drm/amdgpu:Add DPG pause state

Add DPG pause state to support VCN DPG mode.
Signed-off-by: James Zhu <James.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h

@@ -56,6 +56,16 @@ enum engine_status_constants {
 	UVD_STATUS__RBC_BUSY = 0x1,
 };
 
+enum internal_dpg_state {
+	VCN_DPG_STATE__UNPAUSE = 0,
+	VCN_DPG_STATE__PAUSE,
+};
+
+struct dpg_pause_state {
+	enum internal_dpg_state fw_based;
+	enum internal_dpg_state jpeg;
+};
+
 struct amdgpu_vcn {
 	struct amdgpu_bo	*vcpu_bo;
 	void			*cpu_addr;
@@ -70,6 +80,7 @@ struct amdgpu_vcn {
 	struct amdgpu_irq_src	irq;
 	unsigned		num_enc_rings;
 	enum amd_powergating_state cur_state;
+	struct dpg_pause_state pause_state;
 };
 
 int amdgpu_vcn_sw_init(struct amdgpu_device *adev);