Re: [PATCH] [RFC] ASoC: Conditional PCM support

[Mark Brown <broonie@xxxxxxxxxx>]

On Thu, Aug 22, 2024 at 03:57:22PM +0200, Cezary Rojewski wrote:
> On 2024-08-21 2:43 PM, Pierre-Louis Bossart wrote:

> > The point about dependencies between capture/playback usages is
> > certainly valid, and we've faced it multiple times for SOF - and even
> > before in the mobile phone days. I am not convinced however that the
> > graph management suggested here solves the well-known DPCM routing
> > problems? See notes in no specific order below.

> While at it, do we (Mark perhaps?) have some kind of a list with major
> problems troubling ASoC? I keep seeing "DPCM is problematic" on the
> mailing-list. If DPCM is indeed in such bad state, perhaps we should address
> this sooner rather than later.

Honestly I think DPCM is the only major problem we've got.  The problem
is that addressing it is very non-trivial, we've had a rough design for
what we want to do for about a decade (look for some of Lars-Peter's ELC
presentations for some summaries) but what we're missing is someone with
the required combination of time and enthusiasm to actually implement
it.  A lot of the refactorings that Morimoto-san has been doing which
move everything to be a component rather than distinct CODEC, CPU or
platform types has been preparatory to the main refactoring.

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