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 <[e-mail]>
Reviewed-by: Alex Deucher <[e-mail]>
Acked-by: Christian König <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 {
 	int ret = 0;
 
-	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",
-			  enable ? "enable" : "disable", ret);
+	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);
+		}
 
-	/* enable/disable Low Memory PState for UVD (4k videos) */
-	if (adev->asic_type == CHIP_STONEY &&
-		adev->uvd.decode_image_width >= WIDTH_4K) {
-		struct pp_hwmgr *hwmgr = adev->powerplay.pp_handle;
+		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",
+				  enable ? "enable" : "disable", ret);
 
-		if (hwmgr && hwmgr->hwmgr_func &&
-		    hwmgr->hwmgr_func->update_nbdpm_pstate)
-			hwmgr->hwmgr_func->update_nbdpm_pstate(hwmgr,
-							       !enable,
-							       true);
+		/* enable/disable Low Memory PState for UVD (4k videos) */
+		if (adev->asic_type == CHIP_STONEY &&
+			adev->uvd.decode_image_width >= WIDTH_4K) {
+			struct pp_hwmgr *hwmgr = adev->powerplay.pp_handle;
+
+			if (hwmgr && hwmgr->hwmgr_func &&
+			    hwmgr->hwmgr_func->update_nbdpm_pstate)
+				hwmgr->hwmgr_func->update_nbdpm_pstate(hwmgr,
+								       !enable,
+								       true);
+		}
 	}
 }
 
···
 {
 	int ret = 0;
 
-	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);
+	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

···
 	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;
···
 		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);