[alsa-devel] [PATCH v2 0/5] ASoC: Intel: ACPI support and machines

[Vinod Koul]

On Wed, Nov 05, 2014 at 09:49:35AM +0200, Jarkko Nikula wrote:
> On 11/04/2014 01:15 PM, Mark Brown wrote:
> >>Ok, so firmware appears to works on other than CR Baytrails too. Is it
> >>available in linux-firmware since if it's not when changing the platform
> >>drivers there will be obvious regressions to users?
> >Can we take a step back here: what are the firmwares and hardware
> >platforms we're talking about here?
> 
> Only Baytrail and its variants. Current upstreamed drivers use
> "intel/fw_sst_0f28.bin-48kHz_i2s_master" but that FW doesn't have as
> much features like compressed audio and is not compatible with the
> one Vinod's team is upstreaming.
> 
> Goal is to switch to new implementation since it covers more
> platforms but do switchover as seamlessly as possible for Baytrail.
> Problem at the moment for Baytrail that both current and new drivers
> probe using the same ACPIIDs and FW for new drivers is not yet in
> linux-firmware.
Shouldn't that be okay, as user wouldn't select the new driver. Default is n :)

Only when driver is stable and verfied by users should we enable this and
then start removing older driver

-- 
~Vinod
> 
> >
> >>Well, those audio routing differences require to have DMI quirks. E.g. T100
> >>has analogue internal mic, Dell Venue 8 Pro 5830 has digital mic connected
> >>to DMIC2 of the RT564x and some have it connected to DMIC1.
> >Are any of these things on sale at the minute?  Looks like T100 and the
> >Dell both are but I'm not sure if they're current or previous models.
> 
> T100 and Dell are. Third known audio routing difference is used in
> reference design so I guess that setup is found on some models too.
> Then there are byt-max98090 based Chromebooks that use current
> drivers and FW.
> 
> -- 
> Jarkko

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