tree 49f9f82095bd764640e6edf4d416239f96f8f426
parent deb4765db386db67626ffd075d8b5eb5fdf9c4f6
author Eric Anholt <eric@anholt.net> 1467403838 -0700
committer Eric Anholt <eric@anholt.net> 1468508915 -0700

drm/vc4: Add a getparam ioctl for getting the V3D identity regs.

As I extend the driver to support different V3D revisions, userspace
needs to know what version it's targeting.  This is most easily
detected using the V3D identity registers.

v2: Make sure V3D is runtime PM on when reading the registers.
v3: Switch to a 64-bit param value (suggested by Rob Clark in review)

Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v2)
Reviewed-by: Rob Clark <robdclark@gmail.com> (v3, over irc)