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| author | Alex Deucher <alexander.deucher@amd.com> | 2013-01-31 09:00:52 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-11 09:04:42 -0800 |
| commit | 83f83a00c02e221cb9b433e184990666111685cd (patch) | |
| tree | 0fd1155044006bb2a1b2be39989d0e902b259c93 /drivers | |
| parent | 9cf4086a08c444f2455f0bdd13b9d545e7c7d1fa (diff) | |
| download | lwn-83f83a00c02e221cb9b433e184990666111685cd.tar.gz lwn-83f83a00c02e221cb9b433e184990666111685cd.zip | |
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 <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/radeon/evergreen.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 18a5382af672..24c5f0ba8967 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -1345,6 +1345,8 @@ 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) |