Messages in this thread | | | Date | Fri, 5 Apr 2002 11:31:56 +1000 | From | Andre Pang <> | Subject | Re: Summary of KL133/KM133 problems w/2.4.18 |
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On Thu, Apr 04, 2002 at 02:23:31PM -0500, Nilmoni Deb wrote:
> I just now discovered from http://www.viaarena.com/?PageID=70 > that: > > KM133 => VT8365 northbridge _always_ > KL133 => VT8361 northbridge _OR_ VT8364 northbridge
Ah! Thanks for that ... viaarena.com should be definitive (since it's an official site), and might solve the whole "my motherboard has a VT836[1234567890xdeadbeef]" game for those K?133 chipsets.
> Now (from kernel 2.4.18) linux-2.4.18/arch/i386/kernel/pci-pc.c has these > comment lines: > > * VIA 8363,8622,8361 Northbridges: > * - bits 5, 6, 7 at offset 0x55 need to be turned off > > It appears that ur patch doesnot affect chipsets with VT8361 northbridge. > > Basically, ur patch is applicable for all KM133 (VT8365) chipsets. > But should it apply only to those KL133 chipsets with VT8364 > northbridge or to KL133 chipsets with VT8361 northbridge too ?
The patch should apply to all KL133 chipsets; from what you've said, that appears to be the VT8361 and VT8364.
The KM133 (VT8365) is a less clear. From what I understand, it has an integrated video card (ProSavage), but it also has an AGP slot so that you can use your own video card if you like. We _may_ want to clear bit 5 if we're not using the integrated ProSavage. The only way to confirm this is to find somebody who has a KM133 who is using an external video card, and see what the Windows VIA drivers do. Any volunteers?
In general though, I think we should apply the same behaviour to the KM133 that we're using for the KL133 -- leave bit 5 alone, and don't clear it. All the VT836?s seem to have issues with touching bit 5, anyway, with or without the integrated ProSavage.
> So, besides the issue of renaming two macros, this patch needs to decide > which (or all) of the two types of KL133 chipsets is to be targeted.
The northbridge chipsets are already correctly detected (revision IDs 0x81/0x84). I'm taking a guess that the VT8365 is revision ID 0x84, and either the VT8361 or VT8364 is revision ID 0x81, but I don't know which one. I'm not sure if finding out what's what is that important (other than being a pedant with the macro names), since we haven't hit anybody yet who has a KL133 with a northbridge that is not a revision of 0x81.
In a nutshell, it's just the macro names and comments which need to be clarified. (Not that they're any less important.) Thanks for pointing out the disparity :).
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