[PATCH v2 2/3] etnaviv: add resource subregion copy

[Lucas Stach]

This is useful if we only need to copy part of a larger resource, mostly
when using the RS engine to de-/tile on pipe transfers.

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
Reviewed-by: Wladimir J. van der Laan <laanwj at gmail.com>
---
 src/gallium/drivers/etnaviv/etnaviv_clear_blit.c | 27 ++++++++++++++++++++++++
 src/gallium/drivers/etnaviv/etnaviv_clear_blit.h |  5 +++++
 2 files changed, 32 insertions(+)

diff --git a/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c b/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c
index 8030450dd1b0..971403c45476 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c
@@ -727,6 +727,33 @@ etna_copy_resource(struct pipe_context *pctx, struct pipe_resource *dst,
 }
 
 void
+etna_copy_resource_box(struct pipe_context *pctx, struct pipe_resource *dst,
+                       struct pipe_resource *src, int level,
+                       struct pipe_box *box)
+{
+   assert(src->format == dst->format);
+   assert(src->array_size == dst->array_size);
+
+   struct pipe_blit_info blit = {};
+   blit.mask = util_format_get_mask(dst->format);
+   blit.filter = PIPE_TEX_FILTER_NEAREST;
+   blit.src.resource = src;
+   blit.src.format = src->format;
+   blit.src.box = *box;
+   blit.dst.resource = dst;
+   blit.dst.format = dst->format;
+   blit.dst.box = *box;
+
+   blit.dst.box.depth = blit.src.box.depth = 1;
+   blit.src.level = blit.dst.level = level;
+
+   for (int layer = 0; layer < dst->array_size; layer++) {
+      blit.src.box.z = blit.dst.box.z = layer;
+      pctx->blit(pctx, &blit);
+   }
+}
+
+void
 etna_clear_blit_init(struct pipe_context *pctx)
 {
    pctx->clear = etna_clear;
diff --git a/src/gallium/drivers/etnaviv/etnaviv_clear_blit.h b/src/gallium/drivers/etnaviv/etnaviv_clear_blit.h
index 73d07044b2b3..9bba6236b4db 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_clear_blit.h
+++ b/src/gallium/drivers/etnaviv/etnaviv_clear_blit.h
@@ -43,6 +43,11 @@ etna_copy_resource(struct pipe_context *pctx, struct pipe_resource *dst,
                    struct pipe_resource *src, int first_level, int last_level);
 
 void
+etna_copy_resource_box(struct pipe_context *pctx, struct pipe_resource *dst,
+                       struct pipe_resource *src, int level,
+                       struct pipe_box *box);
+
+void
 etna_clear_blit_init(struct pipe_context *pctx);
 
 #endif
-- 
2.11.0