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From 0873305b912e5039e4d9bf2f81de3bc9cf9eae07 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 5 May 2021 09:20:32 -0400
Subject: [PATCH] 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>
---
drivers/acpi/x86/s2idle.c | 4 ++++
1 file changed, 4 insertions(+)
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);
--
GitLab
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