From 000703f44c77b152cd966eaf06f4ab043274ff46 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Mon, 9 May 2011 11:40:25 +1000
Subject: mxm/wmi: add MXMX interface entry point.
The MXMX method appears to be a mutex of some sort.
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
drivers/gpu/drm/nouveau/nouveau_acpi.c | 1 +
drivers/platform/x86/mxm-wmi.c | 28 +++++++++++++++++++++++++++-
2 files changed, 28 insertions(+), 1 deletion(-)
(limited to 'drivers')
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index e0a885b72e0..f0d459bb46e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -150,6 +150,7 @@ static int nouveau_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
{
+ mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id, NULL);
}
diff --git a/drivers/platform/x86/mxm-wmi.c b/drivers/platform/x86/mxm-wmi.c
index 12b6f341e72..0aea63b3729 100644
--- a/drivers/platform/x86/mxm-wmi.c
+++ b/drivers/platform/x86/mxm-wmi.c
@@ -32,6 +32,7 @@ MODULE_LICENSE("GPL");
MODULE_ALIAS("wmi:"MXM_WMMX_GUID);
#define MXM_WMMX_FUNC_MXDS 0x5344584D /* "MXDS" */
+#define MXM_WMMX_FUNC_MXMX 0x53445344 /* "MXMX" */
struct mxds_args {
u32 func;
@@ -51,7 +52,7 @@ int mxm_wmi_call_mxds(int adapter)
acpi_status status;
printk("calling mux switch %d\n", adapter);
-
+
status = wmi_evaluate_method(MXM_WMMX_GUID, 0x1, adapter, &input,
&output);
@@ -64,6 +65,31 @@ int mxm_wmi_call_mxds(int adapter)
}
EXPORT_SYMBOL_GPL(mxm_wmi_call_mxds);
+int mxm_wmi_call_mxmx(int adapter)
+{
+ struct mxds_args args = {
+ .func = MXM_WMMX_FUNC_MXMX,
+ .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 mutex set switched %d\n", status);
+ return 0;
+
+}
+EXPORT_SYMBOL_GPL(mxm_wmi_call_mxmx);
+
bool mxm_wmi_supported(void)
{
bool guid_valid;
--
cgit v1.2.3-70-g09d2