gallium: use PIPE_CAP_CONSTBUF0_FLAGS

src/gallium/auxiliary/util/u_inlines.h

@@ -284,6 +284,27 @@ pipe_buffer_create( struct pipe_screen *screen,
 }
 
 
+static inline struct pipe_resource *
+pipe_buffer_create_const0(struct pipe_screen *screen,
+                          unsigned bind,
+                          enum pipe_resource_usage usage,
+                          unsigned size)
+{
+   struct pipe_resource buffer;
+   memset(&buffer, 0, sizeof buffer);
+   buffer.target = PIPE_BUFFER;
+   buffer.format = PIPE_FORMAT_R8_UNORM;
+   buffer.bind = bind;
+   buffer.usage = usage;
+   buffer.flags = screen->get_param(screen, PIPE_CAP_CONSTBUF0_FLAGS);
+   buffer.width0 = size;
+   buffer.height0 = 1;
+   buffer.depth0 = 1;
+   buffer.array_size = 1;
+   return screen->resource_create(screen, &buffer);
+}
+
+
 /**
  * Map a range of a resource.
  * \param offset  start of region, in bytes 

src/gallium/auxiliary/vl/vl_compositor.c

@@ -1437,7 +1437,7 @@ vl_compositor_init_state(struct vl_compositor_state *s, struct pipe_context *pip
     * Const buffer contains the color conversion matrix and bias vectors
     */
    /* XXX: Create with IMMUTABLE/STATIC... although it does change every once in a long while... */
-   s->csc_matrix = pipe_buffer_create
+   s->csc_matrix = pipe_buffer_create_const0
    (
       pipe->screen,
       PIPE_BIND_CONSTANT_BUFFER,

src/gallium/drivers/radeonsi/si_pipe.c

@@ -587,7 +587,7 @@ static void si_test_vmfault(struct si_screen *sscreen)
 	struct pipe_context *ctx = sscreen->aux_context;
 	struct si_context *sctx = (struct si_context *)ctx;
 	struct pipe_resource *buf =
-		pipe_buffer_create(&sscreen->b, 0, PIPE_USAGE_DEFAULT, 64);
+		pipe_buffer_create_const0(&sscreen->b, 0, PIPE_USAGE_DEFAULT, 64);
 
 	if (!buf) {
 		puts("Buffer allocation failed.");

src/gallium/state_trackers/xa/xa_renderer.c

@@ -393,9 +393,10 @@ renderer_set_constants(struct xa_context *r,
 	&r->fs_const_buffer;
 
     pipe_resource_reference(cbuf, NULL);
-    *cbuf = pipe_buffer_create(r->pipe->screen,
-			       PIPE_BIND_CONSTANT_BUFFER, PIPE_USAGE_DEFAULT,
-			       param_bytes);
+    *cbuf = pipe_buffer_create_const0(r->pipe->screen,
+                                      PIPE_BIND_CONSTANT_BUFFER,
+                                      PIPE_USAGE_DEFAULT,
+                                      param_bytes);
 
     if (*cbuf) {
 	pipe_buffer_write(r->pipe, *cbuf, 0, param_bytes, params);