGRBG8,
V4L2_PIX_FMT_SRGGB8,
V4L2_PIX_FMT_SBGGR10,
V4L2_PIX_FMT_SGBRG10,
V4L2_PIX_FMT_SGRBG10,
V4L2_PIX_FMT_SRGGB10,
V4L2_PIX_FMT_SBGGR12,
V4L2_PIX_FMT_SGBRG12,
V4L2_PIX_FMT_SGRBG12,
V4L2_PIX_FMT_SRGGB12,
V4L2_PIX_FMT_YUYV,
V4L2_PIX_FMT_YVYU,
V4L2_PIX_FMT_UYVY,
V4L2_PIX_FMT_VYUY,
V4L2_PIX_FMT_HM12,
V4L2_PIX_FMT_NV12,
V4L2_PIX_FMT_NV21,
V4L2_PIX_FMT_YUV420,
V4L2_PIX_FMT_YVU420,
V4L2_PIX_FMT_NV16,
V4L2_PIX_FMT_NV61,
V4L2_PIX_FMT_YUV422P,
};
static bool is_pixformat_valid(unsigned int pixformat)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(supported_pixformats); i++)
if (supported_pixformats[i] == pixformat)
return true;
return false;
}
static struct v4l2_subdev *
sun6i_video_remote_subdev(struct sun6i_video *video, u32 *pad)
{
struct media_pad *remote;
remote = media_entity_remote_pad(&video->pad);
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 sun6i_video_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers,
unsigned int *nplanes,
unsigned int sizes[],
struct device *alloc_devs[])
{
struct sun6i_video *video = vb2_get_drv_priv(vq);
unsigned int size = video->fmt.fmt.pix.sizeimage;
if (*nplanes)
return sizes[0] < size ? -EINVAL : 0;
*nplanes = 1;
sizes[0] = size;
return 0;
}
static int sun6i_video_buffer_prepare(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct sun6i_csi_buffer *buf =
container_of(vbuf, struct sun6i_csi_buffer, vb);
struct sun6i_video *video = vb2_get_drv_priv(vb->vb2_queue);
unsigned long size = video->fmt.fmt.pix.sizeimage;
if (vb2_plane_size(vb, 0) < size) {
v4l2_err(video->vdev.v4l2_dev, "buffer too small (%lu < %lu)\n",
vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0, size);
buf->dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
vbuf->field = video->fmt.fmt.pix.field;
return 0;
}
static int sun6i_video_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct sun6i_video *video = vb2_get_drv_priv(vq);
struct sun6i_csi_buffer *buf;
struct sun6i_csi_buffer *next_buf;
struct sun6i_csi_config config;
struct v4l2_subdev *subdev;
unsigned long flags;
int ret;
video->sequence = 0;
ret = media_pipeline_start(&video->vdev.entity, &video->vdev.pipe);
if (ret < 0)
goto clear_dma_queue;
if (video->mbus_code == 0) {
ret = -EINVAL;
goto stop_media_pipeline;
}
subdev = sun6i_video_remote_subdev(video, NULL);
if (!subdev)
goto stop_media_pipeline;
config.pixelformat = video->fmt.fmt.pix.pixelformat;
config.code = video->mbus_code;
config.field = video->fmt.fmt.pix.field;
config.width = video->fmt.fmt.pix.width;
config.height = video->fmt.fmt.pix.height;
ret = sun6i_csi_update_config(video->csi, &config);
if (ret < 0)
goto stop_media_pipeline;
spin_lock_irqsave(&video->dma_queue_lock, flags);
buf = list_first_entry(&video->dma_queue,
struct sun6i_csi_buffer, list);
buf->queued_to_csi = true;
sun6i_csi_update_buf_addr(video->csi, buf->dma_addr);
sun6i_csi_set_stream(video->csi, true);
/*
* CSI will lookup the next dma buffer for next frame before the
* the current frame done IRQ triggered. This is not documented
* but reported by Ondřej Jirman.
* The BSP code has workaround for this too. It skip to mark the
* first buffer as frame done for VB2 and pass the second buffer
* to CSI in the first frame done ISR call. Then in second frame
* done ISR call, it mark the first buffer as frame done for VB2
* and pass the third buffer to CSI. And so on. The bad thing is
* that the first buffer will be written twice and the first frame
* is dropped even the queued buffer is sufficient.
* So, I make some improvement here. Pass the next buffer to CSI
* just follow starting the CSI. In this case, the first frame
* will be stored in first buffer, second frame in second buffer.
* This method is used to avoid dropping the first frame, it
* would also drop frame when lacking of queued buffer.
*/
next_buf = list_next_entry(buf, list);
next_buf->queued_to_csi = true;
sun6i_csi_update_buf_addr(video->csi, next_buf->dma_addr);
spin_unlock_irqrestore(&video->dma_queue_lock, flags);
ret = v4l2_subdev_call(subdev, video, s_stream, 1);
if (ret && ret != -ENOIOCTLCMD)
goto stop_csi_stream;
return 0;
stop_csi_stream:
sun6i_csi_set_stream(video->csi, false);
stop_media_pipeline:
media_pipeline_stop(&video->vdev.entity);
clear_dma_queue:
spin_lock_irqsave(&video->dma_queue_lock, flags);
list_for_each_entry(buf, &video->dma_queue, list)
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
INIT_LIST_HEAD(&video->dma_queue);
spin_unlock_irqrestore(&video->dma_queue_lock, flags);
return ret;
}
static void sun6i_video_stop_streaming(struct vb2_queue *vq)
{
struct sun6i_video *video = vb2_get_drv_priv(vq);
struct v4l2_subdev *subdev;
unsigned long flags;
struct sun6i_csi_buffer *buf;
subdev = sun6i_video_remote_subdev(video, NULL);
if (subdev)
v4l2_subdev_call(subdev, video, s_stream, 0);
sun6i_csi_set_stream(video->csi, false);
media_pipeline_stop(&video->vdev.entity);
/* Release all active buffers */
spin_lock_irqsave(&video->dma_queue_lock, flags);
list_for_each_entry(buf, &video->dma_queue, list)
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
INIT_LIST_HEAD(&video->dma_queue);
spin_unlock_irqrestore(&video->dma_queue_lock, flags);
}
static void sun6i_video_buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct sun6i_csi_buffer *buf =
container_of(vbuf, struct sun6i_csi_buffer, vb);
struct sun6i_video *video = vb2_get_drv_priv(vb->vb2_queue);
unsigned long flags;
spin_lock_irqsave(&video->dma_queue_lock, flags);
buf->queued_to_csi = false;
list_add_tail(&buf->list, &video->dma_queue);
spin_unlock_irqrestore(&video->dma_queue_lock, flags);
}
void sun6i_video_frame_done(struct sun6i_video *video)
{
struct sun6i_csi_buffer *buf;
struct sun6i_csi_buffer *next_buf;
struct vb2_v4l2_buffer *vbuf;
spin_lock(&video->dma_queue_lock);
buf = list_first_entry(&video->dma_queue,
struct sun6i_csi_buffer, list);
if (list_is_last(&buf->list, &video->dma_queue)) {
dev_dbg(video->csi->dev, "Frame droped!\n");
goto unlock;
}
next_buf = list_next_entry(buf, list);
/* If a new buffer (#next_buf) had not been queued to CSI, the old
* buffer (#buf) is still holding by CSI for storing the next
* frame. So, we queue a new buffer (#next_buf) to CSI then wait
* for next ISR call.
*/
if (!next_buf->queued_to_csi) {
next_buf->queued_to_csi = true;
sun6i_csi_update_buf_addr(video->csi, next_buf->dma_addr);
dev_dbg(video->csi->dev, "Frame droped!\n");
goto unlock;
}
list_del(&buf->list);
vbuf = &buf->vb;
vbuf->vb2_buf.timestamp = ktime_get_ns();
vbuf->sequence = video->sequence;
vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
/* Prepare buffer for next frame but one. */
if (!list_is_last(&next_buf->list, &video->dma_queue)) {
next_buf = list_next_entry(next_buf, list);
next_buf->queued_to_csi = true;
sun6i_csi_update_buf_addr(video->csi, next_buf->dma_addr);
} else {
dev_dbg(video->csi->dev, "Next frame will be dropped!\n");
}
unlock:
video->sequence++;
spin_unlock(&video->dma_queue_lock);
}
static const struct vb2_ops sun6i_csi_vb2_ops = {
.queue_setup = sun6i_video_queue_setup,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
.buf_prepare = sun6i_video_buffer_prepare,
.start_streaming = sun6i_video_start_streaming,
.stop_streaming = sun6i_video_stop_streaming,
.buf_queue = sun6i_video_buffer_queue,
};
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct sun6i_video *video = video_drvdata(file);
strscpy(cap->driver, "sun6i-video", sizeof(cap->driver));
strscpy(cap->card, video->vdev.name, sizeof(cap->card));
snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
video->csi->dev->of_node->name);
return 0;
}
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
u32 index = f->index;
if (index >= ARRAY_SIZE(supported_pixformats))
return -EINVAL;
f->pixelformat = supported_pixformats[index];
return 0;
}
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct sun6i_video *video = video_drvdata(file);
*fmt = video->fmt;
return 0;
}
static int sun6i_video_try_fmt(struct sun6i_video *video,
struct v4l2_format *f)
{
struct v4l2_pix_format *pixfmt = &f->fmt.pix;
int bpp;
if (!is_pixformat_valid(pixfmt->pixelformat))
pixfmt->pixelformat = supported_pixformats[0];
v4l_bound_align_image(&pixfmt->width, MIN_WIDTH, MAX_WIDTH, 1,
&pixfmt->height, MIN_HEIGHT, MAX_WIDTH, 1, 1);
bpp = sun6i_csi_get_bpp(pixfmt->pixelformat);
pixfmt->bytesperline = (pixfmt->width * bpp) >> 3;
pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
if (pixfmt->field == V4L2_FIELD_ANY)
pixfmt->field = V4L2_FIELD_NONE;
pixfmt->colorspace = V4L2_COLORSPACE_RAW;
pixfmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
pixfmt->quantization = V4L2_QUANTIZATION_DEFAULT;
pixfmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
return 0;
}
static int sun6i_video_set_fmt(struct sun6i_video *video, struct v4l2_format *f)
{
int ret;
ret = sun6i_video_try_fmt(video, f);
if (ret)
return ret;
video->fmt = *f;
return 0;
}
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sun6i_video *video = video_drvdata(file);
if (vb2_is_busy(&video->vb2_vidq))
return -EBUSY;
return sun6i_video_set_fmt(video, f);
}
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sun6i_video *video = video_drvdata(file);
return sun6i_video_try_fmt(video, f);
}
static int vidioc_enum_input(struct file *file, void *fh,
struct v4l2_input *inp)
{
if (inp->index != 0)
return -EINVAL;
strlcpy(inp->name, "camera", sizeof(inp->name));
inp->type = V4L2_INPUT_TYPE_CAMERA;
return 0;
}
static int vidioc_g_input(struct file *file, void *fh, unsigned int *i)
{
*i = 0;
return 0;
}
static int vidioc_s_input(struct file *file, void *fh, unsigned int i)
{
if (i != 0)
return -EINVAL;
return 0;
}
static const struct v4l2_ioctl_ops sun6i_video_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
.vidioc_enum_input = vidioc_enum_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
/* -----------------------------------------------------------------------------
* V4L2 file operations
*/
static int sun6i_video_open(struct file *file)
{
struct sun6i_video *video = video_drvdata(file);
int ret;
if (mutex_lock_interruptible(&video->lock))
return -ERESTARTSYS;
ret = v4l2_fh_open(file);
if (ret < 0)
goto unlock;
ret = v4l2_pipeline_pm_use(&video->vdev.entity, 1);
if (ret < 0)
goto fh_release;
/* check if already powered */
if (!v4l2_fh_is_singular_file(file))
goto unlock;
ret = sun6i_csi_set_power(video->csi, true);
if (ret < 0)
goto fh_release;
mutex_unlock(&video->lock);
return 0;
fh_release:
v4l2_fh_release(file);
unlock:
mutex_unlock(&video->lock);
return ret;
}
static int sun6i_video_close(struct file *file)
{
struct sun6i_video *video = video_drvdata(file);
bool last_fh;
mutex_lock(&video->lock);
last_fh = v4l2_fh_is_singular_file(file);
_vb2_fop_release(file, NULL);
v4l2_pipeline_pm_use(&video->vdev.entity, 0);
if (last_fh)
sun6i_csi_set_power(video->csi, false);
mutex_unlock(&video->lock);
return 0;
}
static const struct v4l2_file_operations sun6i_video_fops = {
.owner = THIS_MODULE,
.open = sun6i_video_open,
.release = sun6i_video_close,
.unlocked_ioctl = video_ioctl2,
.mmap = vb2_fop_mmap,
.poll = vb2_fop_poll
};
/* -----------------------------------------------------------------------------
* Media Operations
*/
static int sun6i_video_link_validate_get_format(struct media_pad *pad,
struct v4l2_subdev_format *fmt)
{
if (is_media_entity_v4l2_subdev(pad->entity)) {
struct v4l2_subdev *sd =
media_entity_to_v4l2_subdev(pad->entity);
fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
fmt->pad = pad->index;
return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
}
return -EINVAL;
}
static int sun6i_video_link_validate(struct media_link *link)
{
struct video_device *vdev = container_of(link->sink->entity,
struct video_device, entity);
struct sun6i_video *video = video_get_drvdata(vdev);
struct v4l2_subdev_format source_fmt;
int ret;
video->mbus_code = 0;
if (!media_entity_remote_pad(link->sink->entity->pads)) {
dev_info(video->csi->dev,
"video node %s pad not connected\n", vdev->name);
return -ENOLINK;
}
ret = sun6i_video_link_validate_get_format(link->source, &source_fmt);
if (ret < 0)
return ret;
if (!sun6i_csi_is_format_supported(video->csi,
video->fmt.fmt.pix.pixelformat,
source_fmt.format.code)) {
dev_err(video->csi->dev,
"Unsupported pixformat: 0x%x with mbus code: 0x%x!\n",
video->fmt.fmt.pix.pixelformat,
source_fmt.format.code);
return -EPIPE;
}
if (source_fmt.format.width != video->fmt.fmt.pix.width ||
source_fmt.format.height != video->fmt.fmt.pix.height) {
dev_err(video->csi->dev,
"Wrong width or height %ux%u (%ux%u expected)\n",
video->fmt.fmt.pix.width, video->fmt.fmt.pix.height,
source_fmt.format.width, source_fmt.format.height);
return -EPIPE;
}
video->mbus_code = source_fmt.format.code;
return 0;
}
static const struct media_entity_operations sun6i_video_media_ops = {
.link_validate = sun6i_video_link_validate
};
int sun6i_video_init(struct sun6i_video *video, struct sun6i_csi *csi,
const char *name)
{
struct video_device *vdev = &video->vdev;
struct vb2_queue *vidq = &video->vb2_vidq;
struct v4l2_format fmt = { 0 };
int ret;
video->csi = csi;
/* Initialize the media entity... */
video->pad.flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT;
vdev->entity.ops = &sun6i_video_media_ops;
ret = media_entity_pads_init(&vdev->entity, 1, &video->pad);
if (ret < 0)
return ret;
mutex_init(&video->lock);
INIT_LIST_HEAD(&video->dma_queue);
spin_lock_init(&video->dma_queue_lock);
video->sequence = 0;
/* Setup default format */
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmt.fmt.pix.pixelformat = supported_pixformats[0];
fmt.fmt.pix.width = 1280;
fmt.fmt.pix.height = 720;
fmt.fmt.pix.field = V4L2_FIELD_NONE;
sun6i_video_set_fmt(video, &fmt);
/* Initialize videobuf2 queue */
vidq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
vidq->io_modes = VB2_MMAP | VB2_DMABUF;
vidq->drv_priv = video;
vidq->buf_struct_size = sizeof(struct sun6i_csi_buffer);
vidq->ops = &sun6i_csi_vb2_ops;
vidq->mem_ops = &vb2_dma_contig_memops;
vidq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
vidq->lock = &video->lock;
/* Make sure non-dropped frame */
vidq->min_buffers_needed = 3;
vidq->dev = csi->dev;
ret = vb2_queue_init(vidq);
if (ret) {
v4l2_err(&csi->v4l2_dev, "vb2_queue_init failed: %d\n", ret);
goto clean_entity;
}
/* Register video device */
strlcpy(vdev->name, name, sizeof(vdev->name));
vdev->release = video_device_release_empty;
vdev->fops = &sun6i_video_fops;
vdev->ioctl_ops = &sun6i_video_ioctl_ops;
vdev->vfl_type = VFL_TYPE_GRABBER;
vdev->vfl_dir = VFL_DIR_RX;
vdev->v4l2_dev = &csi->v4l2_dev;
vdev->queue = vidq;
vdev->lock = &video->lock;
vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
video_set_drvdata(vdev, video);
ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
if (ret < 0) {
v4l2_err(&csi->v4l2_dev,
"video_register_device failed: %d\n", ret);
goto release_vb2;
}
return 0;
release_vb2:
vb2_queue_release(&video->vb2_vidq);
clean_entity:
media_entity_cleanup(&video->vdev.entity);
mutex_destroy(&video->lock);
return ret;
}
void sun6i_video_cleanup(struct sun6i_video *video)
{
video_unregister_device(&video->vdev);
media_entity_cleanup(&video->vdev.entity);
vb2_queue_release(&video->vb2_vidq);
mutex_destroy(&video->lock);
}
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