drm/amdgpu/gfx10: fix programming of SC_HIZ_TILE_FIFO_SIZE field

max fifo size is 128 and PA_SC_FIFO_SIZE[20:15]=SC_HIZ_TILE_FIFO_SIZE
field is programmed in units of two entries, but 6 bits is insufficient
to hold value 128/2 = 64, so set this field as 0 which is interpreted by
the hardware as maximum physical fifo size(128).
Signed-off-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jack Xiao <Jack.Xiao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c

@@ -1103,7 +1103,7 @@ static void gfx_v10_0_gpu_early_init(struct amdgpu_device *adev)
 		adev->gfx.config.max_hw_contexts = 8;
 		adev->gfx.config.sc_prim_fifo_size_frontend = 0x20;
 		adev->gfx.config.sc_prim_fifo_size_backend = 0x100;
-		adev->gfx.config.sc_hiz_tile_fifo_size = 0x80;
+		adev->gfx.config.sc_hiz_tile_fifo_size = 0x0;
 		adev->gfx.config.sc_earlyz_tile_fifo_size = 0x4C0;
 		gb_addr_config = RREG32_SOC15(GC, 0, mmGB_ADDR_CONFIG);
 		break;