From f91280f35895d6dcb53f504968fafd1da0b00397 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sat, 29 Apr 2023 18:34:58 +0200 Subject: ACPI: x86: Add ACPI_QUIRK_UART1_SKIP for Lenovo Yoga Book yb1-x90f/l The Lenovo Yoga Book yb1-x90f/l 2-in-1 which ships with Android as Factory OS has (another) bug in its DSDT where the UART resource for the BTH0 ACPI device contains "\\_SB.PCIO.URT1" as path to the UART. Note that is with a letter 'O' instead of the number '0' which is wrong. This causes Linux to instantiate a standard /dev/ttyS? device for the UART instead of a /sys/bus/serial device, which in turn causes bluetooth to not work. Similar DSDT bugs have been encountered before and to work around those the acpi_quirk_skip_serdev_enumeration() helper exists. Previous devices had the broken resource pointing to the first UART, while the BT HCI was on the second UART, which ACPI_QUIRK_UART1_TTY_UART2_SKIP deals with. Add a new ACPI_QUIRK_UART1_SKIP quirk for skipping enumeration of UART1 instead for the Yoga Book case and add this quirk to the existing DMI quirk table entry for the yb1-x90f/l . This leaves the UART1 controller unbound allowing the x86-android-tablets module to manually instantiate a serdev for it fixing bluetooth. Signed-off-by: Hans de Goede Signed-off-by: Rafael J. Wysocki --- drivers/acpi/x86/utils.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) (limited to 'drivers/acpi/x86/utils.c') diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c index 4cfee2da0675..c2b925f8cd4e 100644 --- a/drivers/acpi/x86/utils.c +++ b/drivers/acpi/x86/utils.c @@ -259,10 +259,11 @@ bool force_storage_d3(void) * drivers/platform/x86/x86-android-tablets.c kernel module. */ #define ACPI_QUIRK_SKIP_I2C_CLIENTS BIT(0) -#define ACPI_QUIRK_UART1_TTY_UART2_SKIP BIT(1) -#define ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY BIT(2) -#define ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY BIT(3) -#define ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS BIT(4) +#define ACPI_QUIRK_UART1_SKIP BIT(1) +#define ACPI_QUIRK_UART1_TTY_UART2_SKIP BIT(2) +#define ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY BIT(3) +#define ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY BIT(4) +#define ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS BIT(5) static const struct dmi_system_id acpi_quirk_skip_dmi_ids[] = { /* @@ -319,6 +320,7 @@ static const struct dmi_system_id acpi_quirk_skip_dmi_ids[] = { DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"), }, .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | + ACPI_QUIRK_UART1_SKIP | ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), }, @@ -449,6 +451,9 @@ int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *s if (dmi_id) quirks = (unsigned long)dmi_id->driver_data; + if ((quirks & ACPI_QUIRK_UART1_SKIP) && uid == 1) + *skip = true; + if (quirks & ACPI_QUIRK_UART1_TTY_UART2_SKIP) { if (uid == 1) return -ENODEV; /* Create tty cdev instead of serdev */ -- cgit v1.2.3