On Sun, 2010-04-11 at 00:56 -0400, Andy Walls wrote: > On Sat, 2010-04-10 at 23:21 -0400, Mark Lord wrote: > > On 10/04/10 06:54 PM, Andy Walls wrote: > > > > > > Hmmm. Darren's having problems (loss of video/black screen) with my > > > patches under my cx18-audio repo, but I'm not quite convinced he doesn't > > > have some other PCI bus problem either. > > > > > > Anyway, my plan now is this: > > > > > > 1. on cx18-av-core.c:input_change() > > > a. set register 0x808 for audio autodetection > > > b. restart the format detection loop > > > c. set or reset a 1.5 second timeout > > > > > > 2. after the timer expires, if no audio standard was detected, > > > a. force the audio standard by programming register 0x808 > > > (e.g. BTSC for NTSC-M) > > > b. restart the format detection loop so the micrcontroller will > > > do the unmute when it detects audio > > > > > > Darren is in NTSC-M/BTSC land. What TV standard are you dealing with? > > .. > > > > I'm in Canada, using the tuner for over-the-air NTSC broadcasts. > > > Try this: > > http://linuxtv.org/hg/~awalls/cx18-audio2 > > this waits 1.5 seconds after an input/channel change to see if the audio > standard micrcontroller can detect the standard. If it can't, the > driver tells it to try a fallback detection. Right now, only the NTSC-M > fallback detection is set to force a mode (i.e. BTSC), all the others > "fall back" to their same auto-detection. > > Some annoyances with the fallback to a forced audio standard, mode, and > format: > > 1. Static gets unmuted on stations with no signal. :( > > 2. I can't seem to force mode "MONO2 (LANGUAGE B)". I'm guessing the > microcontroller keeps setting it back down to "MONO1 (LANGUAGE A/Mono L > +R channel for BTSC, EIAJ, A2)" Feel free to experiment with the LSB of ^^^ Bah, wrong byte. That should have been the LSN of the MSB of the 0x1101 number. I'm too tired. Regards, Andy > the fallback setting magic number (0x1101) in > cx18-av-core.c:input_change(). > > > Regards, > Andy > > > _______________________________________________ > ivtv-devel mailing list > ivtv-devel@xxxxxxxxxxxxxx > http://ivtvdriver.org/mailman/listinfo/ivtv-devel -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
