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SubjectApplied "ASoC: rk3399_gru_sound: Support 32, 44.1 and 88.2 kHz sample rates" to the asoc tree
The patch

ASoC: rk3399_gru_sound: Support 32, 44.1 and 88.2 kHz sample rates

has been applied to the asoc tree at for-5.3

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tree (usually sometime in the next 24 hours) and sent to Linus during
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From 30b233b1cb4291d39ca08a95566721e8a52e5ee3 Mon Sep 17 00:00:00 2001
From: Enric Balletbo i Serra <>
Date: Fri, 21 Jun 2019 17:58:08 +0200
Subject: [PATCH] ASoC: rk3399_gru_sound: Support 32, 44.1 and 88.2 kHz sample

According to the datasheet the max98357a also supports 32, 44.1 and
88.2 kHz sample rate. This support was also introduced recently by
commit fdf34366d324 ("ASoC: max98357a: add missing supported rates").

Actually the machine driver validates the supported sample rates but
this is not really needed because the component driver can all apply
whatever constraints are needed and do their own validation. So, remove
the checks from the machine driver as are not needed at all. This way,
we also support 32, 44.1 and 88.2 kHz sample rates and we get rid of the
errors like the below.

rk3399-gru-sound sound: rockchip_sound_max98357a_hw_params() doesn't support this sample rate: 44100
rk3399-gru-sound sound: ASoC: machine hw_params failed: -22

Signed-off-by: Enric Balletbo i Serra <>
Signed-off-by: Mark Brown <>
sound/soc/rockchip/rk3399_gru_sound.c | 14 +-------------
1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/sound/soc/rockchip/rk3399_gru_sound.c b/sound/soc/rockchip/rk3399_gru_sound.c
index 879069fc0b94..769d5795919c 100644
--- a/sound/soc/rockchip/rk3399_gru_sound.c
+++ b/sound/soc/rockchip/rk3399_gru_sound.c
@@ -66,19 +66,7 @@ static int rockchip_sound_max98357a_hw_params(struct snd_pcm_substream *substrea
unsigned int mclk;
int ret;

- /* max98357a supports these sample rates */
- switch (params_rate(params)) {
- case 8000:
- case 16000:
- case 48000:
- case 96000:
- mclk = params_rate(params) * SOUND_FS;
- break;
- default:
- dev_err(rtd->card->dev, "%s() doesn't support this sample rate: %d\n",
- __func__, params_rate(params));
- return -EINVAL;
- }
+ mclk = params_rate(params) * SOUND_FS;

ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, 0, mclk, 0);
if (ret) {
 \ /
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