The new intel_batchbuffer_emit_render_ring_prelude() hook will be called
when switching from BLT or UNKNOWN_RING to RENDER_RING. This provides a
place to emit state that should go at the start of each render ring
batch, with minimal overhead.
Signed-off-by: Kenneth Graunke <kenn...@whitecape.org>
Cc: Eric Anholt <e...@anholt.net>
Cc: Carl Worth <cwo...@cworth.org>
Cc: Juha-Pekka Heikkilä <juha-pekka.heikk...@intel.com>
---
src/mesa/drivers/dri/i965/intel_batchbuffer.c | 5 +++++
src/mesa/drivers/dri/i965/intel_batchbuffer.h | 5 +++++
2 files changed, 10 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/intel_batchbuffer.c
b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
index ab01c02..7598955 100644
--- a/src/mesa/drivers/dri/i965/intel_batchbuffer.c
+++ b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
@@ -179,6 +179,11 @@ do_batch_dump(struct brw_context *brw)
}
}
+void
+intel_batchbuffer_emit_render_ring_prelude(struct brw_context *brw)
+{
+}
+
/**
* Called when starting a new batch buffer.
*/
diff --git a/src/mesa/drivers/dri/i965/intel_batchbuffer.h
b/src/mesa/drivers/dri/i965/intel_batchbuffer.h
index 170211b..38149f3 100644
--- a/src/mesa/drivers/dri/i965/intel_batchbuffer.h
+++ b/src/mesa/drivers/dri/i965/intel_batchbuffer.h
@@ -24,6 +24,7 @@ extern "C" {
struct intel_batchbuffer;
+void intel_batchbuffer_emit_render_ring_prelude(struct brw_context *brw);
void intel_batchbuffer_init(struct brw_context *brw);
void intel_batchbuffer_free(struct brw_context *brw);
void intel_batchbuffer_save_state(struct brw_context *brw);
@@ -117,10 +118,14 @@ intel_batchbuffer_require_space(struct brw_context *brw,
GLuint sz,
if (intel_batchbuffer_space(brw) < sz)
intel_batchbuffer_flush(brw);
+ enum brw_gpu_ring prev_ring = brw->batch.ring;
/* The intel_batchbuffer_flush() calls above might have changed
* brw->batch.ring to UNKNOWN_RING, so we need to set it here at the end.
*/
brw->batch.ring = ring;
+
+ if (unlikely(prev_ring == UNKNOWN_RING && ring == RENDER_RING))
+ intel_batchbuffer_emit_render_ring_prelude(brw);
}
static INLINE void
--
1.8.3.2
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