[alsa-devel] [PATCH RFC 0/7] Allow multiple callbacks for hda_jack

[David Henningsson]

On 2014-09-11 16:19, Takashi Iwai wrote:
> Hi,
>
> this is a series of patches I quickly cooked up after the discussion
> in this morning: the support of multiple callbacks per jack.
>
> The series is applied on top of the previous fix patch (ALSA: hda -
> Fix invalid pin powermap without jack detection).  It begins with
> a couple of cleanups, then introduces the new hda_jack_callback
> struct and the changes along with it, then ends with another
> couple of cleanup patches based on the new infrastructure.
>
> I've tested only with a small set of devices, so far.

In general I like this idea and I remember thinking along the same lines.

I'm pondering whether we could use a more memory efficient layout for 
the callback list. Like allocating a snd_array on codec level and have 
indices to that list instead of pointers. Then the kernel would have 
less memory blocks to worry about. What do you think?

-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic