From: Harsha Priya N <harshapriya.n@xxxxxxxxx> Patch fixes cracking noise in rt5663 headphones for kbl platform by calling rt5663_sel_asrc_clk_src() for RT5663_AD_STEREO_FILTER to set ASRC. The ASRC function is for asynchronous MCLK and LRCK. For RT5663 ASRC should be enabled to support special i2s clock format like Intel's 100fs. ASRC function will track i2s clock and generate corresponding system clock for codec. Calling this func helps select clock source for both RT5663_AD_STEREO_FILTER and RT5663_DA_STEREO_FILTER filters which fixes the crackling sound. Signed-off-by: Harsha Priya <harshapriya.n@xxxxxxxxx> Signed-off-by: Shruthi Sudhakar <shruthi.sudhakar@xxxxxxxxx> Signed-off-by: Naveen M <naveen.m@xxxxxxxxx> diff --git a/sound/soc/intel/boards/kbl_rt5663_max98927.c b/sound/soc/intel/boards/kbl_rt5663_max98927.c index f9ba977..29b50e4 100644 --- a/sound/soc/intel/boards/kbl_rt5663_max98927.c +++ b/sound/soc/intel/boards/kbl_rt5663_max98927.c @@ -312,11 +312,13 @@ static int kabylake_rt5663_hw_params(struct snd_pcm_substream *substream, struct snd_soc_dai *codec_dai = rtd->codec_dai; int ret; - ret = snd_soc_dai_set_sysclk(codec_dai, - RT5663_SCLK_S_MCLK, 24576000, SND_SOC_CLOCK_IN); /* use ASRC for internal clocks, as PLL rate isn't multiple of BCLK */ - rt5663_sel_asrc_clk_src(codec_dai->codec, RT5663_DA_STEREO_FILTER, 1); + rt5663_sel_asrc_clk_src(codec_dai->codec, + RT5663_DA_STEREO_FILTER | RT5663_AD_STEREO_FILTER, + RT5663_CLK_SEL_I2S1_ASRC); + ret = snd_soc_dai_set_sysclk(codec_dai, + RT5663_SCLK_S_MCLK, 24576000, SND_SOC_CLOCK_IN); if (ret < 0) dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n", ret); -- 1.9.1 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
