-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Nicolai Haehnle wrote:
> I don't see any reason for mapping registers into userspace in the first > place. Except for mode setting and related setup tasks (which aren't > exactly performance critical), you'll never want to write to registers > directly but go through a DMA'd command stream. > > Okay, there may be ancient hardware that doesn't support that mode of > operation. But why not get rid of register maps completely for everything > else? Some drivers (e.g., pre-3.2 MGA DRM) poll registers to know when the engine is idle. The radeon / r200 drivers can also fallback to something similar if interrupts are not available. I think some of the other drivers may do similar things. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCtv2zX1gOwKyEAw8RApvqAJ9WKrppm2UgPLJXap9BXIZ6WeS4JgCgkLgw 25gQUiS+sUmxjl/DHPvdwjI= =5IVT -----END PGP SIGNATURE----- ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
