On Wed, 2011-04-13 at 22:05 +1000, Benjamin Herrenschmidt wrote:
On Tue, 2011-04-12 at 10:01 +0200, Cédric Cano wrote:
Hi
Here you are a patch that adds big endian support for rv730 in r600 classic mesa driver. The BE modifications are almost the same as the DRM / DDX driver modifications (http://lists.freedesktop.org/archives/dri-devel/2011-February/008151.html).
I used the mesa-demos to test the driver status on big endian platform. Nearly all demos renders the same as on Intel architecture. Nevertheless, there are still some issues in glReadPixels (r600_blit) with some formats. I can't figure out exactly what and when data must be swapped (set_tex_resoures, set_render_target...). Review of the patch would be greatly appreciated.
It seems that r600g will be the default for Mesa 7.11 so I'll try to enable big endian support for Gallium now.
Cool stuff !
I'll try to test that one of these days on various ppc's
BTW. I see you used some FSL embedded board. Do you have your PCIe MMIO space above 32-bit ? Last I looked, there was a bunch of fixing needing to be done, among others in the TTM, to make that work.
I had some preliminary patches but they bitrot... mostly the issue is to make sure than a phys_addr_t is used instead of an unsigned long whenever it tries to store the physical address of an object.
Ben.