2015-08-05 17:22:42 +02:00
|
|
|
NOTE: This is an unsupported hack so that legacy software works
|
|
|
|
with the hardware!
|
|
|
|
To properly pass data through a CI CAM you should read
|
|
|
|
the TS from a dvr device and write it to a ci device
|
|
|
|
in user space!
|
|
|
|
|
|
|
|
Redirection of TS streams through CI modules is now supported
|
|
|
|
through /sys/class/ddbridge/ddbridge0/redirect.
|
|
|
|
It only works with cards based on the ddbridge PCIe bridge, not
|
|
|
|
with nGene based cards.
|
|
|
|
|
|
|
|
It is set up in such a way that you can write "AB CD" to
|
|
|
|
a "redirect" attribute and data from input B of card A is then piped through
|
|
|
|
port D (meaning TAB (D+1) which uses output D and input 2*D for CI io)
|
|
|
|
of card C and then shows up in the demux device belonging to
|
|
|
|
input B (input (B&1) of TAB (B/2+1)) of card A.
|
|
|
|
|
|
|
|
E.g.:
|
|
|
|
|
|
|
|
echo "00 01" > /sys/class/ddbridge/ddbridge0/redirect
|
|
|
|
|
|
|
|
will pipe input 0 of card 0 through CI at port 1 (TAB 2) of card 0.
|
|
|
|
|
|
|
|
Redirection should only be done right after loading the driver
|
|
|
|
(or booting if the driver is built-in) and before using the
|
|
|
|
devices in any way.
|
|
|
|
|
|
|
|
adapter_alloc=3 is rcommended when using redirect
|
|
|
|
The ci device will then show up in the same adapter directory and most
|
|
|
|
software will then assume it belongs to the frontend in the same directory.
|
2022-01-14 12:54:03 +01:00
|
|
|
|
|
|
|
|
|
|
|
Redirect between cards in different IOMMU groups will not work!
|
|
|
|
Disable IOMMU if you have this problem.
|