diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0085-ASoC-wm8804-MCLK-configuration-options-32-bit.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0085-ASoC-wm8804-MCLK-configuration-options-32-bit.patch | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0085-ASoC-wm8804-MCLK-configuration-options-32-bit.patch b/target/linux/brcm2708/patches-4.19/950-0085-ASoC-wm8804-MCLK-configuration-options-32-bit.patch new file mode 100644 index 0000000000..6d42b24dfa --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0085-ASoC-wm8804-MCLK-configuration-options-32-bit.patch @@ -0,0 +1,32 @@ +From 567ae821d7e3e4bcca95ac69847f23e9b4929570 Mon Sep 17 00:00:00 2001 +From: Daniel Matuschek <info@crazy-audio.com> +Date: Wed, 15 Jan 2014 21:41:23 +0100 +Subject: [PATCH 085/703] ASoC: wm8804: MCLK configuration options, 32-bit + +WM8804 can run with PLL frequencies of 256xfs and 128xfs for most sample +rates. At 192kHz only 128xfs is supported. The existing driver selects +128xfs automatically for some lower samples rates. By using an +additional mclk_div divider, it is now possible to control the +behaviour. This allows using 256xfs PLL frequency on all sample rates up +to 96kHz. It should allow lower jitter and better signal quality. The +behavior has to be controlled by the sound card driver, because some +sample frequency share the same setting. e.g. 192kHz and 96kHz use +24.576MHz master clock. The only difference is the MCLK divider. + +This also added support for 32bit data. + +Signed-off-by: Daniel Matuschek <daniel@matuschek.net> +--- + sound/soc/codecs/wm8804.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/sound/soc/codecs/wm8804.c ++++ b/sound/soc/codecs/wm8804.c +@@ -550,6 +550,7 @@ static const struct snd_soc_component_dr + .use_pmdown_time = 1, + .endianness = 1, + .non_legacy_dai_naming = 1, ++ .idle_bias_on = true, + }; + + const struct regmap_config wm8804_regmap_config = { |