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  1. 29 Jan, 2020 2 commits
  3. 28 Jan, 2020 1 commit
    • Mohan Kumar's avatar
      ALSA: hda: Reset stream if DMA RUN bit not cleared · 7faa26c1
      Mohan Kumar authored 
      Tegra HDA has FIFO size which can hold upto 10 audio frames to support
DVFS. When HDA DMA RUN bit is set to 0 to stop the stream, the DMA RUN
bit will be cleared to 0 only after transferring all the remaining audio
frames queued up in the fifo. This is not in sync with spec which states
the controller will stop transmitting(output) in the beginning of the
next frame for the relevant stream.

The above behavior with Tegra HDA was resulting in machine check error
during the system suspend flow with active audio playback with below kernel
error logs.
[ 33.524583] mc-err: [mcerr] (hda) csr_hdar: EMEM address decode error
[ 33.531088] mc-err: [mcerr] status = 0x20000015; addr = 0x00000000
[ 33.537431] mc-err: [mcerr] secure: no, access-type: read, SMMU fault: none

This was due to the fifo has more than one audio frame when the DMA
RUN bit is set to 0 during system suspend flow and the timeout handling in
snd_hdac_stream_sync() was not designed to handle this scenario. So the
DMA will continue running even after timeout hit until all remaining
audio frames in the fifo are transferred, but the suspend flow will try
to reset the controller and turn off the hda clocks without the knowledge
of the DMA is still running and could result in mc-err.

The above issue can be resolved by doing stream reset with the help of
snd_hdac_stream_reset() which would ensure the DMA RUN bit is cleared
if the timeout was hit in snd_hdac_stream_sync().
Signed-off-by: default avatarMohan Kumar <mkumard@nvidia.com>
Link: https://lore.kernel.org/r/20200128051508.26064-1-mkumard@nvidia.comSigned-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      7faa26c1
  5. 27 Jan, 2020 1 commit
    • Takashi Iwai's avatar
      Merge tag 'asoc-v5.6' of... · 90fb04f8
      Takashi Iwai authored 
      Merge tag 'asoc-v5.6' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Updates for v5.6

A pretty big release this time around, a lot of new drivers and both
Morimoto-san and Takashi were doing subsystem wide updates as well:

 - Further big refactorings from Morimoto-san simplifying the core
   interfaces and moving things to the component level.
 - Transition of drivers to managed buffer allocation and removal of
   redundant PCM ioctls.
 - New driver support for Ingenic JZ4770, Mediatek MT6660, Qualcomm
   WCD934x and WSA881x, and Realtek RT700, RT711, RT715, RT1011, RT1015
   and RT1308.
      90fb04f8
  7. 26 Jan, 2020 3 commits
  9. 23 Jan, 2020 15 commits
  11. 22 Jan, 2020 1 commit
  13. 21 Jan, 2020 17 commits
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