On 08/17/2012 12:38 AM, Laxman Dewangan wrote:
On Thursday 16 August 2012 11:23 PM, Stephen Warren wrote:
On 08/16/2012 08:13 AM, Laxman Dewangan wrote:
Enable config for dmaengine based Tegra APB DMA driver and disable the legacy APB DMA driver (SYSTEM_DMA).
Laxman, if I apply this series to next-20120816 (plus a few patches in my local work branch plus the CPU hotplug patches from Joseph, although I suspect none of that matters), then audio playback on Tegra20 is broken; the pitch is far too high. Audio playback on Tegra30 works as expected.
I run the test again on ventana and did not see any issue. I play one song and saw similar behavior with/without this series.
OK, I'll test some other boards. I tested Whistler, although all the clocking logic is identical between all Tegra20 boards.
With this series:
ubuntu@tegra-ubuntu:/home$ aplay "1-04 Hungry Like The Wolf.wav" Playing WAVE '1-04 Hungry Like The Wolf.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo underrun!!! (at least 5039.388 ms long)
Why are you getting all these underruns? I almost never see this, except when something else is hammering the SD card containing the .wav file. If I saw those, I'd count it as a test failure.