linux-kernel - Re: [PATCH AUTOSEL 5.10 4/8] platform/x86: touchscreen_dmi: Add support for setting touchscreen properties from cmdline

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Date: Tue, 18 Jun 2024 11:06:27 +0200
From: Pavel Machek <pavel@....cz>
To: Sasha Levin <sashal@...nel.org>
Cc: linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Hans de Goede <hdegoede@...hat.com>,
	Gregor Riepl <onitake@...il.com>, corbet@....net,
	ilpo.jarvinen@...ux.intel.com, paulmck@...nel.org,
	jpoimboe@...nel.org, tglx@...utronix.de, bp@...en8.de,
	xiongwei.song@...driver.com, linux-doc@...r.kernel.org,
	linux-input@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 5.10 4/8] platform/x86: touchscreen_dmi: Add
 support for setting touchscreen properties from cmdline

Hi!

> [ Upstream commit 0b178b02673998f5acca5a0365a8858ca45beedb ]
> 
> On x86/ACPI platforms touchscreens mostly just work without needing any
> device/model specific configuration. But in some cases (mostly with Silead
> and Goodix touchscreens) it is still necessary to manually specify various
> touchscreen-properties on a per model basis.
> 
> touchscreen_dmi is a special place for DMI quirks for this, but it can be
> challenging for users to figure out the right property values, especially
> for Silead touchscreens where non of these can be read back from
> the touchscreen-controller.
> 
> ATM users can only test touchscreen properties by editing touchscreen_dmi.c
> and then building a completely new kernel which makes it unnecessary
> difficult for users to test and submit properties when necessary for their
> laptop / tablet model.
> 
> Add support for specifying properties on the kernel commandline to allow
> users to easily figure out the right settings. See the added documentation
> in kernel-parameters.txt for the commandline syntax.

I don't believe this is suitable for stable.

Best regards,
								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

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