On Tue, 15 Sep 2026, Denis Benato wrote:

> 
> On 9/15/26 22:38, Ilpo Järvinen wrote:
> > On Mon, 10 Aug 2026, busybox11 via B4 Relay wrote:
> >
> >> From: busybox11 <busybox11th@gmail.com>
> >>
> >> Newer ASUS ProArt laptops (e.g. H7606 series) implement dGPU power
> >> control on WMI DEVID 0x00090120 instead of the usual 0x00090020.
> >> The default DEVID returns 0xFFFFFFFE on these models, so the
> >> dgpu_disable firmware attribute is never created and the dGPU cannot
> >> be re-enabled from Linux at all.
> >>
> >> Add a fallback probe for device ID 0x00090120 following the same
> >> approach as the gpu_mux_dev_id probe.
> >>
> >> Details for 0x00090120 (confirmed on H7606W using direct WMNB calls
> >> and inspecting the DSDT DEVS handler):
> >>   - Reading DSTS returns 0x00010001 when the dGPU is off (CUMA=1),
> >> 	or 0x00010000 when it's on.
> >>   - Writing DEVS: 0 enables the dGPU (calls PG00._ON() + Notifies
> >> 	PEGP, Device Check), and 1 disables or ejects it.
> >>
> >> This behavior matches the dgpu_disable attribute (1 = disabled).
> >>
> >> Signed-off-by: busybox11 <busybox11th@gmail.com>
> > Unfortunately, we cannot accept anonymous or pseudonym signed 
> > contributions so please sign off with your real name. For more 
> > information about signing of patches, please see:
> >
> > Documentation/process/submitting-patches.rst
> >
> >> ---
> >>  drivers/platform/x86/asus-armoury.c        | 32 +++++++++++++++++++++++++-----
> >>  include/linux/platform_data/x86/asus-wmi.h |  3 +++
> >>  2 files changed, 30 insertions(+), 5 deletions(-)
> >>
> >> diff --git a/drivers/platform/x86/asus-armoury.c b/drivers/platform/x86/asus-armoury.c
> >> index 495dc1e31..f39b52451 100644
> >> --- a/drivers/platform/x86/asus-armoury.c
> >> +++ b/drivers/platform/x86/asus-armoury.c
> >> @@ -93,6 +93,7 @@ struct asus_armoury_priv {
> >>  
> >>  	u32 mini_led_dev_id;
> >>  	u32 gpu_mux_dev_id;
> >> +	u32 dgpu_disable_dev_id;
> >>  };
> >>  
> >>  static struct asus_armoury_priv asus_armoury = {
> >> @@ -452,8 +453,8 @@ static ssize_t gpu_mux_mode_current_value_store(struct kobject *kobj,
> >>  	if (err)
> >>  		return err;
> >>  
> >> -	if (armoury_has_devstate(ASUS_WMI_DEVID_DGPU)) {
> >> -		err = armoury_get_devstate(NULL, &result, ASUS_WMI_DEVID_DGPU);
> >> +	if (asus_armoury.dgpu_disable_dev_id) {
> >> +		err = armoury_get_devstate(NULL, &result, asus_armoury.dgpu_disable_dev_id);
> >>  		if (err)
> >>  			return err;
> >>  		if (result && !optimus) {
> >> @@ -507,7 +508,8 @@ static ssize_t dgpu_disable_current_value_store(struct kobject *kobj,
> >>  	}
> >>  
> >>  	scoped_guard(mutex, &asus_armoury.egpu_mutex) {
> >> -		err = armoury_set_devstate(attr, disable ? 1 : 0, NULL, ASUS_WMI_DEVID_DGPU);
> >> +		err = armoury_set_devstate(attr, disable ? 1 : 0, NULL,
> >> +					   asus_armoury.dgpu_disable_dev_id);
> >>  		if (err)
> >>  			return err;
> >>  	}
> >> @@ -516,7 +518,7 @@ static ssize_t dgpu_disable_current_value_store(struct kobject *kobj,
> >>  
> >>  	return count;
> >>  }
> >> -ASUS_WMI_SHOW_INT(dgpu_disable_current_value, ASUS_WMI_DEVID_DGPU);
> >> +ASUS_WMI_SHOW_INT(dgpu_disable_current_value, asus_armoury.dgpu_disable_dev_id);
> >>  ASUS_ATTR_GROUP_BOOL(dgpu_disable, "dgpu_disable", "Disable the dGPU");
> >>  
> >>  /* Values map for eGPU activation requests. */
> >> @@ -790,7 +792,6 @@ ASUS_ATTR_GROUP_INT_VALUE_ONLY_RO(nv_base_tgp, ATTR_NV_BASE_TGP, ASUS_WMI_DEVID_
> >>  static const struct asus_attr_group armoury_attr_groups[] = {
> >>  	{ &egpu_connected_attr_group, ASUS_WMI_DEVID_EGPU_CONNECTED },
> >>  	{ &egpu_enable_attr_group, ASUS_WMI_DEVID_EGPU },
> >> -	{ &dgpu_disable_attr_group, ASUS_WMI_DEVID_DGPU },
> >>  	{ &apu_mem_attr_group, ASUS_WMI_DEVID_APU_MEM },
> >>  
> >>  	{ &ppt_pl1_spl_attr_group, ASUS_WMI_DEVID_PPT_PL1_SPL },
> >> @@ -934,6 +935,21 @@ static int asus_fw_attr_add(void)
> >>  		}
> >>  	}
> >>  
> >> +	asus_armoury.dgpu_disable_dev_id = 0;
> >> +	if (armoury_has_devstate(ASUS_WMI_DEVID_DGPU))
> >> +		asus_armoury.dgpu_disable_dev_id = ASUS_WMI_DEVID_DGPU;
> >> +	else if (armoury_has_devstate(ASUS_WMI_DEVID_GPU_MODE))
> >> +		asus_armoury.dgpu_disable_dev_id = ASUS_WMI_DEVID_GPU_MODE;
> >> +
> >> +	if (asus_armoury.dgpu_disable_dev_id) {
> > Now I started to wonder why are we doing it like this and not using 
> > .is_visible?
> >
> > This question applies to the similar, existing cases as well.
> >
> > Denis?
> >
> >
> I don't understand the question. There are a bunch of .is_visible in the kernel and
> I'm not sure if I am looking the right one and therefore if I understood the question correctly.
> 
> It is written as this to memorize what the correct id is and therefore what
> to do.... but I doubt this answers you.

No, it doesn't.

With sysfs, .is_visible callbacks are normally used to hide attributes 
when feature is not supported or for other reasons, which simplifies the
setup code. This one checks manually asus_armoury.dgpu_disable_dev_id != 0 
in the setup code.

(In addition, sysfs could even be asked to change the visibility 
on-the-fly so it would re-execute the .is_visible callbacks to determine 
which of the attributes to show.)


-- 
 i.