linux-kernel - Re: [PATCH 3/3] firmware: arm_scmi: Increase the maximum opp count

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Message-ID: <ZWiHUt-N8GvG5z_O@pluto>
Date:   Thu, 30 Nov 2023 13:00:02 +0000
From:   Cristian Marussi <cristian.marussi@....com>
To:     Sibi Sankar <quic_sibis@...cinc.com>
Cc:     sudeep.holla@....com, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_mdtipton@...cinc.com,
        linux-arm-kernel@...ts.infradead.org, quic_asartor@...cinc.com,
        quic_lingutla@...cinc.com
Subject: Re: [PATCH 3/3] firmware: arm_scmi: Increase the maximum opp count

On Wed, Nov 29, 2023 at 12:27:48PM +0530, Sibi Sankar wrote:
> The number of opps on certain variants of the X1E80100 SoC are greater
> than current maximum, so increase the MAX_OPP count to the next log level
> to accommodate that.
> 

Hi,


> Signed-off-by: Sibi Sankar <quic_sibis@...cinc.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 3344ce3a2026..edf34a3c4d6a 100644
> --- a/drivers/firmware/arm_scmi/perf.c
> +++ b/drivers/firmware/arm_scmi/perf.c
> @@ -24,7 +24,7 @@
>  #include "protocols.h"
>  #include "notify.h"
>  
> -#define MAX_OPPS		16
> +#define MAX_OPPS		24
>

There is an hashtable, opps_by_freq, sized by an ilog2()....

....so, can we stick to a power-of-2 like 32 instead ?
(and be more future proof too...)

Other than this, LGTM

Reviewed-by: Cristian Marussi <cristian.marussi@....com>

Thanks,
Cristian