ASoC: rsnd: each mod has status again for CTU/MUX support

SSI will be used as normal SSI or as clock parent SSI. Therefor,
rsnd driver wants to control SSI and parent SSI separately. Otherwise it
can't use Playback/Capture in the same time.
And it has been done by c2dc47d5cf("ASoC: rsnd: rsnd_dai_stream has each
mod's status insted of rsnd_mod") before.

OTOH, rsnd driver doesn't want to control CTU/MUX/DVC/SSIU/SSI in
separately. Otherwise, these will be re-initialized during playing if
MUX merges 2 sounds.
Because of these picky reasons, this patch re-defines status on each mod,
and add new parent_ssi_status on rsnd_dai_stream.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 36 insertions, 1 deletions

diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
index df3ab74adf3e..e68f3a1c9cb4 100644
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -857,6 +857,41 @@ int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
 	return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE);
 }
 
+static u32 *rsnd_ssi_get_status(struct rsnd_dai_stream *io,
+				struct rsnd_mod *mod,
+				enum rsnd_mod_type type)
+{
+	/*
+	 * SSIP (= SSI parent) needs to be special, otherwise,
+	 * 2nd SSI might doesn't start. see also rsnd_mod_call()
+	 *
+	 * We can't include parent SSI status on SSI, because we don't know
+	 * how many SSI requests parent SSI. Thus, it is localed on "io" now.
+	 * ex) trouble case
+	 *	Playback: SSI0
+	 *	Capture : SSI1 (needs SSI0)
+	 *
+	 * 1) start Capture  ->	SSI0/SSI1 are started.
+	 * 2) start Playback ->	SSI0 doesn't work, because it is already
+	 *			marked as "started" on 1)
+	 *
+	 * OTOH, using each mod's status is good for MUX case.
+	 * It doesn't need to start in 2nd start
+	 * ex)
+	 *	IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0
+	 *			    |
+	 *	IO-1: SRC1 -> CTU2 -+
+	 *
+	 * 1) start IO-0 ->	start SSI0
+	 * 2) start IO-1 ->	SSI0 doesn't need to start, because it is
+	 *			already started on 1)
+	 */
+	if (type == RSND_MOD_SSIP)
+		return &io->parent_ssi_status;
+
+	return rsnd_mod_get_status(io, mod, type);
+}
+
 int rsnd_ssi_probe(struct rsnd_priv *priv)
 {
 	struct device_node *node;
@@ -919,7 +954,7 @@ int rsnd_ssi_probe(struct rsnd_priv *priv)
 			ops = &rsnd_ssi_dma_ops;
 
 		ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
-				    RSND_MOD_SSI, i);
+				    rsnd_ssi_get_status, RSND_MOD_SSI, i);
 		if (ret)
 			goto rsnd_ssi_probe_done;