[PATCH] drm/amdgpu: Poweroff uvd/vce/vcn/acp block if they were disabled by user

[Rex Zhu]

If user disable uvd/vce/vcn/acp blocks via module
parameter ip_block_mask,
driver power off thoser blocks to save power.

Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 1e4dd09..3ffee08 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1774,6 +1774,24 @@ static int amdgpu_device_set_pg_state(struct amdgpu_device *adev, enum amd_power
 
 	for (j = 0; j < adev->num_ip_blocks; j++) {
 		i = state == AMD_PG_STATE_GATE ? j : adev->num_ip_blocks - j - 1;
+
+		/* try to power off VCE/UVD/VCN/ACP if they were disabled by user */
+		if ((adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_UVD ||
+		    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_VCE ||
+		    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_VCN ||
+		    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_ACP) &&
+		    adev->ip_blocks[i].version->funcs->set_powergating_state) {
+			if (!adev->ip_blocks[i].status.valid) {
+				r = adev->ip_blocks[i].version->funcs->set_powergating_state((void *)adev,
+											state);
+				if (r) {
+					DRM_ERROR("set_powergating_state(gate) of IP block <%s> failed %d\n",
+					  adev->ip_blocks[i].version->funcs->name, r);
+					return r;
+				}
+			}
+		}
+
 		if (!adev->ip_blocks[i].status.late_initialized)
 			continue;
 		/* skip CG for VCE/UVD, it's handled specially */
@@ -1791,6 +1809,7 @@ static int amdgpu_device_set_pg_state(struct amdgpu_device *adev, enum amd_power
 			}
 		}
 	}
+
 	return 0;
 }
 
-- 
1.9.1