linux-kernel - [PATCH 3/6] ASoC: amd: add ACP3x TDM mode support

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Message-ID: <1577451055-9182-4-git-send-email-Vishnuvardhanrao.Ravulapati@amd.com>
Date:   Fri, 27 Dec 2019 18:20:52 +0530
From:   Ravulapati Vishnu vardhan rao 
        <Vishnuvardhanrao.Ravulapati@....com>
To:     unlisted-recipients:; (no To-header on input)
CC:     <Alexander.Deucher@....com>, <djkurtz@...gle.com>,
        <pierre-louis.bossart@...ux.intel.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>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/6] ASoC: amd: add ACP3x TDM mode support

ACP3x I2S (CPU DAI) can act in normal I2S and TDM modes. Added support
for TDM mode. Desired mode can be selected from ASoC machine driver.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@....com>
---
 sound/soc/amd/raven/acp3x-i2s.c | 28 ++++++++++++++++++++++------
 sound/soc/amd/raven/acp3x.h     |  1 +
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
index 7f05782..0856e0c 100644
--- a/sound/soc/amd/raven/acp3x-i2s.c
+++ b/sound/soc/amd/raven/acp3x-i2s.c
@@ -43,7 +43,7 @@ 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_val, frm_len;
+	u32 val, reg_val, frmt_reg, frm_len;
 	u16 slot_len;
 
 	adata = snd_soc_dai_get_drvdata(cpu_dai);
@@ -70,15 +70,31 @@ static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai,
 
 	frm_len = FRM_LEN | (slots << 15) | (slot_len << 18);
 	if (adata->substream_type == SNDRV_PCM_STREAM_PLAYBACK) {
-		reg_val = mmACP_BTTDM_ITER;
-		frmt_val = mmACP_BTTDM_TXFRMT;
+		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 {
-		reg_val = mmACP_BTTDM_IRER;
-		frmt_val = mmACP_BTTDM_RXFRMT;
+		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_val);
+	rv_writel(frm_len, adata->acp3x_base + frmt_reg);
 	adata->tdm_fmt = frm_len;
 	return 0;
 }
diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h
index a1cdc4e..43213ae 100644
--- a/sound/soc/amd/raven/acp3x.h
+++ b/sound/soc/amd/raven/acp3x.h
@@ -78,6 +78,7 @@ struct acp3x_platform_info {
 struct i2s_dev_data {
 	bool tdm_mode;
 	unsigned int i2s_irq;
+	u16 i2s_instance;
 	u32 tdm_fmt;
 	u32 substream_type;
 	void __iomem *acp3x_base;
-- 
2.7.4