4 files changed, 20 insertions, 3 deletions
diff --git a/src/gallium/drivers/freedreno/a3xx/fd3_emit.c b/src/gallium/drivers/freedreno/a3xx/fd3_emit.c
index 365cb37fc59..00f1014444b 100644
--- a/src/gallium/drivers/freedreno/a3xx/fd3_emit.c
+++ b/src/gallium/drivers/freedreno/a3xx/fd3_emit.c
@@ -680,4 +680,6 @@ fd3_emit_restore(struct fd_context *ctx)
 
 	emit_cache_flush(ring);
 	fd_wfi(ctx, ring);
+
+	ctx->needs_rb_fbd = true;
 }
diff --git a/src/gallium/drivers/freedreno/a3xx/fd3_gmem.c b/src/gallium/drivers/freedreno/a3xx/fd3_gmem.c
index 72fe6f766f8..2d4763d8fad 100644
--- a/src/gallium/drivers/freedreno/a3xx/fd3_gmem.c
+++ b/src/gallium/drivers/freedreno/a3xx/fd3_gmem.c
@@ -839,9 +839,13 @@ fd3_emit_tile_prep(struct fd_context *ctx, struct fd_tile *tile)
 		OUT_RING(ring, 0x00000000);
 	}
 
-	OUT_PKT0(ring, REG_A3XX_RB_FRAME_BUFFER_DIMENSION, 1);
-	OUT_RING(ring, A3XX_RB_FRAME_BUFFER_DIMENSION_WIDTH(pfb->width) |
-			A3XX_RB_FRAME_BUFFER_DIMENSION_HEIGHT(pfb->height));
+	if (ctx->needs_rb_fbd) {
+		fd_wfi(ctx, ring);
+		OUT_PKT0(ring, REG_A3XX_RB_FRAME_BUFFER_DIMENSION, 1);
+		OUT_RING(ring, A3XX_RB_FRAME_BUFFER_DIMENSION_WIDTH(pfb->width) |
+				A3XX_RB_FRAME_BUFFER_DIMENSION_HEIGHT(pfb->height));
+		ctx->needs_rb_fbd = false;
+	}
 
 	OUT_PKT0(ring, REG_A3XX_RB_MODE_CONTROL, 1);
 	OUT_RING(ring, A3XX_RB_MODE_CONTROL_RENDER_MODE(RB_RENDERING_PASS) |
diff --git a/src/gallium/drivers/freedreno/freedreno_context.h b/src/gallium/drivers/freedreno/freedreno_context.h
index 7db1fd1fa0a..a50e6236903 100644
--- a/src/gallium/drivers/freedreno/freedreno_context.h
+++ b/src/gallium/drivers/freedreno/freedreno_context.h
@@ -170,6 +170,12 @@ struct fd_context {
 	 */
 	bool needs_wfi;
 
+	/* Do we need to re-emit RB_FRAME_BUFFER_DIMENSION?  At least on a3xx
+	 * it is not a banked context register, so it needs a WFI to update.
+	 * Keep track if it has actually changed, to avoid unneeded WFI.
+	 * */
+	bool needs_rb_fbd;
+
 	/* Keep track of DRAW initiators that need to be patched up depending
 	 * on whether we using binning or not:
 	 */
diff --git a/src/gallium/drivers/freedreno/freedreno_state.c b/src/gallium/drivers/freedreno/freedreno_state.c
index f5290a9af2a..93fbc3525ec 100644
--- a/src/gallium/drivers/freedreno/freedreno_state.c
+++ b/src/gallium/drivers/freedreno/freedreno_state.c
@@ -130,6 +130,11 @@ fd_set_framebuffer_state(struct pipe_context *pctx,
 		pipe_surface_reference(&cso->cbufs[i], NULL);
 
 	cso->nr_cbufs = framebuffer->nr_cbufs;
+
+	if ((cso->width != framebuffer->width) ||
+			(cso->height != framebuffer->height))
+		ctx->needs_rb_fbd = true;
+
 	cso->width = framebuffer->width;
 	cso->height = framebuffer->height;