linux-kernel - Re: [PATCH 0/2] HID: Add support for Surface Aggregator Module HID transport

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Date:   Tue, 30 Mar 2021 09:22:48 +0200 (CEST)
From:   Jiri Kosina <jikos@...nel.org>
To:     Maximilian Luz <luzmaximilian@...il.com>
cc:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <mgross@...ux.intel.com>,
        Blaž Hrastnik <blaz@...n.io>,
        linux-input@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] HID: Add support for Surface Aggregator Module HID
 transport

On Wed, 10 Mar 2021, Maximilian Luz wrote:

> This series adds support for the Surface System Aggregator Module (SSAM)
> HID transport subsystem.
> 
> The SSAM is an embedded controller, found on 5th- and later generation
> Microsoft Surface devices. On some of these devices (specifically
> Surface Laptops 1, 2, and 3, as well as Surface Book 3), built-in input
> devices are connected via the SSAM. These devices communicate (mostly)
> via normal HID reports, so adding support for them is (mostly) just a
> matter of implementing an HID transport driver.
> 
> SSAM actually has two different HID interfaces: One (legacy) interface
> used on Surface Laptops 1 and 2, and a newer interface for the rest. The
> newer interface allows for multiple HID devices to be addressed and is
> implemented in the first patch. The older interface only allows a single
> HID device to be connected and, furthermore, only allows a single output
> report, specifically one for the caps lock LED. This is implemented in
> the second patch.
> 
> See the commit messages of the respective patches for more details.

Now queued in hid.git#for-5.13/surface-system-aggregator-intergration

Thanks,

-- 
Jiri Kosina
SUSE Labs