Date: Sat, 22 Mar 1997 20:02:37 -0500 From: Randall Hopper <rhh@ct.picker.com> To: Amancio Hasty <hasty@rah.star-gate.com> Cc: Steve Passe <smp@csn.net>, multimedia@freebsd.org Subject: CAP_SINGLE tsleep failure (was Re: bt848 video losing sync) Message-ID: <19970322200237.25382@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.
Ok. Will do.
BTW, hadn't checked the console in a while. I notice that I'm getting a
single tsleep error from the CAP_SINGLE ioctl code each time I freeze the
video. Here's all values represented in the console buffer now:
bktr0: ioctl: tsleep error -1 2c0f24
bktr0: ioctl: tsleep error -1 1000f24
bktr0: ioctl: tsleep error -1 1000754
bktr0: ioctl: tsleep error -1 2c0754
bktr0: ioctl: tsleep error -1 1000624
bktr0: ioctl: tsleep error -1 2c0624
error=tsleep((caddr_t)bktr, METPRI, "capturing", hz);
Since this is an ERESTART error (METPRI has PCATCH), is the right fix for
this to change this line to:
while ((error=tsleep((caddr_t)bktr, METPRI, "capturing", hz)) == ERESTART) ;
Sounds like this may be related to my seeing the video not capture both
frames on a CAP_SINGLE.
Randall
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