[ivtv-users] CX18 question for users

[Andy Walls]

On Wed, 2008-09-03 at 10:59 +0100, Brian Hope wrote:
> Andy,
>     Basically my card works for SVideo and Composite inputs but I
> haven't got the digital tuner working yet. (I have a separate issue
> with sound via HDMI).
> 
> My output is below.


Brian,

With an 82845 and 82801G, I wouldn't expect you to have the problem with
the CX23418 responding poorly to the driver: the motherboard chipset
should be cleaning up the mess.

> Brian
> 
> lspci -vv -x
> -[0000:00]-+-00.0  Intel Corporation Mobile 945GM/PM/GMS, 943/940GML
> and 945GT Express Memory Controller Hub
[...]
>            +-1d.7  Intel Corporation 82801G (ICH7 Family) USB2 EHCI
> Controller
>            +-1e.0-[0000:03]--+-00.0  Conexant CX23418 Single-Chip
> MPEG-2 Encoder with Integrated Analog Video/Broadcast Audio Decoder
>            |                 +-01.0  Conexant CX23418 Single-Chip
> MPEG-2 Encoder with Integrated Analog Video/Broadcast Audio Decoder
>            |                 +-02.0  Broadcom Corporation BCM4318
> [AirForce One 54g] 802.11g Wireless LAN Controller
>            |                 \-04.0  Texas Instruments TSB43AB22/A
> IEEE-1394a-2000 Controller (PHY/Link)


> lspci -s 0:1e.0 -vv -x 
> 
> 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
> (prog-if 01 [Subtractive decode])
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
> Stepping- SERR- FastB2B-
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR-
> Latency: 0
> Bus: primary=00, secondary=03, subordinate=03, sec-latency=32
> I/O behind bridge: 0000d000-0000dfff
> Memory behind bridge: d4000000-dfffffff
> Prefetchable memory behind bridge: 00000000fdd00000-00000000fddfffff
> Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort-
> <TAbort- <MAbort+ <SERR- <PERR-

The Master Abort you see here on the secondary side of the bridge is
likely because the CX23418 failed to respond to at least 1 PCI bus
access.  Since the bridge is set for subtractive decode, I think the PCI
chipset does a retry, so the CX23418 responds properly the second time
around and the CX23418 "works" for you. (I have to check the PCI spec
about retries to be sure).

Regards,
Andy


> BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
> Capabilities: [50] Subsystem: Acer Incorporated [ALI] Unknown device
> 0104
> 00: 86 80 48 24 07 00 10 00 e2 01 04 06 00 00 01 00
> 10: 00 00 00 00 00 00 00 00 00 03 03 20 d0 d0 80 22
> 20: 00 d4 f0 df d1 fd d1 fd 00 00 00 00 00 00 00 00
> 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 00 00 00
> 
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