drm/client: Add drm_client_framebuffer_flush()

[linux-2.6-microblaze.git] / drivers / gpu / drm / drm_client.c

diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
index 536a227..495f47d 100644 (file)
--- a/drivers/gpu/drm/drm_client.c
+++ b/drivers/gpu/drm/drm_client.c
@@ -437,6 +437,39 @@ void drm_client_framebuffer_delete(struct drm_client_buffer *buffer)
 }
 EXPORT_SYMBOL(drm_client_framebuffer_delete);
 
+/**
+ * drm_client_framebuffer_flush - Manually flush client framebuffer
+ * @buffer: DRM client buffer (can be NULL)
+ * @rect: Damage rectangle (if NULL flushes all)
+ *
+ * This calls &drm_framebuffer_funcs->dirty (if present) to flush buffer changes
+ * for drivers that need it.
+ *
+ * Returns:
+ * Zero on success or negative error code on failure.
+ */
+int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect)
+{
+       if (!buffer || !buffer->fb || !buffer->fb->funcs->dirty)
+               return 0;
+
+       if (rect) {
+               struct drm_clip_rect clip = {
+                       .x1 = rect->x1,
+                       .y1 = rect->y1,
+                       .x2 = rect->x2,
+                       .y2 = rect->y2,
+               };
+
+               return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file,
+                                               0, 0, &clip, 1);
+       }
+
+       return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file,
+                                       0, 0, NULL, 0);
+}
+EXPORT_SYMBOL(drm_client_framebuffer_flush);
+
 #ifdef CONFIG_DEBUG_FS
 static int drm_client_debugfs_internal_clients(struct seq_file *m, void *data)
 {