drm/radeon/kms: match r6xx/r7xx/evergreen asic_reset with previous asics
Don't reset if the engine isn't busy. This matches the behavior of previous asics. Reseting a non-hung block can lead to a hang. Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=33272 Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@gmail.com>
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@ -2201,6 +2201,9 @@ static int evergreen_gpu_soft_reset(struct radeon_device *rdev)
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struct evergreen_mc_save save;
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u32 grbm_reset = 0;
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if (!(RREG32(GRBM_STATUS) & GUI_ACTIVE))
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return 0;
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dev_info(rdev->dev, "GPU softreset \n");
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dev_info(rdev->dev, " GRBM_STATUS=0x%08X\n",
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RREG32(GRBM_STATUS));
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@ -1287,6 +1287,9 @@ int r600_gpu_soft_reset(struct radeon_device *rdev)
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S_008014_CB2_BUSY(1) | S_008014_CB3_BUSY(1);
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u32 tmp;
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if (!(RREG32(GRBM_STATUS) & GUI_ACTIVE))
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return 0;
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dev_info(rdev->dev, "GPU softreset \n");
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dev_info(rdev->dev, " R_008010_GRBM_STATUS=0x%08X\n",
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RREG32(R_008010_GRBM_STATUS));
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