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49 lines
1.6 KiB
Diff
49 lines
1.6 KiB
Diff
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From b84b8a9ad2046a855a7044b6368def01ddd5de6e Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Fri, 21 Jul 2023 16:50:56 +0100
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Subject: [PATCH] rpi sound cards: Fix Codec Zero rate switching
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The Raspberry Pi Codec Zero (and IQaudIO Codec) don't notify the DA7213
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codec when it needs to change PLL frequencies. As a result, audio can
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be played at the wrong rate - play a 48kHz sound immediately after a
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44.1kHz sound to see the effect, but in some configurations the codec
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can lock into the wrong state and always get some rates wrong.
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Add the necessary notification to fix the issue.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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sound/soc/bcm/iqaudio-codec.c | 7 +++++--
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1 file changed, 5 insertions(+), 2 deletions(-)
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--- a/sound/soc/bcm/iqaudio-codec.c
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+++ b/sound/soc/bcm/iqaudio-codec.c
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@@ -143,6 +143,7 @@ static int snd_rpi_iqaudio_codec_hw_para
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
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unsigned int samplerate = params_rate(params);
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switch (samplerate) {
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@@ -152,15 +153,17 @@ static int snd_rpi_iqaudio_codec_hw_para
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case 48000:
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case 96000:
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pll_out = DA7213_PLL_FREQ_OUT_98304000;
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- return 0;
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+ break;
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case 44100:
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case 88200:
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pll_out = DA7213_PLL_FREQ_OUT_90316800;
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- return 0;
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+ break;
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default:
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dev_err(rtd->dev,"Unsupported samplerate %d\n", samplerate);
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return -EINVAL;
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}
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+
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+ return snd_soc_dai_set_pll(codec_dai, 0, DA7213_SYSCLK_PLL, 0, pll_out);
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}
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static const struct snd_soc_ops snd_rpi_iqaudio_codec_ops = {
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