diff options
Diffstat (limited to 'src/mainboard/lenovo/t400')
| -rw-r--r-- | src/mainboard/lenovo/t400/acpi/graphics.asl | 101 | ||||
| -rw-r--r-- | src/mainboard/lenovo/t400/dsdt.asl | 3 |
2 files changed, 104 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/t400/acpi/graphics.asl b/src/mainboard/lenovo/t400/acpi/graphics.asl new file mode 100644 index 0000000000..e928d77ff4 --- /dev/null +++ b/src/mainboard/lenovo/t400/acpi/graphics.asl @@ -0,0 +1,101 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* WARNING + * Switchable graphics not yet tested! + */ + +/* Hybrid graphics enable/disable GPIO bitfields */ +Name (HYG1, 0x004A0000) +Name (HYG2, 0x00020000) + +/* GPIO control port */ +Name (GPCP, DEFAULT_GPIOBASE) + +/* GPIO control map */ +OperationRegion (GPCM, SystemIO, GPCP, 0x3F) +Field (GPCM, ByteAcc, NoLock, Preserve) { + GPUS, 32, + GPIS, 32, + Offset (0x0C), + GPLV, 32, + Offset (0x30), + GQUS, 32, + GQIS, 32, + GQLV, 32 +} + +Method(SHYB, 1) { + /* Switch hybrid graphics */ + if (LEqual(Arg0, One)) + { + /* Discrete graphics requested */ + Or(GPLV, HYG1, GPLV) + Or(GQLV, HYG2, GQLV) + } + else + { + /* Integrated graphics requested */ + Xor(HYG1, 0xFFFFFFFF, Local0) + And(GPLV, Local0, GPLV) + Xor(HYG2, 0xFFFFFFFF, Local0) + And(GQLV, Local0, GQLV) + } +} + +Method (ATPX, 2, NotSerialized) { + /* Create local variables */ + Name (ATPR, Buffer (0x08) { + 0x0, 0x0, 0x0, 0x0, + 0x0, 0x0, 0x0, 0x0 + }) + CreateWordField (ATPR, 0x00, SIZE) + CreateWordField (ATPR, 0x02, VERS) + CreateDWordField (ATPR, 0x02, MASK) + CreateDWordField (ATPR, 0x04, FUNC) + CreateDWordField (ATPR, 0x06, FLAG) + + /* Version request */ + if (LEqual(Arg0, 0x0)) + { + /* Assemble and return version information */ + Store (0x08, SIZE) /* Response length */ + Store (0x01, VERS) /* Version number */ + Store (0x0F, FUNC) /* Supported functions? */ + Return (ATPR) + } + + /* Mux select */ + if (LEqual(Arg0, 0x2)) + { + CreateByteField (Arg1, 0x02, PWST) + Store (PWST, Local0) + And (Local0, 0x01, Local0) + If (Local0) + { + /* Enable discrete graphics */ + SHYB(0x01) + } + else + { + /* Enable integrated graphics */ + SHYB(0x00) + } + } +} diff --git a/src/mainboard/lenovo/t400/dsdt.asl b/src/mainboard/lenovo/t400/dsdt.asl index 5545c94420..62747551fe 100644 --- a/src/mainboard/lenovo/t400/dsdt.asl +++ b/src/mainboard/lenovo/t400/dsdt.asl @@ -53,6 +53,9 @@ DefinitionBlock( /* Chipset specific sleep states */ #include <southbridge/intel/i82801ix/acpi/sleepstates.asl> + /* Hybrid graphics support code */ + #include "acpi/graphics.asl" + /* Dock support code */ #include "acpi/dock.asl" } |