drm/amdgpu: add support to power up/down UMSCH by SMU

Power up/down UMSCH by SMU.
Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Acked-by: Veerabadhran Gopalakrishnan <Veerabadhran.Gopalakrishnan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

@@ -299,6 +299,29 @@ static int smu_dpm_set_vpe_enable(struct smu_context *smu,
 	return ret;
 }
 
+static int smu_dpm_set_umsch_mm_enable(struct smu_context *smu,
+				   bool enable)
+{
+	struct smu_power_context *smu_power = &smu->smu_power;
+	struct smu_power_gate *power_gate = &smu_power->power_gate;
+	int ret = 0;
+
+	if (!smu->adev->enable_umsch_mm)
+		return 0;
+
+	if (!smu->ppt_funcs->dpm_set_umsch_mm_enable)
+		return 0;
+
+	if (atomic_read(&power_gate->umsch_mm_gated) ^ enable)
+		return 0;
+
+	ret = smu->ppt_funcs->dpm_set_umsch_mm_enable(smu, enable);
+	if (!ret)
+		atomic_set(&power_gate->umsch_mm_gated, !enable);
+
+	return ret;
+}
+
 /**
  * smu_dpm_set_power_gate - power gate/ungate the specific IP block
  *
@@ -1196,6 +1219,7 @@ static int smu_sw_init(void *handle)
 	atomic_set(&smu->smu_power.power_gate.vcn_gated, 1);
 	atomic_set(&smu->smu_power.power_gate.jpeg_gated, 1);
 	atomic_set(&smu->smu_power.power_gate.vpe_gated, 1);
+	atomic_set(&smu->smu_power.power_gate.umsch_mm_gated, 1);
 
 	smu->workload_mask = 1 << smu->workload_prority[PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT];
 	smu->workload_prority[PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT] = 0;
@@ -1549,6 +1573,7 @@ static int smu_hw_init(void *handle)
 		smu_dpm_set_vcn_enable(smu, true);
 		smu_dpm_set_jpeg_enable(smu, true);
 		smu_dpm_set_vpe_enable(smu, true);
+		smu_dpm_set_umsch_mm_enable(smu, true);
 		smu_set_gfx_cgpg(smu, true);
 	}
 
@@ -1726,6 +1751,7 @@ static int smu_hw_fini(void *handle)
 	smu_dpm_set_vcn_enable(smu, false);
 	smu_dpm_set_jpeg_enable(smu, false);
 	smu_dpm_set_vpe_enable(smu, false);
+	smu_dpm_set_umsch_mm_enable(smu, false);
 
 	adev->vcn.cur_state = AMD_PG_STATE_GATE;
 	adev->jpeg.cur_state = AMD_PG_STATE_GATE;

drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h

@@ -375,6 +375,7 @@ struct smu_power_gate {
 	atomic_t vcn_gated;
 	atomic_t jpeg_gated;
 	atomic_t vpe_gated;
+	atomic_t umsch_mm_gated;
 };
 
 struct smu_power_context {