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AMD Releases Additional R600 GPU Programming Documentation
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I really hope that the open source drivers will get better soon. But I have doubts if they could ever run gl2benchmark without glitches. fglrx is in a heavy broken state, especially for Xserver 1.4. Since new codebase gl2benchmark test 3/4 do not run and with Xserver 1.4 and 64 bit it just segfaults... 8.40.4 worked btw... Let's see how long it will take to get really good drivers.
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Originally posted by givemesugarr View Poston this i think that we'll see the opensourced part in the mesa driver and we'll see fglrx reducing its size and going on top of mesa. but i don't expect it to happen until 2-3 months considering the development cycle we all know about. the issue that makes me worry is the imminent kernel bump which will let us know if the fglrx devs would catch up with the new kernel fast.
Because when I set the opengl profile to xorg-x11/mesa, so it uses libGL.so from mesa and not the one from fglrx, 3D acceleration will still work.
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I think the part of fglrx that will be open-sourced is similar to a Gallium3d driver in that it is an "instruction parser" without a state machine or high level api. This probably makes it appropriate as a starting point for a Gallium3d driver. Bridgman says there are architectural differences that might require substantial work before this will work, but it is nonetheless likely an easier, cleaner process than building a tradition mesa driver. In addition, OpenGL 3.0 support will be able to be added fairly quickly after the spec is finalized because of Gallium3d's modularity.
Bridgman, one question though. I've taken a look at the 2d acceleration bits in the radeon driver, and although XAA does work on my x1600, the code looks incomplete and hacky, and EXA isn't functional (at reasonable speeds) at all. Large parts of XAA aren't accelerated, or only partially so. I'm wondering if there is some original 2d engine documentation I can refer to, because I don't think the radeon driver is using all of the card's functionality.
As for EXA, I'm not sure what's causing the issue, I need to try some performance profiling.
I'd like to get some 2d acceleration working for radeonhd, but without a better source than the radeon driver, I don't think the results will be worth the effort. Ultimately, I expect glucose will be the winner (much simpler, resolves lots of issues) but until there's a fully working 3d engine, I want to try putting together a holdover.
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Precisely, R[12]00's HyperZ support is broken.
To quote one of the Mesa developers:Feel free to open an enhancement bug for reading/writing depth with hyperz, but don't expect anyone to fix it...
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>>It's the 2D/3D stuff that we're all craving out here...
Just wanted to remind everyone that the 2d acceleration on the RS690 and the R5xx family is pretty much unchanged from earlier chips. The 2d acceleration code in the radeon driver is actually running on R5xx parts today.
3d acceleration on RS690 is also unchanged from the 4xx parts other than the lack of vertex shaders.
2d acceleration on R6xx parts and 3d acceleration on 5xx/6xx parts are next on the documentation list.
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Originally posted by givemesugarr View Postr100-200 should already be good and done (at least that's what i've read around).
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Originally posted by chrisr View PostOK, so while it's good to see AMD continuing to honour its commitment, there's nothing here for R[1-5]00 owners yet, is there. It's the 2D/3D stuff that we're all craving out here...
the opensourcing of fglrx is a good thing for r300-r500 parts.
the issue is that i suspect that the documentation for the r3-400 is full of ndas while the r500 isn't working so bad and it should also benefit from code for the first r600 series at least in the 2d engine. maybe until the end of the year there will be releases for older hw. let's just hope that the docs will arrive for all the boards until the end of the year.
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Only a small amount of cheer here.
Originally posted by phoronix View PostPhoronix: AMD Releases Additional R600 GPU Programming Documentation
In the second NDA-free documentation dump, AMD has just released programming data on the M76 and RS690 graphics processors
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Originally posted by phoronix View PostPhoronix: AMD Releases Additional R600 GPU Programming Documentation
In the second NDA-free documentation dump, AMD has just released programming data on the M76 and RS690 graphics processors. While the RadeonHD developers have already had these documents, this information will help the free software community in understanding the internal workings of AMD's graphics processors. In this article, we have information on this just-released data as well as what else the community can expect in the way of documentation in the near future.
http://www.phoronix.com/vr.php?view=11655
does that mean that we can get new fglrx opengl core on top of mesa, or only the opensourced part of it, whatever it is?
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sweet. it just can't get any better. unless ati releases more docs
AMD will be open-sourcing part of their new proprietary OpenGL driver and will be in a state so that it can be patched into the existing R300+ Mesa driver.
Next week AMD will likely be making a mirror of the data on their website.
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