radeonsi: Don't offset OFFCHIP_BUFFERING on pre-VI cards.

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96239
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c b/src/gallium/drivers/radeonsi/si_state_shaders.c
index 8ec0470..a7af76d 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_state_shaders.c
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.c
@@ -1819,12 +1819,16 @@ static void si_init_tess_factor_ring(struct si_context *sctx)
 
        /* Append these registers to the init config state. */
        if (sctx->b.chip_class >= CIK) {
+               unsigned offchip_buffering = offchip_blocks;
+               if(sctx->b.chip_class >= VI)
+                       --offchip_buffering;
+
                si_pm4_set_reg(sctx->init_config, R_030938_VGT_TF_RING_SIZE,
                               S_030938_SIZE(sctx->tf_ring->width0 / 4));
                si_pm4_set_reg(sctx->init_config, R_030940_VGT_TF_MEMORY_BASE,
                               r600_resource(sctx->tf_ring)->gpu_address >> 8);
                si_pm4_set_reg(sctx->init_config, R_03093C_VGT_HS_OFFCHIP_PARAM,
-                            S_03093C_OFFCHIP_BUFFERING(offchip_blocks - 1) |
+                            S_03093C_OFFCHIP_BUFFERING(offchip_buffering) |
                             S_03093C_OFFCHIP_GRANULARITY(V_03093C_X_8K_DWORDS));
        } else {
                si_pm4_set_reg(sctx->init_config, R_008988_VGT_TF_RING_SIZE,
@@ -1832,7 +1836,7 @@ static void si_init_tess_factor_ring(struct si_context *sctx)
                si_pm4_set_reg(sctx->init_config, R_0089B8_VGT_TF_MEMORY_BASE,
                               r600_resource(sctx->tf_ring)->gpu_address >> 8);
                si_pm4_set_reg(sctx->init_config, R_0089B0_VGT_HS_OFFCHIP_PARAM,
-                              S_0089B0_OFFCHIP_BUFFERING(offchip_blocks - 1));
+                              S_0089B0_OFFCHIP_BUFFERING(offchip_blocks));
        }
 
        /* Flush the context to re-emit the init_config state.