linux-kernel - Re: [PATCH] platform/x86: Support for mode FN key

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Message-ID: <729d7887-7681-476b-9b5f-c498d78df2cb@redhat.com>
Date: Mon, 22 Jan 2024 12:28:15 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: Mark Pearson <mpearson-lenovo@...ebb.ca>
Cc: corbet@....net, ilpo.jarvinen@...ux.intel.com,
 platform-driver-x86@...r.kernel.org, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] platform/x86: Support for mode FN key

Hi,

On 1/21/24 00:29, Mark Pearson wrote:
> New Thinkpads have added a 'Mode' Function key that on Windows allows
> you to choose the active profile (low-power, balanced, performance)
> 
> Added suppoort for this hotkey (F8), and have it cycle through the
> options available.
> 
> Tested on X1 Carbon G12.
> 
> Signed-off-by: Mark Pearson <mpearson-lenovo@...ebb.ca>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans



> ---
>  .../admin-guide/laptops/thinkpad-acpi.rst     |  7 ++++++-
>  drivers/platform/x86/thinkpad_acpi.c          | 20 ++++++++++++++++++-
>  2 files changed, 25 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/admin-guide/laptops/thinkpad-acpi.rst b/Documentation/admin-guide/laptops/thinkpad-acpi.rst
> index 98d304010170..7f674a6cfa8a 100644
> --- a/Documentation/admin-guide/laptops/thinkpad-acpi.rst
> +++ b/Documentation/admin-guide/laptops/thinkpad-acpi.rst
> @@ -444,7 +444,9 @@ event	code	Key		Notes
>  
>  0x1008	0x07	FN+F8		IBM: toggle screen expand
>  				Lenovo: configure UltraNav,
> -				or toggle screen expand
> +				or toggle screen expand.
> +				On newer platforms (2024+)
> +				replaced by 0x131f (see below)
>  
>  0x1009	0x08	FN+F9		-
>  
> @@ -504,6 +506,9 @@ event	code	Key		Notes
>  
>  0x1019	0x18	unknown
>  
> +0x131f	...	FN+F8	        Platform Mode change.
> +				Implemented in driver.
> +
>  ...	...	...
>  
>  0x1020	0x1F	unknown
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index c4895e9bc714..ceb22f8d8442 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -166,6 +166,7 @@ enum tpacpi_hkey_event_t {
>  	TP_HKEY_EV_VOL_MUTE		= 0x1017, /* Mixer output mute */
>  	TP_HKEY_EV_PRIVACYGUARD_TOGGLE	= 0x130f, /* Toggle priv.guard on/off */
>  	TP_HKEY_EV_AMT_TOGGLE		= 0x131a, /* Toggle AMT on/off */
> +	TP_HKEY_EV_PROFILE_TOGGLE	= 0x131f, /* Toggle platform profile */
>  
>  	/* Reasons for waking up from S3/S4 */
>  	TP_HKEY_EV_WKUP_S3_UNDOCK	= 0x2304, /* undock requested, S3 */
> @@ -3731,6 +3732,7 @@ static bool hotkey_notify_extended_hotkey(const u32 hkey)
>  	switch (hkey) {
>  	case TP_HKEY_EV_PRIVACYGUARD_TOGGLE:
>  	case TP_HKEY_EV_AMT_TOGGLE:
> +	case TP_HKEY_EV_PROFILE_TOGGLE:
>  		tpacpi_driver_event(hkey);
>  		return true;
>  	}
> @@ -11118,7 +11120,23 @@ static void tpacpi_driver_event(const unsigned int hkey_event)
>  		else
>  			dytc_control_amt(!dytc_amt_active);
>  	}
> -
> +	if (hkey_event == TP_HKEY_EV_PROFILE_TOGGLE) {
> +		switch (dytc_current_profile) {
> +		case PLATFORM_PROFILE_LOW_POWER:
> +			dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
> +			break;
> +		case PLATFORM_PROFILE_BALANCED:
> +			dytc_profile_set(NULL, PLATFORM_PROFILE_PERFORMANCE);
> +			break;
> +		case PLATFORM_PROFILE_PERFORMANCE:
> +			dytc_profile_set(NULL, PLATFORM_PROFILE_LOW_POWER);
> +			break;
> +		default:
> +			pr_warn("Profile HKEY unexpected profile %d", dytc_current_profile);
> +		}
> +		/* Notify user space the profile changed */
> +		platform_profile_notify();
> +	}
>  }
>  
>  static void hotkey_driver_event(const unsigned int scancode)