summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorDave Airlie <airlied@redhat.com>2010-12-06 05:43:33 +0300
committerDave Airlie <airlied@redhat.com>2011-05-04 07:38:33 +0400
commit99b38b4acc0d7dbbab443273577cff60080fcfad (patch)
treef9eea8812d35db76e80d56489c4c0cab18032910
parentd4a3b10c16a1bdb09483233bd7aeac684ccc160a (diff)
downloadlinux-99b38b4acc0d7dbbab443273577cff60080fcfad.tar.xz
platform/x86: add MXM WMI driver.
MXM is a laptop graphics card form-factor + interface specification, this adds an initial stub driver to talk to the MXM WMI interface. The only method used is the MUX switching method needed to do switchable graphics on the nvidia chipsets. Signed-off-by: Dave Airlie <airlied@redhat.com> Acked-by: Matthew Garrett <mjg@redhat.com>
-rw-r--r--drivers/platform/x86/Kconfig7
-rw-r--r--drivers/platform/x86/Makefile1
-rw-r--r--drivers/platform/x86/mxm-wmi.c85
-rw-r--r--include/linux/mxm-wmi.h32
4 files changed, 125 insertions, 0 deletions
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 0485e394712a..94914572dd7f 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -753,4 +753,11 @@ config SAMSUNG_LAPTOP
To compile this driver as a module, choose M here: the module
will be called samsung-laptop.
+config MXM_WMI
+ tristate "WMI support for MXM Laptop Graphics"
+ depends on WMI
+ ---help---
+ MXM is a standard for laptop graphics cards, the WMI interface
+ is required for switchable nvidia graphics machines
+
endif # X86_PLATFORM_DEVICES
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 029e8861d086..a7ab3bc7b3a1 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -42,3 +42,4 @@ obj-$(CONFIG_XO15_EBOOK) += xo15-ebook.o
obj-$(CONFIG_IBM_RTL) += ibm_rtl.o
obj-$(CONFIG_SAMSUNG_LAPTOP) += samsung-laptop.o
obj-$(CONFIG_INTEL_MFLD_THERMAL) += intel_mid_thermal.o
+obj-$(CONFIG_MXM_WMI) += mxm-wmi.o
diff --git a/drivers/platform/x86/mxm-wmi.c b/drivers/platform/x86/mxm-wmi.c
new file mode 100644
index 000000000000..12b6f341e72b
--- /dev/null
+++ b/drivers/platform/x86/mxm-wmi.c
@@ -0,0 +1,85 @@
+/*
+ * MXM WMI driver
+ *
+ * Copyright(C) 2010 Red Hat.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+MODULE_AUTHOR("Dave Airlie");
+MODULE_DESCRIPTION("MXM WMI Driver");
+MODULE_LICENSE("GPL");
+
+#define MXM_WMMX_GUID "F6CB5C3C-9CAE-4EBD-B577-931EA32A2CC0"
+
+MODULE_ALIAS("wmi:"MXM_WMMX_GUID);
+
+#define MXM_WMMX_FUNC_MXDS 0x5344584D /* "MXDS" */
+
+struct mxds_args {
+ u32 func;
+ u32 args;
+ u32 xarg;
+};
+
+int mxm_wmi_call_mxds(int adapter)
+{
+ struct mxds_args args = {
+ .func = MXM_WMMX_FUNC_MXDS,
+ .args = 0,
+ .xarg = 1,
+ };
+ struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+ acpi_status status;
+
+ printk("calling mux switch %d\n", adapter);
+
+ status = wmi_evaluate_method(MXM_WMMX_GUID, 0x1, adapter, &input,
+ &output);
+
+ if (ACPI_FAILURE(status))
+ return status;
+
+ printk("mux switched %d\n", status);
+ return 0;
+
+}
+EXPORT_SYMBOL_GPL(mxm_wmi_call_mxds);
+
+bool mxm_wmi_supported(void)
+{
+ bool guid_valid;
+ guid_valid = wmi_has_guid(MXM_WMMX_GUID);
+ return guid_valid;
+}
+EXPORT_SYMBOL_GPL(mxm_wmi_supported);
+
+static int __init mxm_wmi_init(void)
+{
+ return 0;
+}
+
+static void __exit mxm_wmi_exit(void)
+{
+}
+
+module_init(mxm_wmi_init);
+module_exit(mxm_wmi_exit);
diff --git a/include/linux/mxm-wmi.h b/include/linux/mxm-wmi.h
new file mode 100644
index 000000000000..51359c0718bf
--- /dev/null
+++ b/include/linux/mxm-wmi.h
@@ -0,0 +1,32 @@
+/*
+ * MXM WMI driver
+ *
+ * Copyright(C) 2010 Red Hat.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef MXM_WMI_H
+#define MXM_WMI_H
+
+/* discrete adapters */
+#define MXM_MXDS_ADAPTER_0 0x0
+#define MXM_MXDS_ADAPTER_1 0x0
+/* integrated adapter */
+#define MXM_MXDS_ADAPTER_IGD 0x10
+int mxm_wmi_call_mxds(int adapter);
+bool mxm_wmi_supported(void);
+
+#endif