diff options
Diffstat (limited to 'target/linux/brcm2708/patches-3.18/0037-ASoC-wm8804-Implement-MCLK-configuration-options-add.patch')
| -rwxr-xr-x | target/linux/brcm2708/patches-3.18/0037-ASoC-wm8804-Implement-MCLK-configuration-options-add.patch | 45 |
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 + |