[PATCH 33/44] drm/amdgpu/vcn: add a generic helper for set_power_gating_state

[Alex Deucher <alexander.deucher@amd.com>]

It's common for all VCN variants.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c | 23 +++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h |  3 +++
 2 files changed, 26 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
index 81bfd8a9d8268..e4ef0fb970b29 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
@@ -1397,3 +1397,26 @@ void amdgpu_debugfs_vcn_sched_mask_init(struct amdgpu_device *adev)
 			    &amdgpu_debugfs_vcn_sched_mask_fops);
 #endif
 }
+
+/**
+ * vcn_set_powergating_state - set VCN block powergating state
+ *
+ * @ip_block: amdgpu_ip_block pointer
+ * @state: power gating state
+ *
+ * Set VCN block powergating state
+ */
+int vcn_set_powergating_state(struct amdgpu_ip_block *ip_block,
+			      enum amd_powergating_state state)
+{
+	struct amdgpu_device *adev = ip_block->adev;
+	int ret = 0, i;
+
+	for (i = 0; i < adev->vcn.num_vcn_inst; ++i) {
+		struct amdgpu_vcn_inst *vinst = &adev->vcn.inst[i];
+
+		ret |= vinst->set_pg_state(vinst, state);
+	}
+
+	return ret;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
index 508fa022df78c..a023f46ec904a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
@@ -546,4 +546,7 @@ int amdgpu_vcn_sysfs_reset_mask_init(struct amdgpu_device *adev);
 void amdgpu_vcn_sysfs_reset_mask_fini(struct amdgpu_device *adev);
 void amdgpu_debugfs_vcn_sched_mask_init(struct amdgpu_device *adev);
 
+int vcn_set_powergating_state(struct amdgpu_ip_block *ip_block,
+			      enum amd_powergating_state state);
+
 #endif
-- 
2.48.1