radeonsi: catch a potential state tracker error with non-MSAA FBs

At least st/mesa ensures this, so I'd rather not handle deviations in radeonsi.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c
index ee92f153db01b2f263ffce45536d044083357e1d..df6b6103c63f7ce66f467d9585c57a21b53d8ce5 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -3193,6 +3193,12 @@ static void si_emit_sample_mask(struct si_context *sctx, struct r600_atom *atom)
        struct radeon_winsys_cs *cs = sctx->b.gfx.cs;
        unsigned mask = sctx->sample_mask.sample_mask;
 
+       /* Needed for line and polygon smoothing as well as for the Polaris
+        * small primitive filter. We expect the state tracker to take care of
+        * this for us.
+        */
+       assert(mask == 0xffff || sctx->framebuffer.nr_samples > 1);
+
        radeon_set_context_reg_seq(cs, R_028C38_PA_SC_AA_MASK_X0Y0_X1Y0, 2);
        radeon_emit(cs, mask | (mask << 16));
        radeon_emit(cs, mask | (mask << 16));