drm/radeon: don't reset dma on r6xx-evergreen init

Otherwise we may lose the DMA golden settings which can
lead to hangs, etc.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/radeon/r600_dma.c b/drivers/gpu/drm/radeon/r600_dma.c
index 51fd985..a908daa 100644 (file)
--- a/drivers/gpu/drm/radeon/r600_dma.c
+++ b/drivers/gpu/drm/radeon/r600_dma.c
@@ -124,15 +124,6 @@ int r600_dma_resume(struct radeon_device *rdev)
        u32 rb_bufsz;
        int r;
 
-       /* Reset dma */
-       if (rdev->family >= CHIP_RV770)
-               WREG32(SRBM_SOFT_RESET, RV770_SOFT_RESET_DMA);
-       else
-               WREG32(SRBM_SOFT_RESET, SOFT_RESET_DMA);
-       RREG32(SRBM_SOFT_RESET);
-       udelay(50);
-       WREG32(SRBM_SOFT_RESET, 0);
-
        WREG32(DMA_SEM_INCOMPLETE_TIMER_CNTL, 0);
        WREG32(DMA_SEM_WAIT_FAIL_TIMER_CNTL, 0);