From: Alex Deucher Date: Thu, 31 Jan 2013 14:00:52 +0000 (-0500) Subject: drm/radeon/evergreen+: wait for the MC to settle after MC blackout X-Git-Tag: firefly_0821_release~7541^2~50 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ed1d34ff0dc2d2a92764c1a6f07b4a182ef6b88a;p=firefly-linux-kernel-4.4.55.git 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 --- diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 314e2172a884..a75d290b4f96 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -1065,6 +1065,8 @@ void evergreen_mc_stop(struct radeon_device *rdev, struct evergreen_mc_save *sav WREG32(EVERGREEN_D5VGA_CONTROL, 0); WREG32(EVERGREEN_D6VGA_CONTROL, 0); } + /* wait for the MC to settle */ + udelay(100); } void evergreen_mc_resume(struct radeon_device *rdev, struct evergreen_mc_save *save)