radeonsi: use the DISPATCH packets to force COMPUTE_START_X/Y/Z = 0

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

diff --git a/src/gallium/drivers/radeonsi/si_compute.c b/src/gallium/drivers/radeonsi/si_compute.c
index 65f3261e0a1765d8b5b0af87ccbd265eae7f127f..91a6a406c6f178b86e57ce27cad4bbdb5106ef22 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_compute.c
+++ b/src/gallium/drivers/radeonsi/si_compute.c
@@ -265,11 +265,6 @@ static void si_initialize_compute(struct si_context *sctx)
        struct radeon_winsys_cs *cs = sctx->b.gfx.cs;
        uint64_t bc_va;
 
-       radeon_set_sh_reg_seq(cs, R_00B810_COMPUTE_START_X, 3);
-       radeon_emit(cs, 0);
-       radeon_emit(cs, 0);
-       radeon_emit(cs, 0);
-
        radeon_set_sh_reg_seq(cs, R_00B858_COMPUTE_STATIC_THREAD_MGMT_SE0, 2);
        /* R_00B858_COMPUTE_STATIC_THREAD_MGMT_SE0 / SE1 */
        radeon_emit(cs, S_00B858_SH0_CU_EN(0xffff) | S_00B858_SH1_CU_EN(0xffff));
@@ -723,6 +718,10 @@ static void si_emit_dispatch_packets(struct si_context *sctx,
        radeon_emit(cs, S_00B820_NUM_THREAD_FULL(info->block[1]));
        radeon_emit(cs, S_00B824_NUM_THREAD_FULL(info->block[2]));
 
+       unsigned dispatch_initiator =
+               S_00B800_COMPUTE_SHADER_EN(1) |
+               S_00B800_FORCE_START_AT_000(1);
+
        if (info->indirect) {
                uint64_t base_va = r600_resource(info->indirect)->gpu_address;
 
@@ -739,14 +738,14 @@ static void si_emit_dispatch_packets(struct si_context *sctx,
                radeon_emit(cs, PKT3(PKT3_DISPATCH_INDIRECT, 1, render_cond_bit) |
                                PKT3_SHADER_TYPE_S(1));
                radeon_emit(cs, info->indirect_offset);
-               radeon_emit(cs, 1);
+               radeon_emit(cs, dispatch_initiator);
        } else {
                radeon_emit(cs, PKT3(PKT3_DISPATCH_DIRECT, 3, render_cond_bit) |
                                PKT3_SHADER_TYPE_S(1));
                radeon_emit(cs, info->grid[0]);
                radeon_emit(cs, info->grid[1]);
                radeon_emit(cs, info->grid[2]);
-               radeon_emit(cs, 1);
+               radeon_emit(cs, dispatch_initiator);
        }
 }