[PATCH 1/3] ASoC: Drop SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME flag

[PATCH 1/3] ASoC: Drop SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME flag

[Sylwester Nawrocki]

Since commit 194c7dea00c68c1b1f8ff26304fa937a006f66dd
"ASoC: dmaengine: add custom DMA config to snd_dmaengine_pcm_config"
custom DMA channels can be also specified in chan_names[] field of
struct snd_dmaengine_pcm_config.  This patch drops chan_name field
of struct snd_dmaengine_dai_dma_data and makes soc-generic-dmaengine-pcm
module using config->chan_names instead.  Remaining users of struct
snd_dmaengine_dai_dma_data::chan_name are updated to not require
that field.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
 include/sound/dmaengine_pcm.h         |  6 ------
 sound/soc/samsung/dmaengine.c         |  8 ++------
 sound/soc/samsung/i2s.c               |  3 ---
 sound/soc/samsung/s3c2412-i2s.c       |  2 --
 sound/soc/samsung/s3c24xx-i2s.c       |  2 --
 sound/soc/soc-generic-dmaengine-pcm.c | 12 +++---------
 6 files changed, 5 insertions(+), 28 deletions(-)

diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h
index 67be244..1c8f9e1 100644
--- a/include/sound/dmaengine_pcm.h
+++ b/include/sound/dmaengine_pcm.h
@@ -71,7 +71,6 @@ struct dma_chan *snd_dmaengine_pcm_request_channel(dma_filter_fn filter_fn,
  * @slave_id: Slave requester id for the DMA channel.
  * @filter_data: Custom DMA channel filter data, this will usually be used when
  * requesting the DMA channel.
- * @chan_name: Custom channel name to use when requesting DMA channel.
  * @fifo_size: FIFO size of the DAI controller in bytes
  * @flags: PCM_DAI flags, only SND_DMAENGINE_PCM_DAI_FLAG_PACK for now
  */
@@ -81,7 +80,6 @@ struct snd_dmaengine_dai_dma_data {
 	u32 maxburst;
 	unsigned int slave_id;
 	void *filter_data;
-	const char *chan_name;
 	unsigned int fifo_size;
 	unsigned int flags;
 };
@@ -107,10 +105,6 @@ void snd_dmaengine_pcm_set_config_from_dai_data(
  * playback.
  */
 #define SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX BIT(3)
-/*
- * The PCM streams have custom channel names specified.
- */
-#define SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME BIT(4)
 
 /**
  * struct snd_dmaengine_pcm_config - Configuration data for dmaengine based PCM
diff --git a/sound/soc/samsung/dmaengine.c b/sound/soc/samsung/dmaengine.c
index 9104c98..cda656e 100644
--- a/sound/soc/samsung/dmaengine.c
+++ b/sound/soc/samsung/dmaengine.c
@@ -37,12 +37,8 @@ int samsung_asoc_dma_platform_register(struct device *dev, dma_filter_fn filter,
 	pcm_conf->prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
 	pcm_conf->compat_filter_fn = filter;
 
-	if (dev->of_node) {
-		pcm_conf->chan_names[SNDRV_PCM_STREAM_PLAYBACK] = tx;
-		pcm_conf->chan_names[SNDRV_PCM_STREAM_CAPTURE] = rx;
-	} else {
-		flags |= SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME;
-	}
+	pcm_conf->chan_names[SNDRV_PCM_STREAM_PLAYBACK] = tx;
+	pcm_conf->chan_names[SNDRV_PCM_STREAM_CAPTURE] = rx;
 
 	return devm_snd_dmaengine_pcm_register(dev, pcm_conf, flags);
 }
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index 588aa01..e06aa31 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -1305,8 +1305,6 @@ static int samsung_i2s_probe(struct platform_device *pdev)
 	}
 	pri_dai->dma_playback.addr = regs_base + I2STXD;
 	pri_dai->dma_capture.addr = regs_base + I2SRXD;
-	pri_dai->dma_playback.chan_name = "tx";
-	pri_dai->dma_capture.chan_name = "rx";
 	pri_dai->dma_playback.addr_width = 4;
 	pri_dai->dma_capture.addr_width = 4;
 	pri_dai->quirks = quirks;
@@ -1326,7 +1324,6 @@ static int samsung_i2s_probe(struct platform_device *pdev)
 		sec_dai->lock = &pri_dai->spinlock;
 		sec_dai->variant_regs = pri_dai->variant_regs;
 		sec_dai->dma_playback.addr = regs_base + I2STXDS;
-		sec_dai->dma_playback.chan_name = "tx-sec";
 
 		if (!np) {
 			sec_dai->dma_playback.filter_data = i2s_pdata->dma_play_sec;
diff --git a/sound/soc/samsung/s3c2412-i2s.c b/sound/soc/samsung/s3c2412-i2s.c
index 3e89fbc..40331a0 100644
--- a/sound/soc/samsung/s3c2412-i2s.c
+++ b/sound/soc/samsung/s3c2412-i2s.c
@@ -35,12 +35,10 @@
 #include <linux/platform_data/asoc-s3c.h>
 
 static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_out = {
-	.chan_name	= "tx",
 	.addr_width	= 4,
 };
 
 static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_in = {
-	.chan_name	= "rx",
 	.addr_width	= 4,
 };
 
diff --git a/sound/soc/samsung/s3c24xx-i2s.c b/sound/soc/samsung/s3c24xx-i2s.c
index c78a936..d59a47d 100644
--- a/sound/soc/samsung/s3c24xx-i2s.c
+++ b/sound/soc/samsung/s3c24xx-i2s.c
@@ -33,12 +33,10 @@
 #include <linux/platform_data/asoc-s3c.h>
 
 static struct snd_dmaengine_dai_dma_data s3c24xx_i2s_pcm_stereo_out = {
-	.chan_name	= "tx",
 	.addr_width	= 2,
 };
 
 static struct snd_dmaengine_dai_dma_data s3c24xx_i2s_pcm_stereo_in = {
-	.chan_name	= "rx",
 	.addr_width	= 2,
 };
 
diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
index 6cef397..f2d372d 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -263,7 +263,6 @@ static int dmaengine_pcm_new(struct snd_soc_pcm_runtime *rtd)
 	struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
 	const struct snd_dmaengine_pcm_config *config = pcm->config;
 	struct device *dev = rtd->platform->dev;
-	struct snd_dmaengine_dai_dma_data *dma_data;
 	struct snd_pcm_substream *substream;
 	size_t prealloc_buffer_size;
 	size_t max_buffer_size;
@@ -284,12 +283,9 @@ static int dmaengine_pcm_new(struct snd_soc_pcm_runtime *rtd)
 		if (!substream)
 			continue;
 
-		dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
-
-		if (!pcm->chan[i] &&
-		    (pcm->flags & SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME))
+		if (!pcm->chan[i] && config->chan_names[i])
 			pcm->chan[i] = dma_request_slave_channel(dev,
-				dma_data->chan_name);
+				config->chan_names[i]);
 
 		if (!pcm->chan[i] && (pcm->flags & SND_DMAENGINE_PCM_FLAG_COMPAT)) {
 			pcm->chan[i] = dmaengine_pcm_compat_request_channel(rtd,
@@ -359,9 +355,7 @@ static int dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,
 	const char *name;
 	struct dma_chan *chan;
 
-	if ((pcm->flags & (SND_DMAENGINE_PCM_FLAG_NO_DT |
-			   SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME)) ||
-	    !dev->of_node)
+	if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_NO_DT) || !dev->of_node)
 		return 0;
 
 	if (config && config->dma_dev) {
-- 
1.9.1

[PATCH 2/3] ASoC: samsung: s3c24xx-i2s: Don't use platform_data for DMA parameters

[Sylwester Nawrocki]

Since the s3c24xx-dma is converted to use DMA map we can rely on the
DMA subsystem to match DMA channels and slave devices, rather than
passing DMA details from platform_data.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
 sound/soc/samsung/s3c24xx-i2s.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/sound/soc/samsung/s3c24xx-i2s.c b/sound/soc/samsung/s3c24xx-i2s.c
index d59a47d..29196a9 100644
--- a/sound/soc/samsung/s3c24xx-i2s.c
+++ b/sound/soc/samsung/s3c24xx-i2s.c
@@ -30,8 +30,6 @@
 #include "dma.h"
 #include "s3c24xx-i2s.h"
 
-#include <linux/platform_data/asoc-s3c.h>
-
 static struct snd_dmaengine_dai_dma_data s3c24xx_i2s_pcm_stereo_out = {
 	.addr_width	= 2,
 };
@@ -449,14 +447,8 @@ static int s3c24xx_i2s_resume(struct snd_soc_dai *cpu_dai)
 
 static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
 {
-	int ret = 0;
 	struct resource *res;
-	struct s3c_audio_pdata *pdata = dev_get_platdata(&pdev->dev);
-
-	if (!pdata) {
-		dev_err(&pdev->dev, "missing platform data");
-		return -ENXIO;
-	}
+	int ret = 0;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
@@ -468,9 +460,7 @@ static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
 		return PTR_ERR(s3c24xx_i2s.regs);
 
 	s3c24xx_i2s_pcm_stereo_out.addr = res->start + S3C2410_IISFIFO;
-	s3c24xx_i2s_pcm_stereo_out.filter_data = pdata->dma_playback;
 	s3c24xx_i2s_pcm_stereo_in.addr = res->start + S3C2410_IISFIFO;
-	s3c24xx_i2s_pcm_stereo_in.filter_data = pdata->dma_capture;
 
 	ret = devm_snd_soc_register_component(&pdev->dev,
 			&s3c24xx_i2s_component, &s3c24xx_i2s_dai, 1);
@@ -479,8 +469,7 @@ static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = samsung_asoc_dma_platform_register(&pdev->dev,
-						 pdata->dma_filter,
+	ret = samsung_asoc_dma_platform_register(&pdev->dev, NULL,
 						 NULL, NULL);
 	if (ret)
 		pr_err("failed to register the dma: %d\n", ret);
-- 
1.9.1

[PATCH 3/3] ASoC: samsung: s3c24xx-i2s: Debug/error trace cleanup

[Sylwester Nawrocki]

pr_err() are replaced with dev_err() so information about
device the error logs refer to is also included.

pr_debug() at beginning of each function are removed
as they are likely very rarely used and can always be
added again when doing any serious debugging.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
 sound/soc/samsung/s3c24xx-i2s.c | 30 ++++--------------------------
 1 file changed, 4 insertions(+), 26 deletions(-)

diff --git a/sound/soc/samsung/s3c24xx-i2s.c b/sound/soc/samsung/s3c24xx-i2s.c
index 29196a9..7c7061b 100644
--- a/sound/soc/samsung/s3c24xx-i2s.c
+++ b/sound/soc/samsung/s3c24xx-i2s.c
@@ -54,8 +54,6 @@ static void s3c24xx_snd_txctrl(int on)
 	u32 iiscon;
 	u32 iismod;
 
-	pr_debug("Entered %s\n", __func__);
-
 	iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
 	iiscon  = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
 	iismod  = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
@@ -99,8 +97,6 @@ static void s3c24xx_snd_rxctrl(int on)
 	u32 iiscon;
 	u32 iismod;
 
-	pr_debug("Entered %s\n", __func__);
-
 	iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
 	iiscon  = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
 	iismod  = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
@@ -147,8 +143,6 @@ static int s3c24xx_snd_lrsync(void)
 	u32 iiscon;
 	int timeout = 50; /* 5ms */
 
-	pr_debug("Entered %s\n", __func__);
-
 	while (1) {
 		iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
 		if (iiscon & S3C2410_IISCON_LRINDEX)
@@ -167,8 +161,6 @@ static int s3c24xx_snd_lrsync(void)
  */
 static inline int s3c24xx_snd_is_clkmaster(void)
 {
-	pr_debug("Entered %s\n", __func__);
-
 	return (readl(s3c24xx_i2s.regs + S3C2410_IISMOD) & S3C2410_IISMOD_SLAVE) ? 0:1;
 }
 
@@ -180,8 +172,6 @@ static int s3c24xx_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
 {
 	u32 iismod;
 
-	pr_debug("Entered %s\n", __func__);
-
 	iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
 	pr_debug("hw_params r: IISMOD: %x \n", iismod);
 
@@ -209,6 +199,7 @@ static int s3c24xx_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
 
 	writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
 	pr_debug("hw_params w: IISMOD: %x \n", iismod);
+
 	return 0;
 }
 
@@ -219,8 +210,6 @@ static int s3c24xx_i2s_hw_params(struct snd_pcm_substream *substream,
 	struct snd_dmaengine_dai_dma_data *dma_data;
 	u32 iismod;
 
-	pr_debug("Entered %s\n", __func__);
-
 	dma_data = snd_soc_dai_get_dma_data(dai, substream);
 
 	/* Working copies of register */
@@ -242,6 +231,7 @@ static int s3c24xx_i2s_hw_params(struct snd_pcm_substream *substream,
 
 	writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
 	pr_debug("hw_params w: IISMOD: %x\n", iismod);
+
 	return 0;
 }
 
@@ -250,8 +240,6 @@ static int s3c24xx_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 {
 	int ret = 0;
 
-	pr_debug("Entered %s\n", __func__);
-
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
@@ -293,8 +281,6 @@ static int s3c24xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
 {
 	u32 iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
 
-	pr_debug("Entered %s\n", __func__);
-
 	iismod &= ~S3C2440_IISMOD_MPLL;
 
 	switch (clk_id) {
@@ -319,8 +305,6 @@ static int s3c24xx_i2s_set_clkdiv(struct snd_soc_dai *cpu_dai,
 {
 	u32 reg;
 
-	pr_debug("Entered %s\n", __func__);
-
 	switch (div_id) {
 	case S3C24XX_DIV_BCLK:
 		reg = readl(s3c24xx_i2s.regs + S3C2410_IISMOD) & ~S3C2410_IISMOD_FS_MASK;
@@ -354,8 +338,6 @@ u32 s3c24xx_i2s_get_clockrate(void)
 
 static int s3c24xx_i2s_probe(struct snd_soc_dai *dai)
 {
-	pr_debug("Entered %s\n", __func__);
-
 	snd_soc_dai_init_dma_data(dai, &s3c24xx_i2s_pcm_stereo_out,
 					&s3c24xx_i2s_pcm_stereo_in);
 
@@ -381,8 +363,6 @@ static int s3c24xx_i2s_probe(struct snd_soc_dai *dai)
 #ifdef CONFIG_PM
 static int s3c24xx_i2s_suspend(struct snd_soc_dai *cpu_dai)
 {
-	pr_debug("Entered %s\n", __func__);
-
 	s3c24xx_i2s.iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
 	s3c24xx_i2s.iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
 	s3c24xx_i2s.iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
@@ -395,7 +375,6 @@ static int s3c24xx_i2s_suspend(struct snd_soc_dai *cpu_dai)
 
 static int s3c24xx_i2s_resume(struct snd_soc_dai *cpu_dai)
 {
-	pr_debug("Entered %s\n", __func__);
 	clk_prepare_enable(s3c24xx_i2s.iis_clk);
 
 	writel(s3c24xx_i2s.iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
@@ -410,7 +389,6 @@ static int s3c24xx_i2s_resume(struct snd_soc_dai *cpu_dai)
 #define s3c24xx_i2s_resume NULL
 #endif
 
-
 #define S3C24XX_I2S_RATES \
 	(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
 	SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
@@ -465,14 +443,14 @@ static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
 	ret = devm_snd_soc_register_component(&pdev->dev,
 			&s3c24xx_i2s_component, &s3c24xx_i2s_dai, 1);
 	if (ret) {
-		pr_err("failed to register the dai\n");
+		dev_err(&pdev->dev, "Failed to register the DAI\n");
 		return ret;
 	}
 
 	ret = samsung_asoc_dma_platform_register(&pdev->dev, NULL,
 						 NULL, NULL);
 	if (ret)
-		pr_err("failed to register the dma: %d\n", ret);
+		dev_err(&pdev->dev, "Failed to register the DMA: %d\n", ret);
 
 	return ret;
 }
-- 
1.9.1

Re: [alsa-devel] [PATCH 1/3] ASoC: Drop SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME flag

[Lars-Peter Clausen]

On 10/25/2016 12:56 PM, Sylwester Nawrocki wrote:
> Since commit 194c7dea00c68c1b1f8ff26304fa937a006f66dd
> "ASoC: dmaengine: add custom DMA config to snd_dmaengine_pcm_config"
> custom DMA channels can be also specified in chan_names[] field of
> struct snd_dmaengine_pcm_config.  This patch drops chan_name field
> of struct snd_dmaengine_dai_dma_data and makes soc-generic-dmaengine-pcm
> module using config->chan_names instead.  Remaining users of struct
> snd_dmaengine_dai_dma_data::chan_name are updated to not require
> that field.
> 
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

Nice patch. One nice-to-have change request, can you split this into two
patches, one which removes the last users and one patch which removes
support for it from the framework?

Having the new DMA map framework should also allow us to eventually remove
the channel request in dmaengine_pcm_new() once all users of filter
functions have gone.

[...]
> diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
> index 6cef397..f2d372d 100644
> --- a/sound/soc/soc-generic-dmaengine-pcm.c
> +++ b/sound/soc/soc-generic-dmaengine-pcm.c
> @@ -263,7 +263,6 @@ static int dmaengine_pcm_new(struct snd_soc_pcm_runtime *rtd)
>  	struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
>  	const struct snd_dmaengine_pcm_config *config = pcm->config;
>  	struct device *dev = rtd->platform->dev;
> -	struct snd_dmaengine_dai_dma_data *dma_data;
>  	struct snd_pcm_substream *substream;
>  	size_t prealloc_buffer_size;
>  	size_t max_buffer_size;
> @@ -284,12 +283,9 @@ static int dmaengine_pcm_new(struct snd_soc_pcm_runtime *rtd)
>  		if (!substream)
>  			continue;
>  
> -		dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
> -
> -		if (!pcm->chan[i] &&
> -		    (pcm->flags & SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME))
> +		if (!pcm->chan[i] && config->chan_names[i])
>  			pcm->chan[i] = dma_request_slave_channel(dev,
> -				dma_data->chan_name);
> +				config->chan_names[i]);

I think this can be removed altogether. The only reason why we did the
delayed request is because the name would have not been available when
initially trying to request the channel when the PCM device is registered.

>  
>  		if (!pcm->chan[i] && (pcm->flags & SND_DMAENGINE_PCM_FLAG_COMPAT)) {
>  			pcm->chan[i] = dmaengine_pcm_compat_request_channel(rtd,
> @@ -359,9 +355,7 @@ static int dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,
>  	const char *name;
>  	struct dma_chan *chan;
>  
> -	if ((pcm->flags & (SND_DMAENGINE_PCM_FLAG_NO_DT |
> -			   SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME)) ||
> -	    !dev->of_node)
> +	if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_NO_DT) || !dev->of_node)
>  		return 0;
>  
>  	if (config && config->dma_dev) {
> 

Re: [alsa-devel] [PATCH 1/3] ASoC: Drop SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME flag

[Sylwester Nawrocki]

On 10/25/2016 02:22 PM, Lars-Peter Clausen wrote:
> On 10/25/2016 12:56 PM, Sylwester Nawrocki wrote:
<...>
> Nice patch. One nice-to-have change request, can you split this into two
> patches, one which removes the last users and one patch which removes
> support for it from the framework?

OK, I've made such split, looks cleaner this way indeed.

> Having the new DMA map framework should also allow us to eventually remove
> the channel request in dmaengine_pcm_new() once all users of filter
> functions have gone.

I've started working on removing all DMA filter uses from sound/soc/samsung,
hopefully it's ready in coming or next kernel release.  I need to add couple
more DMA map tables and support for DMA slave map to the PL080 controller.

> [...]
>> @@ -284,12 +283,9 @@ static int dmaengine_pcm_new(struct snd_soc_pcm_runtime *rtd)
>>  		if (!substream)
>>  			continue;
>>  
>> -		dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
>> -
>> -		if (!pcm->chan[i] &&
>> -		    (pcm->flags & SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME))
>> +		if (!pcm->chan[i] && config->chan_names[i])
>>  			pcm->chan[i] = dma_request_slave_channel(dev,
>> -				dma_data->chan_name);
>> +				config->chan_names[i]);
> 
> I think this can be removed altogether. The only reason why we did the
> delayed request is because the name would have not been available when
> initially trying to request the channel when the PCM device is registered.

Thanks for the hint, I will remove that call in v2.  I suspected it might
not be necessary any more but was afraid a bit of introducing a breakage.

Now the patch will be basically a revert of

commit ea73b7ddf13548afd666373dc5e26ee7c812a3fe
ASoC: dmaengine: Support custom channel names

Applied "ASoC: samsung: s3c24xx-i2s: Debug/error trace cleanup" to the asoc tree

[Mark Brown]

The patch

   ASoC: samsung: s3c24xx-i2s: Debug/error trace cleanup

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 2ef9555bd13d00c63fdbe3cdca6ab0e2ded42695 Mon Sep 17 00:00:00 2001
From: Sylwester Nawrocki <s.nawrocki@samsung.com>
Date: Tue, 25 Oct 2016 17:08:41 +0200
Subject: [PATCH] ASoC: samsung: s3c24xx-i2s: Debug/error trace cleanup

pr_err() are replaced with dev_err() so information about
device the error logs refer to is also included.

pr_debug() at beginning of each function are removed
as they are likely very rarely used and can always be
added again when doing any serious debugging.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/samsung/s3c24xx-i2s.c | 30 ++++--------------------------
 1 file changed, 4 insertions(+), 26 deletions(-)

diff --git a/sound/soc/samsung/s3c24xx-i2s.c b/sound/soc/samsung/s3c24xx-i2s.c
index 29196a9933a6..7c7061bc0ded 100644
--- a/sound/soc/samsung/s3c24xx-i2s.c
+++ b/sound/soc/samsung/s3c24xx-i2s.c
@@ -54,8 +54,6 @@ static void s3c24xx_snd_txctrl(int on)
 	u32 iiscon;
 	u32 iismod;
 
-	pr_debug("Entered %s\n", __func__);
-
 	iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
 	iiscon  = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
 	iismod  = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
@@ -99,8 +97,6 @@ static void s3c24xx_snd_rxctrl(int on)
 	u32 iiscon;
 	u32 iismod;
 
-	pr_debug("Entered %s\n", __func__);
-
 	iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
 	iiscon  = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
 	iismod  = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
@@ -147,8 +143,6 @@ static int s3c24xx_snd_lrsync(void)
 	u32 iiscon;
 	int timeout = 50; /* 5ms */
 
-	pr_debug("Entered %s\n", __func__);
-
 	while (1) {
 		iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
 		if (iiscon & S3C2410_IISCON_LRINDEX)
@@ -167,8 +161,6 @@ static int s3c24xx_snd_lrsync(void)
  */
 static inline int s3c24xx_snd_is_clkmaster(void)
 {
-	pr_debug("Entered %s\n", __func__);
-
 	return (readl(s3c24xx_i2s.regs + S3C2410_IISMOD) & S3C2410_IISMOD_SLAVE) ? 0:1;
 }
 
@@ -180,8 +172,6 @@ static int s3c24xx_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
 {
 	u32 iismod;
 
-	pr_debug("Entered %s\n", __func__);
-
 	iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
 	pr_debug("hw_params r: IISMOD: %x \n", iismod);
 
@@ -209,6 +199,7 @@ static int s3c24xx_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
 
 	writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
 	pr_debug("hw_params w: IISMOD: %x \n", iismod);
+
 	return 0;
 }
 
@@ -219,8 +210,6 @@ static int s3c24xx_i2s_hw_params(struct snd_pcm_substream *substream,
 	struct snd_dmaengine_dai_dma_data *dma_data;
 	u32 iismod;
 
-	pr_debug("Entered %s\n", __func__);
-
 	dma_data = snd_soc_dai_get_dma_data(dai, substream);
 
 	/* Working copies of register */
@@ -242,6 +231,7 @@ static int s3c24xx_i2s_hw_params(struct snd_pcm_substream *substream,
 
 	writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
 	pr_debug("hw_params w: IISMOD: %x\n", iismod);
+
 	return 0;
 }
 
@@ -250,8 +240,6 @@ static int s3c24xx_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 {
 	int ret = 0;
 
-	pr_debug("Entered %s\n", __func__);
-
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
@@ -293,8 +281,6 @@ static int s3c24xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
 {
 	u32 iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
 
-	pr_debug("Entered %s\n", __func__);
-
 	iismod &= ~S3C2440_IISMOD_MPLL;
 
 	switch (clk_id) {
@@ -319,8 +305,6 @@ static int s3c24xx_i2s_set_clkdiv(struct snd_soc_dai *cpu_dai,
 {
 	u32 reg;
 
-	pr_debug("Entered %s\n", __func__);
-
 	switch (div_id) {
 	case S3C24XX_DIV_BCLK:
 		reg = readl(s3c24xx_i2s.regs + S3C2410_IISMOD) & ~S3C2410_IISMOD_FS_MASK;
@@ -354,8 +338,6 @@ EXPORT_SYMBOL_GPL(s3c24xx_i2s_get_clockrate);
 
 static int s3c24xx_i2s_probe(struct snd_soc_dai *dai)
 {
-	pr_debug("Entered %s\n", __func__);
-
 	snd_soc_dai_init_dma_data(dai, &s3c24xx_i2s_pcm_stereo_out,
 					&s3c24xx_i2s_pcm_stereo_in);
 
@@ -381,8 +363,6 @@ static int s3c24xx_i2s_probe(struct snd_soc_dai *dai)
 #ifdef CONFIG_PM
 static int s3c24xx_i2s_suspend(struct snd_soc_dai *cpu_dai)
 {
-	pr_debug("Entered %s\n", __func__);
-
 	s3c24xx_i2s.iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
 	s3c24xx_i2s.iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
 	s3c24xx_i2s.iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
@@ -395,7 +375,6 @@ static int s3c24xx_i2s_suspend(struct snd_soc_dai *cpu_dai)
 
 static int s3c24xx_i2s_resume(struct snd_soc_dai *cpu_dai)
 {
-	pr_debug("Entered %s\n", __func__);
 	clk_prepare_enable(s3c24xx_i2s.iis_clk);
 
 	writel(s3c24xx_i2s.iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
@@ -410,7 +389,6 @@ static int s3c24xx_i2s_resume(struct snd_soc_dai *cpu_dai)
 #define s3c24xx_i2s_resume NULL
 #endif
 
-
 #define S3C24XX_I2S_RATES \
 	(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
 	SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
@@ -465,14 +443,14 @@ static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
 	ret = devm_snd_soc_register_component(&pdev->dev,
 			&s3c24xx_i2s_component, &s3c24xx_i2s_dai, 1);
 	if (ret) {
-		pr_err("failed to register the dai\n");
+		dev_err(&pdev->dev, "Failed to register the DAI\n");
 		return ret;
 	}
 
 	ret = samsung_asoc_dma_platform_register(&pdev->dev, NULL,
 						 NULL, NULL);
 	if (ret)
-		pr_err("failed to register the dma: %d\n", ret);
+		dev_err(&pdev->dev, "Failed to register the DMA: %d\n", ret);
 
 	return ret;
 }
-- 
2.8.1

Applied "ASoC: samsung: s3c24xx-i2s: Don't use platform_data for DMA parameters" to the asoc tree

[Mark Brown]

The patch

   ASoC: samsung: s3c24xx-i2s: Don't use platform_data for DMA parameters

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From b57a089bd4213b5e33007f8293bf83a8b14e4729 Mon Sep 17 00:00:00 2001
From: Sylwester Nawrocki <s.nawrocki@samsung.com>
Date: Tue, 25 Oct 2016 17:08:40 +0200
Subject: [PATCH] ASoC: samsung: s3c24xx-i2s: Don't use platform_data for DMA
 parameters

Since the s3c24xx-dma is converted to use DMA map we can rely on the
DMA subsystem to match DMA channels and slave devices, rather than
passing DMA details from platform_data.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/samsung/s3c24xx-i2s.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/sound/soc/samsung/s3c24xx-i2s.c b/sound/soc/samsung/s3c24xx-i2s.c
index d59a47d8ca0f..29196a9933a6 100644
--- a/sound/soc/samsung/s3c24xx-i2s.c
+++ b/sound/soc/samsung/s3c24xx-i2s.c
@@ -30,8 +30,6 @@
 #include "dma.h"
 #include "s3c24xx-i2s.h"
 
-#include <linux/platform_data/asoc-s3c.h>
-
 static struct snd_dmaengine_dai_dma_data s3c24xx_i2s_pcm_stereo_out = {
 	.addr_width	= 2,
 };
@@ -449,14 +447,8 @@ static const struct snd_soc_component_driver s3c24xx_i2s_component = {
 
 static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
 {
-	int ret = 0;
 	struct resource *res;
-	struct s3c_audio_pdata *pdata = dev_get_platdata(&pdev->dev);
-
-	if (!pdata) {
-		dev_err(&pdev->dev, "missing platform data");
-		return -ENXIO;
-	}
+	int ret = 0;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
@@ -468,9 +460,7 @@ static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
 		return PTR_ERR(s3c24xx_i2s.regs);
 
 	s3c24xx_i2s_pcm_stereo_out.addr = res->start + S3C2410_IISFIFO;
-	s3c24xx_i2s_pcm_stereo_out.filter_data = pdata->dma_playback;
 	s3c24xx_i2s_pcm_stereo_in.addr = res->start + S3C2410_IISFIFO;
-	s3c24xx_i2s_pcm_stereo_in.filter_data = pdata->dma_capture;
 
 	ret = devm_snd_soc_register_component(&pdev->dev,
 			&s3c24xx_i2s_component, &s3c24xx_i2s_dai, 1);
@@ -479,8 +469,7 @@ static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = samsung_asoc_dma_platform_register(&pdev->dev,
-						 pdata->dma_filter,
+	ret = samsung_asoc_dma_platform_register(&pdev->dev, NULL,
 						 NULL, NULL);
 	if (ret)
 		pr_err("failed to register the dma: %d\n", ret);
-- 
2.8.1