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

[Caleb Crome]

On Tue, May 3, 2016 at 5:24 AM, Fabio Estevam <festevam at gmail.com> wrote:
> 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>
Tested-by: Caleb Crome <caleb at crome.org>