Hi Vinod, On Mon, May 18, 2015 at 01:46:14PM +0200, Maxime Ripard wrote: > Hi Vinod, > > I know that the memset capabilities have been removed a while back > because no-one was actually using it. > > On the Atmel SAMA5D4, we would really benefit from such a feature in > the kernel. Indeed, that SoC lacks a GPU, even though having a > display, so we can actually use the DMA controller to accelerate the > framebuffer manipulations instead of the GPU or some hardware > controller like usually done, involving using memset. > > The current way that it's done is through an userspace API for > dmaengine. Maybe that could be moved to the DRM driver for this SoC, I > don't know and we can argue about this, but the bottom line is that > for our use case, we do need to have memset back :) > > I understand that you might not like it, especially since we're not > really introducing a new user and even the current code we have based > on this is far from upstreamable, so we won't even introduce any user > for that code short term. > > Apart from that, that serie is based on the interleaved support for > that driver I sent earlier today. > > Thanks, > Maxime Any comments on that serie? Thanks, Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com
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