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Date:      Sat, 22 Mar 1997 22:59:09 -0500
From:      Randall Hopper <rhh@ct.picker.com>
To:        Amancio Hasty <hasty@rah.star-gate.com>, Steve Passe <smp@csn.net>
Cc:        multimedia@freebsd.org
Subject:   Re: bt848 video losing sync
Message-ID:  <19970322225909.56727@ct.picker.com>
In-Reply-To: <199703230029.QAA00429@rah.star-gate.com>; from Amancio Hasty on Sat, Mar 22, 1997 at 04:29:18PM -0800
References:  <19970322191331.35902@ct.picker.com> <199703230029.QAA00429@rah.star-gate.com>

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Amancio Hasty:
 |From The Desk Of Randall Hopper :
 |> I don't know if anyone else sees this, but when starting and stopping the
 |> video on the tuner, every so often (very rarely) it'll sputter, lose
 |> vertical sync, slip down to 2 or 3 frames a second for a second or two, and
 |> then just freeze with the VBI band right in the middle of the window.
 |
 |Write an ioctl or somehow trigger in the driver printing the status
 |registers in bktr_intr. That will give us a clue as to what is going on.

Uncommenting the existing RISC_COUNT and INT_STATUS print, I was lucky and
it happened almost immediately after starting fxtv the first time after
booting the debug kernel (compressed output attached).

    > cut -c41-45 messages | sort | uniq -c
     233 0206
     353 020e 
     111 0a04 
      44 0a0c 
       1 1206 
       1 3206 
       2 3286
      98 3a04
      15 3a06
       4 3a0c 
       1 420e 

Your and Steve's eye will doubtless glean more than mine, but the events
that look "unique" to my untrained eye are the:

     18:52:36 stealth /kernel: bktr0: ioctl: tsleep error 35 100052c

error in the middle, the single FIFO Data Stream Resync in the INT_STAT
values (xxxx420e above), and the Luma/Chroma ADC overflows (xxxxxxx8) that
don't set in until a good way down the output, and then stick in there for
the rest of it.

Thanks,

Randall

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end



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