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-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ed39fadd6df01095378e499fac3674883f16b853;p=linux-beck.git 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 Cc: stable@vger.kernel.org --- 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)