linux-kernel - [PATCH 7/7] ASoC: renesas: rz-ssi: Add support for 32 bits sample width

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Message-ID: <20251112154115.1048298-8-biju.das.jz@bp.renesas.com>
Date: Wed, 12 Nov 2025 15:41:08 +0000
From: Biju <biju.das.au@...il.com>
To: Biju Das <biju.das.jz@...renesas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>
Cc: linux-sound@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Biju Das <biju.das.au@...il.com>
Subject: [PATCH 7/7] ASoC: renesas: rz-ssi: Add support for 32 bits sample width

From: Biju Das <biju.das.jz@...renesas.com>

Add support for 32 bits sample format width for RZ/G2L SoCs.

Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
---
 sound/soc/renesas/rz-ssi.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/sound/soc/renesas/rz-ssi.c b/sound/soc/renesas/rz-ssi.c
index 5ebaaa440141..85d368794de4 100644
--- a/sound/soc/renesas/rz-ssi.c
+++ b/sound/soc/renesas/rz-ssi.c
@@ -75,7 +75,8 @@
 #define PREALLOC_BUFFER_MAX	(SZ_32K)
 
 #define SSI_RATES		SNDRV_PCM_RATE_8000_48000 /* 8k-48kHz */
-#define SSI_FMTS		(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
+#define SSI_FMTS		(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | \
+				 SNDRV_PCM_FMTBIT_S32_LE)
 #define SSI_CHAN_MIN		2
 #define SSI_CHAN_MAX		2
 #define SSI_FIFO_DEPTH		32
@@ -295,7 +296,7 @@ static int rz_ssi_clk_setup(struct rz_ssi_priv *ssi, unsigned int rate,
 	}
 
 	/*
-	 * DWL: Data Word Length = {16, 24} bits
+	 * DWL: Data Word Length = {16, 24, 32} bits
 	 * SWL: System Word Length = 32 bits
 	 */
 	ssicr |= SSICR_CKDV(clk_ckdv);
@@ -307,6 +308,9 @@ static int rz_ssi_clk_setup(struct rz_ssi_priv *ssi, unsigned int rate,
 		ssicr |= SSICR_PDTA;
 		ssicr |= SSICR_DWL(5);
 		break;
+	case 32:
+		ssicr |= SSICR_DWL(6);
+		break;
 	default:
 		dev_err(ssi->dev, "Not support %u data width",
 			ssi->hw_params_cache.sample_width);
@@ -697,7 +701,8 @@ static int rz_ssi_dma_slave_config(struct rz_ssi_priv *ssi,
 	cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 	cfg.dst_addr = ssi->phys + SSIFTDR;
 	cfg.src_addr = ssi->phys + SSIFRDR;
-	if (ssi->hw_params_cache.sample_width == 24) {
+	if (ssi->hw_params_cache.sample_width == 24 ||
+	    ssi->hw_params_cache.sample_width == 32) {
 		cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 		cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 	} else {
@@ -1021,7 +1026,7 @@ static int rz_ssi_dai_hw_params(struct snd_pcm_substream *substream,
 	unsigned int rate = params_rate(params);
 	int ret;
 
-	if (!(sample_bits == 16 || sample_bits == 24)) {
+	if (!(sample_bits == 16 || sample_bits == 24 || sample_bits == 32)) {
 		dev_err(ssi->dev, "Unsupported sample width: %d\n",
 			sample_bits);
 		return -EINVAL;
-- 
2.43.0