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Commit 000703f4 authored by Dave Airlie's avatar Dave Airlie
Browse files

mxm/wmi: add MXMX interface entry point. 



The MXMX method appears to be a mutex of some sort.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent f19467c5

drivers/gpu/drm/nouveau/nouveau_acpi.c

+1 −0
Original line number Diff line number Diff line
@@ -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);

}

drivers/platform/x86/mxm-wmi.c

+27 −1
Original line number Diff line number Diff line
@@ -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;
@@ -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;

include/linux/mxm-wmi.h

+1 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
/* integrated adapter */

#define MXM_MXDS_ADAPTER_IGD 0x10

int mxm_wmi_call_mxds(int adapter);

int mxm_wmi_call_mxmx(int adapter);

bool mxm_wmi_supported(void);



#endif