tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
+29
-1
+1
drivers/gpu/drm/nouveau/nouveau_acpi.c
+1
drivers/gpu/drm/nouveau/nouveau_acpi.c
···
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static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
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{
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+
mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
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mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
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return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id, NULL);
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}
+27
-1
drivers/platform/x86/mxm-wmi.c
+27
-1
drivers/platform/x86/mxm-wmi.c
···
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MODULE_ALIAS("wmi:"MXM_WMMX_GUID);
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#define MXM_WMMX_FUNC_MXDS 0x5344584D /* "MXDS" */
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+
#define MXM_WMMX_FUNC_MXMX 0x53445344 /* "MXMX" */
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struct mxds_args {
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u32 func;
···
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acpi_status status;
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printk("calling mux switch %d\n", adapter);
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-
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+
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status = wmi_evaluate_method(MXM_WMMX_GUID, 0x1, adapter, &input,
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&output);
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···
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}
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EXPORT_SYMBOL_GPL(mxm_wmi_call_mxds);
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+
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+
int mxm_wmi_call_mxmx(int adapter)
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+
{
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+
struct mxds_args args = {
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+
.func = MXM_WMMX_FUNC_MXMX,
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+
.args = 0,
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.xarg = 1,
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+
};
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+
struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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acpi_status status;
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+
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+
printk("calling mux switch %d\n", adapter);
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+
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+
status = wmi_evaluate_method(MXM_WMMX_GUID, 0x1, adapter, &input,
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&output);
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+
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+
if (ACPI_FAILURE(status))
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return status;
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+
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+
printk("mux mutex set switched %d\n", status);
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return 0;
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+
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+
}
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+
EXPORT_SYMBOL_GPL(mxm_wmi_call_mxmx);
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bool mxm_wmi_supported(void)
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{