drm/amdgpu: enable pp_od_clk_voltage for gfx 9.4.3 SRIOV

v1:
enabel pp_od_clk_voltage node for gfx 9.4.3 SRIOV and BM.

v2:
add onevf check for gfx 9.4.3

v3:
refine code check order to make function clearly.
Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2034,6 +2034,31 @@ static int ss_bias_attr_update(struct amdgpu_device *adev, struct amdgpu_device_
 	return 0;
 }
 
+static int pp_od_clk_voltage_attr_update(struct amdgpu_device *adev, struct amdgpu_device_attr *attr,
+					 uint32_t mask, enum amdgpu_device_attr_states *states)
+{
+	uint32_t gc_ver = amdgpu_ip_version(adev, GC_HWIP, 0);
+
+	*states = ATTR_STATE_SUPPORTED;
+
+	if (!amdgpu_dpm_is_overdrive_supported(adev)) {
+		*states = ATTR_STATE_UNSUPPORTED;
+		return 0;
+	}
+
+	/* Enable pp_od_clk_voltage node for gc 9.4.3 SRIOV/BM support */
+	if (gc_ver == IP_VERSION(9, 4, 3)) {
+		if (amdgpu_sriov_vf(adev) && !amdgpu_sriov_is_pp_one_vf(adev))
+			*states = ATTR_STATE_UNSUPPORTED;
+		return 0;
+	}
+
+	if (!(attr->flags & mask))
+		*states = ATTR_STATE_UNSUPPORTED;
+
+	return 0;
+}
+
 /* Following items will be read out to indicate current plpd policy:
  *  - -1: none
  *  - 0: disallow
@@ -2118,7 +2143,8 @@ static struct amdgpu_device_attr amdgpu_device_attrs[] = {
 	AMDGPU_DEVICE_ATTR_RW(pp_sclk_od,				ATTR_FLAG_BASIC),
 	AMDGPU_DEVICE_ATTR_RW(pp_mclk_od,				ATTR_FLAG_BASIC),
 	AMDGPU_DEVICE_ATTR_RW(pp_power_profile_mode,			ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF),
-	AMDGPU_DEVICE_ATTR_RW(pp_od_clk_voltage,			ATTR_FLAG_BASIC),
+	AMDGPU_DEVICE_ATTR_RW(pp_od_clk_voltage,			ATTR_FLAG_BASIC,
+			      .attr_update = pp_od_clk_voltage_attr_update),
 	AMDGPU_DEVICE_ATTR_RO(gpu_busy_percent,				ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF),
 	AMDGPU_DEVICE_ATTR_RO(mem_busy_percent,				ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF),
 	AMDGPU_DEVICE_ATTR_RO(pcie_bw,					ATTR_FLAG_BASIC),
@@ -2163,10 +2189,6 @@ static int default_attr_update(struct amdgpu_device *adev, struct amdgpu_device_
 	} else if (DEVICE_ATTR_IS(pp_dpm_fclk)) {
 		if (mp1_ver < IP_VERSION(10, 0, 0))
 			*states = ATTR_STATE_UNSUPPORTED;
-	} else if (DEVICE_ATTR_IS(pp_od_clk_voltage)) {
-		*states = ATTR_STATE_UNSUPPORTED;
-		if (amdgpu_dpm_is_overdrive_supported(adev))
-			*states = ATTR_STATE_SUPPORTED;
 	} else if (DEVICE_ATTR_IS(mem_busy_percent)) {
 		if ((adev->flags & AMD_IS_APU &&
 		     gc_ver != IP_VERSION(9, 4, 3)) ||