[V4,4/4] ASoC: fsl_asrc: Fix error with S24_3LE format bitstream in i.MX8
diff mbox series

Message ID b93ce3dced55bbad8e0b4b7e700cf394b1ae1551.1569296075.git.shengjiu.wang@nxp.com
State New
Headers show
Series
  • update supported sample format
Related show

Commit Message

Shengjiu Wang Sept. 24, 2019, 10:52 a.m. UTC
There is error "aplay: pcm_write:2023: write error: Input/output error"
on i.MX8QM/i.MX8QXP platform for S24_3LE format.

In i.MX8QM/i.MX8QXP, the DMA is EDMA, which don't support 24bit
sample, but we didn't add any constraint, that cause issues.

So we need to query the caps of dma, then update the hw parameters
according to the caps.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 sound/soc/fsl/fsl_asrc.c     |  4 +--
 sound/soc/fsl/fsl_asrc.h     |  3 ++
 sound/soc/fsl/fsl_asrc_dma.c | 59 +++++++++++++++++++++++++++++++-----
 3 files changed, 56 insertions(+), 10 deletions(-)

Comments

Nicolin Chen Sept. 24, 2019, 9:43 p.m. UTC | #1
On Tue, Sep 24, 2019 at 06:52:35PM +0800, Shengjiu Wang wrote:
> There is error "aplay: pcm_write:2023: write error: Input/output error"
> on i.MX8QM/i.MX8QXP platform for S24_3LE format.
> 
> In i.MX8QM/i.MX8QXP, the DMA is EDMA, which don't support 24bit
> sample, but we didn't add any constraint, that cause issues.
> 
> So we need to query the caps of dma, then update the hw parameters
> according to the caps.
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
> ---
>  sound/soc/fsl/fsl_asrc.c     |  4 +--
>  sound/soc/fsl/fsl_asrc.h     |  3 ++
>  sound/soc/fsl/fsl_asrc_dma.c | 59 +++++++++++++++++++++++++++++++-----
>  3 files changed, 56 insertions(+), 10 deletions(-)
> 
> @@ -270,12 +268,17 @@ static int fsl_asrc_dma_hw_free(struct snd_pcm_substream *substream)
>  
>  static int fsl_asrc_dma_startup(struct snd_pcm_substream *substream)
>  {
> +	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
>  	struct snd_soc_pcm_runtime *rtd = substream->private_data;
>  	struct snd_pcm_runtime *runtime = substream->runtime;
>  	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
> +	struct snd_dmaengine_dai_dma_data *dma_data;
>  	struct device *dev = component->dev;
>  	struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
>  	struct fsl_asrc_pair *pair;
> +	struct dma_chan *tmp_chan = NULL;
> +	u8 dir = tx ? OUT : IN;
> +	int ret = 0;
>  
>  	pair = kzalloc(sizeof(struct fsl_asrc_pair), GFP_KERNEL);

Sorry, I didn't catch it previously. We would need to release
this memory also for all error-out paths, as the code doesn't
have any error-out routine, prior to applying this change.

>  	if (!pair)
> @@ -285,11 +288,51 @@ static int fsl_asrc_dma_startup(struct snd_pcm_substream *substream)

> +	/* Request a dummy pair, which will be released later.
> +	 * Request pair function needs channel num as input, for this
> +	 * dummy pair, we just request "1" channel temporary.
> +	 */

"temporary" => "temporarily"

> +	ret = fsl_asrc_request_pair(1, pair);
> +	if (ret < 0) {
> +		dev_err(dev, "failed to request asrc pair\n");
> +		return ret;
> +	}
> +
> +	/* Request a dummy dma channel, which will be release later. */

"release" => "released"

Patch
diff mbox series

diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index 584badf956d2..0bf91a6f54b9 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -115,7 +115,7 @@  static void fsl_asrc_sel_proc(int inrate, int outrate,
  * within range [ANCA, ANCA+ANCB-1], depends on the channels of pair A
  * while pair A and pair C are comparatively independent.
  */
-static int fsl_asrc_request_pair(int channels, struct fsl_asrc_pair *pair)
+int fsl_asrc_request_pair(int channels, struct fsl_asrc_pair *pair)
 {
 	enum asrc_pair_index index = ASRC_INVALID_PAIR;
 	struct fsl_asrc *asrc_priv = pair->asrc_priv;
@@ -158,7 +158,7 @@  static int fsl_asrc_request_pair(int channels, struct fsl_asrc_pair *pair)
  *
  * It clears the resource from asrc_priv and releases the occupied channels.
  */
-static void fsl_asrc_release_pair(struct fsl_asrc_pair *pair)
+void fsl_asrc_release_pair(struct fsl_asrc_pair *pair)
 {
 	struct fsl_asrc *asrc_priv = pair->asrc_priv;
 	enum asrc_pair_index index = pair->index;
diff --git a/sound/soc/fsl/fsl_asrc.h b/sound/soc/fsl/fsl_asrc.h
index 38af485bdd22..2b57e8c53728 100644
--- a/sound/soc/fsl/fsl_asrc.h
+++ b/sound/soc/fsl/fsl_asrc.h
@@ -462,4 +462,7 @@  struct fsl_asrc {
 #define DRV_NAME "fsl-asrc-dai"
 extern struct snd_soc_component_driver fsl_asrc_component;
 struct dma_chan *fsl_asrc_get_dma_channel(struct fsl_asrc_pair *pair, bool dir);
+int fsl_asrc_request_pair(int channels, struct fsl_asrc_pair *pair);
+void fsl_asrc_release_pair(struct fsl_asrc_pair *pair);
+
 #endif /* _FSL_ASRC_H */
diff --git a/sound/soc/fsl/fsl_asrc_dma.c b/sound/soc/fsl/fsl_asrc_dma.c
index 01052a0808b0..3b87badb8f00 100644
--- a/sound/soc/fsl/fsl_asrc_dma.c
+++ b/sound/soc/fsl/fsl_asrc_dma.c
@@ -16,13 +16,11 @@ 
 
 #define FSL_ASRC_DMABUF_SIZE	(256 * 1024)
 
-static const struct snd_pcm_hardware snd_imx_hardware = {
+static struct snd_pcm_hardware snd_imx_hardware = {
 	.info = SNDRV_PCM_INFO_INTERLEAVED |
 		SNDRV_PCM_INFO_BLOCK_TRANSFER |
 		SNDRV_PCM_INFO_MMAP |
-		SNDRV_PCM_INFO_MMAP_VALID |
-		SNDRV_PCM_INFO_PAUSE |
-		SNDRV_PCM_INFO_RESUME,
+		SNDRV_PCM_INFO_MMAP_VALID,
 	.buffer_bytes_max = FSL_ASRC_DMABUF_SIZE,
 	.period_bytes_min = 128,
 	.period_bytes_max = 65535, /* Limited by SDMA engine */
@@ -270,12 +268,17 @@  static int fsl_asrc_dma_hw_free(struct snd_pcm_substream *substream)
 
 static int fsl_asrc_dma_startup(struct snd_pcm_substream *substream)
 {
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
+	struct snd_dmaengine_dai_dma_data *dma_data;
 	struct device *dev = component->dev;
 	struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
 	struct fsl_asrc_pair *pair;
+	struct dma_chan *tmp_chan = NULL;
+	u8 dir = tx ? OUT : IN;
+	int ret = 0;
 
 	pair = kzalloc(sizeof(struct fsl_asrc_pair), GFP_KERNEL);
 	if (!pair)
@@ -285,11 +288,51 @@  static int fsl_asrc_dma_startup(struct snd_pcm_substream *substream)
 
 	runtime->private_data = pair;
 
-	snd_pcm_hw_constraint_integer(substream->runtime,
-				      SNDRV_PCM_HW_PARAM_PERIODS);
-	snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
+	ret = snd_pcm_hw_constraint_integer(substream->runtime,
+					    SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0) {
+		dev_err(dev, "failed to set pcm hw params periods\n");
+		return ret;
+	}
 
-	return 0;
+	/* Request a dummy pair, which will be released later.
+	 * Request pair function needs channel num as input, for this
+	 * dummy pair, we just request "1" channel temporary.
+	 */
+	ret = fsl_asrc_request_pair(1, pair);
+	if (ret < 0) {
+		dev_err(dev, "failed to request asrc pair\n");
+		return ret;
+	}
+
+	/* Request a dummy dma channel, which will be release later. */
+	tmp_chan = fsl_asrc_get_dma_channel(pair, dir);
+	if (!tmp_chan) {
+		dev_err(dev, "failed to get dma channel\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+	/* Refine the snd_imx_hardware according to caps of DMA. */
+	ret = snd_dmaengine_pcm_refine_runtime_hwparams(substream,
+							dma_data,
+							&snd_imx_hardware,
+							tmp_chan);
+	if (ret < 0) {
+		dev_err(dev, "failed to refine runtime hwparams\n");
+		goto out;
+	}
+
+	ret = snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
+
+out:
+	if (tmp_chan)
+		dma_release_channel(tmp_chan);
+	fsl_asrc_release_pair(pair);
+
+	return ret;
 }
 
 static int fsl_asrc_dma_shutdown(struct snd_pcm_substream *substream)