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ASoC: rt5640: Handle 0Hz sysclk during stream shutdown

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Commit 2458adb8f9 ("SoC: simple-card-utils: set 0Hz to sysclk when
shutdown") sends a 0Hz sysclk request during stream shutdown to clear
codec rate constraints. The rt5640 codec forwards this 0Hz to
clk_set_rate(), which can cause clock controller firmware faults on
platforms where MCLK is SoC-driven (e.g. Tegra) and 0Hz falls below
the hardware minimum rate.

Handle the 0Hz case by clearing the internal sysclk state and
returning early, avoiding the invalid clk_set_rate() call.

Signed-off-by: Sheetal <sheetal@nvidia.com>
Link: https://patch.msgid.link/20260406090547.988966-1-sheetal@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sheetal 2026-04-06 09:05:47 +00:00 committed by Mark Brown
parent cba9ce8c1a
commit 247d1c1399
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GPG Key ID: 24D68B725D5487D0
1 changed files with 5 additions and 0 deletions
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5
sound/soc/codecs/rt5640.c
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@ -1838,6 +1838,11 @@ static int rt5640_set_dai_sysclk(struct snd_soc_dai *dai,
unsigned int pll_bit = 0;
int ret;
if (!freq) {
rt5640->sysclk = 0;
return 0;
}
switch (clk_id) {
case RT5640_SCLK_S_MCLK:
ret = clk_set_rate(rt5640->mclk, freq);