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authorAlex Deucher2013-01-31 09:00:52 -0500
committerAlex Deucher2013-01-31 09:03:22 -0500
commited39fadd6df01095378e499fac3674883f16b853 (patch)
tree82e2bd57b1b961f69a5eae4f877e5afeb63b816d /drivers/gpu
parentf689e3acbd2e48cc4101e0af454193f81af4baaf (diff)
drm/radeon/evergreen+: wait for the MC to settle after MC blackout
Some chips seem to need a little delay after blacking out the MC before the requests actually stop. May fix: https://bugs.freedesktop.org/show_bug.cgi?id=56139 https://bugs.freedesktop.org/show_bug.cgi?id=57567 Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/radeon/evergreen.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 2270867d8551..a2d478e8692a 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -1349,6 +1349,8 @@ void evergreen_mc_stop(struct radeon_device *rdev, struct evergreen_mc_save *sav
blackout &= ~BLACKOUT_MODE_MASK;
WREG32(MC_SHARED_BLACKOUT_CNTL, blackout | 1);
}
+ /* wait for the MC to settle */
+ udelay(100);
}
void evergreen_mc_resume(struct radeon_device *rdev, struct evergreen_mc_save *save)