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authorAlex Deucher <alexander.deucher@amd.com>2013-01-14 11:04:39 -0500
committerAlex Deucher <alexander.deucher@amd.com>2013-01-15 09:06:38 -0500
commit19fc42ed9950d5fe17089c0a928121047c882092 (patch)
tree2cf4b53dcf43d870e6c1e9d3b7492381c1062005 /drivers/gpu/drm/radeon/ni.c
parent7b4cf994e4c6ba48872bb25253cc393b7fb74c82 (diff)
downloadlinux-19fc42ed9950d5fe17089c0a928121047c882092.tar.bz2
drm/radeon: clear reset flags if engines are idle
Fixes a hard lock in the gpu reset code after the rework for DMA support (0ecebb9e0d14e9948e0b1529883a776758117d6f "drm/radeon: switch to a finer grained reset for evergreen") due to not bailing before the MC shutdown if the relevant engines are idle. Discussion: http://lists.freedesktop.org/archives/dri-devel/2013-January/032985.html Reported-by: Eldad Zack <eldad@fogrefinery.com> Tested-by: Eldad Zack <eldad@fogrefinery.com> Acked-by: Paul Menzel <paulepanter@users.sourceforge.net> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/ni.c')
-rw-r--r--drivers/gpu/drm/radeon/ni.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 896f1cbc58a5..59acabb45c9b 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -1409,6 +1409,12 @@ static int cayman_gpu_soft_reset(struct radeon_device *rdev, u32 reset_mask)
{
struct evergreen_mc_save save;
+ if (!(RREG32(GRBM_STATUS) & GUI_ACTIVE))
+ reset_mask &= ~(RADEON_RESET_GFX | RADEON_RESET_COMPUTE);
+
+ if (RREG32(DMA_STATUS_REG) & DMA_IDLE)
+ reset_mask &= ~RADEON_RESET_DMA;
+
if (reset_mask == 0)
return 0;