From: Alex Deucher <alexander.deuc...@amd.com>

They still seem to cause instability on some r6xx parts.
As a follow up, we can switch to using CP DMA for bo
moves on r6xx as a lighter weight alternative to using
the 3D engine. Fixes hangs on some cards with heavy
buffer migration.

Tested-by: J.N. <golden.flee...@gmail.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/radeon/radeon_asic.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_asic.c 
b/drivers/gpu/drm/radeon/radeon_asic.c
index a2802b47..de36c47 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -986,8 +986,8 @@ static struct radeon_asic r600_asic = {
                .blit_ring_index = RADEON_RING_TYPE_GFX_INDEX,
                .dma = &r600_copy_dma,
                .dma_ring_index = R600_RING_TYPE_DMA_INDEX,
-               .copy = &r600_copy_dma,
-               .copy_ring_index = R600_RING_TYPE_DMA_INDEX,
+               .copy = &r600_copy_blit,
+               .copy_ring_index = RADEON_RING_TYPE_GFX_INDEX,
        },
        .surface = {
                .set_reg = r600_set_surface_reg,
@@ -1074,8 +1074,8 @@ static struct radeon_asic rs780_asic = {
                .blit_ring_index = RADEON_RING_TYPE_GFX_INDEX,
                .dma = &r600_copy_dma,
                .dma_ring_index = R600_RING_TYPE_DMA_INDEX,
-               .copy = &r600_copy_dma,
-               .copy_ring_index = R600_RING_TYPE_DMA_INDEX,
+               .copy = &r600_copy_blit,
+               .copy_ring_index = RADEON_RING_TYPE_GFX_INDEX,
        },
        .surface = {
                .set_reg = r600_set_surface_reg,
-- 
1.7.7.5

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