[linux-dvb] Re: mt352 readreg error avermedia 771

Richard Holgate rlholgate.lists at googlemail.com
Sat Feb 4 21:12:09 CET 2006


Hi

Just found this thread on the linuxtv-dvb list - think I am seeing a similar
issue. Wondering if any of you guys got anywhere with it?

My situation: Avermedia 771 works reliably with kernel
2.6.12-gentoo-r6(also with
2.6.10, 2.6.11), has been working for about a year now. But fails to detect
and load correctly with newer kernel 2.6.15-gentoo-r1. The two kernels have
identical configs.

Perhaps I can offer to be a test case here? The only thing I change is the
booted kernel. No need to swap hardware around or change machines, and it
the problem seems quite reproducible. If any driver maintainers are reading
and interested in getting in touch, please do.

Card does work reliably with: uname -a
Linux tsunami 2.6.12-gentoo-r6-b #2 Sat Feb 4 14:02:57 GMT 2006 i686 AMD
Athlon(TM) XP 2200+ AuthenticAMD GNU/Linux

Messages from a successful detection of the card using kernel
2.6.12-gentoo-r6:

bttv: driver version 0.9.15 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture
bttv: Bt8xx card found (0).
PCI: Enabling device 0000:00:13.0 (0004 -> 0006)
PCI: IRQ 0 for device 0000:00:13.0 doesn't match PIRQ mask - try
pci=usepirqmask
PCI: setting IRQ 9 as level-triggered
PCI: Assigned IRQ 9 for device 0000:00:13.0
PCI: Sharing IRQ 9 with 0000:00:13.1
bttv0: Bt878 (rev 17) at 0000:00:13.0, irq: 9, latency: 32, mmio: 0xdd000000
bttv0: detected: AVermedia AverTV DVB-T 771 [card=123], PCI subsystem ID is
1461:0771
bttv0: using: AVerMedia AVerTV DVB-T 771 [card=123,autodetected]
bttv0: gpio: en=00000000, out=00000000 in=0094008f [init]
bttv0: using tuner=4
bttv0: registered device video0
bttv0: registered device vbi0
bttv0: PLL: 28636363 => 35468950 .. ok
bttv0: add subdevice "remote0"
bttv0: add subdevice "dvb0"
bt878: AUDIO driver version 0.0.0 loaded
bt878: Bt878 AUDIO function found (0).
PCI: Enabling device 0000:00:13.1 (0004 -> 0006)
PCI: Found IRQ 9 for device 0000:00:13.1
PCI: Sharing IRQ 9 with 0000:00:13.0
bt878(0): Bt878 (rev 17) at 00:13.1, irq: 9, latency: 32, memory: 0xdc800000
DVB: registering new adapter (bttv0).
DVB: registering frontend 0 (Zarlink MT352 DVB-T)...
ir-kbd-gpio: bttv IR (card=123) detected at pci-0000:00:13.0/ir0


Card does not work with: uname -a
Linux tsunami 2.6.15-gentoo-r1-b #3 PREEMPT Sat Feb 4 12:40:22 GMT 2006 i686
AMD Athlon(TM) XP 2200+ AuthenticAMD GNU/Linux

Messages from a failed detection of the card with 2.6.15 kernel below. All
software, hardware, etc. are the same - literally just reboot into the newer
kernel.

bttv: driver version 0.9.16 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture
bttv: Bt8xx card found (0).
PCI: Enabling device 0000:00:13.0 (0004 -> 0006)
PCI: IRQ 0 for device 0000:00:13.0 doesn't match PIRQ mask - try
pci=usepirqmask
PCI: setting IRQ 9 as level-triggered
PCI: Assigned IRQ 9 for device 0000:00:13.0
PCI: Sharing IRQ 9 with 0000:00:13.1
bttv0: Bt878 (rev 17) at 0000:00:13.0, irq: 9, latency: 32, mmio: 0xdd000000
bttv0: detected: AVermedia AverTV DVB-T 771 [card=123], PCI subsystem ID is
1461:0771
bttv0: using: AVerMedia AVerTV DVB-T 771 [card=123,autodetected]
bttv0: gpio: en=00000000, out=00000000 in=00d4cc8f [init]
bttv0: using tuner=4
bttv0: registered device video0
bttv0: registered device vbi0
bttv0: PLL: 28636363 => 35468950 .. ok
bttv0: add subdevice "remote0"
bttv0: add subdevice "dvb0"
bt878: AUDIO driver version 0.0.0 loaded
bt878: Bt878 AUDIO function found (0).
PCI: Enabling device 0000:00:13.1 (0004 -> 0006)
PCI: Found IRQ 9 for device 0000:00:13.1
PCI: Sharing IRQ 9 with 0000:00:13.0
bt878(0): Bt878 (rev 17) at 00:13.1, irq: 9, latency: 32, memory: 0xdc800000
DVB: registering new adapter (bttv0).
mt352_read_register: readreg error (reg=127, ret==-5)
dvb-bt8xx: A frontend driver was not found for device 109e/0878 subsystem
1461/0771
input: bttv IR (card=123) as /class/input/input2


For me its an annoyance more than a problem, I don't actually need to
upgrade to 2.6.15 yet, so staying with 2.6.12 for the moment.

Richard
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