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Message-ID: <20201002194935.GB1131147@chromium.org>
Date: Fri, 2 Oct 2020 19:49:35 +0000
From: Tomasz Figa <tfiga@...omium.org>
To: Helen Koike <helen.koike@...labora.com>
Cc: mchehab@...nel.org, hans.verkuil@...co.com,
laurent.pinchart@...asonboard.com, sakari.ailus@....fi,
linux-media@...r.kernel.org,
Boris Brezillon <boris.brezillon@...labora.com>,
hiroh@...omium.org, nicolas@...fresne.ca, Brian.Starkey@....com,
kernel@...labora.com, narmstrong@...libre.com,
linux-kernel@...r.kernel.org, frkoenig@...omium.org,
mjourdan@...libre.com, stanimir.varbanov@...aro.org
Subject: Re: [PATCH v5 1/7] media: v4l2: Extend pixel formats to unify
single/multi-planar handling (and more)
Hi Helen,
On Tue, Aug 04, 2020 at 04:29:33PM -0300, Helen Koike wrote:
> This is part of the multiplanar and singleplanar unification process.
> v4l2_ext_pix_format is supposed to work for both cases.
>
> We also add the concept of modifiers already employed in DRM to expose
> HW-specific formats (like tiled or compressed formats) and allow
> exchanging this information with the DRM subsystem in a consistent way.
>
> Note that only V4L2_BUF_TYPE_VIDEO_[OUTPUT,CAPTURE] are accepted in
> v4l2_ext_format, other types will be rejected if you use the
> {G,S,TRY}_EXT_PIX_FMT ioctls.
>
> New hooks have been added to v4l2_ioctl_ops to support those new ioctls
> in drivers, but, in the meantime, the core takes care of converting
> {S,G,TRY}_EXT_PIX_FMT requests into {S,G,TRY}_FMT so that old drivers can
> still work if the userspace app/lib uses the new ioctls.
> The conversion is also done the other around to allow userspace
> apps/libs using {S,G,TRY}_FMT to work with drivers implementing the
> _ext_ hooks.
>
Thank you for the patch. Please see my comments inline.
> Signed-off-by: Boris Brezillon <boris.brezillon@...labora.com>
> Signed-off-by: Helen Koike <helen.koike@...labora.com>
> ---
> Changes in v5:
> - change sizes and reorder fields to avoid holes in the struct and make
> it the same for 32 and 64 bits
> - removed __attribute__ ((packed)) from uapi structs
> - Fix doc warning from make htmldocs
> - Updated commit message with EXT_PIX prefix for the ioctls.
>
> Changes in v4:
> - Use v4l2_ext_pix_format directly in the ioctl, drop v4l2_ext_format,
> making V4L2_BUF_TYPE_VIDEO_[OUTPUT,CAPTURE] the only valid types.
> - Add reserved fields
> - Removed num_planes from struct v4l2_ext_pix_format
> - Removed flag field from struct v4l2_ext_pix_format, since the only
> defined value is V4L2_PIX_FMT_FLAG_PREMUL_ALPHA only used by vsp1,
> where we can use modifiers, or add it back later through the reserved
> bits.
> - In v4l2_ext_format_to_format(), check if modifier is != MOD_LINEAR &&
> != MOD_INVALID
> - Fix type assignment in v4l_g_fmt_ext_pix()
> - Rebased on top of media/master (post 5.8-rc1)
>
> Changes in v3:
> - Rebased on top of media/master (post 5.4-rc1)
>
> Changes in v2:
> - Move the modifier in v4l2_ext_format (was formerly placed in
> v4l2_ext_plane)
> - Fix a few bugs in the converters and add a strict parameter to
> allow conversion of uninitialized/mis-initialized objects
> ---
> drivers/media/v4l2-core/v4l2-dev.c | 21 +-
> drivers/media/v4l2-core/v4l2-ioctl.c | 585 +++++++++++++++++++++++----
> include/media/v4l2-ioctl.h | 34 ++
> include/uapi/linux/videodev2.h | 56 +++
> 4 files changed, 615 insertions(+), 81 deletions(-)
>
> diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c
> index a593ea0598b55..e1829906bc086 100644
> --- a/drivers/media/v4l2-core/v4l2-dev.c
> +++ b/drivers/media/v4l2-core/v4l2-dev.c
> @@ -607,25 +607,37 @@ static void determine_valid_ioctls(struct video_device *vdev)
> set_bit(_IOC_NR(VIDIOC_ENUM_FMT), valid_ioctls);
> if ((is_rx && (ops->vidioc_g_fmt_vid_cap ||
> ops->vidioc_g_fmt_vid_cap_mplane ||
> + ops->vidioc_g_ext_pix_fmt_vid_cap ||
> ops->vidioc_g_fmt_vid_overlay)) ||
> (is_tx && (ops->vidioc_g_fmt_vid_out ||
> ops->vidioc_g_fmt_vid_out_mplane ||
> - ops->vidioc_g_fmt_vid_out_overlay)))
> + ops->vidioc_g_ext_pix_fmt_vid_out ||
> + ops->vidioc_g_fmt_vid_out_overlay))) {
> set_bit(_IOC_NR(VIDIOC_G_FMT), valid_ioctls);
> + set_bit(_IOC_NR(VIDIOC_G_EXT_PIX_FMT), valid_ioctls);
Is it expected to allow the new ioctls for drivers which implement the old
vid_out_overlay callbacks?
> + }
> if ((is_rx && (ops->vidioc_s_fmt_vid_cap ||
> ops->vidioc_s_fmt_vid_cap_mplane ||
> + ops->vidioc_s_ext_pix_fmt_vid_cap ||
> ops->vidioc_s_fmt_vid_overlay)) ||
> (is_tx && (ops->vidioc_s_fmt_vid_out ||
> ops->vidioc_s_fmt_vid_out_mplane ||
> - ops->vidioc_s_fmt_vid_out_overlay)))
> + ops->vidioc_s_ext_pix_fmt_vid_out ||
> + ops->vidioc_s_fmt_vid_out_overlay))) {
> set_bit(_IOC_NR(VIDIOC_S_FMT), valid_ioctls);
> + set_bit(_IOC_NR(VIDIOC_S_EXT_PIX_FMT), valid_ioctls);
> + }
> if ((is_rx && (ops->vidioc_try_fmt_vid_cap ||
> ops->vidioc_try_fmt_vid_cap_mplane ||
> + ops->vidioc_try_ext_pix_fmt_vid_cap ||
> ops->vidioc_try_fmt_vid_overlay)) ||
> (is_tx && (ops->vidioc_try_fmt_vid_out ||
> ops->vidioc_try_fmt_vid_out_mplane ||
> - ops->vidioc_try_fmt_vid_out_overlay)))
> + ops->vidioc_try_ext_pix_fmt_vid_out ||
> + ops->vidioc_try_fmt_vid_out_overlay))) {
> set_bit(_IOC_NR(VIDIOC_TRY_FMT), valid_ioctls);
> + set_bit(_IOC_NR(VIDIOC_TRY_EXT_PIX_FMT), valid_ioctls);
> + }
> SET_VALID_IOCTL(ops, VIDIOC_OVERLAY, vidioc_overlay);
> SET_VALID_IOCTL(ops, VIDIOC_G_FBUF, vidioc_g_fbuf);
> SET_VALID_IOCTL(ops, VIDIOC_S_FBUF, vidioc_s_fbuf);
> @@ -682,8 +694,11 @@ static void determine_valid_ioctls(struct video_device *vdev)
> /* touch specific ioctls */
> SET_VALID_IOCTL(ops, VIDIOC_ENUM_FMT, vidioc_enum_fmt_vid_cap);
> SET_VALID_IOCTL(ops, VIDIOC_G_FMT, vidioc_g_fmt_vid_cap);
> + SET_VALID_IOCTL(ops, VIDIOC_G_EXT_PIX_FMT, vidioc_g_fmt_vid_cap);
> SET_VALID_IOCTL(ops, VIDIOC_S_FMT, vidioc_s_fmt_vid_cap);
> + SET_VALID_IOCTL(ops, VIDIOC_S_EXT_PIX_FMT, vidioc_s_fmt_vid_cap);
> SET_VALID_IOCTL(ops, VIDIOC_TRY_FMT, vidioc_try_fmt_vid_cap);
> + SET_VALID_IOCTL(ops, VIDIOC_TRY_EXT_PIX_FMT, vidioc_try_fmt_vid_cap);
> SET_VALID_IOCTL(ops, VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes);
> SET_VALID_IOCTL(ops, VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals);
> SET_VALID_IOCTL(ops, VIDIOC_ENUMINPUT, vidioc_enum_input);
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> index a556880f225a5..14a0def50f8ea 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -17,6 +17,8 @@
>
> #include <linux/videodev2.h>
>
> +#include <drm/drm_fourcc.h>
> +
> #include <media/v4l2-common.h>
> #include <media/v4l2-ioctl.h>
> #include <media/v4l2-ctrls.h>
> @@ -378,6 +380,27 @@ static void v4l_print_format(const void *arg, bool write_only)
> }
> }
>
> +static void v4l_print_ext_pix_format(const void *arg, bool write_only)
> +{
> + const struct v4l2_ext_pix_format *pix = arg;
> + unsigned int i;
> +
> + pr_cont("type=%s, width=%u, height=%u, format=%c%c%c%c, modifier %llx, field=%s, colorspace=%d, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
> + prt_names(pix->type, v4l2_type_names),
> + pix->width, pix->height,
> + (pix->pixelformat & 0xff),
> + (pix->pixelformat >> 8) & 0xff,
> + (pix->pixelformat >> 16) & 0xff,
> + (pix->pixelformat >> 24) & 0xff,
> + pix->modifier, prt_names(pix->field, v4l2_field_names),
> + pix->colorspace, pix->ycbcr_enc,
> + pix->quantization, pix->xfer_func);
> + for (i = 0; i < VIDEO_MAX_PLANES && pix->plane_fmt[i].sizeimage; i++)
This is going to print 8 lines every time. Maybe we could skip 0-sized
planes or something?
> + pr_debug("plane %u: bytesperline=%u sizeimage=%u\n",
> + i, pix->plane_fmt[i].bytesperline,
> + pix->plane_fmt[i].sizeimage);
> +}
> +
> static void v4l_print_framebuffer(const void *arg, bool write_only)
> {
> const struct v4l2_framebuffer *p = arg;
> @@ -964,11 +987,15 @@ static int check_fmt(struct file *file, enum v4l2_buf_type type)
> switch (type) {
> case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> if ((is_vid || is_tch) && is_rx &&
> - (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
> + (ops->vidioc_g_fmt_vid_cap ||
> + ops->vidioc_g_ext_pix_fmt_vid_cap ||
> + ops->vidioc_g_fmt_vid_cap_mplane))
> return 0;
> break;
> case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> - if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
> + if ((is_vid || is_tch) && is_rx &&
> + (ops->vidioc_g_fmt_vid_cap_mplane ||
> + ops->vidioc_g_ext_pix_fmt_vid_cap))
> return 0;
> break;
> case V4L2_BUF_TYPE_VIDEO_OVERLAY:
> @@ -977,11 +1004,15 @@ static int check_fmt(struct file *file, enum v4l2_buf_type type)
> break;
> case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> if (is_vid && is_tx &&
> - (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
> + (ops->vidioc_g_fmt_vid_out ||
> + ops->vidioc_g_ext_pix_fmt_vid_out ||
> + ops->vidioc_g_fmt_vid_out_mplane))
> return 0;
> break;
> case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> - if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
> + if (is_vid && is_tx &&
> + (ops->vidioc_g_ext_pix_fmt_vid_out ||
> + ops->vidioc_g_fmt_vid_out_mplane))
> return 0;
> break;
> case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
> @@ -1061,6 +1092,134 @@ static void v4l_sanitize_format(struct v4l2_format *fmt)
> sizeof(fmt->fmt.pix) - offset);
> }
>
> +int v4l2_ext_pix_format_to_format(const struct v4l2_ext_pix_format *e,
> + struct v4l2_format *f, bool mplane_cap,
> + bool strict)
> +{
> + const struct v4l2_plane_ext_pix_format *pe;
> + struct v4l2_plane_pix_format *p;
> + unsigned int i;
> +
> + memset(f, 0, sizeof(*f));
> +
> + /*
> + * Make sure no modifier is required before doing the
> + * conversion.
> + */
> + if (e->modifier && strict &&
Do we need the explicit check for e->modifier != 0 if we have to check for
the 2 specific values below anyway?
> + e->modifier != DRM_FORMAT_MOD_LINEAR &&
> + e->modifier != DRM_FORMAT_MOD_INVALID)
> + return -EINVAL;
> +
> + if (!e->plane_fmt[0].sizeimage && strict)
> + return -EINVAL;
Why is this incorrect?
> +
> + if (e->plane_fmt[1].sizeimage && !mplane_cap && strict)
> + return 0;
Again this seems to be different from what we discussed before. In the ext
API, the planes would mean color planes and would be all filled in with the
right values. So for this conversion, if !mplane cap, then we should check
if bytesperline of planes >= 1 match the format definition and use the sum
of all planes sizeimage as the sizeimage of the legacy struct.
> +
> + if (!mplane_cap) {
> + f->fmt.pix.width = e->width;
> + f->fmt.pix.height = e->height;
> + f->fmt.pix.pixelformat = e->pixelformat;
> + f->fmt.pix.field = e->field;
> + f->fmt.pix.colorspace = e->colorspace;
> + f->fmt.pix.ycbcr_enc = e->ycbcr_enc;
> + f->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> + f->fmt.pix.quantization = e->quantization;
> + pe = &e->plane_fmt[0];
> + f->fmt.pix.bytesperline = pe->bytesperline;
> + f->fmt.pix.sizeimage = pe->sizeimage;
See above for how these two should be filled in.
> + f->type = e->type;
> + return 0;
> + }
> +
> + f->fmt.pix_mp.width = e->width;
> + f->fmt.pix_mp.height = e->height;
> + f->fmt.pix_mp.pixelformat = e->pixelformat;
> + f->fmt.pix_mp.field = e->field;
> + f->fmt.pix_mp.colorspace = e->colorspace;
> + f->fmt.pix_mp.ycbcr_enc = e->ycbcr_enc;
> + f->fmt.pix_mp.quantization = e->quantization;
> + if (e->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
> + f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
> + else
> + f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
> +
> + for (i = 0; i < VIDEO_MAX_PLANES; i++) {
> + pe = &e->plane_fmt[i];
> + p = &f->fmt.pix_mp.plane_fmt[i];
> + p->bytesperline = pe->bytesperline;
> + p->sizeimage = pe->sizeimage;
This is similar to the above, but the behavior depends on whether the
pixelformat is an M or non-M variant.
> + }
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(v4l2_ext_pix_format_to_format);
> +
> +int v4l2_format_to_ext_pix_format(const struct v4l2_format *f,
> + struct v4l2_ext_pix_format *e, bool strict)
In other functions "ef" is used for the extended format. Let's make it
consistent.
> +{
> + const struct v4l2_plane_pix_format *p;
> + struct v4l2_plane_ext_pix_format *pe;
> + unsigned int i;
> +
> + memset(e, 0, sizeof(*e));
> +
> + switch (f->type) {
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + e->width = f->fmt.pix.width;
> + e->height = f->fmt.pix.height;
> + e->pixelformat = f->fmt.pix.pixelformat;
> + e->field = f->fmt.pix.field;
> + e->colorspace = f->fmt.pix.colorspace;
> + if (f->fmt.pix.flags)
> + pr_warn("Ignoring pixelformat flags 0x%x\n",
> + f->fmt.pix.flags);
Would it make sense to print something like video node name and/or function
name to explain where this warning comes from?
> + e->ycbcr_enc = f->fmt.pix.ycbcr_enc;
> + e->quantization = f->fmt.pix.quantization;
Missing xfer_func?
> + e->plane_fmt[0].bytesperline = f->fmt.pix.bytesperline;
> + e->plane_fmt[0].sizeimage = f->fmt.pix.sizeimage;
This doesn't look right. In the ext API we expected the planes to describe
color planes, which means that bytesperline needs to be computed for planes
>= 1 and sizeimage replaced with per-plane sizes, according to the
>pixelformat.
> + e->type = f->type;
> + break;
> +
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> + if ((f->fmt.pix_mp.num_planes > VIDEO_MAX_PLANES ||
> + !f->fmt.pix_mp.num_planes) && strict)
> + return -EINVAL;
> +
> + e->width = f->fmt.pix_mp.width;
> + e->height = f->fmt.pix_mp.height;
> + e->pixelformat = f->fmt.pix_mp.pixelformat;
> + e->field = f->fmt.pix_mp.field;
> + e->colorspace = f->fmt.pix_mp.colorspace;
> + if (f->fmt.pix.flags)
> + pr_warn("Ignoring pixelformat flags 0x%x\n",
> + f->fmt.pix.flags);
> + e->ycbcr_enc = f->fmt.pix_mp.ycbcr_enc;
> + e->quantization = f->fmt.pix_mp.quantization;
Missing xfer_func?
> + if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
> + e->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> + else
> + e->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
> +
> + for (i = 0; i < VIDEO_MAX_PLANES; i++) {
> + pe = &e->plane_fmt[i];
> + p = &f->fmt.pix_mp.plane_fmt[i];
> + pe->bytesperline = p->bytesperline;
> + pe->sizeimage = p->sizeimage;
> + }
Same here. A blind copy is not enough. For non-M formats, the plane
parameters need to be filled according to the pixelformat.
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(v4l2_format_to_ext_pix_format);
> +
> static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
> struct file *file, void *fh, void *arg)
> {
> @@ -1564,6 +1723,38 @@ static void v4l_pix_format_touch(struct v4l2_pix_format *p)
> p->xfer_func = 0;
> }
>
> +static int v4l_g_fmt_ext_pix(const struct v4l2_ioctl_ops *ops,
> + struct file *file, void *fh,
> + struct v4l2_format *f)
> +{
> + struct v4l2_ext_pix_format ef;
> + int ret;
> +
> + switch (f->type) {
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> + ef.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> + ret = ops->vidioc_g_ext_pix_fmt_vid_cap(file, fh, &ef);
> + break;
> +
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> + ef.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
> + ret = ops->vidioc_g_ext_pix_fmt_vid_out(file, fh, &ef);
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> +
> + if (ret)
> + return ret;
> +
> + return v4l2_ext_pix_format_to_format(&ef, f,
> + V4L2_TYPE_IS_MULTIPLANAR(f->type),
> + true);
> +}
> +
> static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
> struct file *file, void *fh, void *arg)
> {
> @@ -1600,17 +1791,27 @@ static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
>
> switch (p->type) {
> case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> - if (unlikely(!ops->vidioc_g_fmt_vid_cap))
> - break;
> - p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> - ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
> - /* just in case the driver zeroed it again */
> - p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> - if (vfd->vfl_type == VFL_TYPE_TOUCH)
> - v4l_pix_format_touch(&p->fmt.pix);
> - return ret;
> + if (ops->vidioc_g_fmt_vid_cap) {
> + p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> + ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
> + /* just in case the driver zeroed it again */
> + p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> + if (vfd->vfl_type == VFL_TYPE_TOUCH)
> + v4l_pix_format_touch(&p->fmt.pix);
> + return ret;
> + } else if (ops->vidioc_g_ext_pix_fmt_vid_cap) {
> + ret = v4l_g_fmt_ext_pix(ops, file, fh, p);
> + if (vfd->vfl_type == VFL_TYPE_TOUCH)
> + v4l_pix_format_touch(&p->fmt.pix);
> + return ret;
> + }
> + break;
> case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> - return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
> + if (ops->vidioc_g_fmt_vid_cap_mplane)
> + return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
> + else if (ops->vidioc_g_ext_pix_fmt_vid_cap)
> + return v4l_g_fmt_ext_pix(ops, file, fh, p);
> + break;
> case V4L2_BUF_TYPE_VIDEO_OVERLAY:
> return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
> case V4L2_BUF_TYPE_VBI_CAPTURE:
> @@ -1618,15 +1819,22 @@ static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
> case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
> return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
> case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> - if (unlikely(!ops->vidioc_g_fmt_vid_out))
> - break;
> - p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> - ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
> - /* just in case the driver zeroed it again */
> - p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> - return ret;
> + if (ops->vidioc_g_fmt_vid_out) {
> + p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> + ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
> + /* just in case the driver zeroed it again */
> + p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> + return ret;
> + } else if (ops->vidioc_g_ext_pix_fmt_vid_out) {
> + return v4l_g_fmt_ext_pix(ops, file, fh, p);
> + }
> + break;
> case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> - return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
> + if (ops->vidioc_g_fmt_vid_out_mplane)
> + return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
> + else if (ops->vidioc_g_ext_pix_fmt_vid_out)
> + return v4l_g_fmt_ext_pix(ops, file, fh, p);
> + break;
> case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
> return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
> case V4L2_BUF_TYPE_VBI_OUTPUT:
> @@ -1645,6 +1853,76 @@ static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
> return -EINVAL;
> }
>
> +static int v4l_g_ext_pix_fmt(const struct v4l2_ioctl_ops *ops,
> + struct file *file, void *fh, void *arg)
> +{
> + struct v4l2_ext_pix_format *ef = arg;
> + struct v4l2_format f = {
> + .type = ef->type,
> + };
> + int ret;
> +
> + ret = check_fmt(file, ef->type);
> + if (ret)
> + return ret;
> +
> + memset(ef, 0, sizeof(*ef));
> + ef->type = f.type;
> +
> + switch (f.type) {
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + if (ops->vidioc_g_ext_pix_fmt_vid_cap)
> + return ops->vidioc_g_ext_pix_fmt_vid_cap(file, fh, ef);
> + break;
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + if (ops->vidioc_g_ext_pix_fmt_vid_out)
> + return ops->vidioc_g_ext_pix_fmt_vid_out(file, fh, ef);
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + ret = v4l_g_fmt(ops, file, fh, &f);
> + if (ret)
> + return ret;
> +
> + return v4l2_format_to_ext_pix_format(&f, ef, true);
> +}
> +
> +static int v4l_s_fmt_ext_pix(const struct v4l2_ioctl_ops *ops,
> + struct file *file, void *fh,
> + struct v4l2_format *f)
> +{
> + struct v4l2_ext_pix_format ef;
> + int ret;
> +
> + ret = v4l2_format_to_ext_pix_format(f, &ef, false);
> + if (ret)
> + return ret;
> +
> + switch (f->type) {
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> + ret = ops->vidioc_s_ext_pix_fmt_vid_cap(file, fh, &ef);
> + break;
> +
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> + ret = ops->vidioc_s_ext_pix_fmt_vid_out(file, fh, &ef);
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> +
> + if (ret)
> + return ret;
> +
> + return v4l2_ext_pix_format_to_format(&ef, f,
> + V4L2_TYPE_IS_MULTIPLANAR(f->type),
> + true);
> +}
> +
> static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
> struct file *file, void *fh, void *arg)
> {
> @@ -1663,23 +1941,31 @@ static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
>
> switch (p->type) {
> case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> - if (unlikely(!ops->vidioc_s_fmt_vid_cap))
> + if (ops->vidioc_s_fmt_vid_cap) {
> + CLEAR_AFTER_FIELD(p, fmt.pix);
> + ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
> + /* just in case the driver zeroed it again */
> + p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> + } else if (ops->vidioc_s_ext_pix_fmt_vid_cap) {
> + ret = v4l_s_fmt_ext_pix(ops, file, fh, arg);
> + } else {
> break;
> - CLEAR_AFTER_FIELD(p, fmt.pix);
> - ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
> - /* just in case the driver zeroed it again */
> - p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> + }
> +
> if (vfd->vfl_type == VFL_TYPE_TOUCH)
> v4l_pix_format_touch(&p->fmt.pix);
> return ret;
> case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> - if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
> - break;
> - CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
> - for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
> - CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
> - bytesperline);
> - return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
> + if (ops->vidioc_s_fmt_vid_cap_mplane) {
> + CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
> + for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
> + CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
> + bytesperline);
> + return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
> + } else if (ops->vidioc_s_ext_pix_fmt_vid_cap) {
> + return v4l_s_fmt_ext_pix(ops, file, fh, arg);
> + }
> + break;
> case V4L2_BUF_TYPE_VIDEO_OVERLAY:
> if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
> break;
> @@ -1696,21 +1982,27 @@ static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
> CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
> return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
> case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> - if (unlikely(!ops->vidioc_s_fmt_vid_out))
> - break;
> - CLEAR_AFTER_FIELD(p, fmt.pix);
> - ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
> - /* just in case the driver zeroed it again */
> - p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> - return ret;
> + if (ops->vidioc_s_fmt_vid_out) {
> + CLEAR_AFTER_FIELD(p, fmt.pix);
> + ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
> + /* just in case the driver zeroed it again */
> + p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> + return ret;
> + } else if (ops->vidioc_s_ext_pix_fmt_vid_out) {
> + return v4l_s_fmt_ext_pix(ops, file, fh, arg);
> + }
> + break;
> case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> - if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
> - break;
> - CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
> - for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
> - CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
> - bytesperline);
> - return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
> + if (ops->vidioc_s_fmt_vid_out_mplane) {
> + CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
> + for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
> + CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
> + bytesperline);
> + return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
> + } else if (ops->vidioc_s_ext_pix_fmt_vid_out) {
> + return v4l_s_fmt_ext_pix(ops, file, fh, arg);
> + }
> + break;
> case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
> if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
> break;
> @@ -1750,6 +2042,82 @@ static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
> return -EINVAL;
> }
>
> +static int v4l_s_ext_pix_fmt(const struct v4l2_ioctl_ops *ops,
> + struct file *file, void *fh, void *arg)
> +{
> + struct video_device *vfd = video_devdata(file);
> + struct v4l2_ext_pix_format *ef = arg;
> + struct v4l2_format f;
> + int ret;
> +
> + ret = check_fmt(file, ef->type);
> + if (ret)
> + return ret;
> +
Should we zero the reserved fields as it's done with the current structs?
> + switch (ef->type) {
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + if (ops->vidioc_s_ext_pix_fmt_vid_cap)
> + return ops->vidioc_s_ext_pix_fmt_vid_cap(file, fh, ef);
> + break;
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + if (ops->vidioc_s_ext_pix_fmt_vid_out)
> + return ops->vidioc_s_ext_pix_fmt_vid_out(file, fh, ef);
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + ret = v4l2_ext_pix_format_to_format(ef, &f,
> + vfd->device_caps &
> + (V4L2_CAP_VIDEO_CAPTURE_MPLANE |
> + V4L2_CAP_VIDEO_OUTPUT_MPLANE |
> + V4L2_CAP_VIDEO_M2M_MPLANE),
> + false);
> + if (ret)
> + return ret;
> +
> + ret = v4l_s_fmt(ops, file, fh, &f);
> + if (ret)
> + return ret;
> +
> + return v4l2_format_to_ext_pix_format(&f, ef, true);
> +}
> +
> +static int v4l_try_fmt_ext_pix(const struct v4l2_ioctl_ops *ops,
> + struct file *file, void *fh,
> + struct v4l2_format *f)
> +{
> + struct v4l2_ext_pix_format ef;
> + int ret;
> +
> + ret = v4l2_format_to_ext_pix_format(f, &ef, false);
> + if (ret)
> + return ret;
> +
> + switch (f->type) {
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> + ret = ops->vidioc_try_ext_pix_fmt_vid_cap(file, fh, &ef);
> + break;
> +
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> + ret = ops->vidioc_try_ext_pix_fmt_vid_out(file, fh, &ef);
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> +
> + if (ret)
> + return ret;
> +
> + return v4l2_ext_pix_format_to_format(&ef, f,
> + V4L2_TYPE_IS_MULTIPLANAR(f->type),
> + true);
> +}
> +
> +
> static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
> struct file *file, void *fh, void *arg)
> {
> @@ -1765,23 +2133,32 @@ static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
>
> switch (p->type) {
> case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> - if (unlikely(!ops->vidioc_try_fmt_vid_cap))
> - break;
> - CLEAR_AFTER_FIELD(p, fmt.pix);
> - ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
> - /* just in case the driver zeroed it again */
> - p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> - if (vfd->vfl_type == VFL_TYPE_TOUCH)
> - v4l_pix_format_touch(&p->fmt.pix);
> - return ret;
> + if (ops->vidioc_try_fmt_vid_cap) {
> + CLEAR_AFTER_FIELD(p, fmt.pix);
> + ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
> + /* just in case the driver zeroed it again */
> + p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> + if (vfd->vfl_type == VFL_TYPE_TOUCH)
> + v4l_pix_format_touch(&p->fmt.pix);
> + return ret;
> + } else if (ops->vidioc_try_ext_pix_fmt_vid_cap) {
> + ret = v4l_try_fmt_ext_pix(ops, file, fh, p);
> + if (vfd->vfl_type == VFL_TYPE_TOUCH)
> + v4l_pix_format_touch(&p->fmt.pix);
> + return ret;
Should the 3 lines above be outside of the if/else block?
> + }
> + break;
> case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> - if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
> - break;
> - CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
> - for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
> - CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
> - bytesperline);
> - return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
> + if (ops->vidioc_try_fmt_vid_cap_mplane) {
> + CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
> + for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
> + CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
> + bytesperline);
> + return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
> + } else if (ops->vidioc_try_ext_pix_fmt_vid_cap) {
> + return v4l_try_fmt_ext_pix(ops, file, fh, p);
> + }
> + break;
> case V4L2_BUF_TYPE_VIDEO_OVERLAY:
> if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
> break;
> @@ -1798,21 +2175,27 @@ static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
> CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
> return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
> case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> - if (unlikely(!ops->vidioc_try_fmt_vid_out))
> - break;
> - CLEAR_AFTER_FIELD(p, fmt.pix);
> - ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
> - /* just in case the driver zeroed it again */
> - p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> - return ret;
> + if (ops->vidioc_try_fmt_vid_out) {
> + CLEAR_AFTER_FIELD(p, fmt.pix);
> + ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
> + /* just in case the driver zeroed it again */
> + p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
> + return ret;
> + } else if (ops->vidioc_try_ext_pix_fmt_vid_cap) {
> + return v4l_try_fmt_ext_pix(ops, file, fh, p);
> + }
> + break;
> case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> - if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
> - break;
> - CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
> - for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
> - CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
> - bytesperline);
> - return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
> + if (ops->vidioc_try_fmt_vid_out_mplane) {
> + CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
> + for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
> + CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
> + bytesperline);
> + return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
> + } else if (ops->vidioc_try_ext_pix_fmt_vid_cap) {
> + return v4l_try_fmt_ext_pix(ops, file, fh, p);
> + }
> + break;
> case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
> if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
> break;
> @@ -1852,6 +2235,49 @@ static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
> return -EINVAL;
> }
>
> +static int v4l_try_ext_pix_fmt(const struct v4l2_ioctl_ops *ops,
> + struct file *file, void *fh, void *arg)
> +{
> + struct video_device *vfd = video_devdata(file);
> + struct v4l2_ext_pix_format *ef = arg;
> + struct v4l2_format f;
> + int ret;
> +
> + ret = check_fmt(file, ef->type);
> + if (ret)
> + return ret;
Should we zero the reserved fields as it's done with the current structs?
> +
> + switch (ef->type) {
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + if (ops->vidioc_try_ext_pix_fmt_vid_cap)
> + return ops->vidioc_try_ext_pix_fmt_vid_cap(file, fh,
> + ef);
> + break;
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + if (ops->vidioc_try_ext_pix_fmt_vid_out)
> + return ops->vidioc_try_ext_pix_fmt_vid_out(file, fh,
> + ef);
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + ret = v4l2_ext_pix_format_to_format(ef, &f,
> + vfd->device_caps &
> + (V4L2_CAP_VIDEO_CAPTURE_MPLANE |
> + V4L2_CAP_VIDEO_OUTPUT_MPLANE |
> + V4L2_CAP_VIDEO_M2M_MPLANE),
> + false);
> + if (ret)
> + return ret;
> +
> + ret = v4l_try_fmt(ops, file, fh, &f);
> + if (ret)
> + return ret;
> +
> + return v4l2_format_to_ext_pix_format(&f, ef, true);
> +}
> +
> static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
> struct file *file, void *fh, void *arg)
> {
> @@ -2771,7 +3197,9 @@ static const struct v4l2_ioctl_info v4l2_ioctls[] = {
> IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
> IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
> IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
> + IOCTL_INFO(VIDIOC_G_EXT_PIX_FMT, v4l_g_ext_pix_fmt, v4l_print_ext_pix_format, 0),
> IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
> + IOCTL_INFO(VIDIOC_S_EXT_PIX_FMT, v4l_s_ext_pix_fmt, v4l_print_ext_pix_format, INFO_FL_PRIO),
> IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
> IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
> IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
> @@ -2818,6 +3246,7 @@ static const struct v4l2_ioctl_info v4l2_ioctls[] = {
> IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
> IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
> IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
> + IOCTL_INFO(VIDIOC_TRY_EXT_PIX_FMT, v4l_try_ext_pix_fmt, v4l_print_ext_pix_format, 0),
> IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
> IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
> IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
> diff --git a/include/media/v4l2-ioctl.h b/include/media/v4l2-ioctl.h
> index 86878fba332b0..8bbcb74d8ee31 100644
> --- a/include/media/v4l2-ioctl.h
> +++ b/include/media/v4l2-ioctl.h
> @@ -48,11 +48,17 @@ struct v4l2_fh;
> * @vidioc_g_fmt_vid_cap: pointer to the function that implements
> * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video capture
> * in single plane mode
> + * @vidioc_g_ext_pix_fmt_vid_cap: pointer to the function that implements
> + * :ref:`VIDIOC_G_EXT_PIX_FMT <vidioc_g_ext_pix_fmt>` ioctl logic for video
> + * capture
> * @vidioc_g_fmt_vid_overlay: pointer to the function that implements
> * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video overlay
> * @vidioc_g_fmt_vid_out: pointer to the function that implements
> * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video out
> * in single plane mode
> + * @vidioc_g_ext_pix_fmt_vid_out: pointer to the function that implements
> + * :ref:`VIDIOC_G_EXT_PIX_FMT <vidioc_g_ext_pix_fmt>` ioctl logic for video
> + * out
> * @vidioc_g_fmt_vid_out_overlay: pointer to the function that implements
> * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video overlay output
> * @vidioc_g_fmt_vbi_cap: pointer to the function that implements
> @@ -82,11 +88,16 @@ struct v4l2_fh;
> * @vidioc_s_fmt_vid_cap: pointer to the function that implements
> * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video capture
> * in single plane mode
> + * @vidioc_s_ext_pix_fmt_vid_cap: pointer to the function that implements
> + * :ref:`VIDIOC_S_EXT_PIX_FMT <vidioc_g_ext_pix_fmt>` ioctl logic for video
> + * capture
> * @vidioc_s_fmt_vid_overlay: pointer to the function that implements
> * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video overlay
> * @vidioc_s_fmt_vid_out: pointer to the function that implements
> * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video out
> * in single plane mode
> + * @vidioc_s_ext_pix_fmt_vid_out: pointer to the function that implements
> + * :ref:`VIDIOC_S_EXT_PIX_FMT <vidioc_g_fmt>` ioctl logic for video out
> * @vidioc_s_fmt_vid_out_overlay: pointer to the function that implements
> * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video overlay output
> * @vidioc_s_fmt_vbi_cap: pointer to the function that implements
> @@ -116,11 +127,16 @@ struct v4l2_fh;
> * @vidioc_try_fmt_vid_cap: pointer to the function that implements
> * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video capture
> * in single plane mode
> + * @vidioc_try_ext_pix_fmt_vid_cap: pointer to the function that implements
> + * :ref:`VIDIOC_TRY_EXT_PIX_FMT <vidioc_g_ext_pix_fmt>` ioctl logic for
> + video capture
> * @vidioc_try_fmt_vid_overlay: pointer to the function that implements
> * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video overlay
> * @vidioc_try_fmt_vid_out: pointer to the function that implements
> * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video out
> * in single plane mode
> + * @vidioc_try_ext_pix_fmt_vid_out: pointer to the function that implements
> + * :ref:`VIDIOC_TRY_EXT_PIX_FMT <vidioc_g_fmt>` ioctl logic for video out
> * @vidioc_try_fmt_vid_out_overlay: pointer to the function that implements
> * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video overlay
> * output
> @@ -319,10 +335,14 @@ struct v4l2_ioctl_ops {
> /* VIDIOC_G_FMT handlers */
> int (*vidioc_g_fmt_vid_cap)(struct file *file, void *fh,
> struct v4l2_format *f);
> + int (*vidioc_g_ext_pix_fmt_vid_cap)(struct file *file, void *fh,
> + struct v4l2_ext_pix_format *f);
> int (*vidioc_g_fmt_vid_overlay)(struct file *file, void *fh,
> struct v4l2_format *f);
> int (*vidioc_g_fmt_vid_out)(struct file *file, void *fh,
> struct v4l2_format *f);
> + int (*vidioc_g_ext_pix_fmt_vid_out)(struct file *file, void *fh,
> + struct v4l2_ext_pix_format *f);
> int (*vidioc_g_fmt_vid_out_overlay)(struct file *file, void *fh,
> struct v4l2_format *f);
> int (*vidioc_g_fmt_vbi_cap)(struct file *file, void *fh,
> @@ -349,10 +369,14 @@ struct v4l2_ioctl_ops {
> /* VIDIOC_S_FMT handlers */
> int (*vidioc_s_fmt_vid_cap)(struct file *file, void *fh,
> struct v4l2_format *f);
> + int (*vidioc_s_ext_pix_fmt_vid_cap)(struct file *file, void *fh,
> + struct v4l2_ext_pix_format *f);
> int (*vidioc_s_fmt_vid_overlay)(struct file *file, void *fh,
> struct v4l2_format *f);
> int (*vidioc_s_fmt_vid_out)(struct file *file, void *fh,
> struct v4l2_format *f);
> + int (*vidioc_s_ext_pix_fmt_vid_out)(struct file *file, void *fh,
> + struct v4l2_ext_pix_format *f);
> int (*vidioc_s_fmt_vid_out_overlay)(struct file *file, void *fh,
> struct v4l2_format *f);
> int (*vidioc_s_fmt_vbi_cap)(struct file *file, void *fh,
> @@ -379,10 +403,14 @@ struct v4l2_ioctl_ops {
> /* VIDIOC_TRY_FMT handlers */
> int (*vidioc_try_fmt_vid_cap)(struct file *file, void *fh,
> struct v4l2_format *f);
> + int (*vidioc_try_ext_pix_fmt_vid_cap)(struct file *file, void *fh,
> + struct v4l2_ext_pix_format *f);
> int (*vidioc_try_fmt_vid_overlay)(struct file *file, void *fh,
> struct v4l2_format *f);
> int (*vidioc_try_fmt_vid_out)(struct file *file, void *fh,
> struct v4l2_format *f);
> + int (*vidioc_try_ext_pix_fmt_vid_out)(struct file *file, void *fh,
> + struct v4l2_ext_pix_format *f);
> int (*vidioc_try_fmt_vid_out_overlay)(struct file *file, void *fh,
> struct v4l2_format *f);
> int (*vidioc_try_fmt_vbi_cap)(struct file *file, void *fh,
> @@ -724,6 +752,12 @@ long int video_usercopy(struct file *file, unsigned int cmd,
> long int video_ioctl2(struct file *file,
> unsigned int cmd, unsigned long int arg);
>
> +int v4l2_format_to_ext_pix_format(const struct v4l2_format *f,
> + struct v4l2_ext_pix_format *e, bool strict);
> +int v4l2_ext_pix_format_to_format(const struct v4l2_ext_pix_format *e,
> + struct v4l2_format *f,
> + bool mplane_cap, bool strict);
> +
> /*
> * The user space interpretation of the 'v4l2_event' differs
> * based on the 'time_t' definition on 32-bit architectures, so
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index c7b70ff53bc1d..7123c6a4d9569 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -2254,6 +2254,58 @@ struct v4l2_pix_format_mplane {
> __u8 reserved[7];
> } __attribute__ ((packed));
>
> +/**
> + * struct v4l2_plane_ext_pix_format - additional, per-plane format definition
> + * @sizeimage: maximum size in bytes required for data, for which
> + * this plane will be used.
> + * Should be set to zero for unused planes.
> + * @bytesperline: distance in bytes between the leftmost pixels in two
> + * adjacent lines
> + * @reserved: extra space reserved for future fields, must be set to 0
> + */
> +struct v4l2_plane_ext_pix_format {
nit: Maybe v4l2_ext_plane_pix_format, since the struct describes an
ext variant of a plane_pix_format?
> + __u32 sizeimage;
> + __u32 bytesperline;
> + __u32 reserved;
> +};
Actually, this seems to be exactly the same as the existing
v4l2_plane_pix_format, except actually having less reserved space. Could it
make sense to just reuse the existing struct?
Best regards,
Tomasz
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