From: Hans de Goede <hdegoede@redhat.com>
To: Mark Gross <markgross@kernel.org>, Andy Shevchenko <andy@kernel.org>
Cc: "Barnabás Pőcze" <pobrn@protonmail.com>,
"Kai Heng Feng" <kai.heng.feng@canonical.com>,
"Maxim Mikityanskiy" <maxtram95@gmail.com>,
"GOESSEL Guillaume" <g_goessel@outlook.com>,
"Jiaxun Yang" <jiaxun.yang@flygoat.com>,
"Manyi Li" <limanyi@uniontech.com>,
"Eray Orçunus" <erayorcunus@gmail.com>,
"Philipp Jungkamp" <p.jungkamp@gmx.net>,
"Arnav Rawat" <arnavr3@illinois.edu>,
"Kelly Anderson" <kelly@xilka.com>,
"Meng Dong" <whenov@gmail.com>,
"Felix Eckhofer" <felix@eckhofer.com>,
"Ike Panhc" <ike.pan@canonical.com>,
platform-driver-x86@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH] platform/x86: ideapad-laptop: Stop sending KEY_TOUCHPAD_TOGGLE
Date: Fri, 31 Mar 2023 19:38:08 +0200 [thread overview]
Message-ID: <7d386897-76a5-976b-e8ed-6e576f8e3ac9@redhat.com> (raw)
In-Reply-To: <20230330194644.64628-1-hdegoede@redhat.com>
Hi,
On 3/30/23 21:46, Hans de Goede wrote:
> Commit 5829f8a897e4 ("platform/x86: ideapad-laptop: Send
> KEY_TOUCHPAD_TOGGLE on some models") made ideapad-laptop send
> KEY_TOUCHPAD_TOGGLE when we receive an ACPI notify with VPC event bit 5 set
> and the touchpad-state has not been changed by the EC itself already.
>
> This was done under the assumption that this would be good to do to make
> the touchpad-toggle hotkey work on newer models where the EC does not
> toggle the touchpad on/off itself (because it is not routed through
> the PS/2 controller, but uses I2C).
>
> But it turns out that at least some models, e.g. the Yoga 7-15ITL5 the EC
> triggers an ACPI notify with VPC event bit 5 set on resume, which would
> now cause a spurious KEY_TOUCHPAD_TOGGLE on resume to which the desktop
> environment responds by disabling the touchpad in software, breaking
> the touchpad (until manually re-enabled) on resume.
>
> It was never confirmed that sending KEY_TOUCHPAD_TOGGLE actually improves
> things on new models and at least some new models like the Yoga 7-15ITL5
> don't have a touchpad on/off toggle hotkey at all, while still sending
> ACPI notify events with VPC event bit 5 set.
>
> So it seems best to revert the change to send KEY_TOUCHPAD_TOGGLE when
> receiving an ACPI notify events with VPC event bit 5 and the touchpad
> state as reported by the EC has not changed.
>
> Note this is not a full revert the code to cache the last EC touchpad
> state is kept to avoid sending spurious KEY_TOUCHPAD_ON / _OFF events
> on resume.
>
> Fixes: 5829f8a897e4 ("platform/x86: ideapad-laptop: Send KEY_TOUCHPAD_TOGGLE on some models")
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=217234
> Cc: stable@vger.kernel.org
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
I've applied this patch to my fixes branch now:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=fixes
Note it will show up in my fixes branch once I've pushed my
local branch there, which might take a while.
I will include this patch in my next fixes pull-req to Linus
for the current kernel development cycle.
Regards,
Hans
> ---
> drivers/platform/x86/ideapad-laptop.c | 23 ++++++++++-------------
> 1 file changed, 10 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
> index b5ef3452da1f..35c63cce0479 100644
> --- a/drivers/platform/x86/ideapad-laptop.c
> +++ b/drivers/platform/x86/ideapad-laptop.c
> @@ -1170,7 +1170,6 @@ static const struct key_entry ideapad_keymap[] = {
> { KE_KEY, 65, { KEY_PROG4 } },
> { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
> { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
> - { KE_KEY, 68, { KEY_TOUCHPAD_TOGGLE } },
> { KE_KEY, 128, { KEY_ESC } },
>
> /*
> @@ -1526,18 +1525,16 @@ static void ideapad_sync_touchpad_state(struct ideapad_private *priv, bool send_
> if (priv->features.ctrl_ps2_aux_port)
> i8042_command(¶m, value ? I8042_CMD_AUX_ENABLE : I8042_CMD_AUX_DISABLE);
>
> - if (send_events) {
> - /*
> - * On older models the EC controls the touchpad and toggles it
> - * on/off itself, in this case we report KEY_TOUCHPAD_ON/_OFF.
> - * If the EC did not toggle, report KEY_TOUCHPAD_TOGGLE.
> - */
> - if (value != priv->r_touchpad_val) {
> - ideapad_input_report(priv, value ? 67 : 66);
> - sysfs_notify(&priv->platform_device->dev.kobj, NULL, "touchpad");
> - } else {
> - ideapad_input_report(priv, 68);
> - }
> + /*
> + * On older models the EC controls the touchpad and toggles it on/off
> + * itself, in this case we report KEY_TOUCHPAD_ON/_OFF. Some models do
> + * an acpi-notify with VPC bit 5 set on resume, so this function get
> + * called with send_events=true on every resume. Therefor if the EC did
> + * not toggle, do nothing to avoid sending spurious KEY_TOUCHPAD_TOGGLE.
> + */
> + if (send_events && value != priv->r_touchpad_val) {
> + ideapad_input_report(priv, value ? 67 : 66);
> + sysfs_notify(&priv->platform_device->dev.kobj, NULL, "touchpad");
> }
>
> priv->r_touchpad_val = value;
prev parent reply other threads:[~2023-03-31 17:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-30 19:46 [PATCH] platform/x86: ideapad-laptop: Stop sending KEY_TOUCHPAD_TOGGLE Hans de Goede
2023-03-31 9:51 ` Maxim Mikityanskiy
2023-04-03 20:51 ` Maxim Mikityanskiy
2023-04-04 7:56 ` Hans de Goede
2023-03-31 17:38 ` Hans de Goede [this message]
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