Add amdgpu support for arm SoC

Change-Id: Ic95c8514271d246dd668631810e8dee210f7f1b4
Signed-off-by: Yanghaku <[email protected]>

Author: yanghaku

drivers/gpu/drm/ttm/ttm_bo_util.c

@@ -348,8 +348,6 @@ static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
 		.no_wait_gpu = false
 	};
 	struct ttm_tt *ttm = bo->ttm;
-	struct ttm_resource_manager *man =
-			ttm_manager_type(bo->bdev, bo->resource->mem_type);
 	pgprot_t prot;
 	int ret;
 
@@ -359,17 +357,7 @@ static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
 	if (ret)
 		return ret;
 
-	if (num_pages == 1 && ttm->caching == ttm_cached &&
-	    !(man->use_tt && (ttm->page_flags & TTM_TT_FLAG_DECRYPTED))) {
-		/*
-		 * We're mapping a single page, and the desired
-		 * page protection is consistent with the bo.
-		 */
-
-		map->bo_kmap_type = ttm_bo_map_kmap;
-		map->page = ttm->pages[start_page];
-		map->virtual = kmap(map->page);
-	} else {
+	{
 		/*
 		 * We need to use vmap to get the desired page protection
 		 * or to make the buffer object look contiguous.

drivers/gpu/drm/ttm/ttm_module.c

@@ -63,7 +63,12 @@ pgprot_t ttm_prot_from_caching(enum ttm_caching caching, pgprot_t tmp)
 {
 	/* Cached mappings need no adjustment */
 	if (caching == ttm_cached)
+	{
+#ifdef CONFIG_ARM64
+		return pgprot_dmacoherent(tmp);
+#endif
 		return tmp;
+	}
 
 #if defined(__i386__) || defined(__x86_64__)
 	if (caching == ttm_write_combined)