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platform/x86: ideapad-laptop: Disable touchpad_switch

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[ Upstream commit a231224a601c1924b9df620281ad04472900d75f ]

Ideapads for "Lenovo Yoga 3 Pro 1370" and "ZhaoYang K4e-IML" do not
use EC to switch touchpad.

Reading VPCCMD_R_TOUCHPAD will return zero thus touchpad may be blocked
unexpectedly.

Signed-off-by: Manyi Li <limanyi@uniontech.com>
Link: https://lore.kernel.org/r/20221018095323.14591-1-limanyi@uniontech.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Manyi Li 2022-10-18 17:53:23 +08:00 committed by Greg Kroah-Hartman
parent 5e38740ae5
commit f707986a14
1 changed files with 24 additions and 1 deletions
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25
drivers/platform/x86/ideapad-laptop.c
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@ -1499,6 +1499,24 @@ static const struct dmi_system_id hw_rfkill_list[] = {
{}
};
static const struct dmi_system_id no_touchpad_switch_list[] = {
{
.ident = "Lenovo Yoga 3 Pro 1370",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3"),
},
},
{
.ident = "ZhaoYang K4e-IML",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "ZhaoYang K4e-IML"),
},
},
{}
};
static void ideapad_check_features(struct ideapad_private *priv)
{
acpi_handle handle = priv->adev->handle;
@ -1507,7 +1525,12 @@ static void ideapad_check_features(struct ideapad_private *priv)
priv->features.hw_rfkill_switch = dmi_check_system(hw_rfkill_list);
/* Most ideapads with ELAN0634 touchpad don't use EC touchpad switch */
priv->features.touchpad_ctrl_via_ec = !acpi_dev_present("ELAN0634", NULL, -1);
if (acpi_dev_present("ELAN0634", NULL, -1))
priv->features.touchpad_ctrl_via_ec = 0;
else if (dmi_check_system(no_touchpad_switch_list))
priv->features.touchpad_ctrl_via_ec = 0;
else
priv->features.touchpad_ctrl_via_ec = 1;
if (!read_ec_data(handle, VPCCMD_R_FAN, &val))
priv->features.fan_mode = true;