This driver maps the Lenovo Yoga tablet mode switch to a SW_TABLET_MODE input device. This will make the tablet status available to desktop environments. This patch series is the result of the discussion at https://lore.kernel.org/r/CAG4kvq9US=-NjyXFMzJYu2zCJryJWtOc7FGZbrewpgCDjdAkbg@xxxxxxxxxxxxxx/ I decided to follow-up on the patch Gergo wrote and respond to the review comments to get it merged and available for everyone. Gergo and I have tested this on the Yoga 7 14ARB7, and the Yoga 7 14AIL7 respectively. Additionally, according to reports at https://github.com/lukas-w/yoga-usage-mode, which uses the same WMI devices, this driver should work with: Yoga C940, Ideapad flex 14API, Yoga 9 14IAP7, Yoga 7 14ARB7, etc. v1: https://lore.kernel.org/r/20230310041726.217447-1-kallmeyeras@xxxxxxxxx/ v2: https://lore.kernel.org/r/20230323025200.5462-1-kallmeyeras@xxxxxxxxx/ The diff since v2 is as follows: --- a/drivers/platform/x86/lenovo-ymc.c +++ b/drivers/platform/x86/lenovo-ymc.c @@ -21,8 +21,8 @@ #define LENOVO_YMC_QUERY_METHOD 0x01 static bool ec_trigger __read_mostly; -module_param(ec_trigger, bool, 0644); -MODULE_PARM_DESC(ec_trigger, "Enable EC triggering to emit YMC events"); +module_param(ec_trigger, bool, 0444); +MODULE_PARM_DESC(ec_trigger, "Enable EC triggering work-around to force emitting tablet mode events"); static const struct dmi_system_id ec_trigger_quirk_dmi_table[] = { { @@ -43,8 +43,7 @@ struct lenovo_ymc_private { static void lenovo_ymc_trigger_ec(struct wmi_device *wdev, struct lenovo_ymc_private *priv) { int err; - - if (!ec_trigger || !priv || !priv->ec_acpi_dev) + if (!priv->ec_acpi_dev) return; err = write_ec_cmd(priv->ec_acpi_dev->handle, VPCCMD_W_YMC, 1); if (err) @@ -103,11 +102,7 @@ static void lenovo_ymc_notify(struct wmi_device *wdev, union acpi_object *data) lenovo_ymc_trigger_ec(wdev, priv); } -static void lenovo_ymc_remove(struct wmi_device *wdev) -{ - struct lenovo_ymc_private *priv = dev_get_drvdata(&wdev->dev); - acpi_dev_put(priv->ec_acpi_dev); -} +static void acpi_dev_put_helper(void *p) { acpi_dev_put(p); } static int lenovo_ymc_probe(struct wmi_device *wdev, const void *ctx) { @@ -124,10 +119,18 @@ static int lenovo_ymc_probe(struct wmi_device *wdev, const void *ctx) if (ec_trigger) { pr_debug("Lenovo YMC enable EC triggering.\n"); priv->ec_acpi_dev = acpi_dev_get_first_match_dev("VPC2004", NULL, -1); + if (!priv->ec_acpi_dev) { dev_err(&wdev->dev, "Could not find EC ACPI device.\n"); return -ENODEV; } + err = devm_add_action_or_reset(&wdev->dev, + acpi_dev_put_helper, priv->ec_acpi_dev); + if (err) { + dev_err(&wdev->dev, + "Could not clean up EC ACPI device: %d\n", err); + return err; + } } input_dev = devm_input_allocate_device(&wdev->dev); @@ -138,9 +141,6 @@ static int lenovo_ymc_probe(struct wmi_device *wdev, const void *ctx) input_dev->phys = LENOVO_YMC_EVENT_GUID "/input0"; input_dev->id.bustype = BUS_HOST; input_dev->dev.parent = &wdev->dev; - - input_set_capability(input_dev, EV_SW, SW_TABLET_MODE); - err = sparse_keymap_setup(input_dev, lenovo_ymc_keymap, NULL); if (err) { dev_err(&wdev->dev, @@ -177,7 +177,6 @@ static struct wmi_driver lenovo_ymc_driver = { .id_table = lenovo_ymc_wmi_id_table, .probe = lenovo_ymc_probe, .notify = lenovo_ymc_notify, - .remove = lenovo_ymc_remove, }; module_wmi_driver(lenovo_ymc_driver); Andrew Kallmeyer (1): platform/x86: Move ideapad ACPI helpers to a new header Gergo Koteles (1): platform/x86: Add driver for Yoga Tablet Mode switch drivers/platform/x86/Kconfig | 10 ++ drivers/platform/x86/Makefile | 1 + drivers/platform/x86/ideapad-laptop.c | 135 +------------------ drivers/platform/x86/ideapad-laptop.h | 152 +++++++++++++++++++++ drivers/platform/x86/lenovo-ymc.c | 185 ++++++++++++++++++++++++++ 5 files changed, 349 insertions(+), 134 deletions(-) create mode 100644 drivers/platform/x86/ideapad-laptop.h create mode 100644 drivers/platform/x86/lenovo-ymc.c -- 2.40.0
