linux-kernel - Re: [PATCH v1] hid-playstation: DS4: Update rumble and lightbar together

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Message-ID: <cde0bcf3-eb31-48ae-93a6-e630ba80a068@enpas.org>
Date: Tue, 23 Jul 2024 04:30:53 +0900
From: Max Staudt <max@...as.org>
To: Benjamin Tissoires <bentiss@...nel.org>
Cc: Roderick Colenbrander <thunderbird2k@...il.com>,
 Jiri Kosina <jikos@...nel.org>,
 Benjamin Tissoires <benjamin.tissoires@...hat.com>,
 Roderick Colenbrander <roderick.colenbrander@...y.com>,
 linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] hid-playstation: DS4: Update rumble and lightbar
 together

On 7/23/24 01:49, Benjamin Tissoires wrote:
> Is there anyway to detect that the device can not support the current
> behavior? And if so then dynamically switch to the new behaviour?

Sadly, no, otherwise I would have used that already :(

Also, the change that my patch makes is in the "dialect" of the wire 
protocol. This seemingly changes zero in the original Sony device's 
behaviour, both from what my tests have shown, and from what I gather 
from Roderick's emails. HID traces on the web confirm that the PS4 may 
output such or similar reports as well. Hence I don't understand why we 
would want to make a distinction at all, if the driver can simply only 
speak the "dialect" that works on most devices.

Max