Hi Ricardo,

Thank you for the patch.

On Thu, Mar 11, 2021 at 11:19:41PM +0100, Ricardo Ribalda wrote:
> Drivers that do not use the ctrl-framework use this function instead.
> 
> - Return error when handling of REQUEST_VAL.
> - Do not check for multiple classes when getting the DEF_VAL.
> 
> Fixes v4l2-compliance:
> Control ioctls (Input 0):
>               fail: v4l2-test-controls.cpp(813): doioctl(node, 
> VIDIOC_G_EXT_CTRLS, &ctrls)
>       test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL
> 
> Cc: [email protected]
> Fixes: 6fa6f831f095 ("media: v4l2-ctrls: add core request support")
> Suggested-by: Hans Verkuil <[email protected]>
> Signed-off-by: Ricardo Ribalda <[email protected]>
> ---
>  drivers/media/v4l2-core/v4l2-ioctl.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c 
> b/drivers/media/v4l2-core/v4l2-ioctl.c
> index 31d1342e61e8..6f6b310e2802 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -924,8 +924,10 @@ static int check_ext_ctrls(struct v4l2_ext_controls *c, 
> int allow_priv)
>        */
>       if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
>               return 0;
> -     if (!c->which)
> +     if (!c->which || c->which == V4L2_CTRL_WHICH_DEF_VAL)

How about

        if (c->which == V4L2_CTRL_WHICH_CUR_VAL ||
            c->which == V4L2_CTRL_WHICH_DEF_VAL)

>               return 1;
> +     if (c->which == V4L2_CTRL_WHICH_REQUEST_VAL)
> +             return 0;

Or possibly

        switch (c->which) {
        case V4L2_CTRL_WHICH_CUR_VAL:
        case V4L2_CTRL_WHICH_DEF_VAL:
                return 1;
        case V4L2_CTRL_WHICH_REQUEST_VAL:
                return 0;
        }

Reviewed-by: Laurent Pinchart <[email protected]>

>       /* Check that all controls are from the same control class. */
>       for (i = 0; i < c->count; i++) {
>               if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {

-- 
Regards,

Laurent Pinchart

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