6.14-stable review patch. If anyone has any objections, please let me know.
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From: Olivier Moysan olivier.moysan@foss.st.com
[ Upstream commit cce34d113e2a592806abcdc02c7f8513775d8b20 ]
On MP2 SoCs SAI kernel clock rate is managed through stm32_sai_set_parent_rate() function. If the kernel clock rate was set previously to a low frequency, this frequency may be too low to support the newly requested audio stream rate. However the stm32_sai_rate_accurate() will only check accuracy against the maximum kernel clock rate. The function will return leaving the kernel clock rate unchanged. Add a check on minimal frequency requirement, to avoid this.
Fixes: 2cfe1ff22555 ("ASoC: stm32: sai: add stm32mp25 support") Signed-off-by: Olivier Moysan olivier.moysan@foss.st.com Link: https://patch.msgid.link/20250430165210.321273-3-olivier.moysan@foss.st.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/stm/stm32_sai_sub.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/sound/soc/stm/stm32_sai_sub.c b/sound/soc/stm/stm32_sai_sub.c index 5a5acc67569fe..d9c4266c8150d 100644 --- a/sound/soc/stm/stm32_sai_sub.c +++ b/sound/soc/stm/stm32_sai_sub.c @@ -447,7 +447,10 @@ static int stm32_sai_set_parent_rate(struct stm32_sai_sub_data *sai, * return immediately. */ sai_curr_rate = clk_get_rate(sai->sai_ck); - if (stm32_sai_rate_accurate(sai_ck_max_rate, sai_curr_rate)) + dev_dbg(&pdev->dev, "kernel clock rate: min [%u], max [%u], current [%u]", + sai_ck_min_rate, sai_ck_max_rate, sai_curr_rate); + if (stm32_sai_rate_accurate(sai_ck_max_rate, sai_curr_rate) && + sai_curr_rate >= sai_ck_min_rate) return 0;
/*