From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Mack Subject: [PATCH 2/2] ALSA: ASoC: ak4104: correct tranceiver enable handling Date: Wed, 6 Mar 2013 22:22:16 +0100 Message-ID: <1362604936-13624-2-git-send-email-zonque@gmail.com> References: <1362604936-13624-1-git-send-email-zonque@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail.zonque.de (svenfoo.org [82.94.215.22]) by alsa0.perex.cz (Postfix) with ESMTP id 1AF42260305 for ; Wed, 6 Mar 2013 22:22:24 +0100 (CET) In-Reply-To: <1362604936-13624-1-git-send-email-zonque@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org Cc: broonie@opensource.wolfsonmicro.com, lgirdwood@gmail.com, Daniel Mack List-Id: alsa-devel@alsa-project.org Move the enabling of the TX diode to hw_params() and disable it again in hw_free(). This way, the diode is only switched on as long as it needs to be. Signed-off-by: Daniel Mack --- sound/soc/codecs/ak4104.c | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/ak4104.c b/sound/soc/codecs/ak4104.c index 58f390d..c7cfdf9 100644 --- a/sound/soc/codecs/ak4104.c +++ b/sound/soc/codecs/ak4104.c @@ -93,7 +93,7 @@ static int ak4104_hw_params(struct snd_pcm_substream *substream, { struct snd_soc_codec *codec = dai->codec; struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec); - int val = 0; + int ret, val = 0; /* set the IEC958 bits: consumer mode, no copyright bit */ val |= IEC958_AES0_CON_NOT_COPYRIGHT; @@ -134,11 +134,33 @@ static int ak4104_hw_params(struct snd_pcm_substream *substream, return -EINVAL; } - return regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val); + ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val); + if (ret < 0) + return ret; + + /* enable transmitter */ + ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX, + AK4104_TX_TXE, AK4104_TX_TXE); + if (ret < 0) + return ret; + + return 0; +} + +static int ak4104_hw_free(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_codec *codec = dai->codec; + struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec); + + /* disable transmitter */ + return regmap_update_bits(ak4104->regmap, AK4104_REG_TX, + AK4104_TX_TXE, 0); } static const struct snd_soc_dai_ops ak4101_dai_ops = { .hw_params = ak4104_hw_params, + .hw_free = ak4104_hw_free, .set_fmt = ak4104_set_dai_fmt, }; -- 1.8.1.4