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Date:   Fri, 18 Sep 2020 00:29:34 +0200
From:   Samuel =?utf-8?B?xIxhdm9q?= <samuel@cavoj.net>
To:     mark gross <mgross@linux.intel.com>
Cc:     Darren Hart <dvhart@infradead.org>,
        Andy Shevchenko <andy@infradead.org>,
        Corentin Chary <corentin.chary@gmail.com>,
        platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org,
        Hans de Goede <hdegoede@redhat.com>
Subject: Re: [PATCH] platform/x86: asus-wmi: Add support for SW_TABLET_MODE
 on UX360
Message-ID: <20200917222934.syf5aqgkq5zurq2g@fastboi.localdomain>
References: <20200916191232.1020318-1-samuel@cavoj.net>
 <20200917215606.GF29136@mtg-dev.jf.intel.com>
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On 17.09.2020 14:56, mark gross wrote:
> On Wed, Sep 16, 2020 at 09:12:33PM +0200, Samuel Čavoj wrote:
> > The UX360CA has a WMI device id 0x00060062, which reports whether the
> > lid is flipped in tablet mode (1) or in normal laptop mode (0).
> > 
> > This commit adds a quirk (quirk_asus_use_lid_flip_devid) for devices on
> > which this WMI device should be used to figure out the SW_TABLET_MODE
> > state, as opposed to the quirk_asus_use_kbd_dock_devid.
> see Documentation/process/submitting-patches.rst
> section2  the bit about "imperative mood".

Thanks, I will keep that in mind going forward. I don't believe it's
worth submitting a v3 at this point?

Regards,
Samuel

> > 
> > It is assumed other UX360* models have the same WMI device. As such, the
> > quirk is applied to devices with DMI_MATCH(DMI_PRODUCT_NAME, "UX360").
> > More devices with this feature need to be tested and added accordingly.
> > 
> > The reason for using a whitelist via the quirk mechanism is that the new
> > WMI device (0x00060062) is also present on some models which do not have
> > a 360 degree hinge (at least FX503VD and GL503VD from Hans' DSTS
> > collection) and therefore its presence cannot be relied on.
> > 
> > This patch is a followup to "platform/x86: asus-wmi: Fix SW_TABLET_MODE
> > always reporting 1 on many different models" by Hans de Goede.
> > 
> > Signed-off-by: Samuel Čavoj <samuel@cavoj.net>
> > Cc: Hans de Goede <hdegoede@redhat.com>
> > ---
> >  drivers/platform/x86/asus-nb-wmi.c         | 14 +++++++++++++
> >  drivers/platform/x86/asus-wmi.c            | 23 ++++++++++++++++++++++
> >  drivers/platform/x86/asus-wmi.h            |  1 +
> >  include/linux/platform_data/x86/asus-wmi.h |  1 +
> >  4 files changed, 39 insertions(+)
> > 
> > diff --git a/drivers/platform/x86/asus-nb-wmi.c b/drivers/platform/x86/asus-nb-wmi.c
> > index 345bd224494b..ae5501e07712 100644
> > --- a/drivers/platform/x86/asus-nb-wmi.c
> > +++ b/drivers/platform/x86/asus-nb-wmi.c
> > @@ -119,6 +119,10 @@ static struct quirk_entry quirk_asus_use_kbd_dock_devid = {
> >  	.use_kbd_dock_devid = true,
> >  };
> >  
> > +static struct quirk_entry quirk_asus_use_lid_flip_devid = {
> > +	.use_lid_flip_devid = true,
> > +};
> > +
> >  static int dmi_matched(const struct dmi_system_id *dmi)
> >  {
> >  	pr_info("Identified laptop model '%s'\n", dmi->ident);
> > @@ -520,6 +524,16 @@ static const struct dmi_system_id asus_quirks[] = {
> >  		},
> >  		.driver_data = &quirk_asus_use_kbd_dock_devid,
> >  	},
> > +	{
> > +		.callback = dmi_matched,
> > +		.ident = "ASUS ZenBook Flip UX360",
> > +		.matches = {
> > +			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
> > +			/* Match UX360* */
> > +			DMI_MATCH(DMI_PRODUCT_NAME, "UX360"),
> > +		},
> > +		.driver_data = &quirk_asus_use_lid_flip_devid,
> > +	},
> >  	{},
> >  };
> >  
> > diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> > index ae6289d37faf..a628a7d9e066 100644
> > --- a/drivers/platform/x86/asus-wmi.c
> > +++ b/drivers/platform/x86/asus-wmi.c
> > @@ -63,6 +63,7 @@ MODULE_LICENSE("GPL");
> >  #define NOTIFY_KBD_BRTTOGGLE		0xc7
> >  #define NOTIFY_KBD_FBM			0x99
> >  #define NOTIFY_KBD_TTP			0xae
> > +#define NOTIFY_LID_FLIP			0xfa
> >  
> >  #define ASUS_WMI_FNLOCK_BIOS_DISABLED	BIT(0)
> >  
> > @@ -375,6 +376,18 @@ static int asus_wmi_input_init(struct asus_wmi *asus)
> >  		}
> >  	}
> >  
> > +	if (asus->driver->quirks->use_lid_flip_devid) {
> > +		result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_LID_FLIP);
> > +		if (result >= 0) {
> > +			input_set_capability(asus->inputdev, EV_SW, SW_TABLET_MODE);
> > +			input_report_switch(asus->inputdev, SW_TABLET_MODE, result);
> > +		} else if (result == -ENODEV) {
> > +			pr_err("This device has lid_flip quirk but got ENODEV checking it. This is a bug.");
> > +		} else {
> > +			pr_err("Error checking for lid-flip: %d\n", result);
> > +		}
> > +	}
> > +
> >  	err = input_register_device(asus->inputdev);
> >  	if (err)
> >  		goto err_free_dev;
> > @@ -2127,6 +2140,16 @@ static void asus_wmi_handle_event_code(int code, struct asus_wmi *asus)
> >  		return;
> >  	}
> >  
> > +	if (asus->driver->quirks->use_lid_flip_devid && code == NOTIFY_LID_FLIP) {
> > +		result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_LID_FLIP);
> > +
> > +		if (result >= 0) {
> > +			input_report_switch(asus->inputdev, SW_TABLET_MODE, result);
> > +			input_sync(asus->inputdev);
> > +		}
> > +		return;
> > +	}
> > +
> >  	if (asus->fan_boost_mode_available && code == NOTIFY_KBD_FBM) {
> >  		fan_boost_mode_switch_next(asus);
> >  		return;
> > diff --git a/drivers/platform/x86/asus-wmi.h b/drivers/platform/x86/asus-wmi.h
> > index 1a95c172f94b..b302415bf1d9 100644
> > --- a/drivers/platform/x86/asus-wmi.h
> > +++ b/drivers/platform/x86/asus-wmi.h
> > @@ -34,6 +34,7 @@ struct quirk_entry {
> >  	bool wmi_backlight_set_devstate;
> >  	bool wmi_force_als_set;
> >  	bool use_kbd_dock_devid;
> > +	bool use_lid_flip_devid;
> >  	int wapf;
> >  	/*
> >  	 * For machines with AMD graphic chips, it will send out WMI event
> > diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
> > index 897b8332a39f..2f274cf52805 100644
> > --- a/include/linux/platform_data/x86/asus-wmi.h
> > +++ b/include/linux/platform_data/x86/asus-wmi.h
> > @@ -62,6 +62,7 @@
> >  
> >  /* Misc */
> >  #define ASUS_WMI_DEVID_CAMERA		0x00060013
> > +#define ASUS_WMI_DEVID_LID_FLIP		0x00060062
> >  
> >  /* Storage */
> >  #define ASUS_WMI_DEVID_CARDREADER	0x00080013
> > -- 
> > 2.28.0
> >