• yitian's avatar
    ASoC: dwc: fix dma stop transferring issue · 924eb475
    yitian authored
    Designware I2S uses tx empty and rx available signals as the DMA
    handshaking signals. during music playing, if XRUN occurs,
    i2s_stop() function will be executed and both tx and rx irq are
    masked, when music continues to be played, i2s_start() is executed
    but both tx and rx irq are not unmasked which cause I2S stop
    sending DMA handshaking signal to DMA controller, and it finally
    causes music playing will be stopped once XRUN occurs for the first
    time.
    
    [On list discussion suggests this may be partly a race condition on slow
    systems -- broonie]
    Signed-off-by: default avatarYitian Bu <yitian.bu@tangramtek.com>
    Signed-off-by: default avatarMark Brown <broonie@kernel.org>
    924eb475
designware_i2s.c 16.4 KB