linux-kernel - Re: [PATCH v3] platform/x86: ideapad-laptop: switch platform profiles using thermal management key

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Date: Thu, 4 Apr 2024 15:27:36 +0200
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: Gergo Koteles <soyer@....hu>, Ike Panhc <ike.pan@...onical.com>,
 Hans de Goede <hdegoede@...hat.com>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] platform/x86: ideapad-laptop: switch platform profiles
 using thermal management key

On 04/04/2024 15:10, Gergo Koteles wrote:
> Ideapad laptops have thermal management or performance mode switch key
> (Fn + Q). They report KEY_PROG4.
> 
> If supported, cycle platform profiles instead.
> 
> Tested on Yoga7 14ARB7.
> 
> Signed-off-by: Gergo Koteles <soyer@....hu>
> ---
> Changes in v3:
>   - add dytc_profile_cycle function
> Changes in v2:
>   - only switch platform profiles if supported, otherwise keep the
>     behavior.
> 
> [2]: https://lore.kernel.org/all/797884d8cab030d3a2b656dba67f3c423cc58be7.1712174794.git.soyer@irl.hu/
> [1]: https://lore.kernel.org/all/85254ce8e87570c05e7f04d6507701bef954ed75.1712149429.git.soyer@irl.hu/
> ---
>   drivers/platform/x86/ideapad-laptop.c | 31 +++++++++++++++++++++++++--
>   1 file changed, 29 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
> index 901849810ce2..c7ea3ed14aba 100644
> --- a/drivers/platform/x86/ideapad-laptop.c
> +++ b/drivers/platform/x86/ideapad-laptop.c
> @@ -858,6 +858,30 @@ static void dytc_profile_refresh(struct ideapad_private *priv)
>   	}
>   }
>   
> +static void dytc_profile_cycle(struct ideapad_private *priv)
> +{
> +	switch (priv->dytc->current_profile) {
> +	case PLATFORM_PROFILE_LOW_POWER:
> +		dytc_profile_set(&priv->dytc->pprof,
> +				 PLATFORM_PROFILE_BALANCED);
> +		break;
> +	case PLATFORM_PROFILE_BALANCED:
> +		dytc_profile_set(&priv->dytc->pprof,
> +				 PLATFORM_PROFILE_PERFORMANCE);
> +		break;
> +	case PLATFORM_PROFILE_PERFORMANCE:
> +		dytc_profile_set(&priv->dytc->pprof,
> +				 PLATFORM_PROFILE_LOW_POWER);
> +		break;
> +	default:
> +		dev_warn(&priv->platform_device->dev,
> +			 "Unexpected platform profile %d",
> +			 priv->dytc->current_profile);
> +	}
> +	/* Notify user space the profile changed */
> +	platform_profile_notify();
> +}

Cycling is done through modulo.

Quick and dirty example:

static int profiles[] = {
	PLATFORM_PROFILE_LOW_POWER,
	PLATFORM_PROFILE_BALANCED,
	PLATFORM_PROFILE_PERFORMANCE
};

static int current_profile_index = 0;

static void dytc_profile_cycle(struct ideapad_private *priv)
{
	current_profile_index++

	current_profile_index =
		current_profile_index % ARRAY_SIZE(profiles);

	dytc_profile_set(&priv->dytc->pprof,
			profiles[current_profile_index]);

	platform_profile_notify();
}


>   static const struct dmi_system_id ideapad_dytc_v4_allow_table[] = {
>   	{
>   		/* Ideapad 5 Pro 16ACH6 */
> @@ -1181,8 +1205,11 @@ static void ideapad_check_special_buttons(struct ideapad_private *priv)
>   		switch (bit) {
>   		case 6:	/* Z570 */
>   		case 0:	/* Z580 */
> -			/* Thermal Management button */
> -			ideapad_input_report(priv, 65);
> +			/* Thermal Management / Performance Mode button */
> +			if (priv->dytc)
> +				dytc_profile_cycle(priv);
> +			else
> +				ideapad_input_report(priv, 65);
>   			break;
>   		case 1:
>   			/* OneKey Theater button */
> 
> base-commit: 39cd87c4eb2b893354f3b850f916353f2658ae6f

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