[PATCH 13/15] drm/amdgpu: add new IP callback for per instance powergating

[Alex Deucher]

Entry point to powergate a particular instance of an IP.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h        |  4 +++
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 36 ++++++++++++++++++++++
 drivers/gpu/drm/amd/include/amd_shared.h   |  3 ++
 3 files changed, 43 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index acb6d49bd00c..9a74cf9962f7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -364,6 +364,10 @@ int amdgpu_device_ip_set_clockgating_state(void *dev,
 int amdgpu_device_ip_set_powergating_state(void *dev,
 					   enum amd_ip_block_type block_type,
 					   enum amd_powergating_state state);
+int amdgpu_device_ip_set_powergating_state_inst(void *dev,
+						enum amd_ip_block_type block_type,
+						enum amd_powergating_state state,
+						int inst);
 void amdgpu_device_ip_get_clockgating_state(struct amdgpu_device *adev,
 					    u64 *flags);
 int amdgpu_device_ip_wait_for_idle(struct amdgpu_device *adev,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 343c9f2ab1a0..6a1c6dae6309 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2164,6 +2164,42 @@ int amdgpu_device_ip_set_clockgating_state(void *dev,
 	return r;
 }
 
+/**
+ * amdgpu_device_ip_set_powergating_state_inst - set the PG state for an instance of an IP
+ *
+ * @dev: amdgpu_device pointer
+ * @block_type: Type of hardware IP (SMU, GFX, UVD, etc.)
+ * @state: powergating state (gate or ungate)
+ * @inst: IP instance to target
+ *
+ * Sets the requested powergating state for the selected instance of
+ * the hardware IP specified.
+ * Returns the error code from the last instance.
+ */
+int amdgpu_device_ip_set_powergating_state_inst(void *dev,
+						enum amd_ip_block_type block_type,
+						enum amd_powergating_state state,
+						int inst)
+{
+	struct amdgpu_device *adev = dev;
+	int i, r = 0;
+
+	for (i = 0; i < adev->num_ip_blocks; i++) {
+		if (!adev->ip_blocks[i].status.valid)
+			continue;
+		if (adev->ip_blocks[i].version->type != block_type)
+			continue;
+		if (!adev->ip_blocks[i].version->funcs->set_powergating_state_inst)
+			continue;
+		r = adev->ip_blocks[i].version->funcs->set_powergating_state_inst(
+			&adev->ip_blocks[i], state, inst);
+		if (r)
+			DRM_ERROR("set_powergating_state_inst of IP block <%s> %d failed %d\n",
+				  adev->ip_blocks[i].version->funcs->name, inst, r);
+	}
+	return r;
+}
+
 /**
  * amdgpu_device_ip_set_powergating_state - set the PG state
  *
diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h
index 98d9e840b0e2..a31a3018a5eb 100644
--- a/drivers/gpu/drm/amd/include/amd_shared.h
+++ b/drivers/gpu/drm/amd/include/amd_shared.h
@@ -405,6 +405,9 @@ struct amd_ip_funcs {
 				     enum amd_clockgating_state state);
 	int (*set_powergating_state)(struct amdgpu_ip_block *ip_block,
 				     enum amd_powergating_state state);
+	int (*set_powergating_state_inst)(struct amdgpu_ip_block *ip_block,
+					  enum amd_powergating_state state,
+					  int inst);
 	void (*get_clockgating_state)(void *handle, u64 *flags);
 	void (*dump_ip_state)(struct amdgpu_ip_block *ip_block);
 	void (*print_ip_state)(struct amdgpu_ip_block *ip_block, struct drm_printer *p);
-- 
2.47.0