// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 NextThing Co
* Copyright (C) 2016-2019 Bootlin
*
* Author: Maxime Ripard <[email protected]>
*/
#include <linux/device.h>
#include <linux/pm_runtime.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mc.h>
#include <media/videobuf2-v4l2.h>
#include "sun4i_csi.h"
#define CSI_DEFAULT_WIDTH 640
#define CSI_DEFAULT_HEIGHT 480
static const struct sun4i_csi_format sun4i_csi_formats[] = {
/* YUV422 inputs */
{
.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
.fourcc = V4L2_PIX_FMT_YUV420M,
.input = CSI_INPUT_YUV,
.output = CSI_OUTPUT_YUV_420_PLANAR,
.num_planes = 3,
.bpp = { 8, 8, 8 },
.hsub = 2,
.vsub = 2,
},
};
const struct sun4i_csi_format *sun4i_csi_find_format(const u32 *fourcc,
const u32 *mbus)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(sun4i_csi_formats); i++) {
if (fourcc && *fourcc != sun4i_csi_formats[i].fourcc)
continue;
if (mbus && *mbus != sun4i_csi_formats[i].mbus)
continue;
return &sun4i_csi_formats[i];
}
return NULL;
}
static int sun4i_csi_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
strscpy(cap->card, "sun4i-csi", sizeof(cap->card));
return 0;
}
static int sun4i_csi_enum_input(struct file *file, void *priv,
struct v4l2_input *inp)
{
if (inp->index != 0)
return -EINVAL;
inp->type = V4L2_INPUT_TYPE_CAMERA;
strscpy(inp->name, "Camera", sizeof(inp->name));
return 0;
}
static int sun4i_csi_g_input(struct file *file, void *fh,
unsigned int *i)
{
*i = 0;
return 0;
}
static int sun4i_csi_s_input(struct file *file, void *fh,
unsigned int i)
{
if (i != 0)
return -EINVAL;
return 0;
}
static void _sun4i_csi_try_fmt(struct sun4i_csi *csi,
struct v4l2_pix_format_mplane *pix)
{
const struct sun4i_csi_format *_fmt;
unsigned int height, width;
unsigned int i;
_fmt = sun4i_csi_find_format(&pix->pixelformat, NULL);
if (!_fmt)
_fmt = &sun4i_csi_formats[0];
pix->field = V4L2_FIELD_NONE;
pix->colorspace = V4L2_COLORSPACE_SRGB;
pix->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix->colorspace);
pix->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix->colorspace);
pix->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true, pix->colorspace,
pix->ycbcr_enc);
pix->num_planes = _fmt->num_planes;
pix->pixelformat = _fmt->fourcc;
/* Align the width and height on the subsampling */
width = ALIGN(pix->width, _fmt->hsub);
height = ALIGN(pix->height, _fmt->vsub);
/* Clamp the width and height to our capabilities */
pix->width = clamp(width, _fmt->hsub, CSI_MAX_WIDTH);
pix->height = clamp(height, _fmt->vsub, CSI_MAX_HEIGHT);
for (i = 0; i < _fmt->num_planes; i++) {
unsigned int hsub = i > 0 ? _fmt->hsub : 1;
unsigned int vsub = i > 0 ? _fmt->vsub : 1;
unsigned int bpl;
bpl = pix->width / hsub * _fmt->bpp[i] / 8;
pix->plane_fmt[i].bytesperline = bpl;
pix->plane_fmt[i].sizeimage = bpl * pix->height / vsub;
}
}
static int sun4i_csi_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sun4i_csi *csi = video_drvdata(file);
_sun4i_csi_try_fmt(csi, &f->fmt.pix_mp);
return 0;
}
static int sun4i_csi_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sun4i_csi *csi = video_drvdata(file);
_sun4i_csi_try_fmt(csi, &f->fmt.pix_mp);
csi->fmt = f->fmt.pix_mp;
return 0;
}
static int sun4i_csi_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sun4i_csi *csi = video_drvdata(file);
f->fmt.pix_mp = csi->fmt;
return 0;
}
static int sun4i_csi_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
if (f->index >= ARRAY_SIZE(sun4i_csi_formats))
return -EINVAL;
f->pixelformat = sun4i_csi_formats[f->index].fourcc;
return 0;
}
static const struct v4l2_ioctl_ops sun4i_csi_ioctl_ops = {
.vidioc_querycap = sun4i_csi_querycap,
.vidioc_enum_fmt_vid_cap = sun4i_csi_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap_mplane = sun4i_csi_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap_mplane = sun4i_csi_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap_mplane = sun4i_csi_try_fmt_vid_cap,
.vidioc_enum_input = sun4i_csi_enum_input,
.vidioc_g_input = sun4i_csi_g_input,
.vidioc_s_input = sun4i_csi_s_input,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
};
static int sun4i_csi_open(struct file *file)
{
struct sun4i_csi *csi = video_drvdata(file);
int ret;
ret = mutex_lock_interruptible(&csi->lock);
if (ret)
return ret;
ret = pm_runtime_resume_and_get(csi->dev);
if (ret < 0)
goto err_unlock;
ret = v4l2_pipeline_pm_get(&csi->vdev.entity);
if (ret)
goto err_pm_put;
ret = v4l2_fh_open(file);
if (ret)
goto err_pipeline_pm_put;
mutex_unlock(&csi->lock);
return 0;
err_pipeline_pm_put:
v4l2_pipeline_pm_put(&csi->vdev.entity);
err_pm_put:
pm_runtime_put(csi->dev);
err_unlock:
mutex_unlock(&csi->lock);
return ret;
}
static int sun4i_csi_release(struct file *file)
{
struct sun4i_csi *csi = video_drvdata(file);
mutex_lock(&csi->lock);
_vb2_fop_release(file, NULL);
v4l2_pipeline_pm_put(&csi->vdev.entity);
pm_runtime_put(csi->dev);
mutex_unlock(&csi->lock);
return 0;
}
static const struct v4l2_file_operations sun4i_csi_fops = {
.owner = THIS_MODULE,
.open = sun4i_csi_open,
.release = sun4i_csi_release,
.unlocked_ioctl = video_ioctl2,
.poll = vb2_fop_poll,
.mmap = vb2_fop_mmap,
};
static const struct v4l2_mbus_framefmt sun4i_csi_pad_fmt_default = {
.width = CSI_DEFAULT_WIDTH,
.height = CSI_DEFAULT_HEIGHT,
.code = MEDIA_BUS_FMT_YUYV8_2X8,
.field = V4L2_FIELD_NONE,
.colorspace = V4L2_COLORSPACE_RAW,
.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT,
.quantization = V4L2_QUANTIZATION_DEFAULT,
.xfer_func = V4L2_XFER_FUNC_DEFAULT,
};
static int sun4i_csi_subdev_init_state(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state)
{
struct v4l2_mbus_framefmt *fmt;
fmt = v4l2_subdev_state_get_format(sd_state, CSI_SUBDEV_SINK);
*fmt = sun4i_csi_pad_fmt_default;
return 0;
}
static int sun4i_csi_subdev_get_fmt(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct sun4i_csi *csi = container_of(subdev, struct sun4i_csi, subdev);
struct v4l2_mbus_framefmt *subdev_fmt;
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
subdev_fmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
else
subdev_fmt = &csi->subdev_fmt;
fmt->format = *subdev_fmt;
return 0;
}
static int sun4i_csi_subdev_set_fmt(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct sun4i_csi *csi = container_of(subdev, struct sun4i_csi, subdev);
struct v4l2_mbus_framefmt *subdev_fmt;
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
subdev_fmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
else
subdev_fmt = &csi->subdev_fmt;
/* We can only set the format on the sink pad */
if (fmt->pad == CSI_SUBDEV_SINK) {
/* It's the sink, only allow changing the frame size */
subdev_fmt->width = fmt->format.width;
subdev_fmt->height = fmt->format.height;
subdev_fmt->code = fmt->format.code;
}
fmt->format = *subdev_fmt;
return 0;
}
static int
sun4i_csi_subdev_enum_mbus_code(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *mbus)
{
if (mbus->index >= ARRAY_SIZE(sun4i_csi_formats))
return -EINVAL;
mbus->code = sun4i_csi_formats[mbus->index].mbus;
return 0;
}
static const struct v4l2_subdev_pad_ops sun4i_csi_subdev_pad_ops = {
.link_validate = v4l2_subdev_link_validate_default,
.get_fmt = sun4i_csi_subdev_get_fmt,
.set_fmt = sun4i_csi_subdev_set_fmt,
.enum_mbus_code = sun4i_csi_subdev_enum_mbus_code,
};
const struct v4l2_subdev_ops sun4i_csi_subdev_ops = {
.pad = &sun4i_csi_subdev_pad_ops,
};
const struct v4l2_subdev_internal_ops sun4i_csi_subdev_internal_ops = {
.init_state = sun4i_csi_subdev_init_state,
};
int sun4i_csi_v4l2_register(struct sun4i_csi *csi)
{
struct video_device *vdev = &csi->vdev;
int ret;
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING;
vdev->v4l2_dev = &csi->v4l;
vdev->queue = &csi->queue;
strscpy(vdev->name, KBUILD_MODNAME, sizeof(vdev->name));
vdev->release = video_device_release_empty;
vdev->lock = &csi->lock;
/* Set a default format */
csi->fmt.pixelformat = sun4i_csi_formats[0].fourcc;
csi->fmt.width = CSI_DEFAULT_WIDTH;
csi->fmt.height = CSI_DEFAULT_HEIGHT;
_sun4i_csi_try_fmt(csi, &csi->fmt);
csi->subdev_fmt = sun4i_csi_pad_fmt_default;
vdev->fops = &sun4i_csi_fops;
vdev->ioctl_ops = &sun4i_csi_ioctl_ops;
video_set_drvdata(vdev, csi);
ret = video_register_device(&csi->vdev, VFL_TYPE_VIDEO, -1);
if (ret)
return ret;
dev_info(csi->dev, "Device registered as %s\n",
video_device_node_name(vdev));
return 0;
}
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