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Date:      Thu, 29 Nov 2012 22:56:03 -0600 (CST)
From:      Nathan Whitehorn <nwhitehorn@freebsd.org>
To:        matt <sendtomatt@gmail.com>
Cc:        x11@freebsd.org, freebsd-ppc@freebsd.org
Subject:   Re: PPC DRM graphics testing
Message-ID:  <alpine.BSF.2.00.1211292254060.46502@banshee.munuc.org>
In-Reply-To: <50B82E9C.5030800@gmail.com>
References:  <50972E9E.3010101@gmail.com> <50974ECD.5010702@fgznet.ch> <50988FE0.9030806@gmail.com> <50989EA0.5020509@fgznet.ch> <5098CA4F.7020306@gmail.com> <509A8B3D.8030703@fgznet.ch> <50B82E9C.5030800@gmail.com>

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On Thu, 29 Nov 2012, matt wrote:

> On 11/07/12 08:24, Andreas Tobler wrote:
>> On 06.11.12 09:29, matt wrote:
>>> On 11/05/12 21:22, Andreas Tobler wrote:
>>>> Hm, I can try to bring the Radeon 9200 PCI up and see how it behaves.
>>>> It'll take a few moments. But at least we have another config to compare.
>>>>
>>>> Oh, and one thing to note, my config works with built-in (not a kernel
>>>> module) drm/radeondrm. Have you tried this too?
>>>>
>>>> Kernel config:
>>>> # Direct Rendering modules for 3D acceleration.
>>>> device          drm            # DRM core module required by DRM drivers
>>>> device          radeondrm      # ATI Radeon
>>>>
>>>>
>>>> Attached the patch to make it compile.
>>>>
>>>> Andreas
>>>>
>>>>
>>>>
>>> A good idea, but it didn't help. Backtrace was slightly different, but
>>> nothing decisive. exaCopyDirty() seems to be involved quite often.
>>>
>>> I also found 7.7 will not work, because although they left in r200, they
>>> stripped out UMS.
>>>
>>> So it's back to the drawing board, or at least poking at sources and/or
>>> gdb for a while :)
>> Just a short notice from my side. I finally managed to get the pci
>> radeon 9200 work, means I can startx.
>> I had some issues until I found out how to make Xorg recognize the pci
>> card which is not in the primary pci domain.
>>
>> I needed this string in the xorg.conf, under the section "Device"
>>
>> BusID       "PCI:1@1:2:0"
>>
>> Important is ":domain@bus:".
>>
>> Regarding drm, I get hardlocks as soon as I start glxgears or other
>> samples. No more info yet.
>>
>> Here the render string:
>> ---
>> direct rendering: Yes
>> OpenGL renderer string: Mesa DRI R200 (RV280 5961) 20090101  TCL
>> ---
>>
>> Chipset: "ATI Radeon 9200 5961 (AGP)" (ChipID = 0x5961)
>> Mapped VideoRAM: 131072 kByte (128 bit DDR SDRAM)
>>
>> Note, it is a PCI card, not an AGP one.
>>
>> Also, I do run old Xorg (X.Org X Server 1.7.7 and the 6.14.3 ati pkg.).
>>
>> I'll continue playing a bit.
>>
>> Andreas
>>
>>
> I got a Apple OEM Radeon 9260 256M AGP 8x. I chopped the two resistors
> that allow it to work in an MDD, it worked fine for OS X.
>
> I still don't have working DRM, however glxgears actually shows the
> gears. One to two frames are emitted before the card crashes and loops
> in drmCommandNone.
>
> Turning on dev.dri.0.debug=1, I'm seeing an ioctl completing and
> returning '35' periodically. Not sure what a positive return value
> means, or what ioctl is being called (I assume it's a flush or something
> in drmCommandNone).
>
> So I'm starting to think it's the MDD that's the issue, but I'm not sure
> why. I tried adding the 2x_reset quirk in agp.ko, even though it seems
> unecessary and Linux has no 2x quirk for this chipset either.
>
> Doesn't U3 have hardware byteswappers or something...?

Thanks for doing these tests! I wanted to point out that a bug in the AGP 
driver cannot be ruled out. It's fairly simple but never really got tested 
until quite recently when you started looking at this and drm began 
working.
-Nathan



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