Re: [RFC PATCH 0/3] staging: remove fbdev drivers

From: Gerd Hoffmann
Date: Tue Dec 13 2016 - 03:49:52 EST


> The acceleration that most of the 2D things provide isn't ever that
> great, and shadowing is a lot more effective if done properly.

That is probably true for anything pci-ish, because those devices are
optimized for memory writes and reads are horribly slow. So you surely
want avoid device memory reads and shadowing is a effective way to do

On arm hardware the tradeoff may look quite different, the cpus are
relatively slow and I think most arm gpus don't have dedicated device
memory ...