linux-kernel - Re: [PATCH 4/4] platform/x86: thinkpad_acpi: Support hotkey to disable trackpoint doubletap

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Message-ID: <3f49d41e-649d-4a07-9a1a-301a2f52613c@redhat.com>
Date: Mon, 8 Apr 2024 15:13:05 +0200
From: Hans de Goede <hdegoede@...hat.com>
To: Mark Pearson <mpearson-lenovo@...ebb.ca>
Cc: ilpo.jarvinen@...ux.intel.com, hmh@....eng.br, dmitry.torokhov@...il.com,
 ibm-acpi-devel@...ts.sourceforge.net, platform-driver-x86@...r.kernel.org,
 linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
 njoshi1@...ovo.com, vsankar@...ovo.com, peter.hutterer@...hat.com
Subject: Re: [PATCH 4/4] platform/x86: thinkpad_acpi: Support hotkey to
 disable trackpoint doubletap

Hi,

On 3/24/24 10:08 PM, Mark Pearson wrote:
> The hotkey combination FN+G can be used to disable the trackpoint
> doubletap feature on Windows.
> Add matching functionality for Linux.
> 
> Signed-off-by: Mark Pearson <mpearson-lenovo@...ebb.ca>
> Signed-off-by: Vishnu Sankar <vsankar@...ovo.com>
> ---
>  drivers/platform/x86/thinkpad_acpi.c | 24 +++++++++++++++++-------
>  1 file changed, 17 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index 854ce971bde2..21756aa3d28d 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -167,6 +167,7 @@ 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_DOUBLETAP_TOGGLE	= 0x131c, /* Toggle trackpoint doubletap on/off */
>  	TP_HKEY_EV_PROFILE_TOGGLE	= 0x131f, /* Toggle platform profile */
>  
>  	/* Reasons for waking up from S3/S4 */
> @@ -354,6 +355,7 @@ static struct {
>  	u32 hotkey_poll_active:1;
>  	u32 has_adaptive_kbd:1;
>  	u32 kbd_lang:1;
> +	u32 trackpoint_doubletap:1;
>  	struct quirk_entry *quirks;
>  } tp_features;
>  
> @@ -3598,6 +3600,9 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
>  
>  	hotkey_poll_setup_safe(true);
>  
> +	/* Enable doubletap by default */
> +	tp_features.trackpoint_doubletap = 1;
> +
>  	return 0;
>  }
>  
> @@ -3739,6 +3744,7 @@ static bool hotkey_notify_extended_hotkey(const u32 hkey)
>  	case TP_HKEY_EV_PRIVACYGUARD_TOGGLE:
>  	case TP_HKEY_EV_AMT_TOGGLE:
>  	case TP_HKEY_EV_PROFILE_TOGGLE:
> +	case TP_HKEY_EV_DOUBLETAP_TOGGLE:
>  		tpacpi_driver_event(hkey);
>  		return true;
>  	}
> @@ -4092,13 +4098,15 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
>  				send_acpi_ev = true;
>  				ignore_acpi_ev = false;
>  				known_ev = true;
> -				/* Send to user space */
> -				mutex_lock(&tpacpi_inputdev_send_mutex);
> -				input_report_key(tpacpi_inputdev, KEY_DOUBLECLICK, 1);
> -				input_sync(tpacpi_inputdev);
> -				input_report_key(tpacpi_inputdev, KEY_DOUBLECLICK, 0);
> -				input_sync(tpacpi_inputdev);
> -				mutex_unlock(&tpacpi_inputdev_send_mutex);
> +				if (tp_features.trackpoint_doubletap) {
> +					/* Send to user space */
> +					mutex_lock(&tpacpi_inputdev_send_mutex);
> +					input_report_key(tpacpi_inputdev, KEY_DOUBLECLICK, 1);
> +					input_sync(tpacpi_inputdev);
> +					input_report_key(tpacpi_inputdev, KEY_DOUBLECLICK, 0);
> +					input_sync(tpacpi_inputdev);
> +					mutex_unlock(&tpacpi_inputdev_send_mutex);
> +				}
>  				break;
>  			}
>  			fallthrough;	/* to default */

This chunk will need to change after incorporating my review comments into
patch 2/4. With that said this looks good to me:

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

Regards,

Hans


> @@ -11228,6 +11236,8 @@ static void tpacpi_driver_event(const unsigned int hkey_event)
>  		/* Notify user space the profile changed */
>  		platform_profile_notify();
>  	}
> +	if (hkey_event == TP_HKEY_EV_DOUBLETAP_TOGGLE)
> +		tp_features.trackpoint_doubletap = !tp_features.trackpoint_doubletap;
>  }
>  
>  static void hotkey_driver_event(const unsigned int scancode)