linux-kernel - [PATCH 1/2] ASoC: rt5640: Update MCLK rate in set

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Date:   Thu, 9 Feb 2023 20:06:56 +0530
From:   Sameer Pujar <spujar@...dia.com>
To:     <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <oder_chiou@...ltek.com>, <broonie@...nel.org>
CC:     <perex@...ex.cz>, <tiwai@...e.com>, <lgirdwood@...il.com>,
        <kuninori.morimoto.gx@...esas.com>, <devicetree@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <alsa-devel@...a-project.org>, Sameer Pujar <spujar@...dia.com>
Subject: [PATCH 1/2] ASoC: rt5640: Update MCLK rate in set_sysclk()

Simple-card/audio-graph-card drivers do not handle MCLK clock when it
is specified in the codec device node. The expectation here is that,
the codec should actually own up the MCLK clock and do necessary setup
in the driver.

This is inspired from,
commit dbf54a953435 ("ASoC: rt5659: Update MCLK rate in set_sysclk()").

Cc: Oder Chiou <oder_chiou@...ltek.com>
Signed-off-by: Sameer Pujar <spujar@...dia.com>
---
 sound/soc/codecs/rt5640.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/soc/codecs/rt5640.c b/sound/soc/codecs/rt5640.c
index 9e6341a..1392570 100644
--- a/sound/soc/codecs/rt5640.c
+++ b/sound/soc/codecs/rt5640.c
@@ -1838,9 +1838,14 @@ static int rt5640_set_dai_sysclk(struct snd_soc_dai *dai,
 	struct rt5640_priv *rt5640 = snd_soc_component_get_drvdata(component);
 	unsigned int reg_val = 0;
 	unsigned int pll_bit = 0;
+	int ret;
 
 	switch (clk_id) {
 	case RT5640_SCLK_S_MCLK:
+		ret = clk_set_rate(rt5640->mclk, freq);
+		if (ret)
+			return ret;
+
 		reg_val |= RT5640_SCLK_SRC_MCLK;
 		break;
 	case RT5640_SCLK_S_PLL1:
-- 
2.7.4