radv: Enable command buffer chaining by default.

For approx 5-10% performance improvement in dota2.

Reviewed-by: Dave Airlie <airlied@redhat.com>

src/amd/vulkan/radv_debug.h

@@ -41,7 +41,7 @@ enum {
 };
 
 enum {
-	RADV_PERFTEST_BATCHCHAIN     =   0x1,
+	RADV_PERFTEST_NO_BATCHCHAIN  =   0x1,
 	RADV_PERFTEST_SISCHED        =   0x2,
 };
 

src/amd/vulkan/radv_device.c

@@ -414,7 +414,7 @@ static const struct debug_control radv_debug_options[] = {
 };
 
 static const struct debug_control radv_perftest_options[] = {
-	{"batchchain", RADV_PERFTEST_BATCHCHAIN},
+	{"nobatchchain", RADV_PERFTEST_NO_BATCHCHAIN},
 	{"sisched", RADV_PERFTEST_SISCHED},
 	{NULL, 0}
 };

src/amd/vulkan/winsys/amdgpu/radv_amdgpu_winsys.c

@@ -111,7 +111,7 @@ radv_amdgpu_winsys_create(int fd, uint64_t debug_flags, uint64_t perftest_flags)
 	if (debug_flags & RADV_DEBUG_NO_IBS)
 		ws->use_ib_bos = false;
 
-	ws->batchchain = !!(perftest_flags & RADV_PERFTEST_BATCHCHAIN);
+	ws->batchchain = !(perftest_flags & RADV_PERFTEST_NO_BATCHCHAIN);
 	LIST_INITHEAD(&ws->global_bo_list);
 	pthread_mutex_init(&ws->global_bo_list_lock, NULL);
 	ws->base.query_info = radv_amdgpu_winsys_query_info;