add amdgpu_acpi_is_s0ix_supported() to check the platform
whether support s0i3.
Signed-off-by: Prike Liang <Prike.Liang@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Acked-by: Huang Rui <ray.huang@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++
drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 14 ++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 20400ec..83ac06a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1314,9 +1314,11 @@ int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev);
void amdgpu_acpi_get_backlight_caps(struct amdgpu_device *adev,
struct amdgpu_dm_backlight_caps *caps);
+bool amdgpu_acpi_is_s0ix_supported(void);
#else
static inline int amdgpu_acpi_init(struct amdgpu_device *adev) { return 0; }
static inline void amdgpu_acpi_fini(struct amdgpu_device *adev) { }
+static inline bool amdgpu_acpi_is_s0ix_supported(void) { 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 165b02e..fd66ac0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
@@ -27,6 +27,7 @@
#include <linux/power_supply.h>
#include <linux/pm_runtime.h>
#include <acpi/video.h>
+#include <acpi/actbl.h>
#include <drm/drm_crtc_helper.h>
#include "amdgpu.h"
@@ -894,3 +895,16 @@ void amdgpu_acpi_fini(struct amdgpu_device *adev)
unregister_acpi_notifier(&adev->acpi_nb);
kfree(adev->atif);
}
+
+/**
+ * amdgpu_acpi_is_s0ix_supported
+ *
+ * returns true if supported, false if not.
+ */
+bool amdgpu_acpi_is_s0ix_supported()
+{
+ if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)
+ return true;
+
+ return false;
+}
--
2.7.4
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