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authorMario Limonciello <mario.limonciello@amd.com>2022-12-15 22:16:15 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2022-12-22 19:39:31 +0300
commit3ea45390e9c0d35805ef8357ace55594fd4233d0 (patch)
treef4f25bb9e924c7deac141adc6fdb25791b084a99 /drivers/acpi/x86
parent057b40f43ce429a02e793adf3cfbf2446a19a38e (diff)
downloadlinux-3ea45390e9c0d35805ef8357ace55594fd4233d0.tar.xz
ACPI: x86: s2idle: Force AMD GUID/_REV 2 on HP Elitebook 865
HP Elitebook 865 supports both the AMD GUID w/ _REV 2 and Microsoft GUID with _REV 0. Both have very similar code but the AMD GUID has a special workaround that is specific to a problem with spurious wakeups on systems with Qualcomm WLAN. This is believed to be a bug in the Qualcomm WLAN F/W (it doesn't affect any other WLAN H/W). If this WLAN firmware is fixed this quirk can be dropped. Cc: stable@vger.kernel.org # 6.1 Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/x86')
-rw-r--r--drivers/acpi/x86/s2idle.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c
index 5350c73564b6..422415cb14f4 100644
--- a/drivers/acpi/x86/s2idle.c
+++ b/drivers/acpi/x86/s2idle.c
@@ -401,6 +401,13 @@ static const struct acpi_device_id amd_hid_ids[] = {
{}
};
+static int lps0_prefer_amd(const struct dmi_system_id *id)
+{
+ pr_debug("Using AMD GUID w/ _REV 2.\n");
+ rev_id = 2;
+ return 0;
+}
+
static int lps0_prefer_microsoft(const struct dmi_system_id *id)
{
pr_debug("Preferring Microsoft GUID.\n");
@@ -462,6 +469,19 @@ static const struct dmi_system_id s2idle_dmi_table[] __initconst = {
DMI_MATCH(DMI_PRODUCT_NAME, "ROG Flow X16 GV601"),
},
},
+ {
+ /*
+ * AMD Rembrandt based HP EliteBook 835/845/865 G9
+ * Contains specialized AML in AMD/_REV 2 path to avoid
+ * triggering a bug in Qualcomm WLAN firmware. This may be
+ * removed in the future if that firmware is fixed.
+ */
+ .callback = lps0_prefer_amd,
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "HP"),
+ DMI_MATCH(DMI_BOARD_NAME, "8990"),
+ },
+ },
{}
};