drm/amdgpu: Add runtime VCN PG support

Enable support for dynamically powering up/down VCN on demand.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 9 insertions, 7 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
index 60468385e6b4..8851bcdfc260 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
@@ -212,11 +212,11 @@ static void amdgpu_vcn_idle_work_handler(struct work_struct *work)
         }
 
         if (fences == 0) {
-                if (adev->pm.dpm_enabled) {
-                        /* might be used when with pg/cg
+                if (adev->pm.dpm_enabled)
                         amdgpu_dpm_enable_uvd(adev, false);
-                        */
-                }
+                else
+                        amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_VCN,
+                                                               AMD_PG_STATE_GATE);
         } else {
                 schedule_delayed_work(&adev->vcn.idle_work, VCN_IDLE_TIMEOUT);
         }
@@ -228,9 +228,11 @@ void amdgpu_vcn_ring_begin_use(struct amdgpu_ring *ring)
         bool set_clocks = !cancel_delayed_work_sync(&adev->vcn.idle_work);
 
         if (set_clocks && adev->pm.dpm_enabled) {
-                /* might be used when with pg/cg
-                amdgpu_dpm_enable_uvd(adev, true);
-                */
+                if (adev->pm.dpm_enabled)
+                        amdgpu_dpm_enable_uvd(adev, true);
+                else
+                        amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_VCN,
+                                                               AMD_PG_STATE_UNGATE);
         }
 }