diff --git a/va/va.h b/va/va.h
index 49979f1ed..72f605c5f 100644
--- a/va/va.h
+++ b/va/va.h
@@ -1036,6 +1036,14 @@ typedef enum {
      * The value returned uses the VAConfigAttribValEncPerBlockControl type.
      */
     VAConfigAttribEncPerBlockControl    = 55,
+    /**
+     * \brief VP9 encoding attribute. Read-only.
+     *
+     * This attribute exposes a number of capabilities of the underlying
+     * VP9 implementation. The attribute value is partitioned into fields as defined in the
+     * VAConfigAttribValEncVP9 union.
+     */
+    VAConfigAttribEncVP9                = 56,
     /**@}*/
     VAConfigAttribTypeMax
 } VAConfigAttribType;
diff --git a/va/va_enc_av1.h b/va/va_enc_av1.h
index e47836b63..82463d058 100644
--- a/va/va_enc_av1.h
+++ b/va/va_enc_av1.h
@@ -666,7 +666,8 @@ typedef struct  _VAEncPictureParameterBufferAV1 {
      *  0: 16x16 block size, default value;
      *  1: 32x32 block size;
      *  2: 64x64 block size;
-     *  3: 8x8 block size.
+     *  3: 8x8 block size;
+     *  4: 4x4 block size.
      */
     uint8_t     seg_id_block_size;
 
diff --git a/va/va_enc_vp9.h b/va/va_enc_vp9.h
index 107ab0c9c..d4c79a1bd 100644
--- a/va/va_enc_vp9.h
+++ b/va/va_enc_vp9.h
@@ -507,8 +507,19 @@ typedef struct  _VAEncPictureParameterBufferVP9 {
      */
     uint32_t    skip_frames_size;
 
+    /** \brief Block size for each Segment ID in Segment Map.
+     *  This specify the granularity of media driver of reading and processing the segment map.
+     *  0: 16x16 block size, default value;
+     *  1: 32x32 block size;
+     *  2: 64x64 block size;
+     *  3: 8x8 block size.
+     */
+    uint8_t     seg_id_block_size;
+
+    uint8_t     va_reserved8[3];
+
     /** \brief Reserved bytes for future use, must be zero */
-    uint32_t    va_reserved[VA_PADDING_MEDIUM];
+    uint32_t    va_reserved[7];
 } VAEncPictureParameterBufferVP9;
 
 
@@ -594,6 +605,30 @@ typedef struct _VAEncMiscParameterTypeVP9PerSegmantParam {
  */
 
 
+/** \brief Attribute value for VAConfigAttribEncVP9. */
+typedef union _VAConfigAttribValEncVP9 {
+    struct {
+        /**
+         * \brief Min segmentId block size accepted.
+         * This is the granularity of segmentation map.
+         */
+        uint32_t min_segid_block_size_accepted : 8;
+
+        /**
+         * \brief Type of segment feature supported.
+         * (segment_feature_support & 0x01) == 1: SEG_LVL_ALT_Q is supported, 0: not.
+         * (segment_feature_support & 0x02) == 1: SEG_LVL_ALT_L is supported, 0: not.
+         * (segment_feature_support & 0x04) == 1: SEG_LVL_REF_FRAME is supported, 0: not.
+         * (segment_feature_support & 0x08) == 1: SEG_LVL_SKIP is supported, 0: not.
+         */
+        uint32_t segment_feature_support       : 4;
+
+        /** \brief Reserved bits for future, must be zero. */
+        uint32_t reserved                      : 20;
+    } bits;
+    uint32_t value;
+} VAConfigAttribValEncVP9;
+
 /**@}*/
 
 #ifdef __cplusplus