From: Henrik Rydberg <rydberg@bitmath.se>
To: Liam Mitchell <mitchell.liam@gmail.com>,
Henrik Rydberg <rydberg@bitmath.org>
Cc: linux-input@vger.kernel.org
Subject: Re: bcm5974 trackpad broken after USB reset
Date: Sun, 11 Jan 2026 20:59:44 +0100 [thread overview]
Message-ID: <38ea07c1-50ce-4342-aba9-fe2f4bc6c503@bitmath.se> (raw)
In-Reply-To: <CAOQ1CL4+DP1TuLAGNsz5GdFBTHvnTg=5q=Dr2Z1OQc6RXydSYA@mail.gmail.com>
Hi Liam,
> The trackpad on my 2013 MacBook Pro (10,2) stops working after the USB
> device is reset, logging "bad trackpad package, length: 8" when
> touching the trackpad.
This sounds like the device has left wellspring mode, and is not
properly reinitialized after reset. It has been a decade since I worked
on this driver, but what I can see, there is no reset_resume handler in
bcm5974, but there is one in appletouch.
I would look into the code around the wellspring mode switch function,
and see if it gets called after the usb reset. If not, adding the
reset_resume handler might resolve things.
Hope this helps,
Henrik
next prev parent reply other threads:[~2026-01-11 20:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-11 17:28 bcm5974 trackpad broken after USB reset Liam Mitchell
2026-01-11 19:59 ` Henrik Rydberg [this message]
2026-01-17 13:44 ` Liam Mitchell
2026-01-18 3:33 ` Henrik Rydberg
2026-01-18 9:59 ` Liam Mitchell
[not found] ` <CAOQ1CL74A+WLY_f+QJHQqV=Wvq8yzJktLZ2ByZ4vjfUSsra9EQ@mail.gmail.com>
[not found] ` <c2f1a90e-d6cb-480e-8f11-240b231adc84@bitmath.se>
2026-01-25 16:29 ` Liam Mitchell
2026-01-26 22:20 ` Henrik Rydberg
2026-01-27 18:25 ` Liam Mitchell
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