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authorAlex Deucher <alexander.deucher@amd.com>2021-05-05 16:20:32 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-05-17 17:22:48 +0300
commitf59a905b962c34642e862b5edec35c0eda72d70d (patch)
treeab364587a27c4d009091f79b64d36e96d506b482 /drivers/acpi/x86
parentd07f6ca923ea0927a1024dfccafc5b53b61cfecc (diff)
downloadlinux-f59a905b962c34642e862b5edec35c0eda72d70d.tar.xz
ACPI: PM: s2idle: Add missing LPS0 functions for AMD
These are supposedly not required for AMD platforms, but at least some HP laptops seem to require it to properly turn off the keyboard backlight. Based on a patch from Marcin Bachry <hegel666@gmail.com>. Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1230 Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Alex Deucher <alexander.deucher@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.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c
index 2b69536cdccb..2d7ddb8a8cb6 100644
--- a/drivers/acpi/x86/s2idle.c
+++ b/drivers/acpi/x86/s2idle.c
@@ -42,6 +42,8 @@ static const struct acpi_device_id lps0_device_ids[] = {
/* AMD */
#define ACPI_LPS0_DSM_UUID_AMD "e3f32452-febc-43ce-9039-932122d37721"
+#define ACPI_LPS0_ENTRY_AMD 2
+#define ACPI_LPS0_EXIT_AMD 3
#define ACPI_LPS0_SCREEN_OFF_AMD 4
#define ACPI_LPS0_SCREEN_ON_AMD 5
@@ -408,6 +410,7 @@ int acpi_s2idle_prepare_late(void)
if (acpi_s2idle_vendor_amd()) {
acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF_AMD);
+ acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY_AMD);
} else {
acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF);
acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY);
@@ -422,6 +425,7 @@ void acpi_s2idle_restore_early(void)
return;
if (acpi_s2idle_vendor_amd()) {
+ acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT_AMD);
acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON_AMD);
} else {
acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT);