[alsa-devel] [PATCH v4 6/6] ASoC: fsl_ssi: Fix channel slipping on capture (or playback) restart in full duplex.

[Fabio Estevam]

On Tue, May 3, 2016 at 9:14 AM, Arnaud Mouiche
<arnaud.mouiche at invoxia.com> wrote:
> Happened when the Playback (or Capture) is running continuously
> and Capture (or Playback) is restarted (xrun, manual stop/start...)
>
> Since the RX (or TX) FIFO are only reset when the whole SSI is disabled,
> pending samples from previous capture (or playback) session may still
> be present. They must be erased to not introduce channel slipping.
>
> FIFO Clear register fields are documented in IMX51, IMX35 reference manual.
> They are not documented in IMX50 or IMX6 RM, despite they are
> working as expected on IMX6SL and IMX6solo.
>
> Signed-off-by: Arnaud Mouiche <arnaud.mouiche at invoxia.com>

Reviewed-by: Fabio Estevam <fabio.estevam at nxp.com>