drm/amdgpu: SI support for UVD and VCE power managment

Port functionality from the Radeon driver to support
UVD and VCE power management.
Signed-off-by: Alex Jivin <alex.jivin@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@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_pm.c

@@ -3558,6 +3558,20 @@ void amdgpu_dpm_enable_uvd(struct amdgpu_device *adev, bool enable)
 {
 	int ret = 0;
 
+	if (adev->family == AMDGPU_FAMILY_SI) {
+		if (enable) {
+			mutex_lock(&adev->pm.mutex);
+			adev->pm.dpm.uvd_active = true;
+			adev->pm.dpm.state = POWER_STATE_TYPE_INTERNAL_UVD;
+			mutex_unlock(&adev->pm.mutex);
+		} else {
+			mutex_lock(&adev->pm.mutex);
+			adev->pm.dpm.uvd_active = false;
+			mutex_unlock(&adev->pm.mutex);
+		}
+
+		amdgpu_pm_compute_clocks(adev);
+	} else {
 		ret = amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_UVD, !enable);
 		if (ret)
 			DRM_ERROR("Dpm %s uvd failed, ret = %d. \n",
@@ -3574,16 +3588,33 @@ void amdgpu_dpm_enable_uvd(struct amdgpu_device *adev, bool enable)
 								       !enable,
 								       true);
 		}
+	}
 }
 
 void amdgpu_dpm_enable_vce(struct amdgpu_device *adev, bool enable)
 {
 	int ret = 0;
 
+	if (adev->family == AMDGPU_FAMILY_SI) {
+		if (enable) {
+			mutex_lock(&adev->pm.mutex);
+			adev->pm.dpm.vce_active = true;
+			/* XXX select vce level based on ring/task */
+			adev->pm.dpm.vce_level = AMD_VCE_LEVEL_AC_ALL;
+			mutex_unlock(&adev->pm.mutex);
+		} else {
+			mutex_lock(&adev->pm.mutex);
+			adev->pm.dpm.vce_active = false;
+			mutex_unlock(&adev->pm.mutex);
+		}
+
+		amdgpu_pm_compute_clocks(adev);
+	} else {
 		ret = amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_VCE, !enable);
 		if (ret)
 			DRM_ERROR("Dpm %s vce failed, ret = %d. \n",
 				  enable ? "enable" : "disable", ret);
+	}
 }
 
 void amdgpu_pm_print_power_states(struct amdgpu_device *adev)

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

@@ -6953,6 +6953,24 @@ static int si_power_control_set_level(struct amdgpu_device *adev)
 	return 0;
 }
 
+static void si_set_vce_clock(struct amdgpu_device *adev,
+			     struct amdgpu_ps *new_rps,
+			     struct amdgpu_ps *old_rps)
+{
+	if ((old_rps->evclk != new_rps->evclk) ||
+	    (old_rps->ecclk != new_rps->ecclk)) {
+		/* Turn the clocks on when encoding, off otherwise */
+		if (new_rps->evclk || new_rps->ecclk) {
+			/* Place holder for future VCE1.0 porting to amdgpu
+			vce_v1_0_enable_mgcg(adev, false, false);*/
+		} else {
+			/* Place holder for future VCE1.0 porting to amdgpu
+			vce_v1_0_enable_mgcg(adev, true, false);
+			amdgpu_asic_set_vce_clocks(adev, new_rps->evclk, new_rps->ecclk);*/
+		}
+	}
+}
+
 static int si_dpm_set_power_state(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
@@ -7029,6 +7047,7 @@ static int si_dpm_set_power_state(void *handle)
 		return ret;
 	}
 	ni_set_uvd_clock_after_set_eng_clock(adev, new_ps, old_ps);
+	si_set_vce_clock(adev, new_ps, old_ps);
 	if (eg_pi->pcie_performance_request)
 		si_notify_link_speed_change_after_state_change(adev, new_ps, old_ps);
 	ret = si_set_power_state_conditionally_enable_ulv(adev, new_ps);