freedreno/a6xx: add infrastructure for CP_DRAW_STATE

Add helper to add state-groups to emit, and code to emit CP_DRAW_STATE
packet if we have any state-groups.

Signed-off-by: Rob Clark <[email protected]>

2 files changed, 46 insertions, 0 deletions

diff --git a/src/gallium/drivers/freedreno/a6xx/fd6_emit.c b/src/gallium/drivers/freedreno/a6xx/fd6_emit.c
index 45bb5250ec8..fc4a53f8651 100644
--- a/src/gallium/drivers/freedreno/a6xx/fd6_emit.c
+++ b/src/gallium/drivers/freedreno/a6xx/fd6_emit.c
@@ -940,6 +940,22 @@ fd6_emit_state(struct fd_context *ctx, struct fd_ringbuffer *ring,
 
 	if (ctx->dirty_shader[PIPE_SHADER_FRAGMENT] & FD_DIRTY_SHADER_IMAGE)
 		fd6_emit_images(ctx, ring, PIPE_SHADER_FRAGMENT);
+
+	if (emit->num_groups > 0) {
+		OUT_PKT7(ring, CP_SET_DRAW_STATE, 3 * emit->num_groups);
+		for (unsigned i = 0; i < emit->num_groups; i++) {
+			struct fd6_state_group *g = &emit->groups[i];
+			unsigned n = fd_ringbuffer_size(g->stateobj) / 4;
+
+			OUT_RING(ring, CP_SET_DRAW_STATE__0_COUNT(n) |
+					CP_SET_DRAW_STATE__0_ENABLE_MASK(g->enable_mask) |
+					CP_SET_DRAW_STATE__0_GROUP_ID(g->group_id));
+			OUT_RB(ring, g->stateobj);
+
+			fd_ringbuffer_del(g->stateobj);
+		}
+		emit->num_groups = 0;
+	}
 }
 
 void
diff --git a/src/gallium/drivers/freedreno/a6xx/fd6_emit.h b/src/gallium/drivers/freedreno/a6xx/fd6_emit.h
index 4ebb5987423..a2117a1b244 100644
--- a/src/gallium/drivers/freedreno/a6xx/fd6_emit.h
+++ b/src/gallium/drivers/freedreno/a6xx/fd6_emit.h
@@ -38,6 +38,20 @@
 
 struct fd_ringbuffer;
 
+/* To collect all the state objects to emit in a single CP_SET_DRAW_STATE
+ * packet, the emit tracks a collection of however many state_group's that
+ * need to be emit'd.
+ */
+enum fd6_state_id {
+	FD6_GROUP_CONST,
+};
+
+struct fd6_state_group {
+	struct fd_ringbuffer *stateobj;
+	enum fd6_state_id group_id;
+	uint8_t enable_mask;
+};
+
 /* grouped together emit-state for prog/vertex/state emit: */
 struct fd6_emit {
 	struct pipe_debug_callback *debug;
@@ -63,6 +77,9 @@ struct fd6_emit {
 	/* TODO: other shader stages.. */
 
 	unsigned streamout_mask;
+
+	struct fd6_state_group groups[32];
+	unsigned num_groups;
 };
 
 static inline const struct ir3_shader_variant *
@@ -92,6 +109,19 @@ fd6_emit_get_fp(struct fd6_emit *emit)
 }
 
 static inline void
+fd6_emit_add_group(struct fd6_emit *emit, struct fd_ringbuffer *stateobj,
+		enum fd6_state_id group_id, unsigned enable_mask)
+{
+	debug_assert(emit->num_groups < ARRAY_SIZE(emit->groups));
+	if (fd_ringbuffer_size(stateobj) == 0)
+		return;
+	struct fd6_state_group *g = &emit->groups[emit->num_groups++];
+	g->stateobj = stateobj;
+	g->group_id = group_id;
+	g->enable_mask = enable_mask;
+}
+
+static inline void
 fd6_event_write(struct fd_batch *batch, struct fd_ringbuffer *ring,
 		enum vgt_event_type evt, bool timestamp)
 {