drm/radeon: don't probe MST on hw we don't support it on
authorDave Airlie <airlied@redhat.com>
Thu, 18 Jun 2015 04:29:18 +0000 (14:29 +1000)
committerChristian König <christian.koenig@amd.com>
Thu, 18 Jun 2015 18:36:56 +0000 (20:36 +0200)
commit7f017e56770e82c8fe2d4d8c59e58f519f455ad7
tree760f4476788856c7f20fcafc14a1d12db2761f91
parent3bc980bf19bb62007e923691fa2869ba113be895
drm/radeon: don't probe MST on hw we don't support it on

If you do radeon.mst=1 on a gpu without mst hw, and then
plug some mst hw it will oops instead of falling back.

So check we have DCE5 at least before proceeding.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
drivers/gpu/drm/radeon/radeon_dp_mst.c