Re: uvideo

[Patrick Welche <prlw1%welche.eu@localhost>]

On Sat, Apr 12, 2025 at 08:25:49PM -0000, Michael van Elst wrote:
> Build a kernel with option UVIDEO_DEBUG, this might give some hint about the error.

Right!

# videoctl -d /dev/video0 -a
videoctl: couldn't open '/dev/video0': Input/output error

videoopen
videoopen: flags=0x1 sc=0xffff81a57e505c40 parent=0xffff81a57e4e15c0
uvideo_open: sc=0xffff81a57e4eac40
uvideo_set_format: sc=0xffff81a57e4eac40
uvideo: error probe/GET_MAX: STALLED (17)
uvideo: error commit/SET_CUR: STALLED (17)

... usbd_do_request_len()... time to add USB_DEBUG...

> But a USB video device with two interfaces and two video streams
> per interface is something new...

and usbdevs just shows

 port 6 addr 2: high speed, power 500 mA, config 1, Integrated_Webcam_HD(0x5531), CKFIH12P466071019182(0x0bda), rev 81.78(0x8178), serial 200901010001
   uvideo0
   uvideo1

no sign of uvideo2 and 3.


Cheers,

Patrick