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Message-Id: <1646817523-26800-1-git-send-email-shengjiu.wang@nxp.com>
Date: Wed, 9 Mar 2022 17:18:43 +0800
From: Shengjiu Wang <shengjiu.wang@....com>
To: nicoleotsuka@...il.com, Xiubo.Lee@...il.com, festevam@...il.com,
shengjiu.wang@...il.com, lgirdwood@...il.com, broonie@...nel.org,
perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org
Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: fsl_spdif: keep all TxClk sources by txclk array
From: Viorel Suman <viorel.suman@....com>
Use txclk array to keep all TxClk sources instead of keeping
clocks per rate - need to do this in order to avoid multiple
prepare_enable/disable_unprepare of the same clock during
suspend/resume.
Signed-off-by: Viorel Suman <viorel.suman@....com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
---
sound/soc/fsl/fsl_spdif.c | 41 +++++++++++++++++++--------------------
1 file changed, 20 insertions(+), 21 deletions(-)
diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index 57c41b2f7d17..e0acce6b2213 100644
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -125,7 +125,7 @@ struct fsl_spdif_priv {
u16 sysclk_df[SPDIF_TXRATE_MAX];
u8 txclk_src[SPDIF_TXRATE_MAX];
u8 rxclk_src;
- struct clk *txclk[SPDIF_TXRATE_MAX];
+ struct clk *txclk[STC_TXCLK_SRC_MAX];
struct clk *rxclk;
struct clk *coreclk;
struct clk *sysclk;
@@ -526,7 +526,7 @@ static int spdif_set_sample_rate(struct snd_pcm_substream *substream,
goto clk_set_bypass;
/* The S/PDIF block needs a clock of 64 * fs * txclk_df */
- ret = clk_set_rate(spdif_priv->txclk[rate],
+ ret = clk_set_rate(spdif_priv->txclk[clk],
64 * sample_rate * txclk_df);
if (ret) {
dev_err(&pdev->dev, "failed to set tx clock rate\n");
@@ -537,7 +537,7 @@ static int spdif_set_sample_rate(struct snd_pcm_substream *substream,
dev_dbg(&pdev->dev, "expected clock rate = %d\n",
(64 * sample_rate * txclk_df * sysclk_df));
dev_dbg(&pdev->dev, "actual clock rate = %ld\n",
- clk_get_rate(spdif_priv->txclk[rate]));
+ clk_get_rate(spdif_priv->txclk[clk]));
/* set fs field in consumer channel status */
spdif_set_cstatus(ctrl, IEC958_AES3_CON_FS, csfs);
@@ -1376,12 +1376,10 @@ static int fsl_spdif_probe_txclk(struct fsl_spdif_priv *spdif_priv,
struct device *dev = &pdev->dev;
u64 savesub = 100000, ret;
struct clk *clk;
- char tmp[16];
int i;
for (i = 0; i < STC_TXCLK_SRC_MAX; i++) {
- sprintf(tmp, "rxtx%d", i);
- clk = devm_clk_get(dev, tmp);
+ clk = spdif_priv->txclk[i];
if (IS_ERR(clk)) {
dev_err(dev, "no rxtx%d clock in devicetree\n", i);
return PTR_ERR(clk);
@@ -1395,7 +1393,6 @@ static int fsl_spdif_probe_txclk(struct fsl_spdif_priv *spdif_priv,
continue;
savesub = ret;
- spdif_priv->txclk[index] = clk;
spdif_priv->txclk_src[index] = i;
/* To quick catch a divisor, we allow a 0.1% deviation */
@@ -1407,7 +1404,7 @@ static int fsl_spdif_probe_txclk(struct fsl_spdif_priv *spdif_priv,
spdif_priv->txclk_src[index], rate[index]);
dev_dbg(dev, "use txclk df %d for %dHz sample rate\n",
spdif_priv->txclk_df[index], rate[index]);
- if (clk_is_match(spdif_priv->txclk[index], spdif_priv->sysclk))
+ if (clk_is_match(spdif_priv->txclk[spdif_priv->txclk_src[index]], spdif_priv->sysclk))
dev_dbg(dev, "use sysclk df %d for %dHz sample rate\n",
spdif_priv->sysclk_df[index], rate[index]);
dev_dbg(dev, "the best rate for %dHz sample rate is %dHz\n",
@@ -1423,6 +1420,7 @@ static int fsl_spdif_probe(struct platform_device *pdev)
struct resource *res;
void __iomem *regs;
int irq, ret, i;
+ char tmp[16];
spdif_priv = devm_kzalloc(&pdev->dev, sizeof(*spdif_priv), GFP_KERNEL);
if (!spdif_priv)
@@ -1462,8 +1460,17 @@ static int fsl_spdif_probe(struct platform_device *pdev)
}
}
+ for (i = 0; i < STC_TXCLK_SRC_MAX; i++) {
+ sprintf(tmp, "rxtx%d", i);
+ spdif_priv->txclk[i] = devm_clk_get(&pdev->dev, tmp);
+ if (IS_ERR(spdif_priv->txclk[i])) {
+ dev_err(&pdev->dev, "no rxtx%d clock in devicetree\n", i);
+ return PTR_ERR(spdif_priv->txclk[i]);
+ }
+ }
+
/* Get system clock for rx clock rate calculation */
- spdif_priv->sysclk = devm_clk_get(&pdev->dev, "rxtx5");
+ spdif_priv->sysclk = spdif_priv->txclk[5];
if (IS_ERR(spdif_priv->sysclk)) {
dev_err(&pdev->dev, "no sys clock (rxtx5) in devicetree\n");
return PTR_ERR(spdif_priv->sysclk);
@@ -1481,7 +1488,7 @@ static int fsl_spdif_probe(struct platform_device *pdev)
dev_warn(&pdev->dev, "no spba clock in devicetree\n");
/* Select clock source for rx/tx clock */
- spdif_priv->rxclk = devm_clk_get(&pdev->dev, "rxtx1");
+ spdif_priv->rxclk = spdif_priv->txclk[1];
if (IS_ERR(spdif_priv->rxclk)) {
dev_err(&pdev->dev, "no rxtx1 clock in devicetree\n");
return PTR_ERR(spdif_priv->rxclk);
@@ -1562,9 +1569,7 @@ static int fsl_spdif_runtime_suspend(struct device *dev)
&spdif_priv->regcache_srpc);
regcache_cache_only(spdif_priv->regmap, true);
- clk_disable_unprepare(spdif_priv->rxclk);
-
- for (i = 0; i < SPDIF_TXRATE_MAX; i++)
+ for (i = 0; i < STC_TXCLK_SRC_MAX; i++)
clk_disable_unprepare(spdif_priv->txclk[i]);
if (!IS_ERR(spdif_priv->spbaclk))
@@ -1594,16 +1599,12 @@ static int fsl_spdif_runtime_resume(struct device *dev)
}
}
- for (i = 0; i < SPDIF_TXRATE_MAX; i++) {
+ for (i = 0; i < STC_TXCLK_SRC_MAX; i++) {
ret = clk_prepare_enable(spdif_priv->txclk[i]);
if (ret)
goto disable_tx_clk;
}
- ret = clk_prepare_enable(spdif_priv->rxclk);
- if (ret)
- goto disable_tx_clk;
-
regcache_cache_only(spdif_priv->regmap, false);
regcache_mark_dirty(spdif_priv->regmap);
@@ -1613,12 +1614,10 @@ static int fsl_spdif_runtime_resume(struct device *dev)
ret = regcache_sync(spdif_priv->regmap);
if (ret)
- goto disable_rx_clk;
+ goto disable_tx_clk;
return 0;
-disable_rx_clk:
- clk_disable_unprepare(spdif_priv->rxclk);
disable_tx_clk:
for (i--; i >= 0; i--)
clk_disable_unprepare(spdif_priv->txclk[i]);
--
2.17.1
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