linux-kernel - Re: [PATCH 1/1] firmware: arm_scmi: Increase MAX

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Message-ID: <6af5945e-7d5c-4596-ac42-c5898b4c49b7@oss.qualcomm.com>
Date: Wed, 10 Dec 2025 15:28:37 -0800
From: Vivek Aknurwar <vivek.aknurwar@....qualcomm.com>
To: sudeep.holla@....com, cristian.marussi@....com
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, mike.tipton@....qualcomm.com
Subject: Re: [PATCH 1/1] firmware: arm_scmi: Increase MAX_OPPS to 64

Hello Sudeep/Cristian,

Just following up on this patch. If there’s anything missing or
needs adjustment, please let me know.

Thanks,
Vivek
On 10/14/2025 12:34 AM, Vivek Aknurwar wrote:
> Some upcoming SoCs define more than 32 operating performance points (OPPs),
> exceeding the current SCMI protocol limit. Increase MAX_OPPS to 64
> (next power of 2) to support these configurations.
> 
> Signed-off-by: Vivek Aknurwar <vivek.aknurwar@....qualcomm.com>
> ---
>  drivers/firmware/arm_scmi/perf.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
> index 683fd9b85c5c..2249ef7fe790 100644
> --- a/drivers/firmware/arm_scmi/perf.c
> +++ b/drivers/firmware/arm_scmi/perf.c
> @@ -27,7 +27,7 @@
>  /* Updated only after ALL the mandatory features for that version are merged */
>  #define SCMI_PROTOCOL_SUPPORTED_VERSION		0x40000
>  
> -#define MAX_OPPS		32
> +#define MAX_OPPS		64
>  
>  enum scmi_performance_protocol_cmd {
>  	PERF_DOMAIN_ATTRIBUTES = 0x3,