[pvrusb2] mythtv and wintv-hvr-1950 - analog/digital scanning

Tue Jan 6 20:47:24 CST 2009

Great... We're getting somewhere...

> lsmod | grep cx25840
cx25840                36656  0
v4l2_common            24576  7 tuner,cx25840,pvrusb2,cx8800,ivtv,cx2341x,bttv
videodev               49024  8
tuner,cx25840,pvrusb2,cx8800,cx88xx,ivtv,bttv,v4l2_common
i2c_core               31892  13
s5h1411,tda18271,tda8290,tuner,cx25840,pvrusb2,cx88xx,ivtv,bttv,i2c_algo_bit,v4l2_common,tveeprom,lirc_i2c

> cat /sys/pvrusb2/*/debuginfo
Driver state info:
driver: <ok> <init> <connected> <no decoder> <mode=analog>
pipeline: <idle> <configok>
worker: <decode:quiescent> <encode:virgin> <encode:waitok> <usb:stop>
<pathway:ok>
state: error
Hardware supported inputs: television, dtv, composite, s-video
Bytes streamed=0 URBs: queued=0 idle=0 ready=0 processed=0 failed=0
Attached I2C modules:
Hauppauge PVR150 @ 0x71 [v4l2_standard v4l2_audiomode v4l2_bcsh
v4l2_volume v4l2_freq v4l2_crop v4l2_size v4l2_log]
cx25840' @ 0x44 [v4l2_standard v4l2_audiomode v4l2_bcsh v4l2_volume
v4l2_freq v4l2_crop v4l2_size v4l2_log]
tuner' @ 0x42 (handler: pvrusb2-tuner) [v4l2_standard v4l2_audiomode
v4l2_bcsh v4l2_volume v4l2_freq v4l2_crop v4l2_size v4l2_log]

> dmesg

[ 5749.265605] pvrusb2: =================  START STATUS CARD #0
=================
[ 5749.270713] cx25840' 0-0044: Video signal:              not present
[ 5749.270726] cx25840' 0-0044: Detected format:           NTSC-M
[ 5749.270730] cx25840' 0-0044: Specified standard:        automatic detection
[ 5749.270736] cx25840' 0-0044: Specified video input:     Composite 7
[ 5749.270741] cx25840' 0-0044: Specified audioclock freq: 48000 Hz
[ 5749.278114] cx25840' 0-0044: Detected audio mode:       mono
[ 5749.278126] cx25840' 0-0044: Detected audio standard:   not defined
[ 5749.278131] cx25840' 0-0044: Audio muted:               no
[ 5749.278135] cx25840' 0-0044: Audio microcontroller:     stopped
[ 5749.278140] cx25840' 0-0044: Configured audio standard: automatic detection
[ 5749.278146] cx25840' 0-0044: Configured audio system:   BTSC
[ 5749.278150] cx25840' 0-0044: Specified audio input:     Tuner (In8)
[ 5749.278155] cx25840' 0-0044: Preferred audio mode:      stereo
[ 5749.291654] pvrusb2: cx2341x config:
[ 5749.291668] pvrusb2: Stream: MPEG-2 Program Stream
[ 5749.291674] pvrusb2: VBI Format: No VBI
[ 5749.291678] pvrusb2: Video:  720x480, 30 fps
[ 5749.291684] pvrusb2: Video:  MPEG-2, 4x3, Variable Bitrate,
6000000, Peak 8000000
[ 5749.291691] pvrusb2: Video:  GOP Size 15, 2 B-Frames, GOP Closure
[ 5749.291697] pvrusb2: Audio:  48 kHz, MPEG-1/2 Layer II, 224 kbps,
Stereo, No Emphasis, No CRC
[ 5749.291705] pvrusb2: Spatial Filter:  Manual, Luma 1D Horizontal,
Chroma 1D Horizontal, 0
[ 5749.291710] pvrusb2: Temporal Filter: Manual, 8
[ 5749.291715] pvrusb2: Median Filter:   Off, Luma [0, 255], Chroma [0, 255]
[ 5749.291721] pvrusb2_a driver: <ok> <init> <connected> <no decoder>
<mode=analog>
[ 5749.291727] pvrusb2_a pipeline: <idle> <configok>
[ 5749.291732] pvrusb2_a worker: <decode:quiescent> <encode:virgin>
<encode:waitok> <usb:stop> <pathway:ok>
[ 5749.291737] pvrusb2_a state: error
[ 5749.291742] pvrusb2_a Hardware supported inputs: television, dtv,
composite, s-video
[ 5749.291749] pvrusb2_a Bytes streamed=0 URBs: queued=0 idle=0
ready=0 processed=0 failed=0
[ 5749.291754] pvrusb2: ==================  END STATUS CARD #0
==================

Mike, ami I missing "ghandler: pvrusb2-cx2584x-v4l"?

On Tue, Jan 6, 2009 at 9:19 PM, Mike Isely <isely at isely.net> wrote:
> On Tue, 6 Jan 2009, fivenote wrote:
>
>> OK... keeping things simple... :-)
>>
>> as root...
>>
>> * mythbackend off
>>
>> * plug in HVR-1950, creates /dev/video0
>>
>> * enum_val shows all inputs - no narrowing
>>
>> * set cur_val to composite and attache video player to hvr-1950
>>
>> * cat /dev/video0 > /tmp/foo
>>        stderr...
>>            cat: /dev/video0: Input/output error
>>        /tmp/foo...
>>            empty
>>        /var/log/syslog...
>>            Jan  6 21:00:39 vao1420 kernel: [ 3031.735288] pvrusb2:
>> WARNING: No decoder present
>
> Bingo.  Why I didn't ask you to look at the log before is beyond me :-(
> D'Oh.
>
> That warning is happening because the video digitizer / decoder
> chip-level driver has not attached itself to the pvrusb2 driver.  This
> is one of those other bits of v4l-dvb needed for the pvrusb2 driver to
> operate, and in this case that driver is apparently missing.  The driver
> is the cx25840 module, which handles the cx25843 chip in your device.
> This is the part that converts the incoming analog video signal into a
> frame buffer (which is then passed to the cx23417 chip for compression
> into an mpeg stream).  Without control of that chip, the video pipeline
> can't run.  The driver is detecting this, spitting out the message and
> killing the stream.  I don't think anyone's hit that behavior before,
> which is why I didn't expect it.  But the system log tells all.
>
> But wait - in your other reply you posted a large log snippet and the
> cx25840 messages were all there.  If you do an "lsmod" do you see the
> name cx25840 in the resulting list?  Another thing you can try: In the
> sysfs interface there's a node called "debuginfo".  If you read that
> (i.e. 'cat /sys/pvrusb2/*/debuginfo') you'll get a dump of the list of
> attached chip-level drivers.  Within that list you should hopefully see
> something like this:
>
>  handler: pvrusb2-cx2584x-v4l
>
> Do you see that?  Also, when you cat out debuginfo, this implicitly
> triggers a request to all those drivers to dump their states into the
> system log.  So if you follow that cat command with a dmesg you should
> see information reported directly by each driver.
>
> I wonder if cx25840 might be failing due to missing firmware?...
>
>  -Mike
>
>
> --
>
> Mike Isely
> isely @ pobox (dot) com
> PGP: 03 54 43 4D 75 E5 CC 92 71 16 01 E2 B5 F5 C1 E8
> _______________________________________________
> pvrusb2 mailing list
> pvrusb2 at isely.net
> http://www.isely.net/cgi-bin/mailman/listinfo/pvrusb2
>

-- 
~~~~~~~~~~~~~~~~~~~~
VAO - fivenote at gmail.com
~~~~~~~~~~~~~~~~~~~~