On Mon, Feb 3, 2014 at 11:16 AM, Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx> wrote: > Hello, > > On Mon, Feb 3, 2014 at 7:49 PM, Rob Clark <robdclark@xxxxxxxxx> wrote: >> On Sun, Feb 2, 2014 at 6:50 PM, Dmitry Eremin-Solenikov >> <dbaryshkov@xxxxxxxxx> wrote: >>> Hello, >>> >>> I'm looking onto writing DRM/KMS drivers for few pieces of >>> embedded equipment. I stumbled upon selecting GEM/TTM/whatever >>> for them. Could you please guide me? >> >> The common choices are either: >> >> * TTM + GEM userspace interface (nouveau and radeon) >> * or just GEM (intel, and most of the ARM devices) >> >> TTM seems to be mostly advantageous if you need to manage migration >> between VRAM / GART / system RAM. But it sounds like you are talking >> about a UMA system, so maybe TTM doesn't help you as much. > > Thank you for the answer. Indeed I had the feeling that just GEM would be > work for UMA devices. I'm interested about the driver for my second hardware. > It's a separate graphics chip with separate VRAM, no access to system > memory and nearly no advanced capabilities (few 2D accelerations, > but nothing fancy). Would that require TTM, some special setup of GEM > or something completely different? ttm can definitely handle it. Take a look at the mgag200 or cirrus drivers for relatively simple hardware/drivers that use ttm. Alex _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
