mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
50 lines
1.8 KiB
Diff
50 lines
1.8 KiB
Diff
|
From c137d8fd4fd6a01ca8afc140cab7d7c3c39f3f33 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] ASoC: wm8804: Implement MCLK configuration options, add 32bit
|
||
|
|
support 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 | 5 +++--
|
||
|
|
1 file changed, 3 insertions(+), 2 deletions(-)
|
||
|
|
|
||
|
|
--- a/sound/soc/codecs/wm8804.c
|
||
|
|
+++ b/sound/soc/codecs/wm8804.c
|
||
|
|
@@ -304,6 +304,7 @@ static int wm8804_hw_params(struct snd_p
|
||
|
|
blen = 0x1;
|
||
|
|
break;
|
||
|
|
case 24:
|
||
|
|
+ case 32:
|
||
|
|
blen = 0x2;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
@@ -515,7 +516,7 @@ static const struct snd_soc_dai_ops wm88
|
||
|
|
};
|
||
|
|
|
||
|
|
#define WM8804_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
|
||
|
|
- SNDRV_PCM_FMTBIT_S24_LE)
|
||
|
|
+ SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)
|
||
|
|
|
||
|
|
#define WM8804_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
|
||
|
|
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
|
||
|
|
@@ -543,7 +544,7 @@ static struct snd_soc_dai_driver wm8804_
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct snd_soc_codec_driver soc_codec_dev_wm8804 = {
|
||
|
|
- .idle_bias_off = true,
|
||
|
|
+ .idle_bias_off = false,
|
||
|
|
|
||
|
|
.component_driver = {
|
||
|
|
.dapm_widgets = wm8804_dapm_widgets,
|