On Jun 28, 2011, at 6:30 AM, Andy Walls wrote: > Jarod Wilson <jarod@xxxxxxxxxxxx> wrote: > >> On Apr 10, 2011, at 7:08 PM, Andy Walls wrote: >> >>> On Sat, 2011-04-09 at 21:39 -0400, Jarod Wilson wrote: >>> >>>>> Jarod, >>>>> >>>>> The HVR-1850 uses a raw IR receiver in the CX23888 and older >>>> HVR-1250s use the raw IR receiver in the CX23885. They both work >> for >>>> Rx (I need to tweak the Cx23885 rx watermark though), but I never >>>> found time to finish Tx (lack of kernel interface when I had time). >>>>> >>>>> If you obtain one of these I can answer any driver questions. >>>> >>>> Quite some time back, I bought an HVR-1800 and an HVR-1250. I know >> one of >>>> them came with an mceusb transceiver and remote, as was pretty sure >> it was >>>> the 1800. For some reason, I didn't recall the 1250 coming with >> anything at >>>> all, but looking at dmesg output for it: >>>> >>>> cx23885 driver version 0.0.2 loaded >>>> cx23885 0000:03:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 >>>> CORE cx23885[0]: subsystem: 0070:7911, board: Hauppauge >> WinTV-HVR1250 [card=3,autodetected] >>>> tveeprom 0-0050: Hauppauge model 79001, rev E3D9, serial# 4904656 >>>> tveeprom 0-0050: MAC address is 00:0d:fe:4a:d6:d0 >>>> tveeprom 0-0050: tuner model is Microtune MT2131 (idx 139, type 4) >>>> tveeprom 0-0050: TV standards NTSC(M) ATSC/DVB Digital (eeprom 0x88) >>>> tveeprom 0-0050: audio processor is CX23885 (idx 39) >>>> tveeprom 0-0050: decoder processor is CX23885 (idx 33) >>>> tveeprom 0-0050: has no radio, has IR receiver, has no IR >> transmitter >>>> >>>> So it seems I do have hardware. However, its one of the two tuner >> cards in >>>> my "production" mythtv backend right now, making it a bit hard to do >> any >>>> experimenting with. If I can get it out of there, it looks like I >> just add >>>> an enable_885_ir=1, and I should be able to poke at it... >>> >>> Yeah. Igor's TeVii S470 CX23885 based card had interrupt storms when >>> enabled, so IR for '885 chips is disabled by default. To >> investigate, I >>> tried to by an HVR-1250 with a CX23885, but instead got an HVR-1275 >> with >>> a CX23888. dandel, on IRC, did a pretty decent job in testing >> HVR-1250 >>> operation and finding it works, despite climbing kernel >>> build/development learning curve at the time. >> ... >> >> Finally got some time to play with my 1250, dug out its rx cable, turns >> out to >> be the same one I special-ordered to work on the 1150 Devin sent me. >> Oops. >> Anyway. First impressions, not so good. Got a panic on boot, somewhere >> in >> cx23885_video_irq, iirc, when booting with enable_885_ir=1 set. >> However, dmesg >> was somewhere in the middle of cx18 init of the HVR-1600 in the box. >> Dunno if >> there's any way that's actually directly related, but I yanked the >> 1600. After >> doing that, the box managed to boot fine, but then while testing >> w/ir-keytable >> and an RC-6 remote, I got what I think was the same panic -- definitely >> the >> cx23885_video_irq bit in the trace, something about sleeping while >> atomic, IP >> at mwait_idle. (On the plus side, IR did seem to be working before >> that). >> >> Note also that this is a 2.6.32-based kernel with a 2.6.38-era backport >> of the >> driver code, because that's what was on this box. Was about to put it >> back into >> "production" use, but hey, its summer, there's nothing really for it to >> record >> for another few months, so I'll keep it out and throw it into another >> box with >> a newer kernel and serial console, etc., so I can further debug... > > In a very early version of the CX23885 IR changes I made the mistake of performing I2C transactions in an interrupt handler. That has been fixed in cx23885 for quite some time though. It also required some I2C fixes in cx25840-core.c IIRC, which again, has been fixed for some time. Up and running on 3.0-rc5 now, and I'm not seeing the panic, but the box keeps hard-locking after some number of keypresses. Can't get a peep out of it with sysrq, nmi watchdog doesn't seem to fire, etc. At the suggestion of "Dark Shadow", I've also tried booting the box with pci=nomsi. Works a treat then. Since his HVR-1270 and my HVR-1250 both behave much better with pci=nomsi, I'm thinking that in the short-term, we should probably make sure msi doesn't get enabled in the cx23885 driver, and longer-term, we can look at fixing it. -- Jarod Wilson jarod@xxxxxxxxxxxx -- 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
