From 01d0ec41cdd30d9ce08f228f950a5e9db8cf386f Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 31 Jan 2013 09:01:59 -0500 Subject: [PATCH] drm/radeon/r5xx-r7xx: 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. Reported-by: Shuah Khan Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/rv515.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/gpu/drm/radeon/rv515.c b/drivers/gpu/drm/radeon/rv515.c index 2bb6d0e..435ed35 100644 --- a/drivers/gpu/drm/radeon/rv515.c +++ b/drivers/gpu/drm/radeon/rv515.c @@ -336,6 +336,8 @@ void rv515_mc_stop(struct radeon_device *rdev, struct rv515_mc_save *save) WREG32(R600_CITF_CNTL, blackout); } } + /* wait for the MC to settle */ + udelay(100); } void rv515_mc_resume(struct radeon_device *rdev, struct rv515_mc_save *save) -- 1.7.7.5