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From 83483e772d5b19b52b82e2518805be2e305e6a27 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineeringinc.com>
Date: Sun, 5 Apr 2015 23:22:18 -0500
Subject: [PATCH 10/22] mainboard/lenovo/t400: Add initial ATPX ACPI
implementation
Change-Id: I9b86ebec59ccb63db0e1ba61533d162507a22379
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
---
src/mainboard/lenovo/t400/acpi/graphics.asl | 101 ++++++++++++++++++++++++++++
src/mainboard/lenovo/t400/dsdt.asl | 3 +
2 files changed, 104 insertions(+)
create mode 100644 src/mainboard/lenovo/t400/acpi/graphics.asl
diff --git a/src/mainboard/lenovo/t400/acpi/graphics.asl b/src/mainboard/lenovo/t400/acpi/graphics.asl
new file mode 100644
index 0000000..e928d77
--- /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 0409e66..d2582ce 100644
--- a/src/mainboard/lenovo/t400/dsdt.asl
+++ b/src/mainboard/lenovo/t400/dsdt.asl
@@ -54,6 +54,9 @@ 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"
}
--
1.9.1
|
