Stolen from VC4. As we don't do any fancy reallocation tricks yet, it's
possible to upgrade also coherent mappings and shared resources.
Signed-off-by: Lucas Stach <l.st...@pengutronix.de>
---
src/gallium/drivers/etnaviv/etnaviv_transfer.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/src/gallium/drivers/etnaviv/etnaviv_transfer.c
b/src/gallium/drivers/etnaviv/etnaviv_transfer.c
index 05cdbc599956..fe57aa4d17b2 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_transfer.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_transfer.c
@@ -148,6 +148,20 @@ etna_transfer_map(struct pipe_context *pctx, struct
pipe_resource *prsc,
assert(level <= prsc->last_level);
+ /* Upgrade DISCARD_RANGE to WHOLE_RESOURCE if the whole resource is
+ * being mapped. If we add buffer reallocation to avoid CPU/GPU sync this
+ * check needs to be extended to coherent mappings and shared resources.
+ */
+ if ((usage & PIPE_TRANSFER_DISCARD_RANGE) &&
+ !(usage & PIPE_TRANSFER_UNSYNCHRONIZED) &&
+ prsc->last_level == 0 &&
+ prsc->width0 == box->width &&
+ prsc->height0 == box->height &&
+ prsc->depth0 == box->depth &&
+ prsc->array_size == 1) {
+ usage |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
+ }
+
if (rsc->texture && !etna_resource_newer(rsc, etna_resource(rsc->texture)))
{
/* We have a texture resource which is the same age or newer than the
* render resource. Use the texture resource, which avoids bouncing
--
2.11.0
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