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authorJohn Crispin <john@openwrt.org>2015-02-11 10:17:55 +0000
committerJohn Crispin <john@openwrt.org>2015-02-11 10:17:55 +0000
commit408c9696264f8e25e4e4f6410e93d2edd06e59dd (patch)
tree1c9e8fbacb1508e8561c43f87389edf02cfb0955 /target/linux/brcm2708/patches-3.18/0037-ASoC-wm8804-Implement-MCLK-configuration-options-add.patch
parentf90d9d486a8842077e68e90bba2b276ac1336bab (diff)
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brcm2708: update to v3.18
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> SVN-Revision: 44392
Diffstat (limited to 'target/linux/brcm2708/patches-3.18/0037-ASoC-wm8804-Implement-MCLK-configuration-options-add.patch')
-rwxr-xr-xtarget/linux/brcm2708/patches-3.18/0037-ASoC-wm8804-Implement-MCLK-configuration-options-add.patch45
1 files changed, 45 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-3.18/0037-ASoC-wm8804-Implement-MCLK-configuration-options-add.patch b/target/linux/brcm2708/patches-3.18/0037-ASoC-wm8804-Implement-MCLK-configuration-options-add.patch
new file mode 100755
index 0000000000..9796fc57b4
--- /dev/null
+++ b/target/linux/brcm2708/patches-3.18/0037-ASoC-wm8804-Implement-MCLK-configuration-options-add.patch
@@ -0,0 +1,45 @@
+From f33231bfe57c745235a346d5529a4bac717d925e 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 037/114] 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 | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/sound/soc/codecs/wm8804.c b/sound/soc/codecs/wm8804.c
+index 3addc5f..d060b23 100644
+--- a/sound/soc/codecs/wm8804.c
++++ b/sound/soc/codecs/wm8804.c
+@@ -278,6 +278,7 @@ static int wm8804_hw_params(struct snd_pcm_substream *substream,
+ blen = 0x1;
+ break;
+ case 24:
++ case 32:
+ blen = 0x2;
+ break;
+ default:
+@@ -624,7 +625,7 @@ static const struct snd_soc_dai_ops wm8804_dai_ops = {
+ };
+
+ #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 | \
+--
+1.8.3.2
+