openwrt/target/linux/brcm2708/patches-3.10/0187-Use-a-range-macro-for-Playback-Volume.patch
Florian Fainelli 6918ea2484 brcm2708: update 3.10 patches with raspberrypi/rpi-3.10.y of 27 Apr. 2014
Update the 3.10 rasperry patches by rebasing raspberry/rpi-3.10-y
against linux-stable/v3.10.49.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 42678
2014-09-27 19:10:51 +00:00

30 lines
1.1 KiB
Diff

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