[linux-dvb] getting rid of input dev in dvb-usb (was: Re: [PATCH] Add remote control support to Nova-TD (52009))
Mauro Carvalho Chehab
mchehab at infradead.org
Fri Sep 26 00:58:10 CEST 2008
On Fri, 26 Sep 2008, Patrick Boettcher wrote:
> That sounds great, though I would prefer a more generic solution if it
> exists/will exist.
> Assuming I would go with this one: how could I make sure, that I don't break
> support for existing users? Is there a way to request/suggest a certain
> keymap from the kernel module, depending on the device's default.
> If not, I think we have problem - we shall not forget, we are plumbers ;).
> Maybe the solution is to go with this model in the future and keep the
> current keymaps where they are?
I think so. Just removing the keycodes will break backward compat.
> What do you think?
I think that some plumbering is needed to automate keycode load.
There's no daemon or script that uses this. I think that we should discuss
this with udev guys. Ideally, a udev rule may run an userspace program to
detect the hardware type and load the default key. This program should
check for some /etc/sysconfig file to see if it should load a non-default
Inside the kernel, all you need is to use the default event interface. If
I remember well, for this to work, you need to inform input layer about
the size of the IR table.
There's a helper function used by V4L and some DVB devices at:
If you want users to allow changing IR tables dynamically, the better is
to use IR_KEYTAB_SIZE for the key size on all IR's. This way programable
IR's with lots of keycodes can also be used.
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