From: Giridhar Maruthy <giridhar.maruthy@linaro.org>
Date: Wed, 13 Jul 2011 11:22:06 +0000 (+0530)
Subject: ASoC: SAMSUNG: 24-bit audio playback on Exynos4210
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=b3d7615f2a012c5e589209d08e89c4116134c9f4;p=openwrt%2Fstaging%2Fblogic.git

ASoC: SAMSUNG: 24-bit audio playback on Exynos4210

Using 256fs or 512fs will result in distortion of 24-bit
audio samples. This is because the lrclk generated is not
proper. Using 384 fs generates proper output.

Signed-off-by: Giridhar Maruthy <giridhar.maruthy@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

diff --git a/sound/soc/samsung/smdk_wm8994.c b/sound/soc/samsung/smdk_wm8994.c
index e7c1009a1e1d..45fbe2b3727f 100644
--- a/sound/soc/samsung/smdk_wm8994.c
+++ b/sound/soc/samsung/smdk_wm8994.c
@@ -8,6 +8,7 @@
  */
 
 #include "../codecs/wm8994.h"
+#include <sound/pcm_params.h>
 
  /*
   * Default CFG switch settings to use this driver:
@@ -44,7 +45,9 @@ static int smdk_hw_params(struct snd_pcm_substream *substream,
 	int ret;
 
 	/* AIF1CLK should be >=3MHz for optimal performance */
-	if (params_rate(params) == 8000 || params_rate(params) == 11025)
+	if (params_format(params) == SNDRV_PCM_FORMAT_S24_LE)
+		pll_out = params_rate(params) * 384;
+	else if (params_rate(params) == 8000 || params_rate(params) == 11025)
 		pll_out = params_rate(params) * 512;
 	else
 		pll_out = params_rate(params) * 256;