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ACPI: x86: s2idle: Add module parameter to prefer Microsoft GUID

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OEMs have made some mistakes in the past for the AMD GUID support
and not populated the method properly.  To add an escape hatch for
this problem introduce a module parameter that can force using
the Microsoft GUID.

This is intentionally introduced to both Intel and AMD codepaths
to allow using the parameter as a debugging tactic on either.

Reviewed-by: Philipp Zabel <philipp.zabel@gmail.com>
Tested-by: Philipp Zabel <philipp.zabel@gmail.com> # GA402RJ
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Mario Limonciello 2022-09-21 15:40:50 -05:00 committed by Rafael J. Wysocki
parent fd894f05cf
commit a0bc002393
1 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/acpi/x86/s2idle.c
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@ -27,6 +27,10 @@ static bool sleep_no_lps0 __read_mostly;
module_param(sleep_no_lps0, bool, 0644);
MODULE_PARM_DESC(sleep_no_lps0, "Do not use the special LPS0 device interface");
static bool prefer_microsoft_dsm_guid __read_mostly;
module_param(prefer_microsoft_dsm_guid, bool, 0644);
MODULE_PARM_DESC(prefer_microsoft_dsm_guid, "Prefer using Microsoft GUID in LPS0 device _DSM evaluation");
static const struct acpi_device_id lps0_device_ids[] = {
{"PNP0D80", },
{"", },
@ -402,6 +406,9 @@ static int lps0_device_attach(struct acpi_device *adev,
if (lps0_device_handle)
return 0;
lps0_dsm_func_mask_microsoft = validate_dsm(adev->handle,
ACPI_LPS0_DSM_UUID_MICROSOFT, 0,
&lps0_dsm_guid_microsoft);
if (acpi_s2idle_vendor_amd()) {
static const struct acpi_device_id *dev_id;
const struct amd_lps0_hid_device_data *data;
@ -416,16 +423,12 @@ static int lps0_device_attach(struct acpi_device *adev,
rev_id = data->rev_id;
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, 0,
&lps0_dsm_guid_microsoft);
if (lps0_dsm_func_mask > 0x3 && data->check_off_by_one) {
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 if (lps0_dsm_func_mask_microsoft > 0 && data->prefer_amd_guid &&
(!strcmp(hid, "AMDI0007") ||
!strcmp(hid, "AMDI0008"))) {
!prefer_microsoft_dsm_guid) {
lps0_dsm_func_mask_microsoft = -EINVAL;
acpi_handle_debug(adev->handle, "_DSM Using AMD method\n");
}
@ -433,7 +436,8 @@ static int lps0_device_attach(struct acpi_device *adev,
rev_id = 1;
lps0_dsm_func_mask = validate_dsm(adev->handle,
ACPI_LPS0_DSM_UUID, rev_id, &lps0_dsm_guid);
lps0_dsm_func_mask_microsoft = -EINVAL;
if (!prefer_microsoft_dsm_guid)
lps0_dsm_func_mask_microsoft = -EINVAL;
}
if (lps0_dsm_func_mask < 0 && lps0_dsm_func_mask_microsoft < 0)