[pulseaudio-tickets] [Bug 84585] Issue of CPU usage with HiFiBerry driver snd_soc_hifiberry_amp with Debian Wheezy kernel 3.12.28

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84585

--- Comment #14 from HiFiBerry <info at hifiberry.com> ---
@Raymond: No idea about DMA residue. As far as I know, the Raspberry Pi I2S
driver directly access the DMA controller. The code for this can be found here:
https://github.com/raspberrypi/linux/blob/rpi-3.12.y/sound/soc/bcm/bcm2708-i2s.c

It seems, that there was some work on the DMA driver itself:
https://github.com/raspberrypi/linux/blob/rpi-3.12.y/arch/arm/mach-bcm2708/dma.c

Best regards
Daniel

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