On Wed, Mar 7, 2012 at 6:05 AM, Tomi Valkeinen <tomi.valkeinen@xxxxxx> wrote: > > Does this "DMM has become synonymous" mean that people just started > calling TILER DMM, and thus the name has stuck, or are there technical > reasons to handle it as DMM in the kernel? If the former, and if TILER > is the technically exact name for it, perhaps it would make sense to > call it TILER, as that's what (at least I) would be looking for if I > read the TRM and try to find the code for the TILER. > > Tomi Well the breakdown of the DMM/Tiler kind of goes like this. The DMM defines a set of registers used to manipulate the PAT table that backs the address space with physical memory. The Tiler portion of the DMM really just describes the address space that is exposed. Depending on what address range you access, you'll get a different mode of access and rotation. Management of the address space is attributed to the Tiler as well and that is where we have managed the address space and provided APIs to reserve address space and pin/unpin memory to those regions. >From a hardware perspective, we need access to the resources provided by the DMM so that we can do the PAT programming and that can only be gotten from the hwmod entry. And if you use the hwmod device entry, you have to match the name used for that entry. Regards, Andy -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
