Am Mittwoch, den 09.03.2016, 12:25 +0000 schrieb Russell King - ARM Linux: > On Mon, Feb 29, 2016 at 05:20:16PM +0100, Lucas Stach wrote: > > If the end of the system DMA window is farther away from the start of > > physical RAM than the size of the GPU linear window, move the linear > > window so that it ends at the same address than the system DMA window. > > > > This allows to map command buffer from CMA, which is likely to reside > > at the end of the system DMA window, while also overlapping as much > > RAM as possible, in order to optimize regular buffer mappings through > > the linear window. > > I've been pondering this for a while now, and I think we should not > do this unconditionally - it should be predicated on the MC20 feature - > both for the original code and the new code. If we don't have the MC20 > feature, we end up with more memory spaces than we can cope with. > > If we don't have MC20, but we need to offset, that's an error which > can lead to memory corruption. > This makes sense. I guess not using the offset on MC10 will also allow you to enable TS on those parts? In that case we might advertise this with a patchlevel change of the API. Regards, Lucas _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
