From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 15 Aug 2012 21:18:42 +0000 (-0400)
Subject: drm/radeon: properly handle mc_stop/mc_resume on evergreen+ (v2)
X-Git-Tag: v3.2.32~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bdaa64973474612383fc8f144646174ddcfd9db6;p=pandora-kernel.git

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

commit 62444b7462a2b98bc78d68736c03a7c4e66ba7e2 upstream.

- 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>
[bwh: Backported to 3.2:
 - Drop DCE6 cases
 - Call evergreen_mc_wait_for_idle() directly
 - Add dce4_wait_for_vblank() (commits 3ae19b750bdc09ce233e1504348320141593ffda
   and 4a15903db02026728d0cf2755c6fabae16b8db6a) and call it directly
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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