linux-kernel - Re: [PATCH] platform/x86: dell-laptop: Add drm module soft dependency

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Message-ID: <20230607042032.GA28835@srcf.ucam.org>
Date:   Wed, 7 Jun 2023 05:20:32 +0100
From:   Matthew Garrett <mjg59@...f.ucam.org>
To:     AceLan Kao <acelan.kao@...onical.com>
Cc:     Pali Rohár <pali@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] platform/x86: dell-laptop: Add drm module soft dependency

On Wed, Jun 07, 2023 at 11:43:31AM +0800, AceLan Kao wrote:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao@...onical.com>
> 
> dell_laptop is somethines loaded before nvidia driver, causing it to
> create its own backlight interface before native backlight is set.
> This results in the presence of 2 backlight interfaces in sysfs and
> leads to the backlight can't be adjusted.

It seems like this approach would still be broken if the nvidia module 
isn't available at the time the dell module is loaded?