linux-kernel - Re: [PATCH 1/2] cpufreq/amd-pstate: Add offline, online and suspend callbacks for amd_pstate

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Message-ID: <50b0e014-b359-4762-add5-a4835afd372f@amd.com>
Date: Tue, 15 Apr 2025 09:35:47 -0500
From: Mario Limonciello <mario.limonciello@....com>
To: Dhananjay Ugwekar <dhananjay.ugwekar@....com>, gautham.shenoy@....com
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] cpufreq/amd-pstate: Add offline, online and suspend
 callbacks for amd_pstate_driver

On 4/15/2025 5:21 AM, Dhananjay Ugwekar wrote:
> Rename and use the existing amd_pstate_epp callbacks for amd_pstate driver
> as well. Remove the debug print in online callback while at it.
> 
> These callbacks will be needed to support the "Requested CPU Min Frequency"
> BIOS option.
> 
> Signed-off-by: Dhananjay Ugwekar <dhananjay.ugwekar@....com>

Reviewed-by: Mario Limonciello <mario.limonciello@....com>

> ---
>   drivers/cpufreq/amd-pstate.c | 17 +++++++++--------
>   1 file changed, 9 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
> index c29840ba3b30..02de51001eba 100644
> --- a/drivers/cpufreq/amd-pstate.c
> +++ b/drivers/cpufreq/amd-pstate.c
> @@ -1568,19 +1568,17 @@ static int amd_pstate_epp_set_policy(struct cpufreq_policy *policy)
>   	return 0;
>   }
>   
> -static int amd_pstate_epp_cpu_online(struct cpufreq_policy *policy)
> +static int amd_pstate_cpu_online(struct cpufreq_policy *policy)
>   {
> -	pr_debug("AMD CPU Core %d going online\n", policy->cpu);
> -
>   	return amd_pstate_cppc_enable(policy);
>   }
>   
> -static int amd_pstate_epp_cpu_offline(struct cpufreq_policy *policy)
> +static int amd_pstate_cpu_offline(struct cpufreq_policy *policy)
>   {
>   	return 0;
>   }
>   
> -static int amd_pstate_epp_suspend(struct cpufreq_policy *policy)
> +static int amd_pstate_suspend(struct cpufreq_policy *policy)
>   {
>   	struct amd_cpudata *cpudata = policy->driver_data;
>   
> @@ -1618,6 +1616,9 @@ static struct cpufreq_driver amd_pstate_driver = {
>   	.fast_switch    = amd_pstate_fast_switch,
>   	.init		= amd_pstate_cpu_init,
>   	.exit		= amd_pstate_cpu_exit,
> +	.online		= amd_pstate_cpu_online,
> +	.offline	= amd_pstate_cpu_offline,
> +	.suspend	= amd_pstate_suspend,
>   	.set_boost	= amd_pstate_set_boost,
>   	.update_limits	= amd_pstate_update_limits,
>   	.name		= "amd-pstate",
> @@ -1630,9 +1631,9 @@ static struct cpufreq_driver amd_pstate_epp_driver = {
>   	.setpolicy	= amd_pstate_epp_set_policy,
>   	.init		= amd_pstate_epp_cpu_init,
>   	.exit		= amd_pstate_epp_cpu_exit,
> -	.offline	= amd_pstate_epp_cpu_offline,
> -	.online		= amd_pstate_epp_cpu_online,
> -	.suspend	= amd_pstate_epp_suspend,
> +	.offline	= amd_pstate_cpu_offline,
> +	.online		= amd_pstate_cpu_online,
> +	.suspend	= amd_pstate_suspend,
>   	.resume		= amd_pstate_epp_resume,
>   	.update_limits	= amd_pstate_update_limits,
>   	.set_boost	= amd_pstate_set_boost,