I am still getting the hang of this code, so it's very very possible
that I am missing something basic here.
I don't think the problem is in the request_aquire function. In fact
that doesn't even appear to be every called. The DVB driver registered
correctly with the cx88-mpeg driver ( cx8802_register_driver). That
driver registers with the pci_driver.
That PCI probe doesn't appear to be actually called. When
cx8802_register_driver starts looping through devices (after the dvb
driver is registered), it doesn't find any devices at all. The
devlist should be (if I read the code correctly) populated by the
cx8802_probe function.
As a quick test, I added the following lines to the
pci_register_driver to see what the system actually sees in the PCI
tables:
/*
.vendor = 0x14f1,
.device = 0x8802,
*/
dev = pci_find_device(0x14f1, 0x8802, dev);
if (dev==NULL) printk(KERN_ERR "%s() did not find any devices
during the probe()\n",__FUNCTION__);
else printk(KERN_ERR "%s() found device",__FUNCTION__);
and sure enough it doesn't find anything.
Here is the lspci -v and lspci -nv
05:00.0 Multimedia video controller: Conexant CX23880/1/2/3 PCI Video
and Audio Decoder (rev 05)
Subsystem: pcHDTV pcHDTV HD3000 HDTV
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium
TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (5000ns min, 13750ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 21
Region 0: Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
05:00.4 Multimedia controller: Conexant CX23880/1/2/3 PCI Video and
Audio Decoder [IR Port] (rev 05)
Subsystem: pcHDTV Unknown device 3000
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium
TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (1500ns min, 63750ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 10
Region 0: Memory at f7000000 (32-bit, non-prefetchable) [size=16M]
Capabilities: [4c] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
05:00.0 0400: 14f1:8800 (rev 05)
Subsystem: 7063:3000
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium
TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (5000ns min, 13750ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 21
Region 0: Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
05:00.4 0480: 14f1:8804 (rev 05)
Subsystem: 7063:3000
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium
TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (1500ns min, 63750ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 10
Region 0: Memory at f7000000 (32-bit, non-prefetchable) [size=16M]
Capabilities: [4c] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
I am a kernel novice, so I might have missed something very basic here.
On 10/15/06, Steven Toth <stoth@xxxxxxxxxxxxx> wrote:
> No cx88-dvb is loaded. When I try to load it:
>
> mediacore:~> sudo /sbin/modprobe cx88-dvb
> FATAL: Error inserting cx88_dvb
> (/lib/modules/2.6.19-rc1-mm1conroe/kernel/drivers/media/video/cx88/cx88-dvb.ko):
> No such device
>
> I have tried using the head version of DVB, and updating the kernel to
> the newest -mm patch, with no luck at all. Any ideas on how to debug
> this or fix this problem?
>
We added patches a few weeks ago to avoid issues like this. Take a look
at the cx88_mpeg_request_acquire function. It calls drv->probe (which
translates into cx88_dvb_advise_acquire). For some reason the probe
fails and the request_acquire function ejects the driver.
I'd do more testing today but time is short, I won't get to this until
late this evening or tomorrow. Feel free to take a loot and/or post any
patches to the list.
Steve
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