Hi Laurent On Fri, 1 Apr 2011, Laurent Pinchart wrote: [snip] > - Cache management (ISP and DSS) > > Cache needs to be synchronized between userspace applications, kernel space > and hardware. Synchronizing the cache is an expensive operation and should be > avoided when possible. Userspace applications don't need to select memory > mapping cache attributes, but should be able to either handle cache > synchronization explicitly, or override the drivers' default behaviour. So, what cache attributes are currently used by the driver? Presumably, it is some cacheable variant? And which way should the application be able to override the driver's behaviour? One of these overrides would probably be "skip cache invalidate (input) / flush (output)," right? Anything else? Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
