STM32_CSI_PAD_SOURCE
csidev->pads[STM32_CSI_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
mbus_fmt = v4l2_subdev_state_get_format(state, STM32_CSI_PAD_SOURCE);
if (format->pad == STM32_CSI_PAD_SOURCE)
framefmt = v4l2_subdev_state_get_format(state, STM32_CSI_PAD_SOURCE);