linux-kernel - [PATCH] ASoC: fsl_spdif: Add support for 22.05 kHz sample rate

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Message-Id: <20230719163154.19492-1-matuszpd@gmail.com>
Date:   Wed, 19 Jul 2023 18:31:53 +0200
From:   Matus Gajdos <matuszpd@...il.com>
To:     Shengjiu Wang <shengjiu.wang@...il.com>,
        Xiubo Li <Xiubo.Lee@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     Matus Gajdos <matuszpd@...il.com>, alsa-devel@...a-project.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: fsl_spdif: Add support for 22.05 kHz sample rate

Add support for 22.05 kHz sample rate for TX.

Signed-off-by: Matus Gajdos <matuszpd@...il.com>
---
 sound/soc/fsl/fsl_spdif.c | 8 ++++++--
 sound/soc/fsl/fsl_spdif.h | 6 ++++--
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index 015c3708aa04..95e639711eba 100644
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -514,6 +514,10 @@ static int spdif_set_sample_rate(struct snd_pcm_substream *substream,
 	int ret;
 
 	switch (sample_rate) {
+	case 22050:
+		rate = SPDIF_TXRATE_22050;
+		csfs = IEC958_AES3_CON_FS_22050;
+		break;
 	case 32000:
 		rate = SPDIF_TXRATE_32000;
 		csfs = IEC958_AES3_CON_FS_32000;
@@ -1422,7 +1426,7 @@ static u32 fsl_spdif_txclk_caldiv(struct fsl_spdif_priv *spdif_priv,
 				struct clk *clk, u64 savesub,
 				enum spdif_txrate index, bool round)
 {
-	static const u32 rate[] = { 32000, 44100, 48000, 88200, 96000, 176400,
+	static const u32 rate[] = { 22050, 32000, 44100, 48000, 88200, 96000, 176400,
 				    192000, };
 	bool is_sysclk = clk_is_match(clk, spdif_priv->sysclk);
 	u64 rate_ideal, rate_actual, sub;
@@ -1483,7 +1487,7 @@ static u32 fsl_spdif_txclk_caldiv(struct fsl_spdif_priv *spdif_priv,
 static int fsl_spdif_probe_txclk(struct fsl_spdif_priv *spdif_priv,
 				enum spdif_txrate index)
 {
-	static const u32 rate[] = { 32000, 44100, 48000, 88200, 96000, 176400,
+	static const u32 rate[] = { 22050, 32000, 44100, 48000, 88200, 96000, 176400,
 				    192000, };
 	struct platform_device *pdev = spdif_priv->pdev;
 	struct device *dev = &pdev->dev;
diff --git a/sound/soc/fsl/fsl_spdif.h b/sound/soc/fsl/fsl_spdif.h
index 75b42a692c90..2bc1b10c17d4 100644
--- a/sound/soc/fsl/fsl_spdif.h
+++ b/sound/soc/fsl/fsl_spdif.h
@@ -175,7 +175,8 @@ enum spdif_gainsel {
 
 /* SPDIF tx rate */
 enum spdif_txrate {
-	SPDIF_TXRATE_32000 = 0,
+	SPDIF_TXRATE_22050 = 0,
+	SPDIF_TXRATE_32000,
 	SPDIF_TXRATE_44100,
 	SPDIF_TXRATE_48000,
 	SPDIF_TXRATE_88200,
@@ -191,7 +192,8 @@ enum spdif_txrate {
 #define SPDIF_QSUB_SIZE			(SPDIF_UBITS_SIZE / 8)
 
 
-#define FSL_SPDIF_RATES_PLAYBACK	(SNDRV_PCM_RATE_32000 |	\
+#define FSL_SPDIF_RATES_PLAYBACK	(SNDRV_PCM_RATE_22050 |	\
+					 SNDRV_PCM_RATE_32000 |	\
 					 SNDRV_PCM_RATE_44100 |	\
 					 SNDRV_PCM_RATE_48000 |	\
 					 SNDRV_PCM_RATE_88200 | \
-- 
2.25.1