r600: Only set context streamout strides info from the shader that has outputs

With 5d517a streamout info is only attached to the shader for which the
transform feedback is actually recorded, but the driver set the context info
with each state submitted, thereby always using the info data that was
attached to the vertex shader.

Pass the streamout stride info to the context only from the shader that
actually has outputs. (Thanks to Marek Olšák for pointing me in the right
direction)

Fixes regresion with: dEQP-GLES31.functional.tessellation.invariance.*
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108734
Fixes: 5d517a599b1eabd1d5696bf31e26f16568d35770
  st/mesa: Don't record garbage streamout information in the non-SSO case.

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/gallium/drivers/r600/r600_state_common.c b/src/gallium/drivers/r600/r600_state_common.c
index 2d365417872bf9b6cd3d193481ec40a0643e83a3..f886a27170deedbf434c0e38598eaff00e8b3462 100644 (file)
--- a/src/gallium/drivers/r600/r600_state_common.c
+++ b/src/gallium/drivers/r600/r600_state_common.c
@@ -1020,7 +1020,9 @@ static void r600_bind_vs_state(struct pipe_context *ctx, void *state)
 
        rctx->vs_shader = (struct r600_pipe_shader_selector *)state;
        r600_update_vs_writes_viewport_index(&rctx->b, r600_get_vs_info(rctx));
-       rctx->b.streamout.stride_in_dw = rctx->vs_shader->so.stride;
+
+        if (rctx->vs_shader->so.num_outputs)
+           rctx->b.streamout.stride_in_dw = rctx->vs_shader->so.stride;
 }
 
 static void r600_bind_gs_state(struct pipe_context *ctx, void *state)
@@ -1035,7 +1037,9 @@ static void r600_bind_gs_state(struct pipe_context *ctx, void *state)
 
        if (!state)
                return;
-       rctx->b.streamout.stride_in_dw = rctx->gs_shader->so.stride;
+
+        if (rctx->gs_shader->so.num_outputs)
+           rctx->b.streamout.stride_in_dw = rctx->gs_shader->so.stride;
 }
 
 static void r600_bind_tcs_state(struct pipe_context *ctx, void *state)
@@ -1057,7 +1061,9 @@ static void r600_bind_tes_state(struct pipe_context *ctx, void *state)
 
        if (!state)
                return;
-       rctx->b.streamout.stride_in_dw = rctx->tes_shader->so.stride;
+
+        if (rctx->tes_shader->so.num_outputs)
+           rctx->b.streamout.stride_in_dw = rctx->tes_shader->so.stride;
 }
 
 void r600_delete_shader_selector(struct pipe_context *ctx,