diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h
index 5bdf1b4397a09ab6421834ca211bd2d9b3df1082..3698481598031654dc96acde46b1f52e7ba13e48 100644
--- a/drivers/gpu/drm/amd/include/amd_shared.h
+++ b/drivers/gpu/drm/amd/include/amd_shared.h
@@ -23,6 +23,17 @@
 #ifndef __AMD_SHARED_H__
 #define __AMD_SHARED_H__
 
+#define AMD_MAX_USEC_TIMEOUT		100000  /* 100 ms */
+
+/*
+* Supported GPU families (aligned with amdgpu_drm.h)
+*/
+#define AMD_FAMILY_UNKNOWN              0
+#define AMD_FAMILY_CI                   120 /* Bonaire, Hawaii */
+#define AMD_FAMILY_KV                   125 /* Kaveri, Kabini, Mullins */
+#define AMD_FAMILY_VI                   130 /* Iceland, Tonga */
+#define AMD_FAMILY_CZ                   135 /* Carrizo */
+
 enum amd_ip_block_type {
 	AMD_IP_BLOCK_TYPE_COMMON,
 	AMD_IP_BLOCK_TYPE_GMC,