[PATCH 3/4] drm/amdgpu: add helper to verify ip discovery binary signature

[Hawking Zhang <Hawking.Zhang@xxxxxxx>]

To be used to check ip discovery binary signature

Signed-off-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
index cf9f09044eb5..f507cd70ab86 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
@@ -233,6 +233,14 @@ static inline bool amdgpu_discovery_verify_checksum(uint8_t *data, uint32_t size
 	return !!(amdgpu_discovery_calculate_checksum(data, size) == expected);
 }
 
+static inline bool amdgpu_discovery_verify_binary_signature(uint8_t *binary)
+{
+	struct binary_header *bhdr;
+	bhdr = (struct binary_header *)binary;
+
+	return (le32_to_cpu(bhdr->binary_signature) == BINARY_SIGNATURE);
+}
+
 static int amdgpu_discovery_init(struct amdgpu_device *adev)
 {
 	struct table_info *info;
-- 
2.17.1