rt5645_sel_asrc_clk_src(9)

💅 rt5645_sel_asrc_clk_src — the Kernel API Manual moment 🎀

okay so bestie, we're in the Kernel API Manual today and the star of the show is rt5645_sel_asrc_clk_src ✨ like literally the function that picks which ASRC clock source a whole lil squad of filters gets. it's giving clock-dispatch energy fr fr 💖

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🌸 NAME 🌸

rt5645_sel_asrc_clk_src — select ASRC clock source for a set of filters 🎀

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✨ SYNOPSIS ✨

int rt5645_sel_asrc_clk_src (struct snd_soc_component *component ,
unsigned int filter_mask , unsigned int clk_src );

like, that's the whole signature, no cap 👑

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🦋 ARGUMENTS 🦋

• component — the SoC audio component device 💜 like the codec's whole main-character self.
• filter_mask — mask of filters 🎯 the lil bitmask that says which filters we're talking about.
• clk_src — clock source ⏰ the vibe we're assigning them.

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🔥 DESCRIPTION 🔥

so the ASRC function? it's for asynchronous MCLK and LRCK 🙈 like when those two clocks are just not synced up and doing their own thing.

also — and this is the important part, bestie — since RT5645 can only support standard 32fs or 64fs i2s format, ASRC should be enabled to support special i2s clock format such as Intel's 100fs (100 * sampling rate) 😭 so if you need one of those fancy non-standard formats, ASRC is literally the moment.

the ASRC function will track i2s clock and generate a corresponding system clock for codec 🌀 like it follows the beat and drops a matching system clock for the codec. iconic behavior honestly.

this function provides an API to select the clock source for a set of filters specified by the mask 🎯 and the codec driver will turn on ASRC for these filters if ASRC is selected as their clock source 💫 so like, pick ASRC as the source for those filters and the driver handles the rest. slay.

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💀 SEE ALSO 💀

• Kernel file ./sound/soc/codecs/rt5645.c
• set_dmic_clk(9) 🎤

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and that's the whole page bestie, you ate that 🫶

this lil transmission came from ./sound/soc/codecs, dated October 2026, and no I will not be normal about it 💅