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Old 02-03-2006, 12:01 PM   #1
mad_ady
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BT878: outputs tv audio instead of FM Radio


Hello everybody.

I've recently purchased a Jetway PVR TvTuner, based on BT878. Tv works fine, but when I try to listen to FM Radio, I get the sound of the last tv channel or static if I hadn't switched to a tv channel before.

Here's my setup:

lspci:
Code:
0000:00:0b.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)
0000:00:0b.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)
lsmod:
Code:
...
tuner                  40104  0
tda9887                14224  0
bttv                  165584  1
video_buf              22916  1 bttv
btcx_risc               5128  1 bttv
tveeprom               13712  1 bttv
bttv is loaded with the following parameters:
Code:
card=78 tuner=38 radio=1 pll=1
dmesg says:
Code:
bttv: driver version 0.9.16 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture
bttv: Bt8xx card found (0).
ACPI: PCI Interrupt 0000:00:0b.0[A] -> GSI 16 (level, low) -> IRQ 177
bttv0: Bt878 (rev 17) at 0000:00:0b.0, irq: 177, latency: 64, mmio: 0xebe00000
bttv0: using: Jetway TV/Capture JW-TV878-FBK, Kworld KW-TV878RF [card=78,insmod option]
bttv0: gpio: en=00000000, out=00000000 in=007fffff [init]
tuner 1-0060: chip found @ 0xc0 (bt878 #0 [sw])
tuner 1-0060: TEA5767 detected.
tuner 1-0060: type set to 62 (Philips TEA5767HN FM Radio)
tuner 1-0061: chip found @ 0xc2 (bt878 #0 [sw])
bttv0: using tuner=38
tuner 1-0060: type set to 38 (Philips PAL/SECAM multi (FM1216ME MK3))
tuner 1-0061: type set to 38 (Philips PAL/SECAM multi (FM1216ME MK3))
bttv0: i2c: checking for TDA9875 @ 0xb0... not found
bttv0: i2c: checking for TDA7432 @ 0x8a... not found
bttv0: i2c: checking for TDA9887 @ 0x86... not found
bttv0: registered device video0
bttv0: registered device vbi0
bttv0: registered device radio0
bttv0: PLL: 28636363 => 35468950 . ok
I see that it registers the radio device, also finds a tuner for it (not sure if it's the correct one), but when I try to listen to it, I get the sound from the last tv channel, nomatter where I scan in the band.

I hope you have a suggestion.
 
Old 02-04-2006, 05:26 PM   #2
halvy
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- is the tuner capable of radio (not all bt878 are, i think).

- is the newest/best driver installed-- correctly.
 
Old 02-05-2006, 05:58 AM   #3
mad_ady
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yes, the tuner has fm radio support (works in windows)

as for the driver, my only concern is that I haven't used the correct tuner type; this was a tuner type that worked for tv; I assumed that it would work for fm too.

I'll try different tuner types and let you know if I find the correct one.
 
Old 02-05-2006, 08:18 AM   #4
mad_ady
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Ok. I've been doing some digging and this is what I know now.

I've tryed starting bttv with card=0 and with these following tuner types:

tuner=3 - Philips (SECAM+PAL_BG) (FI1216MF, FM1216MF, FR1216MF)
tuner=56 - Philips PAL/SECAM multi (FQ1216AME MK4)
tuner=44 - Philips 4 in 1 (ATI TV Wonder Pro/Conexant)
tuner=51 - Philips PAL/SECAM_D (FM 1256 I-H3)

and I get a tv picture and it finds some channels (not all), but I don't get any sound with the tv nor with radio. (For all experiments I made sure that the sound levels were'n muted)

Next I tried setting card=78 (KWorld/Jetway) and I tried the following tuners:

tuner=38 - Philips PAL/SECAM multi (FM1216ME MK3) [good video, no radio]
tuner=3 - Philips (SECAM+PAL_BG) (FI1216MF, FM1216MF, FR1216MF) [incomplete tv range]
tuner=56 - Philips PAL/SECAM multi (FQ1216AME MK4) [same as 38]
tuner=44 - Philips 4 in 1 (ATI TV Wonder Pro/Conexant) [incomplete tv range]
tuner=51 - Philips PAL/SECAM_D (FM 1256 I-H3) [same as 38]
tuner=57 - Philips FQ1236A MK4 [incomplete tv range]
tuner=63 - Philips FMD1216ME MK3 Hybrid Tuner [same as 38]
tuner=61 - Tena TNF9533-D/IF/TNF9533-B/DF [same as 38]

I searched http://www.bttv-gallery.de/ and I found a card that resambles a lot to what I have. That card is Conceptronic CTVFMi Version 2.0 (chips and PCM markings and layout match), so I tried with card=137 (Conceptronic) and tuner 38, but I got no sound on tv and radio.

Probably there are numerous combinations of the above parameters that might make the tuner work (somehow). The problem is I can't try all of them.

Do you have any suggestion to make it work?
Currently, with card=78 and tuner=38 I get video +audio, but no radio (I get the audio from the last tv channel).

Please help!

Thanks!
 
Old 02-05-2006, 12:48 PM   #5
halvy
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if its not a driver issue, then try the radio with other 'radio' tuner software.. maybe thats where the bottle nec is.
 
  


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