drm/vc4: Add specific compatible strings for Cygnus.
authorEric Anholt <eric@anholt.net>
Fri, 28 Apr 2017 22:42:23 +0000 (15:42 -0700)
committerEric Anholt <eric@anholt.net>
Mon, 8 May 2017 19:24:06 +0000 (12:24 -0700)
commitb3f7787b4687b1292e6ac9a3308002adfd9bd394
treec88383290d0d26b7aac3e15c378dab5446a505ec
parent1e70bdcbeb210afedc8f3103ff4fe295c2fa9fc1
drm/vc4: Add specific compatible strings for Cygnus.

Cygnus has V3D 2.6 instead of 2.1, and doesn't use the VC4 display
modules.  The V3D can be uniquely identified by the IDENT[01]
registers, and there's nothing to key off of for the display change
other than the lack of DT nodes for the display components, but it's
convention to have new compatible strings anyway.

Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Rob Herring <robh@kernel.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170428224223.21904-3-eric@anholt.net
Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt
drivers/gpu/drm/vc4/vc4_drv.c
drivers/gpu/drm/vc4/vc4_v3d.c