Re: [Dri-users] Savage driver core rework]

[Jacopo G. <sbr...@fa...>]

Alex Deucher ha scritto:

>Based on some research and feedback I've gotten, I've re-structured the
>GBD, COB, and streams code.  I put together a document based on my
>findings here:
>http://www.botchco.com/alex/savage/Savage_Guide.txt
>
>I've tested on savage4 and savage IX, and all seems well.  I'd like to
>get more feedback from savage3D, twister, non-DDR prosavage, and
>savage2000 users.  I haven't gotten any feedback from savage3d users at
>all yet, although, I doubt there are many as I don't think S3 released
>many savage3D chips.  I originally assumed twister worked like
>prosavage/DDR, but it seems to be more like savage4.  this is backed up
>by some info on via's website (see the savage guide above) and feedback
>from some users. I don't think we've gotten any testers yet on non-DDR
>prosavage, so I'd like to get some feedback on that as well.  Also, I
>think DDR, Prosavage, and 2000 share the same 2d engine and possibly
>streams, I'd like to get some feedback from savage2000 users to make
>sure tiled mode and 2d (and possibly streams) works with the dri savage
>driver.  Savage2000 users, please try both tiled and linear mode
>(option "disabletile").  Unfortunately, there is no 3D support for
>savage2000 yet and it won't happen until S3 releases some code or a
>databook.
>
>Issues:
>
>1. Cursor corruption.  The cobIndex bitfield of register 48C14 seems to
>vary between series and revisions of twister/prosavage/savage4/2000. if
>you are getting hardware cursor corruption, try the "disablecob" option
>to disable it.  alternatively, you can try setting psav->cobIndex to 7
>from 2 or vice versa in savage_driver.c.  unfortunately, I don't know
>which revisions use which bitfield layout.  Twisters and early revision
>savage4 chips seem to use 7, while supersavage, newer savage4 and DDR
>chips seem to use 2.  
>
>2. Scrambled 3D window.  This is due to variations in the bitmap
>descriptor layout between chips.  The two important fields seem to be
>the tile format field and the bci enable bit.  I haven't sorted all of
>these out yet.  savage4 and twister seem to be the same and prosavages,
>DDRs, and 2000 seem to be the same, but there may be further variation.
>
>Tim, regarding 1 and 2, do you have any idea which chips use which
>layout, and also how we can find out the chip revisions so we can set
>this properly?
>
>My patch is against the savage driver in DRI cvs.  See this page for
>more on how to download and build cvs:
>http://dri.sourceforge.net/cgi-bin/moin.cgi/Building
>I've attached my patch and it's also available here:
>http://www.botchco.com/alex/savage/core-rework/core-rework.diff
>I've also created a binary (build on redhat9) for those that want to
>try:
>http://www.botchco.com/alex/savage/core-rework/savage_drv.o
>
>Please send feedback to myself and dri-devel.
>
>Thanks,
>
>Alex
>
>
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Just tried the binary on my twister-k with mandrake 9.2 and kernel 2.6.4 
(vanilla). It loads an unusable X with weird colors and slooooow mouse 
that crashes just after loading KDE.