linux-kernel - Re: [PATCH v3 0/3] Support for ASUS egpu, dpgu disable, panel overdrive

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Date:   Thu, 12 Aug 2021 17:23:51 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     "Luke D. Jones" <luke@...nes.dev>, linux-kernel@...r.kernel.org
Cc:     mgross@...ux.intel.com, pobrn@...tonmail.com,
        corentin.chary@...il.com
Subject: Re: [PATCH v3 0/3] Support for ASUS egpu, dpgu disable, panel
 overdrive

Hi,

On 8/7/21 4:36 AM, Luke D. Jones wrote:
> This patch series adds support for some functions that are found on newer
> ASUS gaming laptops:
> 
> - Panel overdrive: Some laptops can drive the LCD matrix slightly faster
>   to eliminate or reduce ghosting artifacts
> 
> - dGPU disable: ASUS added a function in ACPI to disable or enable the dGPU
>   which removes it from the PCI bus. Presumably this was to help prevent
>   Windows apps from using the dGPU when the user didn't want them to but
>   because of how it works it also means that when rebooted to Linux the dGPU
>   no-longer exits. This patch enables a user to echo 0/1 to a WMI path to
>   re-enable it (or disable, but the drivers *must* be unloaded first).
> 
> - eGPU enable: The ASUS x-flow lpatop has an iGPU, a dGPU, and an optional
>   eGPU. This patch enables the user to echo 0/1 to a WMI path to enable or
>   disable the eGPU. In ACPI this also appears to remove the dGPU from the
>   PCI bus.
> 
> All of the above patches have been tested over the course of a few months.
> There is a small possibility of user error perhaps, where the user tries to
> enable or disable the dGPU/eGPU while drivers are loaded which would cause
> a system hang, but it is expected that almost all users would be using the
> `asusctl` daemon and dbus methods to manage the above which then eliminates
> these issues.

Thank you for your patch-series, I've applied the series to my
review-hans branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Note it will show up in my review-hans branch once I've pushed my
local branch there, which might take a while.

Once I've run some tests on this branch the patches there will be
added to the platform-drivers-x86/for-next branch and eventually
will be included in the pdx86 pull-request to Linus for the next
merge-window.

Regards,

Hans


> 
> Luke D. Jones (3):
>   asus-wmi: Add panel overdrive functionality
>   asus-wmi: Add dgpu disable method
>   asus-wmi: Add egpu enable method
> 
>  drivers/platform/x86/asus-wmi.c            | 289 +++++++++++++++++++++
>  include/linux/platform_data/x86/asus-wmi.h |   7 +
>  2 files changed, 296 insertions(+)
> 
> --
> 2.31.1
>