ASoC: rsnd: Fix parent SSI start/stop in multi-SSI mode

The parent SSI of a multi-SSI setup must be fully setup, started and
stopped since it is also part of the playback/capture setup. So only
skip the SSI (as per commit 203cdf51f2 ("ASoC: rsnd: SSI parent cares
SWSP bit") and commit 597b046f0d ("ASoC: rsnd: control SSICR::EN
correctly")) if the SSI is parent outside of a multi-SSI setup.

Signed-off-by: Matthias Blankertz <matthias.blankertz@cetitec.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/20200415141017.384017-2-matthias.blankertz@cetitec.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/ssi.c

@@ -407,7 +407,7 @@ static void rsnd_ssi_config_init(struct rsnd_mod *mod,
 	 * We shouldn't exchange SWSP after running.
 	 * This means, parent needs to care it.
 	 */
-	if (rsnd_ssi_is_parent(mod, io))
+	if (rsnd_ssi_is_parent(mod, io) && !rsnd_ssi_multi_slaves(io))
 		goto init_end;
 
 	if (rsnd_io_is_play(io))
@@ -559,7 +559,7 @@ static int rsnd_ssi_start(struct rsnd_mod *mod,
 	 * EN is for data output.
 	 * SSI parent EN is not needed.
 	 */
-	if (rsnd_ssi_is_parent(mod, io))
+	if (rsnd_ssi_is_parent(mod, io) && !rsnd_ssi_multi_slaves(io))
 		return 0;
 
 	ssi->cr_en = EN;
@@ -582,7 +582,7 @@ static int rsnd_ssi_stop(struct rsnd_mod *mod,
 	if (!rsnd_ssi_is_run_mods(mod, io))
 		return 0;
 
-	if (rsnd_ssi_is_parent(mod, io))
+	if (rsnd_ssi_is_parent(mod, io) && !rsnd_ssi_multi_slaves(io))
 		return 0;
 
 	cr  =	ssi->cr_own	|
@@ -620,7 +620,7 @@ static int rsnd_ssi_irq(struct rsnd_mod *mod,
 	if (rsnd_is_gen1(priv))
 		return 0;
 
-	if (rsnd_ssi_is_parent(mod, io))
+	if (rsnd_ssi_is_parent(mod, io) && !rsnd_ssi_multi_slaves(io))
 		return 0;
 
 	if (!rsnd_ssi_is_run_mods(mod, io))