@@ -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;
@@ -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 */
@@ -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 */
@@ -276,6 +274,11 @@ static int fsl_asrc_dma_startup(struct snd_pcm_substream *substream)
struct device *dev = component->dev;
struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
struct fsl_asrc_pair *pair;
+ bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+ u8 dir = tx ? OUT : IN;
+ struct dma_chan *tmp_chan;
+ struct snd_dmaengine_dai_dma_data *dma_data;
+ int ret;
pair = kzalloc(sizeof(struct fsl_asrc_pair), GFP_KERNEL);
if (!pair)
@@ -285,9 +288,40 @@ 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;
+ }
+
+ /* Request a temp pair, which is release in the end */
+ ret = fsl_asrc_request_pair(1, pair);
+ if (ret < 0) {
+ dev_err(dev, "failed to request asrc pair\n");
+ return ret;
+ }
+
+ tmp_chan = fsl_asrc_get_dma_channel(pair, dir);
+ if (!tmp_chan) {
+ dev_err(dev, "can't get dma channel\n");
+ return -EINVAL;
+ }
+
+ dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+ ret = snd_dmaengine_pcm_set_runtime_hwparams(substream,
+ dma_data,
+ &snd_imx_hardware,
+ tmp_chan);
+ if (ret < 0) {
+ dev_err(dev, "failed to set runtime hwparams\n");
+ return ret;
+ }
+
+ dma_release_channel(tmp_chan);
+ fsl_asrc_release_pair(pair);
+
return 0;
}
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 | 48 ++++++++++++++++++++++++++++++------ 3 files changed, 46 insertions(+), 9 deletions(-) -- 2.21.0