On Sunday 21 December 2008, Felipe Contreras wrote: > On Mon, Dec 22, 2008 at 4:19 AM, David Brownell wrote: > > In short: it's the same kind of cache line sharing issue > > that any other DMA-using software needs to be aware of, > > ... > > Do you know of any software doing some kind of processing that sends > the data back? My guess is that there isn't a lot of software doing > that.
I wouldn't know about such hardware, but I'd be shocked to learn that TI's products are the first to offload image processing tasks to hardware. Workstations have done such stuff for at least 25 years now, which is enough time to have tried a LOT of hardware variations. Surely at least one non-TI variation wrote data back, in those years... I'm just saying this is really a bog-standard issue. Maybe it's a surprise in this context for some reason; current Open Source tools might easily have made unwise x86-oriented assumptions, like caches being DMA-coherent. Tools moving for the first time to new platforms tend to uncover a lot of portability glitches. They get fixed. - Dave -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
