linux-kernel - Re: [PATCH 0/4] platform/surface: Add support for tablet mode switch via Surface Aggregator Module

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Date:   Sat, 2 Jul 2022 11:13:20 +0200
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 0/4] platform/surface: Add support for tablet mode switch
 via Surface Aggregator Module

Hi,

On 6/24/22 20:36, Maximilian Luz wrote:
> This series adds a driver providing a tablet mode switch on the Surface
> Pro 8, Surface Pro X, and Surface Laptop Studio.
> 
> These devices provide posture information via subsystems of the Surface
> Aggregator Module (SAM; embedded controller). While the specific
> subsystems used for the Pro and Laptop models differ, large parts of the
> respective subsystem drivers would be equal. Therefore, we essentially
> provide a generic framework for tablet-mode switches via the Surface
> Aggregator module and use that to implement specific support for the KIP
> and POS subsystems used on the aforementioned devices.
> 
> In addition, this series first introduces some helper macros for
> synchronous stack-allocated SAM requests used in the subsequent patches,
> extending the already existing ones.
> 
> Further, this series adds the respective firmware nodes to the Surface
> Aggregator Registry.

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



> 
> Maximilian Luz (4):
>   platform/surface: aggregator: Add helper macros for requests with
>     argument and return value
>   platform/surface: Add KIP/POS tablet-mode switch driver
>   platform/surface: aggregator_registry: Add support for tablet mode
>     switch on Surface Pro 8
>   platform/surface: aggregator_registry: Add support for tablet mode
>     switch on Surface Laptop Studio
> 
>  .../sysfs-bus-surface_aggregator-tabletsw     |  57 ++
>  MAINTAINERS                                   |   6 +
>  drivers/platform/surface/Kconfig              |  23 +
>  drivers/platform/surface/Makefile             |   1 +
>  .../surface/surface_aggregator_registry.c     |  15 +-
>  .../surface/surface_aggregator_tabletsw.c     | 533 ++++++++++++++++++
>  include/linux/surface_aggregator/controller.h | 125 ++++
>  include/linux/surface_aggregator/device.h     |  36 ++
>  8 files changed, 795 insertions(+), 1 deletion(-)
>  create mode 100644 Documentation/ABI/testing/sysfs-bus-surface_aggregator-tabletsw
>  create mode 100644 drivers/platform/surface/surface_aggregator_tabletsw.c
>