Re: [PATCH] cpufreq: CPPC: add autonomous mode boot parameter support

[Sumit Gupta]

On 13/04/26 11:21, Viresh Kumar wrote:
> External email: Use caution opening links or attachments
>
>
> On 10-04-26, 15:47, Pierre Gondois wrote:
> > I need to ping Viresh to check if this is still relevant.
> I think its okay to clear the min/max state in the kernel once and for all if
> you think it is not done nicely. As discussed earlier, try that in a fresh
> series which only does that part.
>
> --
> viresh

Thanks Pierre and Viresh.

In autonomous mode, the min/max_perf HW registers directly control the
frequency range the hardware operates in, so the values programmed in
.init() need to survive through the governor.
I verified this on a platform where lowest_nonlinear_perf != lowest_perf,
the min_perf register ends up at lowest_perf instead of the intended
lowest_nonlinear_perf.
Pierre's QoS seeding patch would fix this.
Happy to test once it's sent.


Thank you,
Sumit Gupta