[alsa-devel] Separate input and output jacks for one UCM device?

[Mark Brown]

On Thu, Mar 19, 2015 at 03:37:12PM +0100, Takashi Iwai wrote:

> The uniqueness of item name is also needed for input jack.  There is
> no check as of now, and input drivers allow multiple items with the
> very same name string, but user-space can't distinguish them.

The theory is that this is handled by the fact that the userspace ABI
includes a reference to the struct device and therefore a chain showing
where the thing is attached; anything registering two different jacks
with the same name attached to the same device probably qualifies as
broken.
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