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authorHans Verkuil <hverkuil@xs4all.nl>2006-06-21 17:04:13 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2006-06-25 02:05:23 -0300
commit45ad9f8b44b06bf1e91b4b3c338406c2233f0482 (patch)
treeb2cccb49543bcb7289d084a803c44354fcb64115 /Documentation
parent54aa9a21ca03cf41d911ada969e86f27ce58bab9 (diff)
V4L/DVB (4202): allow selecting CX2341x port mode
CX2341X port was always set to 'memory', but 'streaming' is also possible ivtv uses the memory (DMA) interface with the CX2341X, while pvrusb2 and cx88-blackbird use the streaming interface. This setting is now selectable by the driver. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'Documentation')
-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 f74b0ae4a769..001c68644b08 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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