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    Subject[PATCH 5.13 210/800] ACPI: PM: s2idle: Add missing LPS0 functions for AMD
    Date
    From: Alex Deucher <alexander.deucher@amd.com>

    [ Upstream commit f59a905b962c34642e862b5edec35c0eda72d70d ]

    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>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    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);
    --
    2.30.2


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