RE: [PATCH v2] ASoC: amd: put off registering mach platform_dev to avoid -517 err

["Mukunda, Vijendar" <Vijendar.Mukunda@amd.com>]

[AMD Official Use Only - Internal Distribution Only]



> -----Original Message-----
> From: Hui Wang <hui.wang@canonical.com>
> Sent: Friday, May 22, 2020 7:27 PM
> To: Mukunda, Vijendar <Vijendar.Mukunda@amd.com>; Mark Brown
> <broonie@kernel.org>
> Cc: alsa-devel@alsa-project.org
> Subject: Re: [PATCH v2] ASoC: amd: put off registering mach platform_dev to
> avoid -517 err
> 
> 
> On 2020/5/22 下午8:59, Hui Wang wrote:
> >
> > On 2020/5/22 下午7:28, Mukunda, Vijendar wrote:
> >>
> >>> -----Original Message-----
> >>> From: Mark Brown <broonie@kernel.org>
> >>> Sent: Friday, May 22, 2020 4:52 PM
> >>> To: Mukunda, Vijendar <Vijendar.Mukunda@amd.com>
> >>> Cc: Hui Wang <hui.wang@canonical.com>; alsa-devel@alsa-project.org
> >>> Subject: Re: [PATCH v2] ASoC: amd: put off registering mach
> >>> platform_dev to
> >>> avoid -517 err
> >>>
> >>> On Fri, May 22, 2020 at 11:13:43AM +0000, Mukunda, Vijendar wrote:
> >>>
> >>>> Does sound card registration failure at boot time due to modules
> >>>> loading
> >>> order can be considered as bug ?
> >>>
> >>> No, this is totally normal.  If it failed to bind ever then that'd be a
> >>> problem but this is just deferring.
> >> In that case, we don't need this work around I guess.
> >> At maximum during boot time, we may see few sound card registration
> >> failure logs,
> >> Which is normal.
> >>
> >> With this change, our concept of ACP parent device which will create
> >> platform devices
> >> for DMA driver, Generic DMIC driver and Machine driver will be changed.
> >> We implemented same design for Raven I2S driver as well which got
> >> productized.
> >>
> > OK, got it.  It doesn't affect the sound function anyway.
> 
> BTW, so far, I have not seen the -517 error from ubuntu kernel dmesg on
> PC or laptop. Maybe this is the 1st driver to print this error in the
> dmesg on PC or laptop, so I guess it probably confuses the users or our QA.
> 

We have similar design for I2S endpoint which got productized on other OS
variant.
Most of the PC and Laptop comes up with Legacy HD Audio Driver solution.
This is ASoC based driver.
As this failure message only appears during boot time,  Its okay to go ahead.
End user should really worry if sound card is not created even after system
boots up.