linux-kernel - 5.17-rc regression: X1 Carbon touchpad not resumed

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Date:   Mon, 7 Feb 2022 11:45:21 -0800 (PST)
From:   Hugh Dickins <hughd@...gle.com>
To:     Derek Basehore <dbasehore@...omium.org>
cc:     Rajat Jain <rajatja@...gle.com>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Wolfram Sang <wsa@...nel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Thorsten Leemhuis <regressions@...mhuis.info>,
        linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org
Subject: 5.17-rc regression: X1 Carbon touchpad not resumed

5.17-rc[1-3] on Lenovo ThinkPad X1 Carbon 5th gen: when lid closed
and opened and system resumed, the touchpad cursor cannot be moved.

Some dmesg from bootup:
[    2.211061] rmi4_smbus 6-002c: registering SMbus-connected sensor
[    2.263809] ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-95)
[    2.291782] rmi4_f01 rmi4-00.fn01: found RMI device, manufacturer: Synaptics, product: TM3289-002, fw id: 2492434
[    2.371377] input: Synaptics TM3289-002 as /devices/pci0000:00/0000:00:1f.4/i2c-6/6-002c/rmi4-00/input/input8
[    2.380820] serio: RMI4 PS/2 pass-through port at rmi4-00.fn03
...
[    2.725471] input: PS/2 Generic Mouse as /devices/pci0000:00/0000:00:1f.4/i2c-6/6-002c/rmi4-00/rmi4-00.fn03/serio2/input/input9

Some dmesg from resume:
[   79.221064] rmi4_smbus 6-002c: failed to get SMBus version number!
[   79.265074] rmi4_physical rmi4-00: rmi_driver_reset_handler: Failed to read current IRQ mask.
[   79.308330] rmi4_f01 rmi4-00.fn01: Failed to restore normal operation: -6.
[   79.308335] rmi4_f01 rmi4-00.fn01: Resume failed with code -6.
[   79.308339] rmi4_physical rmi4-00: Failed to suspend functions: -6
[   79.308342] rmi4_smbus 6-002c: Failed to resume device: -6
[   79.351967] rmi4_physical rmi4-00: Failed to read irqs, code=-6

Bisection led to 172d931910e1db800f4e71e8ed92281b6f8c6ee2
("i2c: enable async suspend/resume on i2c client devices")
and reverting that fixes it for me.

Hugh