This improves GLX DRI3 Gpu offloading significantly on cpu
bound benchmarks particularly.
No performance impact for DRI2 Gpu offloading.

Signed-off-by: Axel Davy <axel.d...@ens.fr>
---
 src/gallium/drivers/radeonsi/si_blit.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/gallium/drivers/radeonsi/si_blit.c 
b/src/gallium/drivers/radeonsi/si_blit.c
index 6bc89ab..0e327b5 100644
--- a/src/gallium/drivers/radeonsi/si_blit.c
+++ b/src/gallium/drivers/radeonsi/si_blit.c
@@ -712,6 +712,21 @@ static void si_blit(struct pipe_context *ctx,
                return;
        }
 
+       if (info->src.box.width ==  info->dst.box.width &&
+           info->src.format == info->dst.format &&
+           info->src.box.width >=0 &&
+           info->src.resource->nr_samples == 0 &&
+           info->dst.resource->nr_samples == 0 &&
+           info->src.box.depth == 1 &&
+           info->dst.box.depth == 1 &&
+           info->mask == PIPE_MASK_RGBA) {
+               sctx->b.dma_copy(ctx, info->dst.resource, info->dst.level,
+                                info->dst.box.x, info->dst.box.y,
+                                info->dst.box.z, info->src.resource,
+                                info->src.level, &(info->src.box));
+               return;
+       }
+
        assert(util_blitter_is_blit_supported(sctx->blitter, info));
 
        /* The driver doesn't decompress resources automatically while
-- 
1.9.1

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