diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2015-03-02 20:42:53 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-26 15:06:51 +0100 |
| commit | 336163cf1efa4ecb05ce33d64e4b32c93aa10e04 (patch) | |
| tree | a7b18b67f6758ad4ab3209bb36aad8801c26cc86 | |
| parent | 896bda003c628a5ca26b8f878d1f2e87ce132fae (diff) | |
drm/radeon: do a posting read in evergreen_set_irq
commit c320bb5f6dc0cb88a811cbaf839303e0a3916a92 upstream.
To make sure the writes go through the pci bridge.
bug:
https://bugzilla.kernel.org/show_bug.cgi?id=90741
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/radeon/evergreen.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 7138f3e31b7c..ee9f0b4e90d6 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -4596,6 +4596,9 @@ int evergreen_irq_set(struct radeon_device *rdev) WREG32(AFMT_AUDIO_PACKET_CONTROL + EVERGREEN_CRTC4_REGISTER_OFFSET, afmt5); WREG32(AFMT_AUDIO_PACKET_CONTROL + EVERGREEN_CRTC5_REGISTER_OFFSET, afmt6); + /* posting read */ + RREG32(SRBM_STATUS); + return 0; } |