[1/2] ASoC: samsung: Provide helper for DMA init

Commit Message

Mark Brown Nov. 12, 2013, 1:48 p.m. UTC

From: Mark Brown <[e-mail]>

In preparation for using the dmaengine helpers in ASoC rather than the
dmaengine wrappers for the Samsung API wrap the configuration of dma_data.
The dmaengine code expects different data to that used by the legacy API.

Signed-off-by: Mark Brown <[e-mail]>
---
 sound/soc/samsung/ac97.c | 51 +++++++++++++++---------------------------------
 sound/soc/samsung/dma.c  |  8 ++++++++
 sound/soc/samsung/dma.h  |  3 +++
 sound/soc/samsung/i2s.c  |  2 +-
 sound/soc/samsung/pcm.c  | 18 +++++++++--------
 5 files changed, 38 insertions(+), 44 deletions(-)

Comments

padma venkat Nov. 26, 2013, 5:24 a.m. UTC | #1

Hi Mark,

On Tue, Nov 12, 2013 at 7:18 PM, Mark Brown <[e-mail]> wrote:
> From: Mark Brown <[e-mail]>
>
> In preparation for using the dmaengine helpers in ASoC rather than the
> dmaengine wrappers for the Samsung API wrap the configuration of dma_data.
> The dmaengine code expects different data to that used by the legacy API.
>
> Signed-off-by: Mark Brown <[e-mail]>
> ---
>  sound/soc/samsung/ac97.c | 51 +++++++++++++++---------------------------------
>  sound/soc/samsung/dma.c  |  8 ++++++++
>  sound/soc/samsung/dma.h  |  3 +++
>  sound/soc/samsung/i2s.c  |  2 +-
>  sound/soc/samsung/pcm.c  | 18 +++++++++--------
>  5 files changed, 38 insertions(+), 44 deletions(-)
>

[snip]

> diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
> index a5cbdb4..67d9fa9 100644
> --- a/sound/soc/samsung/i2s.c
> +++ b/sound/soc/samsung/i2s.c
> @@ -963,7 +963,7 @@ static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
>         }
>         clk_prepare_enable(i2s->clk);
>
> -       snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
> +       samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);

we have to initialize the dma data for i2s secondary dai also
otherwise there is a crash in dmaengine_pcm_new during probe.

Thanks
Padma
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Mark Brown Nov. 26, 2013, 10:15 a.m. UTC | #2

On Tue, Nov 26, 2013 at 10:54:57AM +0530, Padma Venkat wrote:

> > -       snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
> > +       samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);

> we have to initialize the dma data for i2s secondary dai also
> otherwise there is a crash in dmaengine_pcm_new during probe.

This should be called when both DAIs are probed...  in any case, if this
is broken presumably the driver is already broken given that this is
just a substitution?  I've no systems capable of actually running audio
with the later DAIs.

Patch

diff --git a/sound/soc/samsung/ac97.c b/sound/soc/samsung/ac97.c
index 350ba23..4a88e36 100644
--- a/sound/soc/samsung/ac97.c
+++ b/sound/soc/samsung/ac97.c
@@ -221,24 +221,6 @@  static struct snd_ac97_bus_ops s3c_ac97_ops = {
 	.reset      = s3c_ac97_cold_reset,
 };
 
-static int s3c_ac97_hw_params(struct snd_pcm_substream *substream,
-				  struct snd_pcm_hw_params *params,
-				  struct snd_soc_dai *dai)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	struct s3c_dma_params *dma_data;
-
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-		dma_data = &s3c_ac97_pcm_out;
-	else
-		dma_data = &s3c_ac97_pcm_in;
-
-	snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
-
-	return 0;
-}
-
 static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
 				struct snd_soc_dai *dai)
 {
@@ -279,21 +261,6 @@  static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
 	return 0;
 }
 
-static int s3c_ac97_hw_mic_params(struct snd_pcm_substream *substream,
-				      struct snd_pcm_hw_params *params,
-				      struct snd_soc_dai *dai)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-		return -ENODEV;
-	else
-		snd_soc_dai_set_dma_data(cpu_dai, substream, &s3c_ac97_mic_in);
-
-	return 0;
-}
-
 static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream,
 				    int cmd, struct snd_soc_dai *dai)
 {
@@ -329,15 +296,27 @@  static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream,
 }
 
 static const struct snd_soc_dai_ops s3c_ac97_dai_ops = {
-	.hw_params	= s3c_ac97_hw_params,
 	.trigger	= s3c_ac97_trigger,
 };
 
 static const struct snd_soc_dai_ops s3c_ac97_mic_dai_ops = {
-	.hw_params	= s3c_ac97_hw_mic_params,
 	.trigger	= s3c_ac97_mic_trigger,
 };
 
+static int s3c_ac97_dai_probe(struct snd_soc_dai *dai)
+{
+	samsung_asoc_init_dma_data(dai, &s3c_ac97_pcm_out, &s3c_ac97_pcm_in);
+
+	return 0;
+}
+
+static int s3c_ac97_mic_dai_probe(struct snd_soc_dai *dai)
+{
+	samsung_asoc_init_dma_data(dai, NULL, &s3c_ac97_mic_in);
+
+	return 0;
+}
+
 static struct snd_soc_dai_driver s3c_ac97_dai[] = {
 	[S3C_AC97_DAI_PCM] = {
 		.name =	"samsung-ac97",
@@ -354,6 +333,7 @@  static struct snd_soc_dai_driver s3c_ac97_dai[] = {
 			.channels_max = 2,
 			.rates = SNDRV_PCM_RATE_8000_48000,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.probe = s3c_ac97_dai_probe,
 		.ops = &s3c_ac97_dai_ops,
 	},
 	[S3C_AC97_DAI_MIC] = {
@@ -365,6 +345,7 @@  static struct snd_soc_dai_driver s3c_ac97_dai[] = {
 			.channels_max = 1,
 			.rates = SNDRV_PCM_RATE_8000_48000,
 			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.probe = s3c_ac97_mic_dai_probe,
 		.ops = &s3c_ac97_mic_dai_ops,
 	},
 };
diff --git a/sound/soc/samsung/dma.c b/sound/soc/samsung/dma.c
index fe2748b..ee23194 100644
--- a/sound/soc/samsung/dma.c
+++ b/sound/soc/samsung/dma.c
@@ -441,6 +441,14 @@  static struct snd_soc_platform_driver samsung_asoc_platform = {
 	.pcm_free	= dma_free_dma_buffers,
 };
 
+void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
+				struct s3c_dma_params *playback,
+				struct s3c_dma_params *capture)
+{
+	snd_soc_dai_init_dma_data(dai, playback, capture);
+}
+EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data);
+
 int samsung_asoc_dma_platform_register(struct device *dev)
 {
 	return snd_soc_register_platform(dev, &samsung_asoc_platform);
diff --git a/sound/soc/samsung/dma.h b/sound/soc/samsung/dma.h
index 0e86315..fb09a1c 100644
--- a/sound/soc/samsung/dma.h
+++ b/sound/soc/samsung/dma.h
@@ -22,6 +22,9 @@  struct s3c_dma_params {
 	char *ch_name;
 };
 
+void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
+				struct s3c_dma_params *playback,
+				struct s3c_dma_params *capture);
 int samsung_asoc_dma_platform_register(struct device *dev);
 void samsung_asoc_dma_platform_unregister(struct device *dev);
 
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index a5cbdb4..67d9fa9 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -963,7 +963,7 @@  static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
 	}
 	clk_prepare_enable(i2s->clk);
 
-	snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
+	samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
 
 	if (other) {
 		other->addr = i2s->addr;
diff --git a/sound/soc/samsung/pcm.c b/sound/soc/samsung/pcm.c
index e54256f..6a5e4bf 100644
--- a/sound/soc/samsung/pcm.c
+++ b/sound/soc/samsung/pcm.c
@@ -275,7 +275,6 @@  static int s3c_pcm_hw_params(struct snd_pcm_substream *substream,
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(rtd->cpu_dai);
-	struct s3c_dma_params *dma_data;
 	void __iomem *regs = pcm->regs;
 	struct clk *clk;
 	int sclk_div, sync_div;
@@ -284,13 +283,6 @@  static int s3c_pcm_hw_params(struct snd_pcm_substream *substream,
 
 	dev_dbg(pcm->dev, "Entered %s\n", __func__);
 
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-		dma_data = pcm->dma_playback;
-	else
-		dma_data = pcm->dma_capture;
-
-	snd_soc_dai_set_dma_data(rtd->cpu_dai, substream, dma_data);
-
 	/* Strictly check for sample size */
 	switch (params_format(params)) {
 	case SNDRV_PCM_FORMAT_S16_LE:
@@ -461,10 +453,20 @@  static const struct snd_soc_dai_ops s3c_pcm_dai_ops = {
 	.set_fmt	= s3c_pcm_set_fmt,
 };
 
+static int s3c_pcm_dai_probe(struct snd_soc_dai *dai)
+{
+	struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(dai);
+
+	snd_soc_dai_init_dma_data(dai, pcm->dma_playback, pcm->dma_capture);
+
+	return 0;
+}
+
 #define S3C_PCM_RATES  SNDRV_PCM_RATE_8000_96000
 
 #define S3C_PCM_DAI_DECLARE			\
 	.symmetric_rates = 1,					\
+	.probe = s3c_pcm_dai_probe,				\
 	.ops = &s3c_pcm_dai_ops,				\
 	.playback = {						\
 		.channels_min	= 2,				\