On Mon, Feb 08, 2016 at 05:59:25PM +0000, Robin Murphy wrote: > Hi Mark, > > On 08/02/16 17:50, Mark Rutland wrote: > >On Mon, Feb 08, 2016 at 05:30:49PM +0000, Brian Starkey wrote: > >>Hi, > >> > >>I'm resending these again to try and garner some interest. Without > >>this series, dma-coherent cannot be used on arm64 platforms. > > > >I think you need to characterize that a bit better. I see plenty of > >instances of 'dma-coherent' in dts files, assuming you mean the DT > >dma-coehrent property. > > > >If not, feel free to stop reading now. > > Terminology overload: the dma-coherent DT property is about devices > having cache-coherent access to system memory within the linear map. > The dma-coherent thing here is pretty much the precise opposite of > that - namely creating CPU mappings for memory which belongs to the > device itself and may be behind an I/O bus (e.g. a framebuffer on a > video card).
Phew. Sorry for the noise, and thanks for setting me straight! Mark.
