radv: Specify semantics of HTILE layout helpers.

And correct implementation to specify only what we support.

Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>

src/amd/vulkan/radv_cmd_buffer.c

@@ -1104,6 +1104,10 @@ radv_emit_framebuffer_state(struct radv_cmd_buffer *cmd_buffer)
 		struct radv_image *image = att->attachment->image;
 		cmd_buffer->device->ws->cs_add_buffer(cmd_buffer->cs, att->attachment->bo, 8);
 
+		/* We currently don't support writing decompressed HTILE */
+		assert(radv_layout_has_htile(image, layout) ==
+		       radv_layout_is_htile_compressed(image, layout));
+
 		radv_emit_fb_ds_state(cmd_buffer, &att->ds, image, layout);
 
 		if (att->ds.offset_scale != cmd_buffer->state.offset_scale) {

src/amd/vulkan/radv_image.c

@@ -773,14 +773,17 @@ radv_image_view_init(struct radv_image_view *iview,
 bool radv_layout_has_htile(const struct radv_image *image,
                            VkImageLayout layout)
 {
-	return (layout == VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL ||
+	return image->surface.htile_size &&
-		layout == VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
+	       (layout == VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL ||
+	        layout == VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
 }
 
 bool radv_layout_is_htile_compressed(const struct radv_image *image,
                                      VkImageLayout layout)
 {
-	return layout == VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
+	return image->surface.htile_size &&
+	       (layout == VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL ||
+	        layout == VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
 }
 
 bool radv_layout_can_fast_clear(const struct radv_image *image,

src/amd/vulkan/radv_private.h

@@ -1186,10 +1186,20 @@ struct radv_image {
 	uint32_t clear_value_offset;
 };
 
+/* Whether the image has a htile that is known consistent with the contents of
+ * the image. */
 bool radv_layout_has_htile(const struct radv_image *image,
                            VkImageLayout layout);
+
+/* Whether the image has a htile  that is known consistent with the contents of
+ * the image and is allowed to be in compressed form.
+ *
+ * If this is false reads that don't use the htile should be able to return
+ * correct results.
+ */
 bool radv_layout_is_htile_compressed(const struct radv_image *image,
                                      VkImageLayout layout);
+
 bool radv_layout_can_fast_clear(const struct radv_image *image,
 			        VkImageLayout layout,
 			        unsigned queue_mask);