Nouveau - Feb 2008 - [Bug 14393] New: NV11 card is not detected properly by nouveau on big-endian box

http://bugs.freedesktop.org/show_bug.cgi?id=14393

           Summary: NV11 card is not detected properly by nouveau on big-
                    endian box
           Product: xorg
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: henrik.sorensen at gmail.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=14162)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14162)
Xorg log

The system is a gigabit g4 powermac with a PC AGP NV11 (10de:0110) flashed with
a mac ROM. 

While the drm module seems to identify it as a NV11, the nouveau ddx driver
does not.


[drm] Detected an NV11 generation card (0x011000b2)
vs 
(--) NOUVEAU(0): Chipset: "NVIDIA NV20"

There's also a message in further down in the log that seems to suggest
endian
issues.

(EE) NOUVEAU(0): Card is in big endian mode, something is very wrong !


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--- Comment #1 from Henrik S?rensen <henrik.sorensen at gmail.com> 
2008-02-05 17:07:24 PST ---
Created an attachment (id=14163)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14163)
Kernel log


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Henrik S?rensen <henrik.sorensen at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #14162|0                           |1
        is obsolete|                            |




--- Comment #2 from Henrik S?rensen <henrik.sorensen at gmail.com> 
2008-02-14 07:05:43 PST ---
Created an attachment (id=14309)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14309)
X log


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--- Comment #3 from Henrik S?rensen <henrik.sorensen at gmail.com> 
2008-02-14 07:06:44 PST ---
Either because of code changes or due to the system firmware being upgraded to
4.2.8, the card is now detected as a nv11. However it does not get far without
crashing with a fifo lockup, the x checkboard partern and x cursor is shown for
only a second.


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Henrik S?rensen <henrik.sorensen at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|NV11 card is not detected   |fifo lockup with nv11 in ppc
                   |properly by nouveau on big- |machine
                   |endian box                  |




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Henrik S?rensen <henrik.sorensen at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #14163|0                           |1
        is obsolete|                            |




--- Comment #4 from Henrik S?rensen <henrik.sorensen at gmail.com> 
2008-02-14 07:08:03 PST ---
Created an attachment (id=14310)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14310)
kernel log


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Henrik S?rensen <henrik.sorensen at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #14162|1                           |0
        is obsolete|                            |




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Henrik S?rensen <henrik.sorensen at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #14163|1                           |0
        is obsolete|                            |




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--- Comment #5 from Henrik S?rensen <henrik.sorensen at gmail.com> 
2008-02-14 08:10:25 PST ---
Sigh.. I was way to quick. The card had been initialised by the nv driver
before  I started X with the nouveau driver. If the machine is booted without
nv having run, it is back to the old behaviour. (NV20 detected and 0 MiB of
ram).


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Henrik S?rensen <henrik.sorensen at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|fifo lockup with nv11 in ppc|Card detected as NV20
                   |machine                     |(endian issue?) With nv
                   |                            |driver run first, fifo
                   |                            |lockup on nv11ppc machine




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--- Comment #6 from Danny <obiwan at mailmij.org>  2008-07-10 21:28:09 PST
---
Created an attachment (id=17630)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=17630)
correctly set endian access in nouveau_state.c

The first issue (card being in the wrong mode) is probably a bug in the drm. 
Both nv and nvidiafb set up BE access by writing 0x01000001 to NV03_PMC_BOOT_1
(instead of 0x00000001 as done by drm). This also explains why it worked after
running nv (nv set up the card correctly).

Patch is attached. The second problem is probably something else. It may have
been fixed in the meantime, so pls test.

Actually, the drm used to write 0x01000001 but this was changed by marcheu in
commit 30353c8efcc026ee8940f3eadab084c42a3acd4e. I do not know the reason of
this change.

d.


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--- Comment #7 from Pekka Paalanen <pq at iki.fi>  2009-09-23 04:56:41 PST
---
The code in current DRM still is:

#ifdef __BIG_ENDIAN
        /* Put the card in BE mode if it's not */
        if (nv_rd32(dev, NV03_PMC_BOOT_1))
                nv_wr32(dev, NV03_PMC_BOOT_1, 0x00000001);

        DRM_MEMORYBARRIER();
#endif

Does the patch change anything?
How does Nouveau currently work with and without the patch?

The patch may not apply as is, but you can easily do the equivalent change by
hand in drivers/gpu/drm/nouveau/nouveau_state.c in the nouveau/linux-2.6 kernel
tree, near line 540.


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--- Comment #8 from Chi-Thanh Christopher Nguyen <chithanh at
cs.tu-berlin.de>  2009-09-23 05:16:57 PST ---
Reports in IRC suggest that the issue still exists.

It might be a good idea to ask the committer of
30353c8efcc026ee8940f3eadab084c42a3acd4e what was the reasoning behind the
change.


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--- Comment #9 from Stephane Marchesin <marchesin at icps.u-strasbg.fr> 
2009-09-23 05:27:20 PST ---
(In reply to comment #8)
> Reports in IRC suggest that the issue still exists.
> 
> It might be a good idea to ask the committer of
> 30353c8efcc026ee8940f3eadab084c42a3acd4e what was the reasoning behind the
> change.
> 
That change was motivated by the fact that it fixed at least one system.

If you (PPC guys) can come up with a patch that pleases everyone with a PPC, I
think we're more than happy to merge it...


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--- Comment #10 from Emil Velikov <emil.l.velikov at gmail.com> 2011-08-23
13:32:07 PDT ---
Changes almost identical to the proposed patch are part of upstream for a while
now.

Can you try the latest nouvea-git or linux-3.1

Both of which include the commit "drm/nouveau: fix big-endian switch"

Thanks

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Marcin Slusarz <marcin.slusarz at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

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