[alsa-devel] Removal of indirect access in control API
perex at perex.cz
Thu Nov 15 18:29:06 CET 2007
On Thu, 15 Nov 2007, Takashi Iwai wrote:
> ALSA control elements have "indirect" flag, which is supposed to allow
> the indirect access via pointer. But, as far as I know, this feature
> has never been used nor implemented, and unsupported via 32/64bit
> compat layer.
> So, I'd like to get rid of this now. The clean-up patch is below.
> If you have objections, please let me know.
I have objection. This layer was designed to support large mixer matrixes
like in the HDSPM driver (and if I remember correctly - implementation was
started after discussion with authors of RME drviers). HDSPM driver uses
hwdep interface now (probably because it was ported from the OSS code).
I think that it would be worth to use standard ALSA control interface to
track changes thus to finish indirect interface.
Which problems are with the 32/64 bit conversion layer? I suppose that it
is possible to write an ioctl converters.
Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
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