[Sound-open-firmware] Using the Qemu DSP emulator

[Daniel Baluta]

On Fri, Jan 26, 2018 at 6:24 PM, Liam Girdwood
<liam.r.girdwood at linux.intel.com> wrote:
> On Fri, 2018-01-26 at 17:54 +0200, Daniel Baluta wrote:
>> Hi Liam,
>>
>> Thanks a lot for your answer. Still one question inline:
>>
>> On Fri, Jan 26, 2018 at 4:07 PM, Liam Girdwood
>> <liam.r.girdwood at linux.intel.com> wrote:
>> > On Fri, 2018-01-26 at 15:42 +0200, Daniel Baluta wrote:
>> > > Hi,
>> > >
>> > > I'm following the instruction on SOF wiki page on how to use the
>> > > emulator [1]
>> > > and both VM0 and VM1 are up, anyhow SOF DSP device isn't probed.
>> > >
>> > > How do you do it in your qemu setup?
>> >
>> > So for host VM I usually install my favourite distro on a disk image
>> > and boot this image (including kernel) directly using the x86-host.sh
>> > scripts. There are quite a lot of tools that can help create this
>> > image, but it's bog standard Linux VM image with your custom kernel.
>> >
>> > Btw, the kernel can be updated on this image using the normal methods
>> > within the VM.
>>
>>
>> So, I think I have setup everything correct (btw I use SOF modules
>> builtin in the kernel image, because I find it easier).
>
> I recommend modules as the drivers need a mounted FS to load firmware
> and topologies. built-in can result in some races between driver and FS
> being ready....
>
>>
>> Anyhow, I expect that the function sof_probe from sound/soc/sof/core.c
>> to be called but it isn't :).
>>
>> Any idea why?
>
>
> I assume the ACPI device is registered ? Pls check sysfs and make sure
> the device ID is listed with the other ACPI devices and returns status
> 15.
>
> Also pls check that the older SST drivers have not been loaded by
> default. If so, they can be blacklisted atm :-
>
> cat /etc/modprobe.d/blacklist-dsp.conf
> blacklist snd_soc_sst_acpi
> blacklist snd_soc_sst_dsp
> blacklist snd_soc_sst_firmware
> blacklist snd_soc_sst_ipc
> blacklist snd_soc_sst_match
> blacklist snd_soc_sst_mfld-platform
> blacklist snd_soc_skl
> blacklist snd_hda_intel
> blacklist snd_soc_sst_byt_cht_nocodec
> blacklist snd_soc_sst_atom_hifi2_platform
> blacklist snd_intel_sst_core
> blacklist snd_intel_sst_acpi

Yes, this is the reason :) And it is even written on the wiki.

Sorry for the noise. It works now.

thanks,
Daniel.