Re: [PATCH 2/4] ARM: dts: am437x: Move l4 child devices to probe them with ti-sysc

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On 05/12/2018 1.18, Tony Lindgren wrote:
> * Tony Lindgren <tony@xxxxxxxxxxx> [181204 18:11]:
>> * Peter Ujfalusi <peter.ujfalusi@xxxxxx> [181204 12:22]:
>>> Hi Tony,
>>>
>>> On 25/09/2018 3.05, Tony Lindgren wrote:
>>>> With l4 interconnect hierarchy and ti-sysc interconnect target module
>>>> data in place, we can simply move all the related child devices to
>>>> their proper location and enable probing using ti-sysc.
>>>>
>>>> In general the first child device address range starts at range 0
>>>> from the ti-sysc interconnect target so the move involves adjusting
>>>> the child device reg properties for that.
>>>>
>>>> In case of any regressions, problem devices can be reverted to probe
>>>> with legacy platform data as needed by moving them back and removing
>>>> the related interconnect target module node.
>>>>
>>>> Note that we are not yet moving dss or wkup_m3, those will be moved
>>>> later after some related driver changes.
>>>
>>> Exactly the same issue as with am335x after:
>>> ARM: dts: am335x: Move l4 child devices to probe them with ti-sysc
>>>
>>> reverting this patch makes audio working:
>>>
>>> Without revert the McASP FIFO would constantly underflow.
>>>
>>> Memcpy test via dmatest works with EDMA
>>
>> OK I should be able to debug it here with am437x-sk-evm then.
>>
>> If it's not immediately obvious what's going on, let's just
>> do a revert here too and debug it more separately.
> 
> I did not have any luck getting mcasp working on am437x-sk-evm.
> 
> After applying " drm/omap: fix bus_flags for panel-dpi" LCD
> works again. But modprobe of snd-soc-davinci-mcasp and
> snd-soc-tlv320aic3x still does not show anything with aplay -l.

Hrm, why they are not loaded automatically?

> Do I need some other patch or codec driver?

snd-soc-edma
snd-soc-davinci-mcasp
snd-soc-tlv320aic3x
snd-soc-simple-card

at the bottom of the stack is needed, but I just build them in for
convenience.

> 
> Regards,
> 
> Tony
> 

- Péter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
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