linux-kernel - Re: [PATCH] platform/x86: ideapad-laptop: support Fn+R dual-function key

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Date: Mon, 19 Feb 2024 13:32:05 +0100
From: Gergo Koteles <soyer@....hu>
To: 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] platform/x86: ideapad-laptop: support Fn+R
 dual-function key

Hi Ike,

On Mon, 2024-02-19 at 10:39 +0800, Ike Panhc wrote:
> On 2/11/24 06:51, Gergo Koteles wrote:
> > According to the manual, Fn+R adjusts the display refresh rate.
> > Map Fn+R to KEY_DISPLAYTOGGLE.
> > 
> > Signed-off-by: Gergo Koteles <soyer@....hu>
> > ---
> >  drivers/platform/x86/ideapad-laptop.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
> > index 88eefccb6ed2..4c130957f80d 100644
> > --- a/drivers/platform/x86/ideapad-laptop.c
> > +++ b/drivers/platform/x86/ideapad-laptop.c
> > @@ -1091,6 +1091,8 @@ static const struct key_entry ideapad_keymap[] = {
> >  	{ KE_KEY,	0x07 | IDEAPAD_WMI_KEY, { KEY_HELP } },
> >  	{ KE_KEY,	0x0e | IDEAPAD_WMI_KEY, { KEY_PICKUP_PHONE } },
> >  	{ KE_KEY,	0x0f | IDEAPAD_WMI_KEY, { KEY_HANGUP_PHONE } },
> > +	/* Refresh Rate Toggle (Fn+R) */
> > +	{ KE_KEY,	0x10 | IDEAPAD_WMI_KEY, { KEY_DISPLAYTOGGLE } },
> >  	/* Dark mode toggle */
> >  	{ KE_KEY,	0x13 | IDEAPAD_WMI_KEY, { KEY_PROG1 } },
> >  	/* Sound profile switch */
> 
> Acked-by: Ike Panhc <ike.pan@...onical.com>
> 
> BTW on which ideapad we need this patch?
> 

Oh, I somehow missed that. I found it on a Yoga 7 14ARB7.

Newer Yogas and Legions with 60Hz/90Hz displays have this refresh rate
toggle feature.

I'm wondering if this would be worth a new KEY_REFRESH_RATE_TOGGLE
event code? 

KEY_DISPLAYTOGGLE is used to toggle the LCD on/off in other drivers.

What do you think?

Thanks,
Gergo

> Thanks.
> 
> --
> Ike