mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-26 17:01:14 +00:00
49 lines
1.6 KiB
Diff
49 lines
1.6 KiB
Diff
|
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 = {
|