linux-kernel - Re: [PATCH] hid: Support for Litra Glow

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Date:   Fri, 16 Dec 2022 10:53:37 +0100
From:   Bastien Nocera <hadess@...ess.net>
To:     Andreas Bergmeier <abergmeier@....net>,
        Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Filipe Laíns <lains@...eup.net>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hid: Support for Litra Glow

On Thu, 2022-12-15 at 22:09 +0100, Andreas Bergmeier wrote:
> Tries to implement as general support for Illumination Light as
> possible. Note that it is singular, which means by Logitech spec we
> are
> fine off with just handling one capability/device.

Your email client absolutely trashed the patch's indentation, it's
unreadable as-is.

> Implementation currently only exposes Brightness and On/Off controls.
> Does currently not expose Color Temperature because LEDs does not
> support it.
> 
> Introduces HIDPP_QUIRK_CLASS_SIMPLE_START to prevent reconnect on
> startup. Could not get Glow to work with that.

I'd really rather we didn't introduce a new quirk, but instead fixed
the fact that we need to restart the HID transport to support 3 (!)
devices.

Would something like the attached patch work? I haven't tested it yet,
but if it works for you, I'll test it on the devices I have here.

Cheers

View attachment "0001-HID-logitech-hidpp-Don-t-restart-communication-if-no.patch" of type "text/x-patch" (2828 bytes)