linux-kernel - [PATCH linux-next 1/1] ASoC: rsnd: ssiu: reset SSI

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Date:   Thu, 26 Oct 2017 08:07:42 -0700
From:   <jiada_wang@...tor.com>
To:     <lgirdwood@...il.com>, <broonie@...nel.org>, <perex@...ex.cz>,
        <tiwai@...e.com>, <kuninori.morimoto.gx@...esas.com>,
        <gustavo@...eddedor.com>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <jiada_wang@...tor.com>
Subject: [PATCH linux-next 1/1] ASoC: rsnd: ssiu: reset SSI_MODE register

From: Jiada Wang <jiada_wang@...tor.com>

register SSI_MODE is set when SSI works in TDM Extended or
TDM (Ex-)Split mode, but it isn't reset after SSI stops.
this will cause issue, if SSI starts to work in other modes
which requie SSI_MODE to have different value.

This patch resets SSI_MODE register in .stop callback,
when last stream calls .stop.

Fixes: 186fadc132f0 ("ASoC: rsnd: add TDM Extend Mode support")
Signed-off-by: Jiada Wang <jiada_wang@...tor.com>
---
 sound/soc/sh/rcar/ssiu.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/sh/rcar/ssiu.c b/sound/soc/sh/rcar/ssiu.c
index 4d94875..eff9f3b 100644
--- a/sound/soc/sh/rcar/ssiu.c
+++ b/sound/soc/sh/rcar/ssiu.c
@@ -217,6 +217,8 @@ static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod,
 	if (rsnd_ssi_multi_slaves_runtime(io))
 		rsnd_mod_write(mod, SSI_CONTROL, 0);
 
+	rsnd_mod_write(mod, SSI_MODE, 0);
+
 	return 0;
 }
 
-- 
1.7.9.5