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-rw-r--r--Documentation/video4linux/cx2341x/fw-encoder-api.txt8
1 files changed, 7 insertions, 1 deletions
diff --git a/Documentation/video4linux/cx2341x/fw-encoder-api.txt b/Documentation/video4linux/cx2341x/fw-encoder-api.txt
index f74b0ae4a76..001c68644b0 100644
--- a/Documentation/video4linux/cx2341x/fw-encoder-api.txt
+++ b/Documentation/video4linux/cx2341x/fw-encoder-api.txt
@@ -270,11 +270,17 @@ Param[0]
Name CX2341X_ENC_SET_OUTPUT_PORT
Enum 187/0xBB
Description
- Assign stream output port (not recommended you change setting from default)
+ Assign stream output port. Normally 0 when the data is copied through
+ the PCI bus (DMA), and 1 when the data is streamed to another chip
+ (pvrusb and cx88-blackbird).
Param[0]
0=Memory (default)
1=Streaming
2=Serial
+Param[1]
+ Unknown, but leaving this to 0 seems to work best. Indications are that
+ this might have to do with USB support, although passing anything but 0
+ onl breaks things.
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