>> Does the dynctl api allows this additional functionality to be
exported via
>> the sysfs filesystem, too? Or would this require an additional
sub-module
>> e.g. uvcvideo-logitech.ko which exports this (and only this)
additional
>> functionality via sysfs?
>
> No sysfs exports exists yet. What exactly do you want to export ? V4L2
> controls ? UVC controls ? How do you handle permissions on those ?
For instance, I would like to be able to easily control the LED one day e.g.
via:
# echo "blinking" > /sys/module/uvcvideo/parameters/status_led
# echo "auto" > /sys/module/uvcvideo/parameters/status_led
# echo "on" > /sys/module/uvcvideo/parameters/status_led
# echo "off" > /sys/module/uvcvideo/parameters/status_led
Permissions should be set via udev rules, e.g. like this:
KERNEL=="uvcvideo", GROUP="video", MODE="0664"
So every user which is in the group 'video' could write/set the LED,
if it was exported via sysfs. And if you don't want that, you could
change the GROUP or MODE values to your needs.
I must admit, I don't know much about ioctls (yet). But it seems like,
if I would like to control the LED at the moment, I would need to write
my own code, correct? There's no way to access ioctls directly from
within a shell? So having sysfs hooks for certain settings and controls
would be very nice.
Best regards,
Jörg
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