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V4L/DVB (4202): allow selecting CX2341x port mode

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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>
This commit is contained in:
Hans Verkuil
2006-06-21 17:04:13 -03:00
committed by Mauro Carvalho Chehab
parent 54aa9a21ca
commit 45ad9f8b44
4 changed files with 17 additions and 2 deletions
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8
Documentation/video4linux/cx2341x/fw-encoder-api.txt
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@@ -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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