[PATCH RFC 09/11] sound/core: add IEC958 channel status helper

[Russell King - ARM Linux]

On Wed, Apr 01, 2015 at 10:04:03AM +0800, Yakir wrote:
> Hi Russell,
> 
> 在 2015/3/31 17:13, Russell King - ARM Linux 写道:
> >As for the channel number, this is intentionally left to the driver -
> >most cases I've found either the driver isn't interested, or where
> >they are interested (the only case I know of is my dw_hdmi ahb audio
> >driver), it's more appropriate to generate a baseline channel status,
> >and let the driver iterate over the channels adding the appropriate
> >channel number in.
> Okay, agree with you to keep baseline channel status, but seems dw_hdmi
> i2s audio are interested in channle number (to fill in schnl resigeters).

Correct - but it's pointless having it in this helper as I explained.
Please read my dw_hdmi-ahb-audio code to see why.

It would be wasteful to memset the structure back to zero, only to
re-fill it with exactly the same data except for the channel number.

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