tree 818b15a0c9503e39210967c1d7adc021c5cfe53a
parent 75104fa4f98cdac5e97be5cb59463d49eb08da85
author Alex Deucher <alexander.deucher@amd.com> 1345065522 -0400
committer Alex Deucher <alexander.deucher@amd.com> 1348161033 -0400

drm/radeon: properly handle mc_stop/mc_resume on evergreen+ (v2)

- Stop the displays from accessing the FB
- Block CPU access
- Turn off MC client access

This should fix issues some users have seen, especially
with UEFI, when changing the MC FB location that result
in hangs or display corruption.

v2: fix crtc enabled check noticed by Luca Tettamanti

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>