linux-kernel - Re: [RFC PATCH 0/3] Separate BE DAI HW constraints from FE ones

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ad5d556b-601f-c6f6-347e-86a235237c02@microchip.com>
Date:   Fri, 16 Apr 2021 16:03:05 +0000
From:   <Codrin.Ciubotariu@...rochip.com>
To:     <broonie@...nel.org>
CC:     <perex@...ex.cz>, <alsa-devel@...a-project.org>,
        <linux-kernel@...r.kernel.org>, <gustavoars@...nel.org>,
        <mirq-linux@...e.qmqm.pl>, <tiwai@...e.com>, <lgirdwood@...il.com>
Subject: Re: [RFC PATCH 0/3] Separate BE DAI HW constraints from FE ones

On 15.04.2021 20:25, Mark Brown wrote:
> On Thu, Apr 15, 2021 at 04:56:00PM +0000, Codrin.Ciubotariu@...rochip.com wrote:
> 
>> Are there any plans for refactoring DPCM? any ideas ongoing? I also have
>> some changes for PCM dmaengine, in the same 'style', similar to what I
>> sent some time ago...
>> I can adjust to different ideas, if there are any, but, for a start, can
>> anyone confirm that the problem I am trying to fix is real?
> 
> Lars-Peter's presentation from ELC in 2016 (!) is probably the clearest
> summary of the ideas:
> 
>     https://elinux.org/images/e/e7/Audio_on_Linux.pdf
>     https://youtu.be/6oQF2TzCYtQ
> 
> Essentially the idea is to represent everything, including the DSPs, as
> ASoC components and be able to represent the digital links between
> components in the DAPM graph in the same way we currently represent
> analogue links.  This means we need a way to propagate digital
> configuration along the DAPM graph (or a parallel, cross linked digital
> one).  Sadly I'm not really aware of anyone actively working on the
> actual conversion at the minute, Morimoto-san has done a lot of great
> preparatory work to make everything a component which makes the whole
> thing more tractable.
> 

Thank you for the links! So basically the machine driver disappears and 
all the components will be visible in user-space.
If there is a list with the 'steps' or tasks to achieve this? I can try 
to pitch in.

Best regards,
Codrin