[alsa-devel] writing an alsa driver

[Pierre-Louis Bossart]

On 3/3/16 5:27 AM, Vinod Koul wrote:
> On Thu, Mar 03, 2016 at 12:11:10PM +0100, Michele Curti wrote:
>> Hi Vinod,
>>
>> On Thu, Jun 25, 2015 at 08:54:07AM +0530, Vinod Koul wrote:
>>>> [    2.700468] sst-mfld-platform sst-mfld-platform: Slot control: codec_in rx deinterleaver codec_in1_1 doesn't have DAPM widget!!!
>>> this is unexpected, I will check on this
>>>
>>>> ...
>>>> [    7.970937] intel_sst_acpi 80860F28:00: Wait timed-out condition:0x0, msg_id:0x1 fw_state 0x3
>>>> [    7.970964] intel_sst_acpi 80860F28:00: fw returned err -16
>>> Yes this is a problem, which FW are you using
>
> Have you tried the recent kernels, Pierre did a bunch of update and got many
> things working.
>
> As for timeout, that simply means we have send a message to DSP which failed
> to get a response. Perhpas the message had some bad element of FW had a
> bug/crashed...

The firmware timeout is due to a change in the BIOS for BYT-CR devices 
that impacts the IPC interrupt number, I have a set of patches that fix 
this on Asus T100TAF but I still can't get any sound out.