Hello,
CC'ing Ricardo.
On Tue, Jun 06, 2023 at 12:40:25PM +0200, Linux regression tracking (Thorsten Leemhuis) wrote:
> CCing a few people and lists that should be aware of this and might be
> able to help.
>
> On 05.06.23 18:39, Poncho wrote:
> > With kernel 6.3, the LED of my C922 Pro Stream Webcam is no longer
> > controllable.
> >
> > With kernel 6.1 v4l2-ctl --all returns:
> >
> >> led1_mode 0x0a046d05 (menu) : min=0 max=3 default=0 value=0 (Off)
> >> 0: Off
> >> 1: On
> >> 2: Blink
> >> 3: Auto
> >
> >
> >
> > but with kernel 6.3 I get:
> >
> >> led1_mode 0x0a046d05 (menu) : min=4 max=4 default=0 value=0
> >> 4:
>
> Thanks for the report.
>
> FWIW, maybe one of those people that I CCed has an idea what's wrong. If
> none of them brings one to the table withing the next two or three days,
> you likely have to perform a bisection to find the change that broke
> thing for you.
I suspect commit 716c330433e3 ("media: uvcvideo: Use standard names for
menus") to be the culprit. I'll post a (untested) candidate fix in reply
to this e-mail.
> For the rest of this mail:
>
> [TLDR: I'm adding this report to the list of tracked Linux kernel
> regressions; the text you find below is based on a few templates
> paragraphs you might have encountered already in similar form.
> See link in footer if these mails annoy you.]
>
> > Full output bellow:
> >
> >> Driver Info:
> >> Driver name : uvcvideo
> >> Card type : C922 Pro Stream Webcam
> >> Bus info : usb-0000:00:14.0-9
> >> Driver version : 6.3.5
> >> Capabilities : 0x84a00001
> >> Video Capture
> >> Metadata Capture
> >> Streaming
> >> Extended Pix Format
> >> Device Capabilities
> >> Device Caps : 0x04200001
> >> Video Capture
> >> Streaming
> >> Extended Pix Format
> >> Media Driver Info:
> >> Driver name : uvcvideo
> >> Model : C922 Pro Stream Webcam
> >> Serial : 6E8DF1BF
> >> Bus info : usb-0000:00:14.0-9
> >> Media version : 6.3.5
> >> Hardware revision: 0x00000016 (22)
> >> Driver version : 6.3.5
> >> Interface Info:
> >> ID : 0x03000002
> >> Type : V4L Video
> >> Entity Info:
> >> ID : 0x00000001 (1)
> >> Name : C922 Pro Stream Webcam
> >> Function : V4L2 I/O
> >> Flags : default
> >> Pad 0x01000007 : 0: Sink
> >> Link 0x0200001f: from remote pad 0x100000a of entity 'Processing 3' (Video Pixel Formatter): Data, Enabled, Immutable
> >> Priority: 2
> >> Video input : 0 (Camera 1: ok)
> >> Format Video Capture:
> >> Width/Height : 160/90
> >> Pixel Format : 'YUYV' (YUYV 4:2:2)
> >> Field : None
> >> Bytes per Line : 320
> >> Size Image : 28800
> >> Colorspace : sRGB
> >> Transfer Function : Rec. 709
> >> YCbCr/HSV Encoding: ITU-R 601
> >> Quantization : Default (maps to Limited Range)
> >> Flags : Crop Capability Video Capture:
> >> Bounds : Left 0, Top 0, Width 160, Height 90
> >> Default : Left 0, Top 0, Width 160, Height 90
> >> Pixel Aspect: 1/1
> >> Selection Video Capture: crop_default, Left 0, Top 0, Width 160,
> >> Height 90, Flags: Selection Video Capture: crop_bounds, Left 0, Top 0,
> >> Width 160, Height 90, Flags: Streaming Parameters Video Capture:
> >> Capabilities : timeperframe
> >> Frames per second: 30.000 (30/1)
> >> Read buffers : 0
> >>
> >> User Controls
> >>
> >> brightness 0x00980900 (int) : min=0 max=255 step=1 default=128 value=128
> >> contrast 0x00980901 (int) : min=0 max=255 step=1 default=128 value=128
> >> saturation 0x00980902 (int) : min=0 max=255 step=1 default=128 value=128
> >> white_balance_automatic 0x0098090c (bool) : default=1 value=1
> >> gain 0x00980913 (int) : min=0 max=255 step=1 default=0 value=0
> >> power_line_frequency 0x00980918 (menu) : min=0 max=2 default=2 value=2 (60 Hz)
> >> 0: Disabled
> >> 1: 50 Hz
> >> 2: 60 Hz
> >> white_balance_temperature 0x0098091a (int) : min=2000 max=6500 step=1 default=4000 value=4000 flags=inactive
> >> sharpness 0x0098091b (int) : min=0 max=255 step=1 default=128 value=128
> >> backlight_compensation 0x0098091c (int) : min=0 max=1 step=1 default=0 value=0
> >>
> >> Camera Controls
> >>
> >> auto_exposure 0x009a0901 (menu) : min=0 max=3 default=3 value=3 (Aperture Priority Mode)
> >> 1: Manual Mode
> >> 3: Aperture Priority Mode
> >> exposure_time_absolute 0x009a0902 (int) : min=3 max=2047 step=1 default=250 value=250 flags=inactive
> >> exposure_dynamic_framerate 0x009a0903 (bool) : default=0 value=1
> >> pan_absolute 0x009a0908 (int) : min=-36000 max=36000 step=3600 default=0 value=0
> >> tilt_absolute 0x009a0909 (int) : min=-36000 max=36000 step=3600 default=0 value=0
> >> focus_absolute 0x009a090a (int) : min=0 max=250 step=5 default=0 value=0 flags=inactive
> >> focus_automatic_continuous 0x009a090c (bool) : default=1 value=1
> >> zoom_absolute 0x009a090d (int) : min=100 max=500 step=1 default=100 value=100
> >> led1_mode 0x0a046d05 (menu) : min=4 max=4 default=0 value=0
> >> 4: led1_frequency 0x0a046d06 (int)
> >> : min=0 max=255 step=1 default=0 value=255
>
> To be sure the issue doesn't fall through the cracks unnoticed, I'm
> adding it to regzbot, the Linux kernel regression tracking bot:
>
> #regzbot ^introduced v6.1..v6.3
> #regzbot title media: uvcvideo: Webcam LED control regression
> #regzbot ignore-activity
>
> This isn't a regression? This issue or a fix for it are already
> discussed somewhere else? It was fixed already? You want to clarify when
> the regression started to happen? Or point out I got the title or
> something else totally wrong? Then just reply and tell me -- ideally
> while also telling regzbot about it, as explained by the page listed in
> the footer of this mail.
>
> Developers: When fixing the issue, remember to add 'Link:' tags pointing
> to the report (the parent of this mail). See page linked in footer for
> details.
>
> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> --
> Everything you wanna know about Linux kernel regression tracking:
> https://linux-regtracking.leemhuis.info/about/#tldr
> That page also explains what to do if mails like this annoy you.
--
Regards,
Laurent Pinchart
