• Lars-Peter Clausen's avatar
    ASoC: dmaengine_pcm: Make FLAG_NO_RESIDUE internal · acde50a7
    Lars-Peter Clausen authored
    Whether residue can be reported or not is not a property of the audio
    controller but of the DMA controller. The FLAG_NO_RESIDUE was initially
    added when the DMAengine framework had no support for describing the residue
    reporting capabilities of the controller. Support for this was added quite a
    while ago and recently the DMAengine framework started to complain if a
    driver does not describe its capabilities and a lot of patches have been
    merged that add support for this where it was missing. So it should be safe
    to assume that driver on actively used platforms properly implement the DMA
    capabilities API.
    
    This patch makes the FLAG_NO_RESIDUE internal and no longer allows audio
    controller drivers to manually set the flag. If a DMA driver against
    expectations does not support reporting its capabilities for now the generic
    DMAengine PCM driver will now emit a warning and simply assume that residue
    reporting is not supported. In the future this might be changed to aborting
    with an error.
    Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
    Signed-off-by: default avatarMark Brown <broonie@kernel.org>
    acde50a7
atmel-pcm-dma.c 4.26 KB