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  1. 24 11月, 2013 1 次提交
    • N
      ASoC: soc-pcm: add symmetry for channels and sample bits · 3635bf09
      由 Nicolin Chen 提交于 
      Some SoCs can only work in mono or stereo mode at one time. So if
we let them capture a mono stream while playing a stereo stream,
there might be a problem occur to one of these two streams: double
paced or slowed down.

In soc-pcm.c, we have soc_pcm_apply_symmetry() to apply the rate
symmetry. But we don't have one for channels.

Likewise, we can treat symmetric_rate as a solution for those SoCs
or CODECs which can not handle asymmetrical LRCLK. But it's also
impossible for them to handle asymmetrical BCLK. And accodring to
BCLK = LRCLK * channel number * slot size(fixed or sample bits),
sample bits might also be a problem if they are not using a fixed
slot size.

Thus, this patch applys symmetry for channels and sample bits.

Meanwhile, there might be a race between two substreams if starting
simultaneously. Previously, we only added warning to compalin but
still using conservative way to let it carry on. However, this patch
rejects the second stream with any unmatched parameter to make sure
the first existing stream won't be broken.
Signed-off-by: NNicolin Chen <b42378@freescale.com>
Signed-off-by: NMark Brown <broonie@linaro.org>
      3635bf09
  3. 20 11月, 2013 5 次提交
  5. 18 11月, 2013 1 次提交
  7. 15 11月, 2013 3 次提交
  9. 14 11月, 2013 2 次提交
    • O
      ASoC: fsl: imx-pcm-fiq: omit fiq counter to avoid harm in unbalanced situations · fc7dc61d
      由 Oskar Schirmer 提交于 
      Unbalanced calls to snd_imx_pcm_trigger() may result in endless
FIQ activity and thus provoke eternal sound. While on the first glance,
the switch statement looks pretty symmetric, the SUSPEND/RESUME
pair is not: the suspend case comes along snd_pcm_suspend_all(),
which for fsl/imx-pcm-fiq is called only at snd_soc_suspend(),
but the resume case originates straight from the SNDRV_PCM_IOCTL_RESUME.
This way userland may provoke an unbalanced resume, which might cause
the fiq_enable counter to increase and never return to zero again,
so eventually imx_pcm_fiq is never disabled.

Simply removing the fiq_enable will solve the problem, as long as
one never goes play and capture game simultaneously, but beware
trying both at once, the early TRIGGER_STOP will cut off the other
activity prematurely. So now playing and capturing is scrutinized
separately, instead of by counting.
Signed-off-by: NOskar Schirmer <oskar@scara.com>
Signed-off-by: NMark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
      fc7dc61d
    • T
      ASoC: blackfin: Fix missing break · afed4dbe
      由 Takashi Iwai 提交于 
      Fixes: 4b2ffc20 ('ASoC: Blackfin I2S: add 8-bit sample support')
Reported-by: David Binderman
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NMark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
      afed4dbe
  11. 13 11月, 2013 3 次提交
  13. 12 11月, 2013 2 次提交
  15. 08 11月, 2013 20 次提交
  17. 07 11月, 2013 1 次提交
  19. 06 11月, 2013 2 次提交