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drm/nouveau/mxm: implement _DSM shadow method

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-11-07 13:36:08 +10:00
parent 93d9206d08
commit 3952315b9d
1 changed files with 60 additions and 1 deletions
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61
drivers/gpu/drm/nouveau/nouveau_mxm.c
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@ -476,11 +476,68 @@ mxm_shadow_rom(struct drm_device *dev, u8 version)
return false;
}
#if defined(CONFIG_ACPI)
static bool
mxm_shadow_dsm(struct drm_device *dev, u8 version)
{
return false;
struct drm_nouveau_private *dev_priv = dev->dev_private;
static char muid[] = {
0x00, 0xA4, 0x04, 0x40, 0x7D, 0x91, 0xF2, 0x4C,
0xB8, 0x9C, 0x79, 0xB6, 0x2F, 0xD5, 0x56, 0x65
};
u32 mxms_args[] = { 0x00000000 };
union acpi_object args[4] = {
/* _DSM MUID */
{ .buffer.type = 3,
.buffer.length = sizeof(muid),
.buffer.pointer = muid,
},
/* spec says this can be zero to mean "highest revision", but
* of course there's at least one bios out there which fails
* unless you pass in exactly the version it supports..
*/
{ .integer.type = ACPI_TYPE_INTEGER,
.integer.value = (version & 0xf0) << 4 | (version & 0x0f),
},
/* MXMS function */
{ .integer.type = ACPI_TYPE_INTEGER,
.integer.value = 0x00000010,
},
/* Pointer to MXMS arguments */
{ .buffer.type = ACPI_TYPE_BUFFER,
.buffer.length = sizeof(mxms_args),
.buffer.pointer = (char *)mxms_args,
},
};
struct acpi_object_list list = { ARRAY_SIZE(args), args };
struct acpi_buffer retn = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
acpi_handle handle;
int ret;
handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
if (!handle)
return false;
ret = acpi_evaluate_object(handle, "_DSM", &list, &retn);
if (ret) {
MXM_DBG(dev, "DSM MXMS failed: %d\n", ret);
return false;
}
obj = retn.pointer;
if (obj->type == ACPI_TYPE_BUFFER) {
dev_priv->mxms = kmemdup(obj->buffer.pointer,
obj->buffer.length, GFP_KERNEL);
} else
if (obj->type == ACPI_TYPE_INTEGER) {
MXM_DBG(dev, "DSM MXMS returned 0x%llx\n", obj->integer.value);
}
kfree(obj);
return dev_priv->mxms != NULL;
}
#endif
#if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE)
@ -521,7 +578,9 @@ struct mxm_shadow_h {
bool (*exec)(struct drm_device *, u8 version);
} _mxm_shadow[] = {
{ "ROM", mxm_shadow_rom },
#if defined(CONFIG_ACPI)
{ "DSM", mxm_shadow_dsm },
#endif
#if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE)
{ "WMI", mxm_shadow_wmi },
#endif