[PATCH 0/2 v4] ALSA: pcm: anonymous dup implementation

[Phil Burk]

Hello Mark,

I wrote to Peter Huang at UniSOC

>  Did you ever get a chance to try the Linaro patches? Did they work for
you?



Peter wrote:

>  we have tried these patches, and they works. [snip]

>  And Baolin also suggests that his patch is too complicated and difficult
to maintain, and a better solution is list as below, this new patch I have
not tried.



[1]:

https://lore.kernel.org/patchwork/patch/1033206/



[2]:

https://www.alsa-project.org/pipermail/alsa-devel/2019-January/144925.html

https://www.alsa-project.org/pipermail/alsa-devel/2019-January/144924.html


It is hard for me to extract the relevant patches from those emails.


I would love to finish this project but I am not sure how. It seems we need
to:


1) Evaluate the patches that Baolin suggests as a simpler alternative.

2) Test them in an Android kernel with AAudio MMAP.


If you can provide a clear description of the latest set of patches then
maybe I can work with someone in-house to test this.


I am open to suggestions.


Phil Burk



On Mon, Jun 8, 2020 at 10:49 AM Phil Burk <philburk at google.com> wrote:

> Hello Mark,
>
> Thank you for keeping this moving forward.
>
> We sent the patches out to several SOC vendors for Android last year.
> They thanked us and said they would send feedback but never did.
> I pinged them again.
>
> If we cannot get the changes tested by partners then I will try to get
> them tested internally.
>
> For reference, this is being tracked internally at b/119712034
> <https://buganizer.corp.google.com/119712034>
>
> Thanks,
> Phil Burk
>
>
>
> On Mon, Jun 8, 2020 at 6:45 AM Mark Brown <broonie at kernel.org> wrote:
>
>> On Tue, Apr 23, 2019 at 01:11:50PM -0700, Phil Burk wrote:
>> > Hello Takashi,
>> >
>> > Sorry for the late reply. I got pulled off on some other projects.
>> >
>> > We will try to test this in-house but we will need Qualcomm's help.
>> > I will also try to get some of our SOC partners to help with testing.
>>
>> Did anything ever happen with this testing?  These anonymous mmap
>> patches never got merged.
>>
>