Audio tuner is used to handle clock drift between 26M and APLL domain.
It's expected when abs(chg_cnt) equals to upper bound, tuner updates pcw setting automatically, and then abs(chg_cnt) decreases. In the stress test, we found abs(chg_cnt) possibly equals to 2 at the unexpected timing. This results in wrong pcw updating. Finally, abs(chg_cnt) will always be larger than upper bound,
As a result, we update the upper bound to 3 to handle the corner case.
Signed-off-by: Trevor Wu trevor.wu@mediatek.com --- sound/soc/mediatek/mt8195/mt8195-afe-clk.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/soc/mediatek/mt8195/mt8195-afe-clk.c b/sound/soc/mediatek/mt8195/mt8195-afe-clk.c index 2ee3872c83c3..9ca2cb8c8a9c 100644 --- a/sound/soc/mediatek/mt8195/mt8195-afe-clk.c +++ b/sound/soc/mediatek/mt8195/mt8195-afe-clk.c @@ -117,7 +117,7 @@ static struct mt8195_afe_tuner_cfg mt8195_afe_tuner_cfgs[MT8195_AUD_PLL_NUM] = { .upper_bound_reg = AFE_APLL_TUNER_CFG, .upper_bound_shift = 8, .upper_bound_maskbit = 0xff, - .upper_bound_default = 0x2, + .upper_bound_default = 0x3, }, [MT8195_AUD_PLL2] = { .id = MT8195_AUD_PLL2, @@ -135,7 +135,7 @@ static struct mt8195_afe_tuner_cfg mt8195_afe_tuner_cfgs[MT8195_AUD_PLL_NUM] = { .upper_bound_reg = AFE_APLL_TUNER_CFG1, .upper_bound_shift = 8, .upper_bound_maskbit = 0xff, - .upper_bound_default = 0x2, + .upper_bound_default = 0x3, }, [MT8195_AUD_PLL3] = { .id = MT8195_AUD_PLL3,