linux-kernel - Re: [PATCH v2 4/8] platform/x86: asus-wmi: add WMI method to show if egpu connected

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Message-ID: <611e5609-3013-7ac7-efd8-af41431aa2be@redhat.com>
Date:   Wed, 12 Jul 2023 16:43:12 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     "Luke D. Jones" <luke@...nes.dev>
Cc:     corentin.chary@...il.com, acpi4asus-user@...ts.sourceforge.net,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hwmon@...r.kernel.org, markgross@...nel.org,
        jdelvare@...e.com, linux@...ck-us.net
Subject: Re: [PATCH v2 4/8] platform/x86: asus-wmi: add WMI method to show if
 egpu connected

Hi,

On 6/30/23 07:35, Luke D. Jones wrote:
> Exposes the WMI method which tells if the eGPU is properly connected
> on the devices that support it.
> 
> Signed-off-by: Luke D. Jones <luke@...nes.dev>

Thanks, patch looks good to me:

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

Regards,

Hans


> ---
>  .../ABI/testing/sysfs-platform-asus-wmi       | 11 +++++++++-
>  drivers/platform/x86/asus-wmi.c               | 21 +++++++++++++++++++
>  include/linux/platform_data/x86/asus-wmi.h    |  4 +++-
>  3 files changed, 34 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/ABI/testing/sysfs-platform-asus-wmi b/Documentation/ABI/testing/sysfs-platform-asus-wmi
> index eb29e3023c7b..878daf7c2036 100644
> --- a/Documentation/ABI/testing/sysfs-platform-asus-wmi
> +++ b/Documentation/ABI/testing/sysfs-platform-asus-wmi
> @@ -107,4 +107,13 @@ Description:
>  		Get the current charging mode being used:
>  			* 1 - Barrel connected charger,
>  			* 2 - USB-C charging
> -			* 3 - Both connected, barrel used for charging
> \ No newline at end of file
> +			* 3 - Both connected, barrel used for charging
> +
> +What:		/sys/devices/platform/<platform>/egpu_connected
> +Date:		Jun 2023
> +KernelVersion:	6.5
> +Contact:	"Luke Jones" <luke@...nes.dev>
> +Description:
> +		Show if the egpu (XG Mobile) is correctly connected:
> +			* 0 - False,
> +			* 1 - True
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index fb27218e51cf..0c8a4a46b121 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -243,6 +243,7 @@ struct asus_wmi {
>  
>  	bool charge_mode_available;
>  	bool egpu_enable_available;
> +	bool egpu_connect_available;
>  	bool dgpu_disable_available;
>  	bool gpu_mux_mode_available;
>  
> @@ -709,6 +710,22 @@ static ssize_t egpu_enable_store(struct device *dev,
>  }
>  static DEVICE_ATTR_RW(egpu_enable);
>  
> +/* Is eGPU connected? *********************************************************/
> +static ssize_t egpu_connected_show(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct asus_wmi *asus = dev_get_drvdata(dev);
> +	int result;
> +
> +	result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_EGPU_CONNECTED);
> +	if (result < 0)
> +		return result;
> +
> +	return sysfs_emit(buf, "%d\n", result);
> +}
> +
> +static DEVICE_ATTR_RO(egpu_connected);
> +
>  /* gpu mux switch *************************************************************/
>  static ssize_t gpu_mux_mode_show(struct device *dev,
>  				 struct device_attribute *attr, char *buf)
> @@ -3645,6 +3662,7 @@ static struct attribute *platform_attributes[] = {
>  	&dev_attr_touchpad.attr,
>  	&dev_attr_charge_mode.attr,
>  	&dev_attr_egpu_enable.attr,
> +	&dev_attr_egpu_connected.attr,
>  	&dev_attr_dgpu_disable.attr,
>  	&dev_attr_gpu_mux_mode.attr,
>  	&dev_attr_lid_resume.attr,
> @@ -3677,6 +3695,8 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
>  		ok = asus->charge_mode_available;
>  	else if (attr == &dev_attr_egpu_enable.attr)
>  		ok = asus->egpu_enable_available;
> +	else if (attr == &dev_attr_egpu_connected.attr)
> +		ok = asus->egpu_connect_available;
>  	else if (attr == &dev_attr_dgpu_disable.attr)
>  		ok = asus->dgpu_disable_available;
>  	else if (attr == &dev_attr_gpu_mux_mode.attr)
> @@ -3943,6 +3963,7 @@ static int asus_wmi_add(struct platform_device *pdev)
>  
>  	asus->charge_mode_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_CHARGE_MODE);
>  	asus->egpu_enable_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_EGPU);
> +	asus->egpu_connect_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_EGPU_CONNECTED);
>  	asus->dgpu_disable_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_DGPU);
>  	asus->gpu_mux_mode_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_GPU_MUX);
>  	asus->kbd_rgb_mode_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_TUF_RGB_MODE);
> diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
> index 329efc086993..2034648f8cdf 100644
> --- a/include/linux/platform_data/x86/asus-wmi.h
> +++ b/include/linux/platform_data/x86/asus-wmi.h
> @@ -100,7 +100,9 @@
>  /* Charging mode - 1=Barrel, 2=USB */
>  #define ASUS_WMI_DEVID_CHARGE_MODE	0x0012006C
>  
> -/* dgpu on/off */
> +/* epu is connected? 1 == true */
> +#define ASUS_WMI_DEVID_EGPU_CONNECTED	0x00090018
> +/* egpu on/off */
>  #define ASUS_WMI_DEVID_EGPU		0x00090019
>  
>  /* dgpu on/off */