[PATCH v2] ASoC: rsnd: fix DALIGN register for SSIU

[Eugeniu Rosca <erosca@de.adit-jv.com>]

From: Nilkanth Ahirrao <anilkanth@jp.adit-jv.com>

The current driver only sets 0x76543210 and 0x67452301 for DALIGN.
This doesn’t work well for TDM split and ex-split mode for all SSIU.
This patch programs the DALIGN registers based on the SSIU number.

Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Cc: Jiada Wang <jiada_wang@mentor.com>
Cc: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Fixes: a914e44693d41b ("ASoC: rsnd: more clear rsnd_get_dalign() for DALIGN")
Signed-off-by: Nilkanth Ahirrao <anilkanth@jp.adit-jv.com>
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
---
v2:
 - Follow Kuninori Morimoto's suggestion to reuse dalign_values[0][x]
 - Simplify the code based on Andrew Gabbasov's review finding
v1:
 - https://patchwork.kernel.org/patch/11249769/
---
 sound/soc/sh/rcar/core.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index e9596c2096cd..a6c1cf987e6e 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -376,6 +376,17 @@ u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
  */
 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 {
+	static const u32 dalign_values[8][2] = {
+		{0x76543210, 0x67452301},
+		{0x00000032, 0x00000023},
+		{0x00007654, 0x00006745},
+		{0x00000076, 0x00000067},
+		{0xfedcba98, 0xefcdab89},
+		{0x000000ba, 0x000000ab},
+		{0x0000fedc, 0x0000efcd},
+		{0x000000fe, 0x000000ef},
+	};
+	int id = 0, inv;
 	struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
 	struct rsnd_mod *target;
 	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
@@ -411,13 +422,18 @@ u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 		target = cmd ? cmd : ssiu;
 	}
 
+	if (mod == ssiu)
+		id = rsnd_mod_id_sub(mod);
+
 	/* Non target mod or non 16bit needs normal DALIGN */
 	if ((snd_pcm_format_width(runtime->format) != 16) ||
 	    (mod != target))
-		return 0x76543210;
+		inv = 0;
 	/* Target mod needs inverted DALIGN when 16bit */
 	else
-		return 0x67452301;
+		inv = 1;
+
+	return dalign_values[id][inv];
 }
 
 u32 rsnd_get_busif_shift(struct rsnd_dai_stream *io, struct rsnd_mod *mod)
-- 
2.24.0