drm/amdgpu: switch to cached fw flags for sram ecc cap

Check cached firmware_flags to determine whether
sram ecc is supported or not.
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c

@@ -437,33 +437,19 @@ bool amdgpu_atomfirmware_mem_ecc_supported(struct amdgpu_device *adev)
 }
 
 /*
+ * Helper function to query sram ecc capablity
+ *
+ * @adev: amdgpu_device pointer
+ *
  * Return true if vbios supports sram ecc or false if not
  */
 bool amdgpu_atomfirmware_sram_ecc_supported(struct amdgpu_device *adev)
 {
-	struct amdgpu_mode_info *mode_info = &adev->mode_info;
-	int index;
-	u16 data_offset, size;
-	union firmware_info *firmware_info;
-	u8 frev, crev;
-	bool sram_ecc_supported = false;
-
-	index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
-			firmwareinfo);
+	u32 fw_cap;
 
-	if (amdgpu_atom_parse_data_header(adev->mode_info.atom_context,
-				index, &size, &frev, &crev, &data_offset)) {
-		/* support firmware_info 3.1 + */
-		if ((frev == 3 && crev >=1) || (frev > 3)) {
-			firmware_info = (union firmware_info *)
-				(mode_info->atom_context->bios + data_offset);
-			sram_ecc_supported =
-				(le32_to_cpu(firmware_info->v31.firmware_capability) &
-				 ATOM_FIRMWARE_CAP_SRAM_ECC) ? true : false;
-		}
-	}
+	fw_cap = adev->mode_info.firmware_flags;
 
-	return sram_ecc_supported;
+	return (fw_cap & ATOM_FIRMWARE_CAP_SRAM_ECC) ? true : false;
 }
 
 union smu_info {