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Date: Mon, 04 Mar 2013 03:39:05 +0000 From: Ben Hutchings <ben@...adent.org.uk> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: akpm@...ux-foundation.org, Alex Deucher <alexander.deucher@....com> Subject: [ 118/153] drm/radeon/evergreen+: wait for the MC to settle after MC blackout 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher <alexander.deucher@....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@....com> Signed-off-by: Ben Hutchings <ben@...adent.org.uk> --- drivers/gpu/drm/radeon/evergreen.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -1137,6 +1137,8 @@ void evergreen_mc_stop(struct radeon_dev 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) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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