[linux-dvb] Problem with two budget-ci dvb-t cards

Oliver Endriss o.endriss at gmx.de
Thu Feb 1 19:28:08 CET 2007


Teemu Suikki wrote:
> Hi,
> 
> I posted this to the vdr list originally, but since it's obviously a
> kernel level problem I'm asking here too. :)
> 
> I have two budget cards. Both are handled with budget-ci driver, although
> only one of them actually has the physical CI connector..
> 
> Cards are quite similar. Older card has saa7146 and tda10045, and newer
> card has saa7146 and tda10046.. So slightly different frontend chips.
> 
> Either card works fine if plugged in alone, but if both are plugged in,
> only the tda10046 card works. I have tried them in every slot in all
> possible combinations, and it's always the same.
> 
> I tried to tune channels with "tzap". Both cards "work" fine, but only
> tda10046 card ever reports FE_HAS_LOCK.. Tda10045 card never shows
> FE_HAS_LOCK and reports very high ber numbers. Just like if the antenna
> was unplugged, but it isn't. :)
> 
> Is it possible that there is some bug that prevents using tda10045 and
> tda10046 in the same system? They both use the same tda1004x module after
> all.. Anyone with such system?

After a look at budget-ci.c I found a bug:
It's a bad idea to modify a static variable which is used by several
frontends... ;-)

> Here's dmesg output when initializing the cards. Looks fine, right?
> 
> saa7146: register extension 'budget_ci dvb'.
> PCI: Found IRQ 11 for device 0000:02:05.0
> PCI: Sharing IRQ 11 with 0000:00:0d.0
> saa7146: found saa7146 @ mem e0974c00 (revision 1, irq 11)
> (0x13c2,0x1012).
> saa7146 (0): dma buffer size 192512
> DVB: registering new adapter (TT-Budget-T-CI PCI).
> adapter has MAC addr = 00:d0:5c:04:43:33
> input: Budget-CI dvb ir receiver saa7146 (0) as /class/input/input1
> budget_ci: CI interface initialised
> DVB: registering frontend 0 (Philips TDA10046H DVB-T)...
> dvb_ca adapter 0: DVB CAM detected and initialised successfully
> 
> PCI: Found IRQ 3 for device 0000:02:08.0
> saa7146: found saa7146 @ mem e0976800 (revision 1, irq 3) (0x13c2,0x1011).
> saa7146 (1): dma buffer size 192512
> DVB: registering new adapter (TT-Budget/WinTV-NOVA-T     PCI).
> adapter has MAC addr = 00:d0:5c:22:27:8a
> input: Budget-CI dvb ir receiver saa7146 (1) as /class/input/input2
> DVB: registering frontend 1 (Philips TDA10045H DVB-T)...

Does the attached patch fix the problem?

Oliver

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