ASoC: amd: vg: apply sample bits pcm constraint

ACP I2S controller has limitation to program different BCLK
for TX and RX paths.
Headset path uses I2S SP controller instance.
As per requirement, Restricted 32 bits as sample bits by
applying pcm constraint in startup calabck for Headset path.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20220223071959.13539-5-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/amd/vangogh/acp5x-mach.c b/sound/soc/amd/vangogh/acp5x-mach.c
index e610616d796c0dabc6803c7c9f625b83545a0d33..18b2fdc8dc9e94892487469e370eabca019e57d8 100644 (file)
--- a/sound/soc/amd/vangogh/acp5x-mach.c
+++ b/sound/soc/amd/vangogh/acp5x-mach.c
@@ -100,6 +100,13 @@ static const struct snd_pcm_hw_constraint_list constraints_channels = {
        .mask = 0,
 };
 
+static const unsigned int acp5x_nau8821_format[] = {32};
+
+static struct snd_pcm_hw_constraint_list constraints_sample_bits = {
+       .list = acp5x_nau8821_format,
+       .count = ARRAY_SIZE(acp5x_nau8821_format),
+};
+
 static int acp5x_8821_startup(struct snd_pcm_substream *substream)
 {
        struct snd_pcm_runtime *runtime = substream->runtime;
@@ -115,6 +122,9 @@ static int acp5x_8821_startup(struct snd_pcm_substream *substream)
                                   &constraints_channels);
        snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
                                   &constraints_rates);
+       snd_pcm_hw_constraint_list(substream->runtime, 0,
+                                  SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
+                                  &constraints_sample_bits);
        return 0;
 }