ASoC: SAMSUNG: 24-bit audio playback on Exynos4210

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Headers	show Return-Path: <patch+caf_=linaro-patchwork=canonical.com@linaro.org> Received-SPF: neutral (google.com: 209.85.161.44 is neither permitted nor denied by best guess record for domain of angus.ainslie@linaro.org) client-ip=209.85.161.44; MIME-Version: 1.0 In-Reply-To: <1310556126-13784-1-git-send-email-giridhar.maruthy@linaro.org> References: <1310556126-13784-1-git-send-email-giridhar.maruthy@linaro.org> Date: Fri, 15 Jul 2011 06:59:44 -0600 Message-ID: <CALxn3sVCmPmPjeA0U=+YE2pbo2pxxS5hJQK6PNNiy=popSDJjA@mail.gmail.com> Subject: Fwd: [PATCH] ASoC: SAMSUNG: 24-bit audio playback on Exynos4210 From: Angus Ainslie <angus.ainslie@linaro.org> To: Patch Tracking <patches@linaro.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

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Date: Fri, 15 Jul 2011 06:59:44 -0600
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Subject: Fwd: [PATCH] ASoC: SAMSUNG: 24-bit audio playback on Exynos4210
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Commit Message

Angus Ainslie July 15, 2011, 12:59 p.m. UTC

---------- Forwarded message ----------
From: Giridhar Maruthy <giridhar.maruthy@linaro.org>
Date: Wed, Jul 13, 2011 at 5:22 AM
Subject: [PATCH] ASoC: SAMSUNG: 24-bit audio playback on Exynos4210
To: naveenkrishna.ch@gmail.com, jassisinghbrar@gmail.com,
linux-samsung-soc@vger.kernel.org, dp@opensource.wolfsonmicro.com,
Kyung-Kwee.Ryu@wolfsonmicro.com, broonie@opensource.wolfsonmicro.com
Cc: Giridhar Maruthy <giridhar.maruthy@linaro.org>


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>
---
 sound/soc/samsung/smdk_wm8994.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

--
1.7.4.1

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diff --git a/sound/soc/samsung/smdk_wm8994.c b/sound/soc/samsung/smdk_wm8994.c
index e7c1009..45fbe2b 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;