linux-kernel - [PATCH] ASoC: amd: Adding TDM support in hw

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Message-ID: <1583751029-2850-1-git-send-email-Vishnuvardhanrao.Ravulapati@amd.com>
Date:   Mon, 9 Mar 2020 16:20:10 +0530
From:   Ravulapati Vishnu vardhan rao 
        <Vishnuvardhanrao.Ravulapati@....com>
To:     unlisted-recipients:; (no To-header on input)
CC:     <Alexander.Deucher@....com>, <broonie@...nel.org>,
        "Ravulapati Vishnu vardhan rao" <Vishnuvardhanrao.Ravulapati@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Wei Yongjun <weiyongjun1@...wei.com>,
        Akshu Agrawal <akshu.agrawal@....com>,
        "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH] ASoC: amd: Adding TDM support in hw_params.

TDM related settings for ACP registers in hw_params.
When TDM mode is enabled, Hw_params needs to read and write
from/to respective TX/RX (ACP_(I2S/BT)TDM_(TX/RX)FRMT) registers.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@....com>
---
 sound/soc/amd/raven/acp3x-i2s.c | 44 ++++++++++++-----------------------------
 1 file changed, 13 insertions(+), 31 deletions(-)

diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
index 91a3881..3a3c47e 100644
--- a/sound/soc/amd/raven/acp3x-i2s.c
+++ b/sound/soc/amd/raven/acp3x-i2s.c
@@ -42,7 +42,7 @@ static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai,
 		u32 tx_mask, u32 rx_mask, int slots, int slot_width)
 {
 	struct i2s_dev_data *adata;
-	u32 val, reg_val, frmt_reg, frm_len;
+	u32 frm_len;
 	u16 slot_len;
 
 	adata = snd_soc_dai_get_drvdata(cpu_dai);
@@ -64,36 +64,7 @@ static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai,
 	default:
 		return -EINVAL;
 	}
-
-	/* Enable I2S/BT channels TDM, respective TX/RX frame lengths.*/
-
 	frm_len = FRM_LEN | (slots << 15) | (slot_len << 18);
-	if (adata->substream_type == SNDRV_PCM_STREAM_PLAYBACK) {
-		switch (adata->i2s_instance) {
-		case I2S_BT_INSTANCE:
-			reg_val = mmACP_BTTDM_ITER;
-			frmt_reg = mmACP_BTTDM_TXFRMT;
-			break;
-		case I2S_SP_INSTANCE:
-		default:
-			reg_val = mmACP_I2STDM_ITER;
-			frmt_reg = mmACP_I2STDM_TXFRMT;
-		}
-	} else {
-		switch (adata->i2s_instance) {
-		case I2S_BT_INSTANCE:
-			reg_val = mmACP_BTTDM_IRER;
-			frmt_reg = mmACP_BTTDM_RXFRMT;
-			break;
-		case I2S_SP_INSTANCE:
-		default:
-			reg_val = mmACP_I2STDM_IRER;
-			frmt_reg = mmACP_I2STDM_RXFRMT;
-		}
-	}
-	val = rv_readl(adata->acp3x_base + reg_val);
-	rv_writel(val | 0x2, adata->acp3x_base + reg_val);
-	rv_writel(frm_len, adata->acp3x_base + frmt_reg);
 	adata->tdm_fmt = frm_len;
 	return 0;
 }
@@ -105,12 +76,14 @@ static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream,
 	struct snd_soc_pcm_runtime *prtd;
 	struct snd_soc_card *card;
 	struct acp3x_platform_info *pinfo;
+	struct i2s_dev_data *adata;
 	u32 val;
-	u32 reg_val;
+	u32 reg_val, frmt_reg;
 
 	prtd = substream->private_data;
 	rtd = substream->runtime->private_data;
 	card = prtd->card;
+	adata = snd_soc_dai_get_drvdata(dai);
 	pinfo = snd_soc_card_get_drvdata(card);
 	if (pinfo) {
 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
@@ -141,21 +114,30 @@ static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream,
 		switch (rtd->i2s_instance) {
 		case I2S_BT_INSTANCE:
 			reg_val = mmACP_BTTDM_ITER;
+			frmt_reg = mmACP_BTTDM_TXFRMT;
 			break;
 		case I2S_SP_INSTANCE:
 		default:
 			reg_val = mmACP_I2STDM_ITER;
+			frmt_reg = mmACP_I2STDM_TXFRMT;
 		}
 	} else {
 		switch (rtd->i2s_instance) {
 		case I2S_BT_INSTANCE:
 			reg_val = mmACP_BTTDM_IRER;
+			frmt_reg = mmACP_BTTDM_RXFRMT;
 			break;
 		case I2S_SP_INSTANCE:
 		default:
 			reg_val = mmACP_I2STDM_IRER;
+			frmt_reg = mmACP_I2STDM_RXFRMT;
 		}
 	}
+	if (adata->tdm_mode) {
+		val = rv_readl(rtd->acp3x_base + reg_val);
+		rv_writel(val | 0x2, rtd->acp3x_base + reg_val);
+		rv_writel(adata->tdm_fmt, rtd->acp3x_base + frmt_reg);
+	}
 	val = rv_readl(rtd->acp3x_base + reg_val);
 	val = val | (rtd->xfer_resolution  << 3);
 	rv_writel(val, rtd->acp3x_base + reg_val);
-- 
2.7.4