From 36509fceeabafd1a6e95e48ae75efe020fa59937 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 31 Jan 2013 09:00:52 -0500 Subject: [PATCH] drm/radeon/evergreen+: wait for the MC to settle after MC blackout commit ed39fadd6df01095378e499fac3674883f16b853 upstream. 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 Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/evergreen.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 4a1d8f3457cc..e664e0414c6f 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -1179,6 +1179,8 @@ 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) -- 2.43.0