[alsa-devel] [PATCH] ASOC:DAPM: extend dapm kcontrol to support runtime route update

[Mark Brown]

On Thu, Dec 12, 2013 at 02:56:08AM -0800, Nenghua Cao wrote:

Don't top post.  Please also fix your mailer to word wrap within
paragaphs, it makes your mails much more legible.

>    For common mix/mux which aren't related with DPCM, it doesn't need
>    to do DPCM update. And it still can use the old controls. But for
>    the mix/mux which impacts fe<->be link, they need to do this works.
>    For them, they call use the new set of controls. I think it can
>    make our code has better backward-compatibility.

How does this improve backwards compatibility?
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