diff options
Diffstat (limited to 'drivers/acpi/x86')
| -rw-r--r-- | drivers/acpi/x86/s2idle.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c index 3f2a90648ec9..816bf2c34b7a 100644 --- a/drivers/acpi/x86/s2idle.c +++ b/drivers/acpi/x86/s2idle.c @@ -371,12 +371,27 @@ static int lps0_device_attach(struct acpi_device *adev, return 0; if (acpi_s2idle_vendor_amd()) { + /* AMD0004, AMDI0005: + * - Should use rev_id 0x0 + * - function mask > 0x3: Should use AMD method, but has off by one bug + * - function mask = 0x3: Should use Microsoft method + * AMDI0006: + * - should use rev_id 0x0 + * - function mask = 0x3: Should use Microsoft method + */ + const char *hid = acpi_device_hid(adev); rev_id = 0; lps0_dsm_func_mask = validate_dsm(adev->handle, ACPI_LPS0_DSM_UUID_AMD, rev_id, &lps0_dsm_guid); lps0_dsm_func_mask_microsoft = validate_dsm(adev->handle, ACPI_LPS0_DSM_UUID_MICROSOFT, rev_id, &lps0_dsm_guid_microsoft); + if (lps0_dsm_func_mask > 0x3 && (!strcmp(hid, "AMD0004") || + !strcmp(hid, "AMDI0005"))) { + lps0_dsm_func_mask = (lps0_dsm_func_mask << 1) | 0x1; + acpi_handle_debug(adev->handle, "_DSM UUID %s: Adjusted function mask: 0x%x\n", + ACPI_LPS0_DSM_UUID_AMD, lps0_dsm_func_mask); + } } else { rev_id = 1; lps0_dsm_func_mask = validate_dsm(adev->handle, |