2011/9/24 Jin Kazama jin...@skynet.fr:
On 9/24/11 12:06 AM, Antti Palosaari wrote:
On 09/24/2011 12:06 AM, Jin Kazama wrote:
Hello,
I've been testing af9015/tda18218 based usb DVB-T tuners on a 2.6.39.4
kernel with the latest v4l drivers avaiable (from git).
When I'm using a single USB module, (listed as /dev/dvb/adapter0),
everything works fine.
When I'm plugging another module, at first it looks like everything's ok
(/dev/dvb/adapter1) and if I try to use this module while the adapter0
is not been used, it works - but if try to use both modules at the same
time, I get garbage output on both cards (error: warning: discontinuity
for PID... with dvblast on both cards.
Does anyone have any idea on how to fix this problem?
Feel free to fix it. I am too busy currently.
Well, it looks like if I put 2 devices on different USB buses (on the same
machine), they work fine, but if they're on the same USB bus, I get the
problem...
I think the driver may get raw data from the USB bus - and the way it
identifies the device is not the proper way (I have 2 exactly identical
devices) = when both devices send data, the driver catches all the data
from the bus, which is a corrupt mix of both streams...)
Unfortunately, I don't think that I'm capable of fixing the problem by
myself, I don't even know which part of the driver to look for... if someone
can give me a hint, I might *try* to *attempt* to fix it :)...
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Hello, I have similar problem, I have a dual tuner and they don't work together:
# i2cdetect -l
i2c-0 smbus SMBus nForce2 adapter at 4d00 SMBus adapter
i2c-1 i2c cx23885[0] I2C adapter
i2c-2 i2c cx23885[0] I2C adapter
i2c-3 i2c cx23885[0] I2C adapter
i2c-4 i2c NVIDIA i2c adapter 0 at 3:00.0 I2C adapter
i2c-5 i2c NVIDIA i2c adapter 2 at 3:00.0 I2C adapter
i2c-6 i2c NVIDIA i2c adapter 3 at 3:00.0 I2C adapter
i2c-7 i2c KWorld PlusTV Dual DVB-T Stick (DVB-T 399U) I2C
adapter
i2c-8 i2c KWorld PlusTV Dual DVB-T Stick (DVB-T 399U) I2C
adapter
I can not change the USB bus, because they are on the same physical
device.I have no idea how to fix it but I am ready to test all fixes.
I read some Antti posts on how to is designed the af9015 dual demod:
http://www.mail-archive.com/linux-media@vger.kernel.org/msg36821.html
http://palosaari.fi/linux/v4l-dvb/controlling_tuner_af9015_dual_demod.txt
Is there any tool to check the i2c errors?
Thanks for all your work and best regards.
--
Josu Lazkano
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