diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-6.1/950-0816-rpi-sound-cards-Fix-Codec-Zero-rate-switching.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-6.1/950-0816-rpi-sound-cards-Fix-Codec-Zero-rate-switching.patch | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-6.1/950-0816-rpi-sound-cards-Fix-Codec-Zero-rate-switching.patch b/target/linux/bcm27xx/patches-6.1/950-0816-rpi-sound-cards-Fix-Codec-Zero-rate-switching.patch new file mode 100644 index 0000000000..82a3c9ea5b --- /dev/null +++ b/target/linux/bcm27xx/patches-6.1/950-0816-rpi-sound-cards-Fix-Codec-Zero-rate-switching.patch @@ -0,0 +1,48 @@ +From b84b8a9ad2046a855a7044b6368def01ddd5de6e Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Fri, 21 Jul 2023 16:50:56 +0100 +Subject: [PATCH] rpi sound cards: Fix Codec Zero rate switching + +The Raspberry Pi Codec Zero (and IQaudIO Codec) don't notify the DA7213 +codec when it needs to change PLL frequencies. As a result, audio can +be played at the wrong rate - play a 48kHz sound immediately after a +44.1kHz sound to see the effect, but in some configurations the codec +can lock into the wrong state and always get some rates wrong. + +Add the necessary notification to fix the issue. + +Signed-off-by: Phil Elwell <phil@raspberrypi.com> +--- + sound/soc/bcm/iqaudio-codec.c | 7 +++++-- + 1 file changed, 5 insertions(+), 2 deletions(-) + +--- a/sound/soc/bcm/iqaudio-codec.c ++++ b/sound/soc/bcm/iqaudio-codec.c +@@ -143,6 +143,7 @@ static int snd_rpi_iqaudio_codec_hw_para + struct snd_pcm_hw_params *params) + { + struct snd_soc_pcm_runtime *rtd = substream->private_data; ++ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); + unsigned int samplerate = params_rate(params); + + switch (samplerate) { +@@ -152,15 +153,17 @@ static int snd_rpi_iqaudio_codec_hw_para + case 48000: + case 96000: + pll_out = DA7213_PLL_FREQ_OUT_98304000; +- return 0; ++ break; + case 44100: + case 88200: + pll_out = DA7213_PLL_FREQ_OUT_90316800; +- return 0; ++ break; + default: + dev_err(rtd->dev,"Unsupported samplerate %d\n", samplerate); + return -EINVAL; + } ++ ++ return snd_soc_dai_set_pll(codec_dai, 0, DA7213_SYSCLK_PLL, 0, pll_out); + } + + static const struct snd_soc_ops snd_rpi_iqaudio_codec_ops = { |