[alsa-devel] Broken IRQs on BayTrail devices

[Pierre-Louis Bossart]

On 4/24/16 9:51 PM, Joel Holdsworth wrote:
> Dear All,
>
> I've been working on a kernel patch for a firmware IRQ quirk issue that
> affects multiple Intel Atom Bay-Trail boards:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=117141
>
> If you have a Bay Trail device with non-functioning sound, can you
> attach the DSDT and dmidecode output to the bug so I can investigate
> whether the quirk affect your device.

The IRQ fix is not enough to get sound on Baytrail-CR devices. You need 
to also swap SSP2 with SSP0 due to a package change, which is not 
supported with the 'older' byt-rt5640 driver so that's a dead-end - 
sorry. There are Intel patching coming for the bytcr-rt5640 to model all 
the possible routing and quirks, stay tuned.