diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_mxm.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_mxm.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_mxm.c b/drivers/gpu/drm/nouveau/nouveau_mxm.c index e5a64f0f4cb..07d0d1e0369 100644 --- a/drivers/gpu/drm/nouveau/nouveau_mxm.c +++ b/drivers/gpu/drm/nouveau/nouveau_mxm.c @@ -582,6 +582,35 @@ mxm_shadow_dsm(struct drm_device *dev, u8 version) #define WMI_WMMX_GUID "F6CB5C3C-9CAE-4EBD-B577-931EA32A2CC0" +static u8 +wmi_wmmx_mxmi(struct drm_device *dev, u8 version) +{ + u32 mxmi_args[] = { 0x494D584D /* MXMI */, version, 0 }; + struct acpi_buffer args = { sizeof(mxmi_args), mxmi_args }; + struct acpi_buffer retn = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj; + acpi_status status; + + status = wmi_evaluate_method(WMI_WMMX_GUID, 0, 0, &args, &retn); + if (ACPI_FAILURE(status)) { + MXM_DBG(dev, "WMMX MXMI returned %d\n", status); + return 0x00; + } + + obj = retn.pointer; + if (obj->type == ACPI_TYPE_INTEGER) { + version = obj->integer.value; + MXM_DBG(dev, "WMMX MXMI version %d.%d\n", + (version >> 4), version & 0x0f); + } else { + version = 0; + MXM_DBG(dev, "WMMX MXMI returned non-integer\n"); + } + + kfree(obj); + return version; +} + static bool mxm_shadow_wmi(struct drm_device *dev, u8 version) { @@ -592,7 +621,15 @@ mxm_shadow_wmi(struct drm_device *dev, u8 version) union acpi_object *obj; acpi_status status; - if (!wmi_has_guid(WMI_WMMX_GUID)) + if (!wmi_has_guid(WMI_WMMX_GUID)) { + MXM_DBG(dev, "WMMX GUID not found\n"); + return false; + } + + mxms_args[1] = wmi_wmmx_mxmi(dev, 0x00); + if (!mxms_args[1]) + mxms_args[1] = wmi_wmmx_mxmi(dev, version); + if (!mxms_args[1]) return false; status = wmi_evaluate_method(WMI_WMMX_GUID, 0, 0, &args, &retn); |