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Diffstat (limited to 'sound/soc/fsl/fsl_asrc.c')
-rw-r--r--sound/soc/fsl/fsl_asrc.c33
1 files changed, 23 insertions, 10 deletions
diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index f545009a90d7..ab071ff968ca 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -262,7 +262,7 @@ static int fsl_asrc_set_ideal_ratio(struct fsl_asrc_pair *pair,
* of struct asrc_config which includes in/output sample rate, width, channel
* and clock settings.
*/
-static int fsl_asrc_config_pair(struct fsl_asrc_pair *pair)
+static int fsl_asrc_config_pair(struct fsl_asrc_pair *pair, bool p2p_in, bool p2p_out)
{
struct asrc_config *config = pair->config;
struct fsl_asrc *asrc_priv = pair->asrc_priv;
@@ -337,11 +337,17 @@ static int fsl_asrc_config_pair(struct fsl_asrc_pair *pair)
clk = asrc_priv->asrck_clk[clk_index[OUT]];
- /* Use fixed output rate for Ideal Ratio mode (INCLK_NONE) */
- if (ideal)
- div[OUT] = clk_get_rate(clk) / IDEAL_RATIO_RATE;
- else
+ /*
+ * When P2P mode, output rate should align with the out samplerate.
+ * if set too high output rate, there will be lots of Overload.
+ * When M2M mode, output rate should also need to align with the out
+ * samplerate, but M2M must use less time to achieve good performance.
+ */
+ if (p2p_out)
div[OUT] = clk_get_rate(clk) / outrate;
+ else
+ div[OUT] = clk_get_rate(clk) / IDEAL_RATIO_RATE;
+
if (div[OUT] == 0) {
pair_err("failed to support output sample rate %dHz by asrck_%x\n",
@@ -535,17 +541,24 @@ static int fsl_asrc_dai_hw_params(struct snd_pcm_substream *substream,
config.output_word_width = word_width;
config.input_sample_rate = rate;
config.output_sample_rate = asrc_priv->asrc_rate;
+
+ ret = fsl_asrc_config_pair(pair, false, true);
+ if (ret) {
+ dev_err(dai->dev, "fail to config asrc pair\n");
+ return ret;
+ }
+
} else {
config.input_word_width = word_width;
config.output_word_width = width;
config.input_sample_rate = asrc_priv->asrc_rate;
config.output_sample_rate = rate;
- }
- ret = fsl_asrc_config_pair(pair);
- if (ret) {
- dev_err(dai->dev, "fail to config asrc pair\n");
- return ret;
+ ret = fsl_asrc_config_pair(pair, true, false);
+ if (ret) {
+ dev_err(dai->dev, "fail to config asrc pair\n");
+ return ret;
+ }
}
return 0;