diff --git a/src/gallium/include/pipe/p_video_enums.h b/src/gallium/include/pipe/p_video_enums.h
index 9823c518de4..bff95af6b76 100644
--- a/src/gallium/include/pipe/p_video_enums.h
+++ b/src/gallium/include/pipe/p_video_enums.h
@@ -285,6 +285,18 @@ enum pipe_video_enc_intra_refresh_mode
    PIPE_VIDEO_ENC_INTRA_REFRESH_MULTI_REF = 0x40000,
 };
 
+enum pipe_video_slice_mode
+{
+   /*
+    * Partitions the frame using block offsets and block numbers
+   */
+   PIPE_VIDEO_SLICE_MODE_BLOCKS = 0,
+   /*
+    * Partitions the frame using max slice size per coded slice
+   */
+   PIPE_VIDEO_SLICE_MODE_MAX_SLICE_SICE = 1,
+};
+
 enum pipe_video_entrypoint
 {
    PIPE_VIDEO_ENTRYPOINT_UNKNOWN,
diff --git a/src/gallium/include/pipe/p_video_state.h b/src/gallium/include/pipe/p_video_state.h
index 07831850455..1acf9fd20e8 100644
--- a/src/gallium/include/pipe/p_video_state.h
+++ b/src/gallium/include/pipe/p_video_state.h
@@ -627,9 +627,15 @@ struct pipe_h264_enc_picture_desc
    bool enable_vui;
    struct hash_table *frame_idx;
 
+   enum pipe_video_slice_mode slice_mode;
+
+   /* Use with PIPE_VIDEO_SLICE_MODE_BLOCKS */
    unsigned num_slice_descriptors;
    struct h264_slice_descriptor slices_descriptors[128];
 
+   /* Use with PIPE_VIDEO_SLICE_MODE_MAX_SLICE_SICE */
+   unsigned max_slice_bytes;
+
    bool insert_aud_nalu;
    enum pipe_video_feedback_metadata_type requested_metadata;
 };
@@ -814,8 +820,14 @@ struct pipe_h265_enc_picture_desc
    bool not_referenced;
    struct hash_table *frame_idx;
 
+   enum pipe_video_slice_mode slice_mode;
+
+   /* Use with PIPE_VIDEO_SLICE_MODE_BLOCKS */
    unsigned num_slice_descriptors;
    struct h265_slice_descriptor slices_descriptors[128];
+
+   /* Use with PIPE_VIDEO_SLICE_MODE_MAX_SLICE_SICE */
+   unsigned max_slice_bytes;
    enum pipe_video_feedback_metadata_type requested_metadata;
 };