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85fbe91a7c
Similarly to Logitech C922, C920 seems to also suffer from a firmware
bug that breaks hardware timestamping.
Add a quirk for this camera model too.
Before applying the quirk:
```
100 (4) [-] none 100 200717 B 212.919114 213.079004 33.727 fps ts mono/SoE
101 (5) [-] none 101 200889 B 213.003703 213.114996 11.822 fps ts mono/SoE
102 (6) [-] none 102 200926 B 213.035571 213.146999 31.379 fps ts mono/SoE
103 (7) [-] none 103 200839 B 213.067424 213.179003 31.394 fps ts mono/SoE
104 (0) [-] none 104 200692 B 213.293180 213.214991 4.430 fps ts mono/SoE
105 (1) [-] none 105 200937 B 213.322374 213.247001 34.254 fps ts mono/SoE
106 (2) [-] none 106 201013 B 213.352228 213.279005 33.496 fps ts mono/SoE
…
```
After applying the quirk:
```
154 (2) [-] none 154 192417 B 42.199823 42.207788 27.779 fps ts mono/SoE
155 (3) [-] none 155 192040 B 42.231834 42.239791 31.239 fps ts mono/SoE
156 (4) [-] none 156 192213 B 42.263823 42.271822 31.261 fps ts mono/SoE
157 (5) [-] none 157 191981 B 42.299824 42.303827 27.777 fps ts mono/SoE
158 (6) [-] none 158 191953 B 42.331835 42.339811 31.239 fps ts mono/SoE
159 (7) [-] none 159 191904 B 42.363824 42.371813 31.261 fps ts mono/SoE
160 (0) [-] none 160 192210 B 42.399834 42.407801 27.770 fps ts mono/SoE
```
Fixes: 5d0fd3c806 ("[media] uvcvideo: Disable hardware timestamps by default")
Signed-off-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20240325142611.15550-1-oleksandr@natalenko.name
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.