2019-08-09 17:50:30 +00:00
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From a8198b0a3da790941874ee60dbc5df59dc77c20d Mon Sep 17 00:00:00 2001
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2019-07-09 18:32:28 +00:00
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From: Daniel Matuschek <info@crazy-audio.com>
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Date: Wed, 15 Jan 2014 21:41:23 +0100
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2019-08-09 17:50:30 +00:00
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Subject: [PATCH 085/773] ASoC: wm8804: MCLK configuration options, 32-bit
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2019-07-09 18:32:28 +00:00
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WM8804 can run with PLL frequencies of 256xfs and 128xfs for most sample
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rates. At 192kHz only 128xfs is supported. The existing driver selects
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128xfs automatically for some lower samples rates. By using an
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additional mclk_div divider, it is now possible to control the
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behaviour. This allows using 256xfs PLL frequency on all sample rates up
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to 96kHz. It should allow lower jitter and better signal quality. The
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behavior has to be controlled by the sound card driver, because some
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sample frequency share the same setting. e.g. 192kHz and 96kHz use
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24.576MHz master clock. The only difference is the MCLK divider.
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This also added support for 32bit data.
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Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
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---
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sound/soc/codecs/wm8804.c | 1 +
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1 file changed, 1 insertion(+)
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--- a/sound/soc/codecs/wm8804.c
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+++ b/sound/soc/codecs/wm8804.c
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@@ -550,6 +550,7 @@ static const struct snd_soc_component_dr
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.use_pmdown_time = 1,
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.endianness = 1,
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.non_legacy_dai_naming = 1,
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+ .idle_bias_on = true,
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};
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const struct regmap_config wm8804_regmap_config = {
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