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Message-ID: <cf87d6a5-7ff3-4add-8c48-fd3447b32697@leemhuis.info>
Date:   Wed, 27 Sep 2023 19:23:37 +0200
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Subject: Re: [regression] Resume broken on T14s Gen1 (AMD) due to "Input:
 psmouse - add delay when deactivating for SMBus mode"
To:     Jeffery Miller <jefferymiller@google.com>
Cc:     Andrew Duggan <aduggan@synaptics.com>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Benjamin Tissoires <benjamin.tissoires@redhat.com>,
        linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
        Linux kernel regressions list <regressions@lists.linux.dev>
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From:   Thorsten Leemhuis <linux@leemhuis.info>
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On 27.09.23 17:55, Jeffery Miller wrote:
> On Wed, Sep 27, 2023 at 10:43 AM Jeffery Miller
> <jefferymiller@google.com> wrote:
>> On Wed, Sep 27, 2023 at 3:54 AM Thorsten Leemhuis <linux@leemhuis.info> wrote:
>>>
>>> My dmesg from a kernel with the revert:
>>> https://www.leemhuis.info/files/misc/dmesg

Thx for looking into this!

>> In this dmesg output it shows that this is an elantech smbus device:
>> ```
>> [    4.260415] psmouse serio1: elantech: assuming hardware version 4 (with firmware version 0x7f3001)
>> [    4.279297] psmouse serio1: elantech: Synaptics capabilities query result 0x90, 0x18, 0x0f.
>> [    4.292788] psmouse serio1: elantech: Elan sample query result 00, 80, c9
>> [    4.319184] psmouse serio1: elantech: Elan ic body: 0x10, current fw version: 0x3
>> ...
>> [    4.346951] psmouse serio1: elantech: Trying to set up SMBus access
>> [    4.346986] psmouse serio1: elantech: SMbus companion is not ready yet
>> [    4.369993] input: ETPS/2 Elantech TrackPoint as /devices/platform/i8042/serio1/input/input7
>> [    4.376200] systemd[1]: bpf-lsm: LSM BPF program attached
>> [    4.385192] input: ETPS/2 Elantech Touchpad as /devices/platform/i8042/serio1/input/input5
>> ```
>> The change in 92e24e0e57f72e shouldn't affect the elantouch device as  elantech_setup_smbus
>> initializes `psmouse_smbus_init` with need_deactivate = false.

Hmmm. Wondering if I should warm up the compiler again to recheck my
result one more time[1].

>> Did you store dmesg logs from boot without the applied patch?
> 
> I intended to ask if you have logs from a boot without 92e24e0e57f72e reverted.

https://www.leemhuis.info/files/misc/dmesg-6.6-rc3-vanilla

>> If the delay was being applied the timestamps should show the 30ms delay between
>> `psmouse serio1: elantech: Trying to set up SMBus access`
>> and
>> `psmouse serio1: elantech: SMbus companion is not ready yet`

Unless I missed something there is not difference. :-/

Ciao, Thorsten

[1] FWIW, this is my bisect log

"""
> git bisect start
> # status: waiting for both good and bad commits
> # bad: [6465e260f48790807eef06b583b38ca9789b6072] Linux 6.6-rc3
> git bisect bad 6465e260f48790807eef06b583b38ca9789b6072
> # status: waiting for good commit(s), bad commit known
> # good: [2dde18cd1d8fac735875f2e4987f11817cc0bc2c] Linux 6.5
> git bisect good 2dde18cd1d8fac735875f2e4987f11817cc0bc2c
> # good: [4fb0dacb78c6a041bbd38ddd998df806af5c2c69] Merge tag 'sound-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
> git bisect good 4fb0dacb78c6a041bbd38ddd998df806af5c2c69
> # good: [307d59039fb26212a84a9aa6a134a7d2bdea34ca] Merge tag 'media/v6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
> git bisect good 307d59039fb26212a84a9aa6a134a7d2bdea34ca
> # bad: [4a0fc73da97efd23a383ca839e6fe86410268f6b] Merge tag 's390-6.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
> git bisect bad 4a0fc73da97efd23a383ca839e6fe86410268f6b
> # good: [e4f1b8202fb59c56a3de7642d50326923670513f] Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
> git bisect good e4f1b8202fb59c56a3de7642d50326923670513f
> # good: [5eea5820c7340d39e56e169e1b87199391105f6b] Merge tag 'mm-stable-2023-09-04-14-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
> git bisect good 5eea5820c7340d39e56e169e1b87199391105f6b
> # good: [65d6e954e37872fd9afb5ef3fc0481bb3c2f20f4] Merge tag 'gfs2-v6.5-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
> git bisect good 65d6e954e37872fd9afb5ef3fc0481bb3c2f20f4
> # bad: [744a759492b5c57ff24a6e8aabe47b17ad8ee964] Merge tag 'input-for-v6.6-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
> git bisect bad 744a759492b5c57ff24a6e8aabe47b17ad8ee964
> # good: [dbce1a7d5dce7318d8465b1e0d052ef1d2202237] Input: Explicitly include correct DT includes
> git bisect good dbce1a7d5dce7318d8465b1e0d052ef1d2202237
> # good: [29057cc5bddc785ea0a11534d7ad2546fa0872d3] Merge tag 'linux-watchdog-6.6-rc1' of git://www.linux-watchdog.org/linux-watchdog
> git bisect good 29057cc5bddc785ea0a11534d7ad2546fa0872d3
> # bad: [3e4bb047b23375a34dbf5885709ac3729d9cfb22] Input: qt2160 - convert to use devm_* api
> git bisect bad 3e4bb047b23375a34dbf5885709ac3729d9cfb22
> # good: [e175eae16c1bf92062f1f431a95f476a61a77c48] Input: mcs-touchkey - convert to use devm_* api
> git bisect good e175eae16c1bf92062f1f431a95f476a61a77c48
> # bad: [92e24e0e57f72e06c2df87116557331fd2d4dda2] Input: psmouse - add delay when deactivating for SMBus mode
> git bisect bad 92e24e0e57f72e06c2df87116557331fd2d4dda2
> # good: [8362bf82fb5441613aac7c6c9dbb6b83def6ad3b] Input: mcs-touchkey - fix uninitialized use of error in mcs_touchkey_probe()
> git bisect good 8362bf82fb5441613aac7c6c9dbb6b83def6ad3b
> # first bad commit: [92e24e0e57f72e06c2df87116557331fd2d4dda2] Input: psmouse - add delay when deactivating for SMBus mode
"""