[RFC,0/2] ASoC: mediatek: mt8183-da7219: use SND_SOC_DAPM_PINCTRL

Message

Tzung-Bi Shih Feb. 19, 2020, 9:38 a.m. UTC

In previous discussion[1], Mark thinks we should have something general
pinctrl integration with DAPM.  SND_SOC_DAPM_PINCTRL is exactly what we
want but I failed to find existing usage (maybe in topology files?).

To be equivalent to mt8183-da7219's original implementation, the 1st
patch selects sleep-state at the beginning.  The 2nd patch attaches the
DAPM widget to playback stream.  When the stream is about to start, the
power on sequence selects the active-state.  When the stream is about
to stop, the power off sequence selects the sleep-state.

Note: the DAI links will connect to hdmi-codec, that's why the playback
      stream name is "I2S Playback".
Note: this is a RFC series.  If it makes sense, will also apply to
      mt8183-mt6358.

[1]: https://patchwork.kernel.org/patch/11379735/

Tzung-Bi Shih (2):
  ASoC: dapm: select sleep_state when initializing PINCTRL widget
  ASoC: mediatek: mt8183-da7219: use SND_SOC_DAPM_PINCTRL in TDM out

 .../mediatek/mt8183/mt8183-da7219-max98357.c  | 98 ++-----------------
 sound/soc/soc-dapm.c                          |  3 +
 2 files changed, 13 insertions(+), 88 deletions(-)