tree 02ebcb40b55ce672a3a093e712eddbf8863f811d
parent b03c8f19ae0d7e1f9f27ff258e72a37dfb87f323
author Nico Huber <nico.h@gmx.de> 1503580371 +0200
committer Nico Huber <nico.h@gmx.de> 1513088763 +0000

gma: Set tiled framebuffers up through Plane_Control

On platforms with Plane_Control registers (Broxton/Skylake+) we can
use X and Y tiled framebuffers for scanout (older platforms support
X tiling only). As our main use case is 90° rotation with Y tiled
framebuffers, we implement it for the newer platforms only for now.

We also set up a fence register for linear access to the tiled frame-
buffer through the aperture.

Change-Id: I913c82f62fd28b681a06ce13f41160a07e559799
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/22709
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: Stefan Reinauer <stefan.reinauer@coreboot.org>