drm/amdgpu: introduce runtime pm mode

It can benefit code consistency in future.
Suggested-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c

@@ -161,10 +161,12 @@ int amdgpu_driver_load_kms(struct amdgpu_device *adev, unsigned long flags)
 	if (amdgpu_device_supports_px(dev) &&
 	    (amdgpu_runtime_pm != 0)) { /* enable runpm by default for atpx */
 		adev->runpm = true;
+		adev->pm.rpm_mode = AMDGPU_RUNPM_PX;
 		dev_info(adev->dev, "Using ATPX for runtime pm\n");
 	} else if (amdgpu_device_supports_boco(dev) &&
 		   (amdgpu_runtime_pm != 0)) { /* enable runpm by default for boco */
 		adev->runpm = true;
+		adev->pm.rpm_mode = AMDGPU_RUNPM_BOCO;
 		dev_info(adev->dev, "Using BOCO for runtime pm\n");
 	} else if (amdgpu_device_supports_baco(dev) &&
 		   (amdgpu_runtime_pm != 0)) {
@@ -188,9 +190,11 @@ int amdgpu_driver_load_kms(struct amdgpu_device *adev, unsigned long flags)
 
 		amdgpu_runtime_pm_quirk(adev);
 
-		if (adev->runpm)
+		if (adev->runpm) {
+			adev->pm.rpm_mode = AMDGPU_RUNPM_BACO;
 			dev_info(adev->dev, "Using BACO for runtime pm\n");
 		}
+	}
 
 	/* Call ACPI methods: require modeset init
 	 * but failure is not fatal

drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h

@@ -45,6 +45,13 @@ enum amdgpu_int_thermal_type {
 	THERMAL_TYPE_KV,
 };
 
+enum amdgpu_runpm_mode {
+	AMDGPU_RUNPM_NONE,
+	AMDGPU_RUNPM_PX,
+	AMDGPU_RUNPM_BOCO,
+	AMDGPU_RUNPM_BACO,
+};
+
 struct amdgpu_ps {
 	u32 caps; /* vbios flags */
 	u32 class; /* vbios flags */
@@ -355,6 +362,8 @@ struct amdgpu_pm {
 	struct amdgpu_ctx       *stable_pstate_ctx;
 
 	struct config_table_setting config_table;
+	/* runtime mode */
+	enum amdgpu_runpm_mode rpm_mode;
 };
 
 int amdgpu_dpm_read_sensor(struct amdgpu_device *adev, enum amd_pp_sensors sensor,