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    SubjectRe: [alsa-devel] [PATCH v3 00/15] ASoC: OMAP: Convert to use dmaengine
    Hi Peter, Mark,

    On 09/14/2012 07:05 AM, Peter Ujfalusi wrote:
    > Hello,
    > Changes since v2:
    > - As it has been discussed the no_wakeup parameter has been replaced with flags
    > for the dmaengine APIs
    > Changes since v1:
    > - Support for pause/resume for OMAP audio via dmaengine
    > - dmaengine: support for NO_PERIOD_WAKEUP in cyclic mode
    > - OMAP to keep supporting NO_PERIOD_WAKEUP for audio
    > - Other plaforms can also try to enable this mode since we have now generic
    > interface to do so.
    > This series will switch the OMAP audio to use dmaengine.
    > The final patch which does the switch was based on Russell King's earlier patch.
    > The first 10 patch is to prepare the OMAP audio drivers for a smooth change to
    > dmaengine:
    > - sDMA FRAME sync mode is removed and replaced with PACKET mode
    > - dai drivers no longer need to configure sDMA sync mode
    > - dai drivers does not need to specify the DMA word length - with the exception
    > of the omap-hdmi driver which requires 32bit word length regardless of the
    > audio format in use
    > - the McPDM driver used (to my surprise) hackish way of getting the DMA channel
    > and address - via defines from some header files
    > After the conversion OMAP audio support should have the same features as before,
    > no regressions expected.
    > I have tested the series on:
    > - BeagleBoard (audio via McBSP):
    > - aplay/arecord. In element mode and in threshold mode with different period
    > sizes
    > - mplayer -ao alsa: for direct ALSA access
    > - mplayer -ao pulse: via PulseAudio to test NO_PERIOD_WAKEUP feature
    > - OMAP4 Blaze (audio via McPDM and DMIC)
    > - aplay/arecord
    > - mplayer -ao alsa: for direct ALSA access
    > - mplayer -ao pulse: via PulseAudio to test NO_PERIOD_WAKEUP feature
    > The patches has been generated against:
    > git:// for-3.7
    > Janusz: Can you retest this series on OMAP1 to be sure I have not broken it?
    > Ricardo: Can you test the omap-hmdi if it is still working?

    I tested these changes from Mark's for-3.7 branch. HDMI audio is working
    fine after applying patch 03. Such patch is missing in Mark's branch and
    this causes a build break with omap2plus_defconfig. Not sure if this is
    expected, Most likely not.

    Tested-by: Ricardo Neri <>


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