[PATCH v2 2/2] arm64: dts: rockchip: Add rk3528 QoS register node

[Jonas Karlman]

On 2025-03-06 19:08, Heiko Stübner wrote:
> Am Donnerstag, 6. März 2025, 17:55:16 MEZ schrieb Jonas Karlman:
>> Hi Chukun,
>>
>> On 2025-03-06 13:38, Chukun Pan wrote:
>>> The Quality-of-Service (QsS) node stores/restores specific
>>> register contents when the power domains is turned off/on.
>>> Add QoS node so that they can connect to the power domain.
>>>
>>> Signed-off-by: Chukun Pan <amadeus at jmu.edu.cn>
>>> ---
>>>  arch/arm64/boot/dts/rockchip/rk3528.dtsi | 160 +++++++++++++++++++++++
>>>  1 file changed, 160 insertions(+)
>>>
> 
>>
>> These QoS node are typically referenced from power domains so that the
>> PMU driver know what QoS to save/restore when a power domain is power
>> cycled.
>>
>> Vendor kernel only reference the two qos_gpu nodes in it's power domains,
>> do you have any documentation or knowledge about what power domain the
>> remaining QoS are related to?
> 
> I think the GPU actually is the _only_ fully switchable power-domain on the
> rk3528. The other powerdomains seem to be always on, but can do this
> idle-request thing.
> 
> At least that is what I'm reading from the pm-domain definitions in the
> vendor-kernel, combined with a look at the pmu section of the rk3528 TRM.

Thanks for this information.

Regards,
Jonas

> 
> 
> Heiko
> 
>