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ARM: dts: sun8i: a33: Drop audio codec oversampling rate to 128 fs

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The current oversampling rate of 512 means that for 48 kHz 16 bit
stereo, the MCLK is running at the same rate as the module clock,
so there is no head room to support higher sampling rates. The codec
however supports up to 192 kHz for playback.

This patch drops the oversampling rate from 512 to 128, so that 192 kHz
audio can be played back directly without downsampling. Ideally we
should be using different oversampling rates for different sampling
rates, but that's not possible without a platform-specific machine
driver.

Fixes: 870f1bd1f5 ("ARM: dts: sun8i: Add audio codec, dai and card for A33")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
This commit is contained in:
Chen-Yu Tsai 2018-12-05 18:11:52 +08:00 committed by Maxime Ripard
parent 82992cdf4a
commit 7ff33bd321
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1 changed files with 1 additions and 1 deletions
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arch/arm/boot/dts/sun8i-a33.dtsi
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@ -192,7 +192,7 @@ sound: sound {
simple-audio-card,format = "i2s";
simple-audio-card,frame-master = <&link_codec>;
simple-audio-card,bitclock-master = <&link_codec>;
simple-audio-card,mclk-fs = <512>;
simple-audio-card,mclk-fs = <128>;
simple-audio-card,aux-devs = <&codec_analog>;
simple-audio-card,routing =
"Left DAC", "AIF1 Slot 0 Left",