linux-kernel - [PATCH] ASOC: amd: acp: Add TDM slots setting support for ACP I2S controller

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Date:   Tue, 18 Oct 2022 17:57:06 +0530
From:   Venkata Prasad Potturu <venkataprasad.potturu@....com>
To:     <broonie@...nel.org>, <alsa-devel@...a-project.org>
CC:     <vsujithkumar.reddy@....com>, <Vijendar.Mukunda@....com>,
        <Basavaraj.Hiregoudar@....com>, <Sunil-kumar.Dommati@....com>,
        <ssabakar@....com>,
        Venkata Prasad Potturu <venkataprasad.potturu@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        V sujith kumar Reddy <Vsujithkumar.Reddy@....com>,
        Ajit Kumar Pandey <AjitKumar.Pandey@....com>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH] ASOC: amd: acp: Add TDM slots setting support for ACP I2S controller

Modify set tdm slot function to set ACP I2S controller slots
in tdm mode based on number of slots.

Signed-off-by: Venkata Prasad Potturu <venkataprasad.potturu@....com>
---
 sound/soc/amd/acp/acp-i2s.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/sound/soc/amd/acp/acp-i2s.c b/sound/soc/amd/acp/acp-i2s.c
index ac416572db0d..09b6511c0a26 100644
--- a/sound/soc/amd/acp/acp-i2s.c
+++ b/sound/soc/amd/acp/acp-i2s.c
@@ -51,7 +51,7 @@ static int acp_i2s_set_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask, u32 rx_mas
 	struct device *dev = dai->component->dev;
 	struct acp_dev_data *adata = snd_soc_dai_get_drvdata(dai);
 	struct acp_stream *stream;
-	int slot_len;
+	int slot_len, no_of_slots;
 
 	switch (slot_width) {
 	case SLOT_WIDTH_8:
@@ -71,6 +71,20 @@ static int acp_i2s_set_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask, u32 rx_mas
 		return -EINVAL;
 	}
 
+	switch (slots) {
+	case 1 ... 7:
+		no_of_slots = slots;
+		break;
+	case 8:
+		no_of_slots = 0;
+		break;
+	default:
+		dev_err(dev, "Unsupported slots %d\n", slots);
+		return -EINVAL;
+	}
+
+	slots = no_of_slots;
+
 	spin_lock_irq(&adata->acp_lock);
 	list_for_each_entry(stream, &adata->stream_list, list) {
 		if (tx_mask && stream->dir == SNDRV_PCM_STREAM_PLAYBACK)
-- 
2.25.1