From 3ea45390e9c0d35805ef8357ace55594fd4233d0 Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Thu, 15 Dec 2022 13:16:15 -0600 Subject: [PATCH] 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 Signed-off-by: Rafael J. Wysocki --- drivers/acpi/x86/s2idle.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c index 5350c73..422415c 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"), + }, + }, {} }; -- 2.7.4