What about:
rmmod uvcvideo
modprobe uvcvideo trace=0xffffffff
then run your program
You might be able to figure out what xu controls are discovered.
On Fri, 28 Apr 2023 at 10:50, hardycheng(鄭易昕) <hardycheng@xxxxxxx> wrote:
>
> Hi Ricardo,
>
> Thank you for such a quick reply.
> Follow your advice, but I just got few logs in dmesg
>
> [ 9452.677337] usb 1-1: uvc_v4l2_open
> [ 9452.725254] usb 1-1: Resuming interface 0
> [ 9452.725258] usb 1-1: Resuming interface 1
> [ 9452.751971] usb 1-1: uvc_v4l2_release
> [ 9455.236973] usb 1-1: Suspending interface 1
> [ 9455.236977] usb 1-1: Suspending interface 0
>
> Is there any way to get more debug message about this issue?
>
>
> Best Regards,
> Hardy#2374
>
>
> -----Original Message-----
> From: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
> Sent: Friday, April 28, 2023 4:45 PM
> To: hardycheng(鄭易昕) <hardycheng@xxxxxxx>
> Cc: linux-media@xxxxxxxxxxxxxxx
> Subject: Re: UVCIOC_CTRL_MAP not work
>
> Hi Hardy
>
> try running:
>
> echo 0xffffffff > /sys/module/uvcvideo/parameters/trace
>
> and then your program
>
> and then dmesg
>
> It will tell you where it got stock
>
> Regards!
>
> On Fri, 28 Apr 2023 at 10:38, hardycheng(鄭易昕) <hardycheng@xxxxxxx> wrote:
> >
> > Hi Ricardo,
> >
> > So I modify the `uvc_xu_control_mapping` struct as follows:
> > (full code reference attachment `uvc_xu_v4l_mapping_demo.c`) struct
> > uvc_xu_control_mapping mapping = {
> > .id = 0x01,
> > .name = "My Extension Unit",
> > .entity = {0x10, 0xbc, 0x46, 0xba, 0x28, 0x5a, 0x4d, 0x7b, 0x97, 0x0e, 0xfd, 0x91, 0x46, 0xa5, 0x2f, 0x2d},
> > .selector = 0x01,
> > .size = 32,
> > .offset = 0,
> > .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
> > .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
> > .menu_info = NULL,
> > .menu_count = 0,
> > .reserved = {0},
> > };
> >
> > And I got difference error message `UVCIOC_CTRL_MAP: No such file or
> > directory` Please check attachment `strace_20230428_2.log` for strace
> > output
> >
> >
> > Best Regards,
> > Hardy
> >
> >
> > -----Original Message-----
> > From: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
> > Sent: Friday, April 28, 2023 4:26 PM
> > To: hardycheng(鄭易昕) <hardycheng@xxxxxxx>
> > Cc: linux-media@xxxxxxxxxxxxxxx
> > Subject: Re: UVCIOC_CTRL_MAP not work
> >
> > Hi Hardy
> >
> > Seems like you can only add mappings for V4L2_CTRL_TYPE_INTEGER, V4L2_CTRL_TYPE_BOOLEAN:V4L2_CTRL_TYPE_BUTTON and V4L2_CTRL_TYPE_MENU.
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tre
> > e/drivers/media/usb/uvc/uvc_v4l2.c#n130
> >
> > You are trying to add a map for a V4L2_CTRL_TYPE_STRING
> >
> > Regards
> >
> > On Fri, 28 Apr 2023 at 10:20, hardycheng(鄭易昕) <hardycheng@xxxxxxx> wrote:
> > >
> > > Hi Ricardo,
> > >
> > > Thanks for reply,
> > >
> > > I replace `_IOWR('u', 0x20, struct uvc_xu_control_mapping)` to `
> > > UVCIOC_CTRL_MAP` and got the same error, Please check attachment for
> > > command output `strace -f ./uvc_xu_v4l_mapping_demo`
> > >
> > > Best Regards,
> > > Hardy
> > >
> > > -----Original Message-----
> > > From: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
> > > Sent: Friday, April 28, 2023 4:04 PM
> > > To: hardycheng(鄭易昕) <hardycheng@xxxxxxx>
> > > Cc: linux-media@xxxxxxxxxxxxxxx
> > > Subject: Re: UVCIOC_CTRL_MAP not work
> > >
> > > Hi Hardy
> > >
> > > Why are you using:
> > >
> > > result = ioctl(fd, _IOWR('u', 0x20, struct uvc_xu_control_mapping),
> > > &mapping);
> > >
> > > instead of
> > >
> > > result = ioctl(fd, UVCIOC_CTRL_MAP, &mapping);
> > >
> > > Can you return the output of:
> > >
> > > strace -f uvc_xu_v4l_mapping_demo
> > >
> > > Thanks!
> > >
> > > On Fri, 28 Apr 2023 at 09:15, hardycheng(鄭易昕) <hardycheng@xxxxxxx> wrote:
> > > >
> > > > Hi,
> > > >
> > > > # Environment:
> > > >
> > > > OS = Ubuntu 22.04 LTS (Linux version 5.19.0-41-generic) Program
> > > > Language = C Language
> > > >
> > > > # Overview:
> > > >
> > > > We plug in our UVC camera to PC, and try to use `UVCIOC_CTRL_MAP`
> > > > function on PC to create the v4l2 control mapping, but we got
> > > > error
> > > > `UVCIOC_CTRL_MAP: Inappropriate ioctl for device` Development with
> > > > `C language` in `Ubuntu 22.04 LTS`
> > > >
> > > > # Description:
> > > >
> > > > We have a custom UVC camera and we can modify the extension
> > > > unit(XU) by ourself. (USB descriptions reference attachments
> > > > `uvc_xu_descriptor.PNG` & `usb_decriptions.txt`)
> > > >
> > > > We make sure that UVCIOC_CTRL_QUERY is work to control our XU item
> > > > (demo code in attachment `uvc_xu_ioctl_demo.c`)
> > > >
> > > > but UVCIOC_CTRL_MAP function fail with error message `UVCIOC_CTRL_MAP:
> > > > Inappropriate ioctl for device` (demo code in attachment
> > > > `uvc_xu_v4l_mapping_demo.c`)
> > > >
> > > > # Problems:
> > > >
> > > > 1. Is UVCIOC_CTRL_MAP function using in the PC host?
> > > > 2. Can you found any syntax problem in our demo code `uvc_xu_v4l_mapping_demo.c`?
> > > > 3. Is there any sample code about struct `uvc_xu_control_mapping` using?
> > > >
> > > > Looking forward to your reply,
> > > > Best Regards,
> > > > Hardy#2374
> > > >
> > > > *****CONFIDENTIAL INFORMATION*****
> > > >
> > > > This email is intended only for the use of the person or entity to
> > > > whom it is addressed and contains information that may be subject
> > > > to and/or may be restricted from disclosure by contract or
> > > > applicable law. If you are not the intended recipient of this
> > > > email, be advised that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > > If you are not the intended recipient of this email, please notify
> > > > the sender that you have received this in error by replying to
> > > > this message. Then, please delete it from your system. Our Privacy
> > > > Policy is available here https://www.msi.com/page/privacy-policy. Thank you.
> > >
> > >
> > >
> > > --
> > > Ricardo Ribalda
> > >
> > >
> > > *****CONFIDENTIAL INFORMATION*****
> > >
> > > This email is intended only for the use of the person or entity to
> > > whom it is addressed and contains information that may be subject to
> > > and/or may be restricted from disclosure by contract or applicable
> > > law. If you are not the intended recipient of this email, be advised
> > > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > > If you are not the intended recipient of this email, please notify
> > > the sender that you have received this in error by replying to this
> > > message. Then, please delete it from your system. Our Privacy Policy
> > > is available here https://www.msi.com/page/privacy-policy. Thank you.
> >
> >
> >
> > --
> > Ricardo Ribalda
> >
> >
> > *****CONFIDENTIAL INFORMATION*****
> >
> > This email is intended only for the use of the person or entity to
> > whom it is addressed and contains information that may be subject to
> > and/or may be restricted from disclosure by contract or applicable
> > law. If you are not the intended recipient of this email, be advised
> > that any disclosure, copy, distribution or use of the contents of this message is strictly prohibited.
> > If you are not the intended recipient of this email, please notify the
> > sender that you have received this in error by replying to this
> > message. Then, please delete it from your system. Our Privacy Policy
> > is available here https://www.msi.com/page/privacy-policy. Thank you.
>
>
>
> --
> Ricardo Ribalda
>
>
> *****CONFIDENTIAL INFORMATION*****
>
> This email is intended only for the use of the person or entity to whom it is
> addressed and contains information that may be subject to and/or may be
> restricted from disclosure by contract or applicable law. If you are not the
> intended recipient of this email, be advised that any disclosure, copy,
> distribution or use of the contents of this message is strictly prohibited.
> If you are not the intended recipient of this email, please notify the sender
> that you have received this in error by replying to this message. Then,
> please delete it from your system. Our Privacy Policy is available here
> https://www.msi.com/page/privacy-policy. Thank you.
--
Ricardo Ribalda
