Re: [PATCH v2 4/4] arm64: dts: qcom: sc7280: Add cpu and llcc BWMON (=> interconnect issue)

[Krzysztof Kozlowski]

On 17/01/2023 18:27, Matthias Kaehlcke wrote:
> 
>>> which would set the initially bandwidths to 0 and determine the actually
>>> needed bandwidth. But since the driver isn't probed the initial
>>> bandwidths stay at INT_MAX.
>>>
>>> This isn't actually an issue with this patch, but how the interconnect
>>> framework deals with devices that are registered on the bus, but aren't
>>> probed (yet). Not sure how this would be best fixed. Georgi, do you have
>>> any ideas?
>>
>> Why the device is not probed (yet)? If it is registered, it will come
>> soon during boot up.
> 
> Because CONFIG_QCOM_ICC_BWMON is not enabled for the board in question (see
> above). It could be enabled as a short term mitigtion, however we shouldn't
> require drivers to be enabled just because the DT has a corresponding node.

It's the same case as with all other interconnect leafs/consumers. The
same behavior if you do not have it enabled, right? If not, I wonder
what is here different?

Best regards,
Krzysztof