linux-kernel - Re: [PATCH 0/3] platform/surface: Add support for tablet-mode switch on Surface Pro 9

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Date:   Thu, 16 Mar 2023 14:47:31 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Maximilian Luz <luzmaximilian@...il.com>
Cc:     Mark Gross <markgross@...nel.org>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] platform/surface: Add support for tablet-mode switch
 on Surface Pro 9

Hi,

On 3/4/23 20:46, Maximilian Luz wrote:
> This series adds support for the tablet-mode switch on the Surface Pro
> 9. On that device, the posture subsystem (POS) can be used to query the
> state of the Type-Cover (detached, laptop-mode, flipped-back, ...) and
> receive notifications when it changes. We can use this to implement a
> tablet mode switch, extending the driver already in use on the Surface
> Laptop Studio.
> 
> More specifically, the posture subsystem allows for different posture
> sources, identified by a numerical ID, each of which can have different
> states. At the moment, however, the tablet-mode switch driver using the
> POS subsystem only supports the Surface Laptop Studio, and support for
> that is hard-coded.
> 
> To support the Surface Pro 9, we therefore need to adapt the driver to
> properly disambiguate between different posture sources (patch 1) and
> then implement the respective functions for the source ID representing
> the Type-Cover (patch 2). Finally, we also need to add the respective
> device to the Surface Pro 9 entry in the aggregator registry, to allow
> the driver to load (patch 3). 
> 
> Maximilian Luz (3):
>   platform/surface: aggregator_tabletsw: Properly handle different
>     posture source IDs
>   platform/surface: aggregator_tabletsw: Add support for Type-Cover
>     posture source
>   platform/surface: aggregator_registry: Add support for tablet-mode
>     switch on Surface Pro 9
> 
>  .../surface/surface_aggregator_registry.c     |   2 +-
>  .../surface/surface_aggregator_tabletsw.c     | 180 ++++++++++++++----
>  2 files changed, 142 insertions(+), 40 deletions(-)


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