From 1d22c337dc8f3a25638f7262e7bcb5729a34d140 Mon Sep 17 00:00:00 2001 From: Sylwester Nawrocki Date: Wed, 14 Mar 2018 17:41:13 +0100 Subject: [PATCH] ASoC: samsung: odroid: Fix 32000 sample rate handling In case of sample rates lower than 44100 currently there is too low MCLK frequency set for the CODEC. Playback fails with following errors: $ speaker-test -c2 -t sine -f 1500 -l2 -r 32000 Sine wave rate is 1500.0000Hz Rate set to 32000Hz (requested 32000Hz) Buffer size range from 128 to 131072 Period size range from 64 to 65536 Using max buffer size 131072 Periods = 4 Unable to set hw params for playback: Invalid argument Setting of hwparams failed: Invalid argument [ 497.883700] max98090 1-0010: Invalid master clock frequency To fix this the I2S root clock's frequency is increased, depending on sampling rate. Signed-off-by: Sylwester Nawrocki Acked-by: Krzysztof Kozlowski Signed-off-by: Mark Brown --- sound/soc/samsung/odroid.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/sound/soc/samsung/odroid.c b/sound/soc/samsung/odroid.c index 92d7508..e698e67 100644 --- a/sound/soc/samsung/odroid.c +++ b/sound/soc/samsung/odroid.c @@ -36,23 +36,26 @@ static int odroid_card_hw_params(struct snd_pcm_substream *substream, { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card); - unsigned int pll_freq, rclk_freq; + unsigned int pll_freq, rclk_freq, rfs; int ret; switch (params_rate(params)) { - case 32000: case 64000: - pll_freq = 131072006U; + pll_freq = 196608001U; + rfs = 384; break; case 44100: case 88200: case 176400: pll_freq = 180633609U; + rfs = 512; break; + case 32000: case 48000: case 96000: case 192000: pll_freq = 196608001U; + rfs = 512; break; default: return -EINVAL; @@ -67,7 +70,7 @@ static int odroid_card_hw_params(struct snd_pcm_substream *substream, * frequency values due to the EPLL output frequency not being exact * multiple of the audio sampling rate. */ - rclk_freq = params_rate(params) * 256 + 1; + rclk_freq = params_rate(params) * rfs + 1; ret = clk_set_rate(priv->sclk_i2s, rclk_freq); if (ret < 0) -- 2.7.4