linux-kernel - Re: [PATCH] Input: i8042 - Add deferred probe support

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Date:   Wed, 17 Nov 2021 07:36:57 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Fabio Estevam <festevam@...il.com>
Subject: Re: [PATCH] Input: i8042 - Add deferred probe support

On Fri, 12 Nov 2021 19:00:22 +0100,
Takashi Iwai wrote:
> 
> We've got a bug report about the non-working keyboard on ASUS ZenBook
> UX425UA.  It seems that the PS/2 device isn't ready immediately at
> boot but takes some seconds to get ready.  Until now, the only
> workaround is to defer the probe, but it's available only when the
> driver is a module.  However, many distros, including openSUSE as in
> the original report, build the PS/2 input drivers into kernel, hence
> it won't work easily.
> 
> This patch adds the support for the deferred probe for i8042 stuff as
> a workaround of the problem above.  When the deferred probe mode is
> enabled and the device couldn't be probed, it'll be repeated with the
> standard deferred probe mechanism.
> 
> The deferred probe mode is enabled either via the new option
> i8042.probe_defer or via the quirk table entry.  As of this patch, the
> quirk table contains only ASUS ZenBook UX425UA.
> 
> The deferred probe part is based on Fabio's initial work.
> 
> BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1190256
> Link: https://lore.kernel.org/r/s5ho890n1rh.wl-tiwai@suse.de
> Cc: Fabio Estevam <festevam@...il.com>
> Signed-off-by: Takashi Iwai <tiwai@...e.de>

There was a typo in MODULE_PARAM_DESC().  Will resubmit v2 patch.


Takashi