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    Subject[PATCH 5.15 048/196] drm/amd: add support to check whether the system is set to s3
    Date
    From: Mario Limonciello <mario.limonciello@amd.com>

    [ Upstream commit f52a2b8badbd24faf73a13c9c07fdb9d07352944 ]

    This will be used to help make decisions on what to do in
    misconfigured systems.

    v2: squash in semicolon fix from Stephen Rothwell

    Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
    Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++
    drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 13 +++++++++++++
    2 files changed, 15 insertions(+)

    diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
    index c8d31a22176f3..7e73ac6fb21db 100644
    --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
    +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
    @@ -1410,9 +1410,11 @@ static inline int amdgpu_acpi_smart_shift_update(struct drm_device *dev,
    #endif

    #if defined(CONFIG_ACPI) && defined(CONFIG_SUSPEND)
    +bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev);
    bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev);
    #else
    static inline bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev) { return false; }
    +static inline bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev) { return false; }
    #endif

    int amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,
    diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
    index b19d407518024..0e12315fa0cb8 100644
    --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
    +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
    @@ -1032,6 +1032,19 @@ void amdgpu_acpi_detect(void)
    }

    #if IS_ENABLED(CONFIG_SUSPEND)
    +/**
    + * amdgpu_acpi_is_s3_active
    + *
    + * @adev: amdgpu_device_pointer
    + *
    + * returns true if supported, false if not.
    + */
    +bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
    +{
    + return !(adev->flags & AMD_IS_APU) ||
    + (pm_suspend_target_state == PM_SUSPEND_MEM);
    +}
    +
    /**
    * amdgpu_acpi_is_s0ix_active
    *
    --
    2.34.1


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