1 files changed, 3 insertions, 1 deletions

diff --git a/Documentation/video4linux/cx2341x/fw-encoder-api.txt b/Documentation/video4linux/cx2341x/fw-encoder-api.txt
index 5dd3109a8b3f..5a27af2ee1c6 100644
--- a/Documentation/video4linux/cx2341x/fw-encoder-api.txt
+++ b/Documentation/video4linux/cx2341x/fw-encoder-api.txt
@@ -407,8 +407,10 @@ Description
                 u32 length;             // Length of this frame
                 u32 offset_low;         // Offset in the file of the
                 u32 offset_high;        // start of this frame
-                u32 mask1;              // Bits 0-1 are the type mask:
+                u32 mask1;              // Bits 0-2 are the type mask:
                                         // 1=I, 2=P, 4=B
+                                        // 0=End of Program Index, other fields
+                                        //   are invalid.
                 u32 pts;                // The PTS of the frame
                 u32 mask2;              // Bit 0 is bit 32 of the pts.
         };