[alsa-devel] [PATCH] ASoC: Support a wider range of sample rates on Speyside WM8962

[Mark Brown]

As we've only got one audio interface and it is symmetric we can just set
SYSCLK based on the sample rate requested by the application layer. Provide
a default so bypass paths work before audio playback.

Signed-off-by: Mark Brown <broonie at opensource.wolfsonmicro.com>
---
 sound/soc/samsung/speyside_wm8962.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound/soc/samsung/speyside_wm8962.c b/sound/soc/samsung/speyside_wm8962.c
index 3820a6b..98b28ea 100644
--- a/sound/soc/samsung/speyside_wm8962.c
+++ b/sound/soc/samsung/speyside_wm8962.c
@@ -16,6 +16,8 @@
 
 #include "../codecs/wm8962.h"
 
+static int sample_rate = 44100;
+
 static int speyside_wm8962_set_bias_level(struct snd_soc_card *card,
 					  struct snd_soc_dapm_context *dapm,
 					  enum snd_soc_bias_level level)
@@ -31,13 +33,13 @@ static int speyside_wm8962_set_bias_level(struct snd_soc_card *card,
 		if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
 			ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
 						  WM8962_FLL_MCLK, 32768,
-						  44100 * 512);
+						  sample_rate * 512);
 			if (ret < 0)
 				pr_err("Failed to start FLL: %d\n", ret);
 
 			ret = snd_soc_dai_set_sysclk(codec_dai,
 						     WM8962_SYSCLK_FLL,
-						     44100 * 512,
+						     sample_rate * 512,
 						     SND_SOC_CLOCK_IN);
 			if (ret < 0) {
 				pr_err("Failed to set SYSCLK: %d\n", ret);
@@ -109,6 +111,8 @@ static int speyside_wm8962_hw_params(struct snd_pcm_substream *substream,
 	if (ret < 0)
 		return ret;
 
+	sample_rate = params_rate(params);
+
 	return 0;
 }
 
-- 
1.7.6.3