ASoC: spdif: Add S32_LE support for S/PDIF dummy codec drivers

AIO on UniPhier can output S/PDIF where no codec is needed.
This patch adds S32_LE support for dummy codec drivers.

If one S/PDIF controller has its own limitation, its CPU DAI driver should
set the supported format by its own circumstance, since the soc-pcm driver
will use the intersection of cpu_dai's formats and codec_dai's formats.
Signed-off-by: Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/spdif_receiver.c

@@ -35,9 +35,10 @@ static const struct snd_soc_dapm_route dir_routes[] = {
 #define STUB_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | \
 			SNDRV_PCM_FMTBIT_S20_3LE | \
 			SNDRV_PCM_FMTBIT_S24_LE  | \
+			SNDRV_PCM_FMTBIT_S32_LE | \
 			SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
 
-static const struct snd_soc_codec_driver soc_codec_spdif_dir = {
+static struct snd_soc_codec_driver soc_codec_spdif_dir = {
 	.component_driver = {
 		.dapm_widgets		= dir_widgets,
 		.num_dapm_widgets	= ARRAY_SIZE(dir_widgets),

sound/soc/codecs/spdif_transmitter.c

@@ -27,7 +27,8 @@
 #define STUB_RATES	SNDRV_PCM_RATE_8000_192000
 #define STUB_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | \
 			SNDRV_PCM_FMTBIT_S20_3LE | \
-			SNDRV_PCM_FMTBIT_S24_LE)
+			SNDRV_PCM_FMTBIT_S24_LE  | \
+			SNDRV_PCM_FMTBIT_S32_LE)
 
 static const struct snd_soc_dapm_widget dit_widgets[] = {
 	SND_SOC_DAPM_OUTPUT("spdif-out"),
@@ -37,7 +38,7 @@ static const struct snd_soc_dapm_route dit_routes[] = {
 	{ "spdif-out", NULL, "Playback" },
 };
 
-static const struct snd_soc_codec_driver soc_codec_spdif_dit = {
+static struct snd_soc_codec_driver soc_codec_spdif_dit = {
 	.component_driver = {
 		.dapm_widgets		= dit_widgets,
 		.num_dapm_widgets	= ARRAY_SIZE(dit_widgets),