ASoC: rsnd: add HDMI output support

Renesas R-Car Gen3 can output HDMI sound if SSIU/SSI are connected to
R-Car built-in HDMI device (R-Car Gen3 built-in HDMI device will be
controlled by DRM/KMS driver).
If SSIx was connected to HDMI0/1 on DT, SSI driver will detect it
automatically by this patch.
Note is that now Renesas R-Car sound driver is assuming that it is
using OF-graph base simple card for HDMI sound.

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

1 files changed, 37 insertions, 0 deletions

diff --git a/sound/soc/sh/rcar/ssiu.c b/sound/soc/sh/rcar/ssiu.c
index 14fafdaf1395..13d648ef1ed6 100644
--- a/sound/soc/sh/rcar/ssiu.c
+++ b/sound/soc/sh/rcar/ssiu.c
@@ -123,6 +123,7 @@ static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
 			       struct rsnd_dai_stream *io,
 			       struct rsnd_priv *priv)
 {
+	int hdmi = rsnd_ssi_hdmi_port(io);
 	int ret;
 
 	ret = rsnd_ssiu_init(mod, io, priv);
@@ -149,6 +150,42 @@ static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
 			       rsnd_get_dalign(mod, io));
 	}
 
+	if (hdmi) {
+		enum rsnd_mod_type rsnd_ssi_array[] = {
+			RSND_MOD_SSIM1,
+			RSND_MOD_SSIM2,
+			RSND_MOD_SSIM3,
+		};
+		struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
+		struct rsnd_mod *pos;
+		u32 val;
+		int i, shift;
+
+		i = rsnd_mod_id(ssi_mod);
+
+		/* output all same SSI as default */
+		val =	i << 16 |
+			i << 20 |
+			i << 24 |
+			i << 28 |
+			i;
+
+		for_each_rsnd_mod_array(i, pos, io, rsnd_ssi_array) {
+			shift	= (i * 4) + 16;
+			val	= (val & ~(0xF << shift)) |
+				rsnd_mod_id(pos) << shift;
+		}
+
+		switch (hdmi) {
+		case RSND_SSI_HDMI_PORT0:
+			rsnd_mod_write(mod, HDMI0_SEL, val);
+			break;
+		case RSND_SSI_HDMI_PORT1:
+			rsnd_mod_write(mod, HDMI1_SEL, val);
+			break;
+		}
+	}
+
 	return 0;
 }