+static int ipp_validate_mem_node(struct drm_device *drm_dev,
+ struct drm_exynos_ipp_mem_node *m_node,
+ struct drm_exynos_ipp_cmd_node *c_node)
+{
+ struct drm_exynos_ipp_config *ipp_cfg;
+ unsigned int num_plane;
+ unsigned long min_size, size;
+ unsigned int bpp;
+ int i;
+
+ /* The property id should already be varified */
+ ipp_cfg = &c_node->property.config[m_node->prop_id];
+ num_plane = drm_format_num_planes(ipp_cfg->fmt);
+
+ /**
+ * This is a rather simplified validation of a memory node.
+ * It basically verifies provided gem object handles
+ * and the buffer sizes with respect to current configuration.
+ * This is not the best that can be done
+ * but it seems more than enough
+ */
+ for (i = 0; i < num_plane; ++i) {
+ if (!m_node->buf_info.handles[i]) {
+ DRM_ERROR("invalid handle for plane %d\n", i);
+ return -EINVAL;
+ }
+ bpp = drm_format_plane_cpp(ipp_cfg->fmt, i);
+ min_size = (ipp_cfg->sz.hsize * ipp_cfg->sz.vsize * bpp) >> 3;
+ size = exynos_drm_gem_get_size(drm_dev,
+ m_node->buf_info.handles[i],
+ c_node->filp);
+ if (min_size > size) {
+ DRM_ERROR("invalid size for plane %d\n", i);
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+