1. 11 May, 2020 1 commit
  2. 08 May, 2020 3 commits
  3. 07 May, 2020 4 commits
  4. 06 May, 2020 1 commit
  5. 05 May, 2020 2 commits
    • Stephan Gerhold's avatar
      ASoC: qcom: lpass-cpu: Make I2S SD lines configurable · 4ff028f6
      Stephan Gerhold authored
      The LPASS hardware allows configuring the MI2S SD lines to use
      when playing/recording audio. However, at the moment the lpass-cpu
      driver has SD0 hard-coded for mono/stereo (or additional fixed
      SD lines for more channels).
      
      For weird reasons there seems to be hardware that uses one of the
      other SD lines for mono/stereo. For example, some Samsung devices
      use an external Speaker amplifier connected to Quaternary MI2S.
      For some reason, the SD line for audio playback was connected to
      SD1 rather than SD0. (I have no idea why...)
      At the moment, the lpass-cpu driver cannot be configured to work
      for the Speaker on these devices.
      
      The q6afe driver already allows configuring the MI2S SD lines
      through the "qcom,sd-lines" device tree property, but this works
      only when routing audio through the ADSP.
      
      This commit adds a very similar configuration for the lpass-cpu driver.
      It is now possible to add additional subnodes to the lpass device in
      the device tree, to configure the SD lines for playback and/or capture.
      E.g. for the Samsung devices mentioned above:
      
      &lpass {
      	dai@3 {
      		reg = <MI2S_QUATERNARY>;
      		qcom,playback-sd-lines = <1>;
      	};
      };
      
      qcom,playback/capture-sd-lines takes a list of SD lines (0-3)
      in the same format as the q6afe driver. (The difference here is that
      q6afe has separate DAIs for playback/capture, while lpass-cpu has one
      for both...)
      
      For backwards compatibility with older device trees, the lpass-cpu driver
      defaults to LPAIF_I2SCTL_MODE_8CH if the subnode for a DAI is missing.
      This is equivalent to the previous behavior: Up to 8 channels can be
      configured, and SD0/QUAT01 will be chosen when setting up a stream
      with fewer channels.
      
      This allows the speaker to work on Samsung MSM8916 devices
      that use an external speaker amplifier.
      Signed-off-by: default avatarStephan Gerhold <stephan@gerhold.net>
      Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
      Link: https://lore.kernel.org/r/20200425184657.121991-2-stephan@gerhold.netSigned-off-by: default avatarMark Brown <broonie@kernel.org>
      4ff028f6
    • Stephan Gerhold's avatar
      dt-bindings: sound: lpass-cpu: Document DAI subnodes · d5797ede
      Stephan Gerhold authored
      The lpass-cpu driver now allows configuring the MI2S SD lines
      by defining subnodes for one of the DAIs.
      
      Document this in the device tree bindings.
      Signed-off-by: default avatarStephan Gerhold <stephan@gerhold.net>
      Link: https://lore.kernel.org/r/20200425184657.121991-1-stephan@gerhold.netSigned-off-by: default avatarMark Brown <broonie@kernel.org>
      d5797ede
  6. 04 May, 2020 4 commits
  7. 01 May, 2020 3 commits
  8. 30 Apr, 2020 13 commits
  9. 29 Apr, 2020 9 commits