// SPDX-License-Identifier: GPL-2.0-only
/*
* TI Camera Access Layer (CAL) - Video Device
*
* Copyright (c) 2015-2020 Texas Instruments Inc.
*
* Authors:
* Benoit Parrot <[email protected]>
* Laurent Pinchart <[email protected]>
*/
#include <linux/ioctl.h>
#include <linux/pm_runtime.h>
#include <linux/videodev2.h>
#include <media/media-device.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-core.h>
#include <media/videobuf2-dma-contig.h>
#include "cal.h"
/* Print Four-character-code (FOURCC) */
static char *fourcc_to_str(u32 fmt)
{
static char code[5];
code[0] = (unsigned char)(fmt & 0xff);
code[1] = (unsigned char)((fmt >> 8) & 0xff);
code[2] = (unsigned char)((fmt >> 16) & 0xff);
code[3] = (unsigned char)((fmt >> 24) & 0xff);
code[4] = '\0';
return code;
}
/* ------------------------------------------------------------------
* V4L2 Common IOCTLs
* ------------------------------------------------------------------
*/
static int cal_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strscpy(cap->driver, CAL_MODULE_NAME, sizeof(cap->driver));
strscpy(cap->card, CAL_MODULE_NAME, sizeof(cap->card));
return 0;
}
static int cal_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct cal_ctx *ctx = video_drvdata(file);
*f = ctx->v_fmt;
return 0;
}
/* ------------------------------------------------------------------
* V4L2 Video Node Centric IOCTLs
* ------------------------------------------------------------------
*/
static const struct cal_format_info *find_format_by_pix(struct cal_ctx *ctx,
u32 pixelformat)
{
const struct cal_format_info *fmtinfo;
unsigned int k;
for (k = 0; k < ctx->num_active_fmt; k++) {
fmtinfo = ctx->active_fmt[k];
if (fmtinfo->fourcc == pixelformat)
return fmtinfo;
}
return NULL;
}
static const struct cal_format_info *find_format_by_code(struct cal_ctx *ctx,
u32 code)
{
const struct cal_format_info *fmtinfo;
unsigned int k;
for (k = 0; k < ctx->num_active_fmt; k++) {
fmtinfo = ctx->active_fmt[k];
if (fmtinfo->code == code)
return fmtinfo;
}
return NULL;
}
static int cal_legacy_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct cal_ctx *ctx = video_drvdata(file);
const struct cal_format_info *fmtinfo;
if (f->index >= ctx->num_active_fmt)
return -EINVAL;
fmtinfo = ctx->active_fmt[f->index];
f->pixelformat = fmtinfo->fourcc;
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
return 0;
}
static int __subdev_get_format(struct cal_ctx *ctx,
struct v4l2_mbus_framefmt *fmt)
{
struct v4l2_subdev_format sd_fmt = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
.pad = 0,
};
struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
int ret;
ret = v4l2_subdev_call(ctx->phy->source, pad, get_fmt, NULL, &sd_fmt);
if (ret)
return ret;
*fmt = *mbus_fmt;
ctx_dbg(1, ctx, "%s %dx%d code:%04X\n", __func__,
fmt->width, fmt->height, fmt->code);
return 0;
}
static int __subdev_set_format(struct cal_ctx *ctx,
struct v4l2_mbus_framefmt *fmt)
{
struct v4l2_subdev_format sd_fmt = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
.pad = 0,
};
struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
int ret;
*mbus_fmt = *fmt;
ret = v4l2_subdev_call(ctx->phy->source, pad, set_fmt, NULL, &sd_fmt);
if (ret)
return ret;
ctx_dbg(1, ctx, "%s %dx%d code:%04X\n", __func__,
fmt->width, fmt->height, fmt->code);
return 0;
}
static void cal_calc_format_size(struct cal_ctx *ctx,
const struct cal_format_info *fmtinfo,
struct v4l2_format *f)
{
u32 bpl, max_width;
/*
* Maximum width is bound by the DMA max width in bytes.
* We need to recalculate the actual maxi width depending on the
* number of bytes per pixels required.
*/
max_width = CAL_MAX_WIDTH_BYTES / (ALIGN(fmtinfo->bpp, 8) >> 3);
v4l_bound_align_image(&f->fmt.pix.width, 48, max_width, 2,
&f->fmt.pix.height, 32, CAL_MAX_HEIGHT_LINES,
0, 0);
bpl = (f->fmt.pix.width * ALIGN(fmtinfo->bpp, 8)) >> 3;
f->fmt.pix.bytesperline = ALIGN(bpl, 16);
f->fmt.pix.sizeimage = f->fmt.pix.height *
f->fmt.pix.bytesperline;
ctx_dbg(3, ctx, "%s: fourcc: %s size: %dx%d bpl:%d img_size:%d\n",
__func__, fourcc_to_str(f->fmt.pix.pixelformat),
f->fmt.pix.width, f->fmt.pix.height,
f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
}
static int cal_legacy_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct cal_ctx *ctx = video_drvdata(file);
const struct cal_format_info *fmtinfo;
struct v4l2_subdev_frame_size_enum fse = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
int found;
fmtinfo = find_format_by_pix(ctx, f->fmt.pix.pixelformat);
if (!fmtinfo) {
ctx_dbg(3, ctx, "Fourcc format (0x%08x) not found.\n",
f->fmt.pix.pixelformat);
/* Just get the first one enumerated */
fmtinfo = ctx->active_fmt[0];
f->fmt.pix.pixelformat = fmtinfo->fourcc;
}
f->fmt.pix.field = ctx->v_fmt.fmt.pix.field;
/* check for/find a valid width/height */
found = false;
fse.pad = 0;
fse.code = fmtinfo->code;
for (fse.index = 0; ; fse.index++) {
int ret;
ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_size,
NULL, &fse);
if (ret)
break;
if ((f->fmt.pix.width == fse.max_width) &&
(f->fmt.pix.height == fse.max_height)) {
found = true;
break;
} else if ((f->fmt.pix.width >= fse.min_width) &&
(f->fmt.pix.width <= fse.max_width) &&
(f->fmt.pix.height >= fse.min_height) &&
(f->fmt.pix.height <= fse.max_height)) {
found = true;
break;
}
}
if (!found) {
/* use existing values as default */
f->fmt.pix.width = ctx->v_fmt.fmt.pix.width;
f->fmt.pix.height = ctx->v_fmt.fmt.pix.height;
}
/*
* Use current colorspace for now, it will get
* updated properly during s_fmt
*/
f->fmt.pix.colorspace = ctx->v_fmt.fmt.pix.colorspace;
cal_calc_format_size(ctx, fmtinfo, f);
return 0;
}
static int cal_legacy_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct cal_ctx *ctx = video_drvdata(file);
struct vb2_queue *q = &ctx->vb_vidq;
struct v4l2_subdev_format sd_fmt = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
.pad = CAL_CAMERARX_PAD_SINK,
};
const struct cal_format_info *fmtinfo;
int ret;
if (vb2_is_busy(q)) {
ctx_dbg(3, ctx, "%s device busy\n", __func__);
return -EBUSY;
}
ret = cal_legacy_try_fmt_vid_cap(file, priv, f);
if (ret < 0)
return ret;
fmtinfo = find_format_by_pix(ctx, f->fmt.pix.pixelformat);
v4l2_fill_mbus_format(&sd_fmt.format, &f->fmt.pix, fmtinfo->code);
ret = __subdev_set_format(ctx, &sd_fmt.format);
if (ret)
return ret;
/* Just double check nothing has gone wrong */
if (sd_fmt.format.code != fmtinfo->code) {
ctx_dbg(3, ctx,
"%s subdev changed format on us, this should not happen\n",
__func__);
return -EINVAL;
}
v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &sd_fmt.format);
ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ctx->v_fmt.fmt.pix.pixelformat = fmtinfo->fourcc;
ctx->v_fmt.fmt.pix.field = sd_fmt.format.field;
cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt);
v4l2_subdev_call(&ctx->phy->subdev, pad, set_fmt, NULL, &sd_fmt);
ctx->fmtinfo = fmtinfo;
*f = ctx->v_fmt;
return 0;
}
static int cal_legacy_enum_framesizes(struct file *file, void *fh,
struct v4l2_frmsizeenum *fsize)
{
struct cal_ctx *ctx = video_drvdata(file);
const struct cal_format_info *fmtinfo;
struct v4l2_subdev_frame_size_enum fse = {
.index = fsize->index,
.pad = 0,
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
int ret;
/* check for valid format */
fmtinfo = find_format_by_pix(ctx, fsize->pixel_format);
if (!fmtinfo) {
ctx_dbg(3, ctx, "Invalid pixel code: %x\n",
fsize->pixel_format);
return -EINVAL;
}
fse.code = fmtinfo->code;
ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_size, NULL,
&fse);
if (ret)
return ret;
ctx_dbg(1, ctx, "%s: index: %d code: %x W:[%d,%d] H:[%d,%d]\n",
__func__, fse.index, fse.code, fse.min_width, fse.max_width,
fse.min_height, fse.max_height);
fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
fsize->discrete.width = fse.max_width;
fsize->discrete.height = fse.max_height;
return 0;
}
static int cal_legacy_enum_input(struct file *file, void *priv,
struct v4l2_input *inp)
{
if (inp->index > 0)
return -EINVAL;
inp->type = V4L2_INPUT_TYPE_CAMERA;
sprintf(inp->name, "Camera %u", inp->index);
return 0;
}
static int cal_legacy_g_input(struct file *file, void *priv, unsigned int *i)
{
*i = 0;
return 0;
}
static int cal_legacy_s_input(struct file *file, void *priv, unsigned int i)
{
return i > 0 ? -EINVAL : 0;
}
/* timeperframe is arbitrary and continuous */
static int cal_legacy_enum_frameintervals(struct file *file, void *priv,
struct v4l2_frmivalenum *fival)
{
struct cal_ctx *ctx = video_drvdata(file);
const struct cal_format_info *fmtinfo;
struct v4l2_subdev_frame_interval_enum fie = {
.index = fival->index,
.width = fival->width,
.height = fival->height,
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
int ret;
fmtinfo = find_format_by_pix(ctx, fival->pixel_format);
if (!fmtinfo)
return -EINVAL;
fie.code = fmtinfo->code;
ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_interval,
NULL, &fie);
if (ret)
return ret;
fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
fival->discrete = fie.interval;
return 0;
}
static int cal_legacy_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
{
struct cal_ctx *ctx = video_drvdata(file);
return v4l2_g_parm_cap(video_devdata(file), ctx->phy->source, a);
}
static int cal_legacy_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
{
struct cal_ctx *ctx = video_drvdata(file);
return v4l2_s_parm_cap(video_devdata(file), ctx->phy->source, a);
}
static const struct v4l2_ioctl_ops cal_ioctl_legacy_ops = {
.vidioc_querycap = cal_querycap,
.vidioc_enum_fmt_vid_cap = cal_legacy_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = cal_legacy_try_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = cal_legacy_s_fmt_vid_cap,
.vidioc_enum_framesizes = cal_legacy_enum_framesizes,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_enum_input = cal_legacy_enum_input,
.vidioc_g_input = cal_legacy_g_input,
.vidioc_s_input = cal_legacy_s_input,
.vidioc_enum_frameintervals = cal_legacy_enum_frameintervals,
.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,
.vidioc_g_parm = cal_legacy_g_parm,
.vidioc_s_parm = cal_legacy_s_parm,
};
/* ------------------------------------------------------------------
* V4L2 Media Controller Centric IOCTLs
* ------------------------------------------------------------------
*/
static int cal_mc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
unsigned int i;
unsigned int idx;
if (f->index >= cal_num_formats)
return -EINVAL;
idx = 0;
for (i = 0; i < cal_num_formats; ++i) {
if (f->mbus_code && cal_formats[i].code != f->mbus_code)
continue;
if (idx == f->index) {
f->pixelformat = cal_formats[i].fourcc;
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
return 0;
}
idx++;
}
return -EINVAL;
}
static void cal_mc_try_fmt(struct cal_ctx *ctx, struct v4l2_format *f,
const struct cal_format_info **info)
{
struct v4l2_pix_format *format = &f->fmt.pix;
const struct cal_format_info *fmtinfo;
unsigned int bpp;
/*
* Default to the first format if the requested pixel format code isn't
* supported.
*/
fmtinfo = cal_format_by_fourcc(f->fmt.pix.pixelformat);
if (!fmtinfo)
fmtinfo = &cal_formats[0];
/*
* Clamp the size, update the pixel format. The field and colorspace are
* accepted as-is, except for V4L2_FIELD_ANY that is turned into
* V4L2_FIELD_NONE.
*/
bpp = ALIGN(fmtinfo->bpp, 8);
format->width = clamp_t(unsigned int, format->width,
CAL_MIN_WIDTH_BYTES * 8 / bpp,
CAL_MAX_WIDTH_BYTES * 8 / bpp);
format->height = clamp_t(unsigned int, format->height,
CAL_MIN_HEIGHT_LINES, CAL_MAX_HEIGHT_LINES);
format->pixelformat = fmtinfo->fourcc;
if (format->field == V4L2_FIELD_ANY)
format->field = V4L2_FIELD_NONE;
/*
* Calculate the number of bytes per line and the image size. The
* hardware stores the stride as a number of 16 bytes words, in a
* signed 15-bit value. Only 14 bits are thus usable.
*/
format->bytesperline = ALIGN(clamp(format->bytesperline,
format->width * bpp / 8,
((1U << 14) - 1) * 16), 16);
format->sizeimage = format->height * format->bytesperline;
format->colorspace = ctx->v_fmt.fmt.pix.colorspace;
if (info)
*info = fmtinfo;
ctx_dbg(3, ctx, "%s: %s %ux%u (bytesperline %u sizeimage %u)\n",
__func__, fourcc_to_str(format->pixelformat),
format->width, format->height,
format->bytesperline, format->sizeimage);
}
static int cal_mc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct cal_ctx *ctx = video_drvdata(file);
cal_mc_try_fmt(ctx, f, NULL);
return 0;
}
static int cal_mc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct cal_ctx *ctx = video_drvdata(file);
const struct cal_format_info *fmtinfo;
if (vb2_is_busy(&ctx->vb_vidq)) {
ctx_dbg(3, ctx, "%s device busy\n", __func__);
return -EBUSY;
}
cal_mc_try_fmt(ctx, f, &fmtinfo);
ctx->v_fmt = *f;
ctx->fmtinfo = fmtinfo;
return 0;
}
static int cal_mc_enum_framesizes(struct file *file, void *fh,
struct v4l2_frmsizeenum *fsize)
{
struct cal_ctx *ctx = video_drvdata(file);
const struct cal_format_info *fmtinfo;
unsigned int bpp;
if (fsize->index > 0)
return -EINVAL;
fmtinfo = cal_format_by_fourcc(fsize->pixel_format);
if (!fmtinfo) {
ctx_dbg(3, ctx, "Invalid pixel format 0x%08x\n",
fsize->pixel_format);
return -EINVAL;
}
bpp = ALIGN(fmtinfo->bpp, 8);
fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
fsize->stepwise.min_width = CAL_MIN_WIDTH_BYTES * 8 / bpp;
fsize->stepwise.max_width = CAL_MAX_WIDTH_BYTES * 8 / bpp;
fsize->stepwise.step_width = 64 / bpp;
fsize->stepwise.min_height = CAL_MIN_HEIGHT_LINES;
fsize->stepwise.max_height = CAL_MAX_HEIGHT_LINES;
fsize->stepwise.step_height = 1;
return 0;
}
static const struct v4l2_ioctl_ops cal_ioctl_mc_ops = {
.vidioc_querycap = cal_querycap,
.vidioc_enum_fmt_vid_cap = cal_mc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = cal_mc_try_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = cal_mc_s_fmt_vid_cap,
.vidioc_enum_framesizes = cal_mc_enum_framesizes,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_log_status = v4l2_ctrl_log_status,
};
/* ------------------------------------------------------------------
* videobuf2 Common Operations
* ------------------------------------------------------------------
*/
static int cal_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct cal_ctx *ctx = vb2_get_drv_priv(vq);
unsigned int size = ctx->v_fmt.fmt.pix.sizeimage;
unsigned int q_num_bufs = vb2_get_num_buffers(vq);
if (q_num_bufs + *nbuffers < 3)
*nbuffers = 3 - q_num_bufs;
if (*nplanes) {
if (sizes[0] < size)
return -EINVAL;
size = sizes[0];
}
*nplanes = 1;
sizes[0] = size;
ctx_dbg(3, ctx, "nbuffers=%d, size=%d\n", *nbuffers, sizes[0]);
return 0;
}
static int cal_buffer_prepare(struct vb2_buffer *vb)
{
struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
struct cal_buffer *buf = container_of(vb, struct cal_buffer,
vb.vb2_buf);
unsigned long size;
size = ctx->v_fmt.fmt.pix.sizeimage;
if (vb2_plane_size(vb, 0) < size) {
ctx_err(ctx,
"data will not fit into plane (%lu < %lu)\n",
vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
return 0;
}
static void cal_buffer_queue(struct vb2_buffer *vb)
{
struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
struct cal_buffer *buf = container_of(vb, struct cal_buffer,
vb.vb2_buf);
unsigned long flags;
/* recheck locking */
spin_lock_irqsave(&ctx->dma.lock, flags);
list_add_tail(&buf->list, &ctx->dma.queue);
spin_unlock_irqrestore(&ctx->dma.lock, flags);
}
static void cal_release_buffers(struct cal_ctx *ctx,
enum vb2_buffer_state state)
{
struct cal_buffer *buf, *tmp;
/* Release all queued buffers. */
spin_lock_irq(&ctx->dma.lock);
list_for_each_entry_safe(buf, tmp, &ctx->dma.queue, list) {
list_del(&buf->list);
vb2_buffer_done(&buf->vb.vb2_buf, state);
}
if (ctx->dma.pending) {
vb2_buffer_done(&ctx->dma.pending->vb.vb2_buf, state);
ctx->dma.pending = NULL;
}
if (ctx->dma.active) {
vb2_buffer_done(&ctx->dma.active->vb.vb2_buf, state);
ctx->dma.active = NULL;
}
spin_unlock_irq(&ctx->dma.lock);
}
/* ------------------------------------------------------------------
* videobuf2 Operations
* ------------------------------------------------------------------
*/
static int cal_video_check_format(struct cal_ctx *ctx)
{
const struct v4l2_mbus_framefmt *format;
struct v4l2_subdev_state *state;
struct media_pad *remote_pad;
int ret = 0;
remote_pad = media_pad_remote_pad_first(&ctx->pad);
if (!remote_pad)
return -ENODEV;
state = v4l2_subdev_lock_and_get_active_state(&ctx->phy->subdev);
format = v4l2_subdev_state_get_format(state, remote_pad->index);
if (!format) {
ret = -EINVAL;
goto out;
}
if (ctx->fmtinfo->code != format->code ||
ctx->v_fmt.fmt.pix.height != format->height ||
ctx->v_fmt.fmt.pix.width != format->width ||
ctx->v_fmt.fmt.pix.field != format->field) {
ret = -EPIPE;
goto out;
}
out:
v4l2_subdev_unlock_state(state);
return ret;
}
static int cal_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct cal_ctx *ctx = vb2_get_drv_priv(vq);
struct cal_buffer *buf;
dma_addr_t addr;
int ret;
ret = video_device_pipeline_alloc_start(&ctx->vdev);
if (ret < 0) {
ctx_err(ctx, "Failed to start media pipeline: %d\n", ret);
goto error_release_buffers;
}
/*
* Verify that the currently configured format matches the output of
* the connected CAMERARX.
*/
ret = cal_video_check_format(ctx);
if (ret < 0) {
ctx_dbg(3, ctx,
"Format mismatch between CAMERARX and video node\n");
goto error_pipeline;
}
ret = cal_ctx_prepare(ctx);
if (ret) {
ctx_err(ctx, "Failed to prepare context: %d\n", ret);
goto error_pipeline;
}
spin_lock_irq(&ctx->dma.lock);
buf = list_first_entry(&ctx->dma.queue, struct cal_buffer, list);
ctx->dma.active = buf;
list_del(&buf->list);
spin_unlock_irq(&ctx->dma.lock);
addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
ret = pm_runtime_resume_and_get(ctx->cal->dev);
if (ret < 0)
goto error_pipeline;
cal_ctx_set_dma_addr(ctx, addr);
cal_ctx_start(ctx);
ret = v4l2_subdev_call(&ctx->phy->subdev, video, s_stream, 1);
if (ret)
goto error_stop;
if (cal_debug >= 4)
cal_quickdump_regs(ctx->cal);
return 0;
error_stop:
cal_ctx_stop(ctx);
pm_runtime_put_sync(ctx->cal->dev);
cal_ctx_unprepare(ctx);
error_pipeline:
video_device_pipeline_stop(&ctx->vdev);
error_release_buffers:
cal_release_buffers(ctx, VB2_BUF_STATE_QUEUED);
return ret;
}
static void cal_stop_streaming(struct vb2_queue *vq)
{
struct cal_ctx *ctx = vb2_get_drv_priv(vq);
cal_ctx_stop(ctx);
v4l2_subdev_call(&ctx->phy->subdev, video, s_stream, 0);
pm_runtime_put_sync(ctx->cal->dev);
cal_ctx_unprepare(ctx);
cal_release_buffers(ctx, VB2_BUF_STATE_ERROR);
video_device_pipeline_stop(&ctx->vdev);
}
static const struct vb2_ops cal_video_qops = {
.queue_setup = cal_queue_setup,
.buf_prepare = cal_buffer_prepare,
.buf_queue = cal_buffer_queue,
.start_streaming = cal_start_streaming,
.stop_streaming = cal_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
/* ------------------------------------------------------------------
* V4L2 Initialization and Registration
* ------------------------------------------------------------------
*/
static const struct v4l2_file_operations cal_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = vb2_fop_release,
.poll = vb2_fop_poll,
.unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
.mmap = vb2_fop_mmap,
};
static int cal_ctx_v4l2_init_formats(struct cal_ctx *ctx)
{
struct v4l2_mbus_framefmt mbus_fmt;
const struct cal_format_info *fmtinfo;
unsigned int i, j, k;
int ret = 0;
/* Enumerate sub device formats and enable all matching local formats */
ctx->active_fmt = devm_kcalloc(ctx->cal->dev, cal_num_formats,
sizeof(*ctx->active_fmt), GFP_KERNEL);
if (!ctx->active_fmt)
return -ENOMEM;
ctx->num_active_fmt = 0;
for (j = 0, i = 0; ; ++j) {
struct v4l2_subdev_mbus_code_enum mbus_code = {
.index = j,
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
ret = v4l2_subdev_call(ctx->phy->source, pad, enum_mbus_code,
NULL, &mbus_code);
if (ret == -EINVAL)
break;
if (ret) {
ctx_err(ctx, "Error enumerating mbus codes in subdev %s: %d\n",
ctx->phy->source->name, ret);
return ret;
}
ctx_dbg(2, ctx,
"subdev %s: code: %04x idx: %u\n",
ctx->phy->source->name, mbus_code.code, j);
for (k = 0; k < cal_num_formats; k++) {
fmtinfo = &cal_formats[k];
if (mbus_code.code == fmtinfo->code) {
ctx->active_fmt[i] = fmtinfo;
ctx_dbg(2, ctx,
"matched fourcc: %s: code: %04x idx: %u\n",
fourcc_to_str(fmtinfo->fourcc),
fmtinfo->code, i);
ctx->num_active_fmt = ++i;
}
}
}
if (i == 0) {
ctx_err(ctx, "No suitable format reported by subdev %s\n",
ctx->phy->source->name);
return -EINVAL;
}
ret = __subdev_get_format(ctx, &mbus_fmt);
if (ret)
return ret;
fmtinfo = find_format_by_code(ctx, mbus_fmt.code);
if (!fmtinfo) {
ctx_dbg(3, ctx, "mbus code format (0x%08x) not found.\n",
mbus_fmt.code);
return -EINVAL;
}
/* Save current format */
v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &mbus_fmt);
ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ctx->v_fmt.fmt.pix.pixelformat = fmtinfo->fourcc;
cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt);
ctx->fmtinfo = fmtinfo;
return 0;
}
static int cal_ctx_v4l2_init_mc_format(struct cal_ctx *ctx)
{
const struct cal_format_info *fmtinfo;
struct v4l2_pix_format *pix_fmt = &ctx->v_fmt.fmt.pix;
fmtinfo = cal_format_by_code(MEDIA_BUS_FMT_UYVY8_1X16);
if (!fmtinfo)
return -EINVAL;
pix_fmt->width = 640;
pix_fmt->height = 480;
pix_fmt->field = V4L2_FIELD_NONE;
pix_fmt->colorspace = V4L2_COLORSPACE_SRGB;
pix_fmt->ycbcr_enc = V4L2_YCBCR_ENC_601;
pix_fmt->quantization = V4L2_QUANTIZATION_LIM_RANGE;
pix_fmt->xfer_func = V4L2_XFER_FUNC_SRGB;
pix_fmt->pixelformat = fmtinfo->fourcc;
ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
/* Save current format */
cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt);
ctx->fmtinfo = fmtinfo;
return 0;
}
int cal_ctx_v4l2_register(struct cal_ctx *ctx)
{
struct video_device *vfd = &ctx->vdev;
int ret;
if (!cal_mc_api) {
struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler;
ret = cal_ctx_v4l2_init_formats(ctx);
if (ret) {
ctx_err(ctx, "Failed to init formats: %d\n", ret);
return ret;
}
ret = v4l2_ctrl_add_handler(hdl, ctx->phy->source->ctrl_handler,
NULL, true);
if (ret < 0) {
ctx_err(ctx, "Failed to add source ctrl handler\n");
return ret;
}
} else {
ret = cal_ctx_v4l2_init_mc_format(ctx);
if (ret) {
ctx_err(ctx, "Failed to init format: %d\n", ret);
return ret;
}
}
ret = video_register_device(vfd, VFL_TYPE_VIDEO, cal_video_nr);
if (ret < 0) {
ctx_err(ctx, "Failed to register video device\n");
return ret;
}
ret = media_create_pad_link(&ctx->phy->subdev.entity,
CAL_CAMERARX_PAD_FIRST_SOURCE,
&vfd->entity, 0,
MEDIA_LNK_FL_IMMUTABLE |
MEDIA_LNK_FL_ENABLED);
if (ret) {
ctx_err(ctx, "Failed to create media link for context %u\n",
ctx->dma_ctx);
video_unregister_device(vfd);
return ret;
}
ctx_info(ctx, "V4L2 device registered as %s\n",
video_device_node_name(vfd));
return 0;
}
void cal_ctx_v4l2_unregister(struct cal_ctx *ctx)
{
ctx_dbg(1, ctx, "unregistering %s\n",
video_device_node_name(&ctx->vdev));
video_unregister_device(&ctx->vdev);
}
int cal_ctx_v4l2_init(struct cal_ctx *ctx)
{
struct video_device *vfd = &ctx->vdev;
struct vb2_queue *q = &ctx->vb_vidq;
int ret;
INIT_LIST_HEAD(&ctx->dma.queue);
spin_lock_init(&ctx->dma.lock);
mutex_init(&ctx->mutex);
init_waitqueue_head(&ctx->dma.wait);
/* Initialize the vb2 queue. */
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
q->io_modes = VB2_MMAP | VB2_DMABUF;
q->drv_priv = ctx;
q->buf_struct_size = sizeof(struct cal_buffer);
q->ops = &cal_video_qops;
q->mem_ops = &vb2_dma_contig_memops;
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->lock = &ctx->mutex;
q->min_queued_buffers = 3;
q->dev = ctx->cal->dev;
ret = vb2_queue_init(q);
if (ret)
return ret;
/* Initialize the video device and media entity. */
vfd->fops = &cal_fops;
vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING
| (cal_mc_api ? V4L2_CAP_IO_MC : 0);
vfd->v4l2_dev = &ctx->cal->v4l2_dev;
vfd->queue = q;
snprintf(vfd->name, sizeof(vfd->name), "CAL output %u", ctx->dma_ctx);
vfd->release = video_device_release_empty;
vfd->ioctl_ops = cal_mc_api ? &cal_ioctl_mc_ops : &cal_ioctl_legacy_ops;
vfd->lock = &ctx->mutex;
video_set_drvdata(vfd, ctx);
ctx->pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_pads_init(&vfd->entity, 1, &ctx->pad);
if (ret < 0)
return ret;
if (!cal_mc_api) {
/* Initialize the control handler. */
struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler;
ret = v4l2_ctrl_handler_init(hdl, 11);
if (ret < 0) {
ctx_err(ctx, "Failed to init ctrl handler\n");
goto error;
}
vfd->ctrl_handler = hdl;
}
return 0;
error:
media_entity_cleanup(&vfd->entity);
return ret;
}
void cal_ctx_v4l2_cleanup(struct cal_ctx *ctx)
{
if (!cal_mc_api)
v4l2_ctrl_handler_free(&ctx->ctrl_handler);
media_entity_cleanup(&ctx->vdev.entity);
}
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