diff --git a/drivers/gpu/nvgpu/include/nvgpu/defaults.h b/drivers/gpu/nvgpu/include/nvgpu/defaults.h
index 0babea7bd..09ef75c60 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/defaults.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/defaults.h
@@ -23,13 +23,35 @@
 #ifndef NVGPU_DEFAULTS_H
 #define NVGPU_DEFAULTS_H
 
-/*
- * Default timeout used for channel watchdog and ctxsw timeout.
+/**
+ * @defgroup NVGPU_COMMON_DEFAULTS
+ *
+ * Default values used in NvGPU for timeouts, inits, etc.
+ */
+
+/**
+ * @ingroup NVGPU_COMMON_DEFAULTS
+ *
+ * The default timeout value defined in msec and used on a silicon
+ * platform. This timeout value is used for channel watchdog, ctxsw timeouts, gr
+ * timeouts, etc.
  */
 #define NVGPU_DEFAULT_POLL_TIMEOUT_MS	3000
 
+/**
+ * @ingroup NVGPU_COMMON_DEFAULTS
+ *
+ * The default timeout value defined in msec and used for railgate delay. This
+ * defines a value for auto-suspend delay.
+ */
 #define NVGPU_DEFAULT_RAILGATE_IDLE_TIMEOUT 500
 
+/**
+ * @ingroup NVGPU_COMMON_DEFAULTS
+ *
+ * The default timeout value defined in msec and used on FPGA platform. This
+ * timeout value is used at places similar to NVGPU_DEFAULT_POLL_TIMEOUT_MS.
+ */
 #define NVGPU_DEFAULT_FPGA_TIMEOUT_MS 100000U /* 100 sec */
 
 #endif /* NVGPU_DEFAULTS_H */