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ASoC: stm32: sai: manage context in set_sysclk callback

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The mclk direction now needs to be specified in endpoint node with
"system-clock-direction-out" property. However some calls to the
set_sysclk callback, related to CPU DAI clock, result in unbalanced
calls to clock API.
The set_sysclk callback in STM32 SAI driver is intended only for mclk
management. So it is relevant to ensure that calls to set_sysclk are
related to mclk only.
Since the master clock is handled only at runtime, skip the calls to
set_sysclk in the initialization phase.

Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
Link: https://patch.msgid.link/20250916123118.84175-1-olivier.moysan@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Olivier Moysan
2025-09-16 14:31:18 +02:00
committed by Mark Brown
parent dc64b3d42c
commit 27fa1a8b28
1 changed files with 8 additions and 0 deletions
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8
sound/soc/stm/stm32_sai_sub.c
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@@ -672,6 +672,14 @@ static int stm32_sai_set_sysclk(struct snd_soc_dai *cpu_dai,
struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai);
int ret;
/*
* The mclk rate is determined at runtime from the audio stream rate.
* Skip calls to the set_sysclk callback that are not relevant during the
* initialization phase.
*/
if (!snd_soc_card_is_instantiated(cpu_dai->component->card))
return 0;
if (dir == SND_SOC_CLOCK_OUT && sai->sai_mclk) {
ret = stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX,
SAI_XCR1_NODIV,