diff options
Diffstat (limited to 'target/linux/brcm2708/patches-3.10/0187-Use-a-range-macro-for-Playback-Volume.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-3.10/0187-Use-a-range-macro-for-Playback-Volume.patch | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-3.10/0187-Use-a-range-macro-for-Playback-Volume.patch b/target/linux/brcm2708/patches-3.10/0187-Use-a-range-macro-for-Playback-Volume.patch new file mode 100644 index 0000000000..a990c5b181 --- /dev/null +++ b/target/linux/brcm2708/patches-3.10/0187-Use-a-range-macro-for-Playback-Volume.patch @@ -0,0 +1,29 @@ +From 13d82ae9cf856fd5b58c932181591a9a4fda8659 Mon Sep 17 00:00:00 2001 +From: Howard Mitchell <hm@hmbedded.co.uk> +Date: Fri, 28 Mar 2014 16:40:31 +0000 +Subject: [PATCH 187/196] Use a range macro for Playback Volume. + +This allows limiting the output gain to avoid clipping in the +DAC ouput stages. +--- + sound/soc/codecs/pcm512x.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c +index ed36a4a..5bc96ec 100644 +--- a/sound/soc/codecs/pcm512x.c ++++ b/sound/soc/codecs/pcm512x.c +@@ -240,8 +240,8 @@ static const struct soc_enum pcm512x_veds = + pcm512x_ramp_step_text); + + static const struct snd_kcontrol_new pcm512x_controls[] = { +-SOC_DOUBLE_R_TLV("Playback Digital Volume", PCM512x_DIGITAL_VOLUME_2, +- PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, digital_tlv), ++SOC_DOUBLE_R_RANGE_TLV("Playback Digital Volume", PCM512x_DIGITAL_VOLUME_2, ++ PCM512x_DIGITAL_VOLUME_3, 0, 48, 255, 1, digital_tlv), + SOC_DOUBLE("Playback Digital Switch", PCM512x_MUTE, PCM512x_RQML_SHIFT, + PCM512x_RQMR_SHIFT, 1, 1), + +-- +1.9.1 + |