[alsa-devel] Cherry trail and Nau 88l24 codec

[Pierre-Louis Bossart]

On 12/2/16 7:16 PM, Joseph Wang wrote:
> Hi all,
>
> I've been trying to get sound working on my W9S pipo device.  The people
> at Nuvoton have been extraordinarily helpful, but now the issue is
> writing the machine driver.
>
> My work is at
>
> https://github.com/joequant/nau8824
>
> I've gotten the drivers to load, but getting timeouts with the firmware....
>
> [  102.447840] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0,
> msg_id:0x2 fw_state 0x3
> [  102.447872] intel_sst_acpi 808622A8:00: fw returned err -16
> [  103.471448] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0,
> msg_id:0x2 fw_state 0x3
>
> and then
>
> [  116.820782] intel_sst_acpi 808622A8:00: fw returned err -16
> [  116.938921] intel_sst_acpi 808622A8:00: FW sent error response 0x5000e
> [  116.939065] intel_sst_acpi 808622A8:00: FW sent error response 0x5000e
> [  116.939579] intel_sst_acpi 808622A8:00: FW sent async error msg:
> [  116.939614] (null)00040021 00000000
> [  116.939685] (null)00040021 00000000
> [  116.953260] sst-mfld-platform sst-mfld-platform: Enter: enable=1
> port_name=ssp2-port
> [  116.953704] intel_sst_acpi 808622A8:00: Alloc for str 3 pipe 0xe
> [  116.954062] sst-mfld-sst-mfld-platform: SET_SWM cmd max inputs reached

Just a wild guess: this looks the communication with the DSP isn't 
working and the messages look similar to what we saw with Baytrail-CR 
where a BIOS genius decided to swap the order of interrupt resources.

Can you share the DSDT (on a pastebin, not as attachment) so that we can 
compare the BIOS information for the DSP with known and working 
configurations.

>
> One other path is that ICube has gotten this codec to work on their
> iwork8 Ultimate android device.  They are required to release the source
> under GPL2, but haven't done so, so if all else fails, it will be a
> matter of tracking down someone in that company and explaining the
> issues to them.  Since I'm in Hong Kong, I might just find where the
> things are manufactured, and just show up at their office.
>
> But it appears that there are some "magic bits" that are missing.  One
> question that I have is what is the proper DAI to use (i.e. PCM or I2S)
> for cherry trail.  The second question is that looking at the windows
> driver for nau88l24, there appears to be a test mode that runs the
> driver against a Realtek rt5645.  Should I assume that this means that
> the initialization is similar?
>
> Also I'm quite interested in getting this to work.  The W9S Pipo is a
> perfect netbook that has a big screen that is half the weight of my old
> laptop.  The big thing is that someone realized that instead of putting
> in a SATA hard disk, that they can use an SD card as main storage, and
> that cuts down on the weight.
>