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Message-ID: <CAEDqmY6Do8n=sdn8N=4Oc8cJwtQWUHMxxX37dgCv6GZDEgZy7A@mail.gmail.com>
Date: Mon, 9 Dec 2024 17:50:59 +0900
From: Yunke Cao <yunkec@...omium.org>
To: Ricardo Ribalda <ribalda@...omium.org>
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>, Hans de Goede <hdegoede@...hat.com>,
Ricardo Ribalda <ribalda@...nel.org>, Sakari Ailus <sakari.ailus@...ux.intel.com>,
Hans Verkuil <hverkuil@...all.nl>, linux-media@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v15 15/19] media: uvcvideo: let v4l2_query_v4l2_ctrl()
work with v4l2_query_ext_ctrl
Hi Ricardo,
This patch looks good to me.
Reviewed-by: Yunke Cao <yunkec@...gle.com>
Thanks,
Yunke
On Fri, Nov 15, 2024 at 4:11 AM Ricardo Ribalda <ribalda@...omium.org> wrote:
>
> v4l2_query_ext_ctrl contains information that is missing in
> v4l2_queryctrl, like elem_size and elems.
>
> With this change we can handle all the element_size information inside
> uvc_ctrl.c.
>
> Now that we are at it, remove the memset of the reserved fields, the
> v4l2 ioctl handler should do that for us.
>
> There is no functional change expected from this change.
>
> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
> ---
> drivers/media/usb/uvc/uvc_ctrl.c | 24 ++++++++++++++----------
> drivers/media/usb/uvc/uvc_v4l2.c | 35 +++++++++++++++--------------------
> drivers/media/usb/uvc/uvcvideo.h | 2 +-
> 3 files changed, 30 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
> index 72ed7dc9cfc1..1bc019138995 100644
> --- a/drivers/media/usb/uvc/uvc_ctrl.c
> +++ b/drivers/media/usb/uvc/uvc_ctrl.c
> @@ -1252,7 +1252,8 @@ static int __uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
> }
>
> static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
> - u32 found_id, struct v4l2_queryctrl *v4l2_ctrl)
> + u32 found_id,
> + struct v4l2_query_ext_ctrl *v4l2_ctrl)
> {
> int idx;
>
> @@ -1400,7 +1401,7 @@ static u32 uvc_get_ctrl_bitmap(struct uvc_control *ctrl,
> static int __uvc_queryctrl_boundaries(struct uvc_video_chain *chain,
> struct uvc_control *ctrl,
> struct uvc_control_mapping *mapping,
> - struct v4l2_queryctrl *v4l2_ctrl)
> + struct v4l2_query_ext_ctrl *v4l2_ctrl)
> {
> if (!ctrl->cached) {
> int ret = uvc_ctrl_populate_cache(chain, ctrl);
> @@ -1465,7 +1466,7 @@ static int __uvc_queryctrl_boundaries(struct uvc_video_chain *chain,
> static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
> struct uvc_control *ctrl,
> struct uvc_control_mapping *mapping,
> - struct v4l2_queryctrl *v4l2_ctrl)
> + struct v4l2_query_ext_ctrl *v4l2_ctrl)
> {
> struct uvc_control_mapping *master_map = NULL;
> struct uvc_control *master_ctrl = NULL;
> @@ -1503,6 +1504,9 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
> v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
> }
>
> + v4l2_ctrl->elem_size = sizeof(s32);
> + v4l2_ctrl->elems = 1;
> +
> if (v4l2_ctrl->type >= V4L2_CTRL_COMPOUND_TYPES) {
> v4l2_ctrl->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
> v4l2_ctrl->default_value = 0;
> @@ -1516,7 +1520,7 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
> }
>
> int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
> - struct v4l2_queryctrl *v4l2_ctrl)
> + struct v4l2_query_ext_ctrl *v4l2_ctrl)
> {
> struct uvc_control *ctrl;
> struct uvc_control_mapping *mapping;
> @@ -1642,7 +1646,7 @@ static void uvc_ctrl_fill_event(struct uvc_video_chain *chain,
> struct uvc_control_mapping *mapping,
> s32 value, u32 changes)
> {
> - struct v4l2_queryctrl v4l2_ctrl;
> + struct v4l2_query_ext_ctrl v4l2_ctrl;
>
> __uvc_query_v4l2_ctrl(chain, ctrl, mapping, &v4l2_ctrl);
>
> @@ -2119,7 +2123,7 @@ static int uvc_mapping_get_xctrl_std(struct uvc_video_chain *chain,
> struct uvc_control_mapping *mapping,
> u32 which, struct v4l2_ext_control *xctrl)
> {
> - struct v4l2_queryctrl qc;
> + struct v4l2_query_ext_ctrl qec;
> int ret;
>
> switch (which) {
> @@ -2133,19 +2137,19 @@ static int uvc_mapping_get_xctrl_std(struct uvc_video_chain *chain,
> return -EINVAL;
> }
>
> - ret = __uvc_queryctrl_boundaries(chain, ctrl, mapping, &qc);
> + ret = __uvc_queryctrl_boundaries(chain, ctrl, mapping, &qec);
> if (ret < 0)
> return ret;
>
> switch (which) {
> case V4L2_CTRL_WHICH_DEF_VAL:
> - xctrl->value = qc.default_value;
> + xctrl->value = qec.default_value;
> break;
> case V4L2_CTRL_WHICH_MIN_VAL:
> - xctrl->value = qc.minimum;
> + xctrl->value = qec.minimum;
> break;
> case V4L2_CTRL_WHICH_MAX_VAL:
> - xctrl->value = qc.maximum;
> + xctrl->value = qec.maximum;
> break;
> }
>
> diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
> index 7e284770149d..5000c74271e0 100644
> --- a/drivers/media/usb/uvc/uvc_v4l2.c
> +++ b/drivers/media/usb/uvc/uvc_v4l2.c
> @@ -1014,40 +1014,35 @@ static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input)
> return ret;
> }
>
> -static int uvc_ioctl_queryctrl(struct file *file, void *fh,
> - struct v4l2_queryctrl *qc)
> +static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh,
> + struct v4l2_query_ext_ctrl *qec)
> {
> struct uvc_fh *handle = fh;
> struct uvc_video_chain *chain = handle->chain;
>
> - return uvc_query_v4l2_ctrl(chain, qc);
> + return uvc_query_v4l2_ctrl(chain, qec);
> }
>
> -static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh,
> - struct v4l2_query_ext_ctrl *qec)
> +static int uvc_ioctl_queryctrl(struct file *file, void *fh,
> + struct v4l2_queryctrl *qc)
> {
> struct uvc_fh *handle = fh;
> struct uvc_video_chain *chain = handle->chain;
> - struct v4l2_queryctrl qc = { qec->id };
> + struct v4l2_query_ext_ctrl qec = { qc->id };
> int ret;
>
> - ret = uvc_query_v4l2_ctrl(chain, &qc);
> + ret = uvc_query_v4l2_ctrl(chain, &qec);
> if (ret)
> return ret;
>
> - qec->id = qc.id;
> - qec->type = qc.type;
> - strscpy(qec->name, qc.name, sizeof(qec->name));
> - qec->minimum = qc.minimum;
> - qec->maximum = qc.maximum;
> - qec->step = qc.step;
> - qec->default_value = qc.default_value;
> - qec->flags = qc.flags;
> - qec->elem_size = 4;
> - qec->elems = 1;
> - qec->nr_of_dims = 0;
> - memset(qec->dims, 0, sizeof(qec->dims));
> - memset(qec->reserved, 0, sizeof(qec->reserved));
> + qc->id = qec.id;
> + qc->type = qec.type;
> + strscpy(qc->name, qec.name, sizeof(qc->name));
> + qc->minimum = qec.minimum;
> + qc->maximum = qec.maximum;
> + qc->step = qec.step;
> + qc->default_value = qec.default_value;
> + qc->flags = qec.flags;
>
> return 0;
> }
> diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
> index f429f325433b..8aca1a2fe587 100644
> --- a/drivers/media/usb/uvc/uvcvideo.h
> +++ b/drivers/media/usb/uvc/uvcvideo.h
> @@ -766,7 +766,7 @@ void uvc_status_put(struct uvc_device *dev);
> extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
>
> int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
> - struct v4l2_queryctrl *v4l2_ctrl);
> + struct v4l2_query_ext_ctrl *v4l2_ctrl);
> int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
> struct v4l2_querymenu *query_menu);
>
>
> --
> 2.47.0.338.g60cca15819-goog
>
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