Nicola Corna (nicola@corna.info) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/18328
-gerrit
commit cff9de517d8f11d68027e0d0285c7da2ec7d07d7 Author: Nicola Corna nicola@corna.info Date: Sat Feb 11 14:00:03 2017 +0100
ec/lenovo/h8: Add tablet mode switch method
thinkpad_acpi expects a MHKG method which returns the current state of the tablet mode switch shifted left by 3. If such method is not found, subsequent laptop/tablet mode events are ignored.
Tested on a X220T.
Change-Id: Ic9ffea2ffe507b3692d1dd7411c52b813ec32146 Signed-off-by: Nicola Corna nicola@corna.info --- src/ec/lenovo/h8/acpi/ec.asl | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/src/ec/lenovo/h8/acpi/ec.asl b/src/ec/lenovo/h8/acpi/ec.asl index b69acf8..497dde4 100644 --- a/src/ec/lenovo/h8/acpi/ec.asl +++ b/src/ec/lenovo/h8/acpi/ec.asl @@ -32,6 +32,9 @@ Device(EC) HSPA, 1, Offset (0x0C), LEDS, 8, /* LED state */ + Offset (0x0F), + , 7, + TBSW, 1, /* Tablet mode switch */ Offset (0x1a), DKR2, 1, /* Dock register 2 */ Offset (0x2a), @@ -354,6 +357,11 @@ Device(EC) { Return (0x07FFFFFF) } + /* Report tablet mode switch state */ + Method (MHKG, 0, NotSerialized) + { + Return (TBSW << 3) + } /* Version */ Method (MHKV, 0, NotSerialized) {