[alsa-devel] [PATCH 4/5] intelhdmi - add channel mapping for typical configurations

Takashi Iwai tiwai at suse.de
Fri Dec 11 08:00:29 CET 2009

At Fri, 11 Dec 2009 12:28:36 +0800,
Wu Fengguang wrote:
> IbexPeak is the first Intel HDMI audio codec to support channel mapping.
> Currently the outstanding problem is, the HDMI channel order do not
> agree with that of ALSA.  This patch presents workaround for some
> typical use cases. It gives priority to the typical ALSA surround
> configurations, and defines channel mapping for them.

This looks good.  At least, this can reduce confusions.

> We may need better kernel+userspace interactive channel mapping scheme.
> For example, in current scheme if user plays with the surround50 device,
> the kernel is unaware of this and will still select the surround41
> channel allocation and channel mapping..

Yes, more flexible channel mapping is on my TODO list.
I have a half-finished patch series, but need to rebase and brush up.
Let's fix it for 2.6.34.



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