[Mesa-dev] [PATCH 08/20] radeonsi: assume that a VS without POSITION is LS

[Marek Olšák]

From: Marek Olšák <marek.ol...@amd.com>

---
 src/gallium/drivers/radeonsi/si_state_shaders.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c 
b/src/gallium/drivers/radeonsi/si_state_shaders.c
index 9e95fea..d0869e3 100644
--- a/src/gallium/drivers/radeonsi/si_state_shaders.c
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.c
@@ -1117,20 +1117,27 @@ static void si_parse_next_shader_property(const struct 
tgsi_shader_info *info,
        switch (info->processor) {
        case PIPE_SHADER_VERTEX:
                switch (next_shader) {
                case PIPE_SHADER_GEOMETRY:
                        key->vs.as_es = 1;
                        break;
                case PIPE_SHADER_TESS_CTRL:
                case PIPE_SHADER_TESS_EVAL:
                        key->vs.as_ls = 1;
                        break;
+               default:
+                       /* If POSITION isn't written, it can't be a HW VS.
+                        * Assume that it's a HW LS. (the next shader is TCS)
+                        * This heuristic is needed for separate shader objects.
+                        */
+                       if (!info->writes_position)
+                               key->as_ls = 1;
                }
                break;
 
        case PIPE_SHADER_TESS_EVAL:
                if (next_shader == PIPE_SHADER_GEOMETRY)
                        key->tes.as_es = 1;
                break;
        }
 }
 
-- 
2.7.4

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