On 07/08/2013 03:29 PM, Richard Genoud wrote:
[...]

+/*
+ * Logic for a wm8731 as connected on a at91sam9x5 based board.
+ */
+static int at91sam9x5ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
+{

[...]

+	codec_dai->driver->playback.rates &= SNDRV_PCM_RATE_8000 |
+		SNDRV_PCM_RATE_32000 |
+		SNDRV_PCM_RATE_48000 |
+		SNDRV_PCM_RATE_96000;
+	codec_dai->driver->capture.rates &= SNDRV_PCM_RATE_8000 |
+		SNDRV_PCM_RATE_32000 |
+		SNDRV_PCM_RATE_48000 |
+		SNDRV_PCM_RATE_96000;

That's not right. The driver structure is shared between all instances of
the codec, a single instance should not modify it. If you need to constrain
the list of supported rates use snd_pcm_hw_constraint_list().

+
+	/* set the codec system clock for DAC and ADC */
+	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
+				     MCLK_RATE, SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		dev_err(dev, "ASoC: Failed to set WM8731 SYSCLK: %d\n", ret);
+		return ret;
+	}
+
+	/* signal a DAPM event */
+	snd_soc_dapm_sync(dapm);

This should not be necessary.

+	return 0;
+}