freedreno: move legacy kgsl related README

Signed-off-by: Rob Clark <robclark@freedesktop.org>
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Rob Clark 2016-07-20 13:11:58 -04:00
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This is a historical discription of what is now the kgsl backend
in libdrm freedreno (before the upstream drm/msm driver). Note
that the kgsl backend requires the "kgsl-drm" shim driver, which
usually is in disrepair (QCOM does not build it for android), and
due to random differences between different downstream android
kernel branches it may or may not work. So YMMV.
Original README:
----------------
Note that current msm kernel driver is a bit strange. It provides a
DRM interface for GEM, which is basically sufficient to have DRI2
working. But it does not provide KMS. And interface to 2d and 3d