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From:   Vijendar Mukunda <Vijendar.Mukunda@amd.com>
To:     <broonie@kernel.org>, <alsa-devel@alsa-project.org>
CC:     <Alexander.Deucher@amd.com>, <Sunil-kumar.Dommati@amd.com>,
        <krisman@collabora.com>, <wtli@nuvoton.com>,
        Vijendar Mukunda <Vijendar.Mukunda@amd.com>,
        Liam Girdwood <lgirdwood@gmail.com>,
        "Jaroslav Kysela" <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
        open list <linux-kernel@vger.kernel.org>
Subject: [PATCH 5/9] ASoC: amd: vg: apply sample bits pcm constraint
Date:   Wed, 23 Feb 2022 12:49:34 +0530
Message-ID: <20220223071959.13539-5-Vijendar.Mukunda@amd.com>
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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>
---
 sound/soc/amd/vangogh/acp5x-mach.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sound/soc/amd/vangogh/acp5x-mach.c b/sound/soc/amd/vangogh/acp5x-mach.c
index e610616d796c..18b2fdc8dc9e 100644
--- 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;
 }
 
-- 
2.17.1