radeonsi: set the smallest possible CB_TARGET_MASK

better safe than sorry; set_framebuffer_state always makes this dirty

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c
index b4683c5..3e8e0c8 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -94,13 +94,13 @@ static void si_emit_cb_render_state(struct si_context *sctx, struct r600_atom *a
 {
        struct radeon_winsys_cs *cs = sctx->b.gfx.cs;
        struct si_state_blend *blend = sctx->queued.named.blend;
-       uint32_t cb_target_mask, i;
+       /* CB_COLORn_INFO.FORMAT=INVALID should disable unbound colorbuffers,
+        * but you never know. */
+       uint32_t cb_target_mask = sctx->framebuffer.colorbuf_enabled_4bit;
+       unsigned i;
 
-       /* CB_COLORn_INFO.FORMAT=INVALID disables empty colorbuffer slots. */
        if (blend)
-               cb_target_mask = blend->cb_target_mask;
-       else
-               cb_target_mask = 0xffffffff;
+               cb_target_mask &= blend->cb_target_mask;
 
        /* Avoid a hang that happens when dual source blending is enabled
         * but there is not enough color outputs. This is undefined behavior,