| From | Herton Ronaldo Krzesinski <> | Subject | [PATCH 22/81] drm/radeon/evergreen+: wait for the MC to settle after MC blackout | Date | Tue, 19 Feb 2013 15:48:45 -0300 |
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3.5.7.6 -stable review patch. If anyone has any objections, please let me know.
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From: Alex Deucher <alexander.deucher@amd.com>
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 <alexander.deucher@amd.com> Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> --- 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 4170e1e..ccac010 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -1183,6 +1183,8 @@ 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) -- 1.7.9.5
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