On Fri, 2008-08-29 at 15:01 -0400, Andy Walls wrote: > Hi all, > > I have a question. > > For users of HVR-1600 and other CX23418 based cards that basically work: > is your card behind a PCI-PCI bridge chip that is set for "subtractive > decode"? > > For users of HVR-1600 and other CX23418 based cards that basically don't > work: Is your card behind a not behind a PCI-PCI bridge chip that is set > for "subtractive decode" (i.e. directly behind a host bridge, or behind > a PCI-PCI bridge set for positive decode)?
Wow, I need to learn how to type. Let me try that second one again: For users of the HVR-1600 and other CX23418 based cards that basically don't work: Is your card not behind a PCI-PCI bridge chip that is set for "subtractive decode" (i.e. directly behind a host bridge, or behind a PCI-PCI bridge set for positive decode)? Regards, Andy > Here's an example, run as root, showing how to see if you have the > CX23418 behind a PCI-PCI bridge set for subtractive decode: > > # lspci -tvv > -[0000:00]-+-00.0 ATI Technologies Inc Unknown device 7911 > +-01.0-[0000:01]----05.0 ATI Technologies Inc Radeon 2100 > [...] > +-14.4-[0000:03]--+-02.0 Internext Compression Inc iTVC16 > (CX23416) MPEG-2 Encoder > | \-03.0 Conexant CX23418 Single-Chip MPEG-2 > Encoder with Integrated Analog Video/Broadcast Audio Decoder > [...] > > >From the tree view above, we see the CX23418 is behind the bridge at > 00:14.4. > > # lspci -s 0:14.4 -vv -x > 00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge (prog-if 01 > [Subtractive decode]) > > ^^^^^^^^^^^^^^^^^^^^^^^ > [...] > 00: 02 10 84 43 07 01 a0 02 00 01 04 06 00 40 81 00 > ^^^^^^^^ > || > Subtractive Decode PCI-PCI ----++ > [...] > > Here we see in the first text line for the bridge, lspci has shown us > its a PCI-PCI bridge in subtractive decode. This could also be read off > of bytes 09x-0xb of the configuration space. The byte at 0x9 being 1 > indicate subtractive decode vs positive decode. > > > > Thanks in advance for your responses. > > Regards, > Andy > > > > > > _______________________________________________ > ivtv-users mailing list > [email protected] > http://ivtvdriver.org/mailman/listinfo/ivtv-users > _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
