[alsa-devel] [v2 1/3] ASoC: Intel: Fix cracking noise in rt5663 headphones for kabylake platform

[Harsha Priya]

This patch fixes the cracking noise in rt5663 headphones for kabylake platform
by calling the rt5663_sel_asrc_clk_src() for RT5663_AD_STEREO_FILTER as well.

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 a corresponding system clock for codec.
Calling this function helps select the 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 at intel.com>
---
 sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
index 3fe4a08..cfde894 100644
--- a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
+++ b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
@@ -319,7 +319,9 @@ static int kabylake_rt5663_hw_params(struct snd_pcm_substream *substream,
 	int ret;
 
 	/* 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);
-- 
1.9.1