drm/amdgpu: add debugfs access to the IP discovery table

Useful for debugging and new asic validation.
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -830,6 +830,7 @@ struct amdgpu_device {
 	struct notifier_block		acpi_nb;
 	struct amdgpu_i2c_chan		*i2c_bus[AMDGPU_MAX_I2C_BUS];
 	struct debugfs_blob_wrapper     debugfs_vbios_blob;
+	struct debugfs_blob_wrapper     debugfs_discovery_blob;
 	struct mutex			srbm_mutex;
 	/* GRBM index mutex. Protects concurrent access to GRBM index */
 	struct mutex                    grbm_idx_mutex;

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

@@ -1757,6 +1757,11 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev)
 	debugfs_create_blob("amdgpu_vbios", 0444, root,
 			    &adev->debugfs_vbios_blob);
 
+	adev->debugfs_discovery_blob.data = adev->mman.discovery_bin;
+	adev->debugfs_discovery_blob.size = adev->mman.discovery_tmr_size;
+	debugfs_create_blob("amdgpu_discovery", 0444, root,
+			    &adev->debugfs_discovery_blob);
+
 	return 0;
 }