request_layer 845 drivers/media/platform/davinci/vpbe_display.c ret = osd_device->ops.request_layer(osd_device, request_layer 1161 drivers/media/platform/davinci/vpbe_display.c err = osd_device->ops.request_layer(osd_device, request_layer 1520 drivers/media/platform/davinci/vpbe_osd.c .request_layer = osd_request_layer, request_layer 318 include/media/davinci/vpbe_osd.h int (*request_layer)(struct osd_state *sd, enum osd_layer layer);