radeonsi/gfx9: set VGT_REUSE_OFF = 0

same as Vulkan

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 938e7fb..e967b4b 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -717,9 +717,11 @@ static void si_emit_clip_regs(struct si_context *sctx, struct r600_atom *atom)
                ucp_mask |
                S_028810_CLIP_DISABLE(window_space));
 
-       /* reuse needs to be set off if we write oViewport */
-       radeon_set_context_reg(cs, R_028AB4_VGT_REUSE_OFF,
-                              S_028AB4_REUSE_OFF(info->writes_viewport_index));
+       if (sctx->b.chip_class <= VI) {
+               /* reuse needs to be set off if we write oViewport */
+               radeon_set_context_reg(cs, R_028AB4_VGT_REUSE_OFF,
+                                      S_028AB4_REUSE_OFF(info->writes_viewport_index));
+       }
 }
 
 /*
@@ -4342,6 +4344,8 @@ static void si_init_config(struct si_context *sctx)
 
        si_pm4_set_reg(pm4, R_028B98_VGT_STRMOUT_BUFFER_CONFIG, 0x0);
        si_pm4_set_reg(pm4, R_028AA0_VGT_INSTANCE_STEP_RATE_0, 1);
+       if (sctx->b.chip_class >= GFX9)
+               si_pm4_set_reg(pm4, R_028AB4_VGT_REUSE_OFF, 0);
        si_pm4_set_reg(pm4, R_028AB8_VGT_VTX_CNT_EN, 0x0);
        if (sctx->b.chip_class < CIK)
                si_pm4_set_reg(pm4, R_008A14_PA_CL_ENHANCE, S_008A14_NUM_CLIP_SEQ(3) |