kern/113785: [firewire] dropouts when playing DV on firewire

[Dieter BSD]

New info:

I needed to return the NEC firewire controller to the machine it
was borrowed from. Bought a new card with NEC chip to replace it.

Differences:

Old:
<NEC uPD72871/2> mem 0xfdeff000-0xfdefffff irq 10 at device 8.0 on pci2
OHCI version 1.0 (ROM=1)
Phy 1394a available S400, 2 ports.
Link S400, max_rec 1024 bytes.

New:
<NEC uPD72874> mem 0xfdffd000-0xfdffdfff irq 19 at device 8.0 on pci1
OHCI version 1.10 (ROM=1)
Phy 1394a available S400, 3 ports.
Link S400, max_rec 2048 bytes.

Additional difference is that old card is combo firewire and usb,
new card is just firewire.

With the old card, I had to get it into non CYCLEMASTER mode,
but with the new card it works fine in CYCLEMASTER mode.
So it appears that CYCLEMASTER mode vs non CYCLEMASTER mode
isn't the problem.

without camcorder:

fwcontrol -u 1 -t
crc_len: 6 generation:45 node_count:4 sid_count:4
id link gap_cnt speed delay cIRM power port0 port1 port2 ini more
00    0      10  S400     0    0W     P     -         1    0
01    1      10  S400     0    0W     P     C         0    0
02    0      10  S400     0    0W     P     -     C   1    0
03    1      10  S400     1   -1W     -     C     -   0    0

(The other three lines must be the three repeaters.)

power up camcorder:

fwohci1: fwohci_intr_core: node_id=0x00000004, SelfID Count=46, CYCLEMASTER mode
firewire1: 5 nodes, maxhop <= 4 cable IRM irm(4)  (me)
firewire1: bus manager 4

crc_len: 7 generation:46 node_count:5 sid_count:5
id link gap_cnt speed delay cIRM power port0 port1 port2 ini more
00    1      63  S100     1    0W     -     P         1    0
01    0       8  S400     0    0W     P     C         0    0
02    1       8  S400     0    0W     P     C         0    0
03    0       8  S400     0    0W     P     -     C   0    0
04    1       8  S400     1   -1W     -     C     -   0    0

Does this new info generate any new ideas about what the problem is,
and how to get the VIA controller working?
There are other cards that could go in that expansion slot.
They are still putting VIA controllers on new mainboards.