[ydl-gen] No video hardware acceleration on PS3

[Paulo Pinto]

Hi,

What I don't like on this solution is that it looks like
using a hacked PS3.

Where we are from scratch trying to add hardware support
to a Linux distribution without the vendor's support.

I thought one of the goals of YDL with Sony support, was to
avoid this kind of scenarios.

I'm not saying that we need raw access to PS3's hardware, a
library level access like in PS2 Linux, would already be much
better that the current situation.

Cheers,
Paulo

Quoting John Doe <jdoe06 at hotmail.com>:

> Surely you would have the SPEs render to the local XDR memory (which has 
> higher bandwidth than the VRAM). Or better still, perhaps, use tiling and 
> have the SPEs render into their local SRAM where there is huge bandwidth. 
> Once the frame was done it could then presumably be copied to VRAM for 
> output (if that is necessary).
> 
> Of course, the SPEs alone will never be as good as the GPU in the system. 
> But they could perhaps do a decent job..decent enough for homebrew games and
> 
> the like, in the short term. I think there's lots of interesting things that
> 
> could be done with software rendering on Cell, but in the context of a 
> traditional polygons/texturing pipeline, it'll probably be screamingly fast 
> at the former (transform/lighting), but relatively quite poor at the latter 
> (texturing).
> 
> I think the real question as to whether a port of OGL/Mesa or some other 
> software rendering solution would be worthwhile is how long we'll have to 
> wait for hardware acceleration. If it's only going to be a short time, it 
> may not be worth it (except for one's own education/curiousity)..although 
> it's arguable that it would still be useful even after that, for projects 
> which wanted to mix Cell and RSX rendering.
> 
> 
> >From: David Seikel <onefang at gmail.com>
> >Reply-To: Discussion List for General Yellow Dog Linux User 
> >Topics<yellowdog-general at lists.terrasoftsolutions.com>
> >To: yellowdog-general at lists.terrasoftsolutions.com
> >Subject: Re: [ydl-gen] No video hardware acceleration on PS3
> >Date: Sat, 2 Dec 2006 10:54:55 +1000
> >
> >On Sat, 02 Dec 2006 08:44:30 +1000 Stephen Braithwaite
> ><braithwaite.s at optusnet.com.au> wrote:
> >
> > > Suppose people did get a project together to port Open GL to compute
> > > its pixels and vertices on the 6 available SPE's...
> > > Does anyone know enough about graphics cards to know how fast this
> > > would result.  I think the SPE's would be suitable for this sort of
> > > work, but how would this stack up against a GPU?   Whether or not it
> > > would be worth starting such a project would depend on what sort of
> > > results could potentially be obtained.
> >
> >The main issue will be bandwidth from the SPE's memory to the video
> >memory, and I suspect that has to go through main memory.  The GPU has
> >direct access to video memory, so it will still be a lot faster.
> 
> 
> ><< signature.asc >>
> 
> 
> 
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