On Sat, 2010-04-17 at 08:09 -0400, Mark Lord wrote:
> On 17/04/10 12:43 AM, Andy Walls wrote:
> > I had to disassemble and study some of the microcontorller firmware, and
> > then reread some documents, to figure out how all the audio detection
> > "resets" must work.
> >
> > I've just pushed some microcontroller reset related changes to the
> > cx18-audio2 repo. Please test and see if things are better or worse.
> ..
>
> Mmm.. something is not right -- the audio is failing constantly with that change.
Crud. I added an additional soft reset using register 0x810 with that
change; maybe that needs to be taken out.
> Perhaps if I could dump out the registers, we might see what is wrong.
> I also tried:
> v4l2-dbg -d /dev/video1 -c type=host,chip=1 --list-registers=min=0x800,max=0x9ff
> but that fails to read any of the registers (ioctl: VIDIOC_DBG_G_REGISTER failed for 0xXXX).
>
> I think I'll patch the driver to dump them for us.
Whatever's easiest. As root, this should work:
# v4l2-dbg -d /dev/video0 -c host1 --list-registers=min=0x800,max=0x9ff
ioctl: VIDIOC_DBG_G_REGISTER
00 04 08 0C 10 14 18 1C
00000800: 13248000 0000fefe 01010411 20000000 80ff0200 20140905 000031c0 478005d1
00000820: 80002800 e084e044 007e54a8 240107f2 0186a020 00000000 24010800 0186a020
00000840: 00000000 00801c00 00000020 00000000 00a14f72 00000030 00000000 00007800
[...]
000009c0: 80007ffc 00000000 0000c000 00000001 02000200 00000000 00000000 00000000
000009e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Or equivalently with the actual register addresses (vs. the logical remapping using host1):
# v4l2-dbg -d /dev/video0 --list-registers=min=0x2c40800,max=0x2c409ff
ioctl: VIDIOC_DBG_G_REGISTER
00 04 08 0C 10 14 18 1C
02c40800: 137d8000 0000fefe 01010411 20000000 80ff0200 20140905 000031c0 478005d1
02c40820: 80002800 e084e044 007e54a8 240107f2 0186a020 00000000 24010800 0186a020
02c40840: 00000000 00801c00 00000020 00000000 00a14f72 00000030 00000000 00007800
[...]
02c409c0: 7ffc27cc 00000000 0000c000 00000001 02000200 00000000 00000000 00000000
02c409e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Dumps of registers might help me figure out something.
> Thank-you for your work on this. There are many of us here hoping
> that we can figure out and fix whatever is wrong with our cards.
No problem. Sorry for all the shots in the dark so far. Without a
BTSC/MTS signal source I'm just trying to guess what might be wrong.
(Most VCR's, set top boxes, and RF modulators only seem to put out the
monaural L+R sound signal and not an MTS BTSC signal with the pilot tone
and stereo L-R as well).
Regards,
Andy
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