Re: [RFC V6 0/8] arm_scmi: vendors: Qualcomm Generic Vendor Extensions

On 5/7/2026 2:40 PM, Dmitry Baryshkov wrote:
> On Thu, May 07, 2026 at 11:52:29AM +0530, Sibi Sankar wrote:
>> The QCOM SCMI vendor protocol provides a generic way of exposing a number of
>> Qualcomm SoC specific features (like memory bus scaling) through a mixture of
>> pre-determined algorithm strings and param_id pairs hosted on the SCMI
>> controller. On Qualcomm Glymur and Hamoa SoCs, the memlat governor and the
>> mechanism to control the various caches and ram is hosted on the CPU Control
>> Processor (CPUCP) and the method to tweak and start the governor is exposed
>> through the QCOM SCMI Generic Extension Protocol.
>
> Could you please clarify, does this apply to the common commercial
> Glymur and Hamoa laptops?

Yes, they do apply to common commercial Glymur/Hamoa Laptops
as is. This is the same solution used on the windows side of things
as well. There can be certain cases like Johan has reported earlier
where certain oems are stuck with on older version of CPUCP
which requires a the memlat string to be sent out in lower case
we should be able to handle those as well with overriding those
by using driver data and specific compatibles.

-Sibi

>