Commit ed39fadd authored Jan 31, 2013 by Alex Deucher

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

parent f689e3ac

drivers/gpu/drm/radeon/evergreen.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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)