From 2c84afb52ebea59e9862fcb8234126b7ae1d1960 Mon Sep 17 00:00:00 2001 From: Charles Keepax Date: Thu, 6 Apr 2017 13:52:12 +0100 Subject: [PATCH] ASoC: cs35l35: Improve power down time Shorten the time it takes to power down the amp by disabling the volume ramp whilst doing the final shutdown. The driver has already muted the amplifier at this stage so doing the volume ramp serves no purpose. Signed-off-by: Charles Keepax Acked-by: Brian Austin Signed-off-by: Mark Brown --- sound/soc/codecs/cs35l35.c | 8 ++++++++ sound/soc/codecs/cs35l35.h | 3 +++ 2 files changed, 11 insertions(+) diff --git a/sound/soc/codecs/cs35l35.c b/sound/soc/codecs/cs35l35.c index 9688274f7c90..1db07a6296a4 100644 --- a/sound/soc/codecs/cs35l35.c +++ b/sound/soc/codecs/cs35l35.c @@ -187,6 +187,10 @@ static int cs35l35_sdin_event(struct snd_soc_dapm_widget *w, regmap_update_bits(cs35l35->regmap, CS35L35_PWRCTL1, CS35L35_PDN_ALL_MASK, 1); + /* Already muted, so disable volume ramp for faster shutdown */ + regmap_update_bits(cs35l35->regmap, CS35L35_AMP_DIG_VOL_CTL, + CS35L35_AMP_DIGSFT_MASK, 0); + reinit_completion(&cs35l35->pdn_done); ret = wait_for_completion_timeout(&cs35l35->pdn_done, @@ -199,6 +203,10 @@ static int cs35l35_sdin_event(struct snd_soc_dapm_widget *w, regmap_update_bits(cs35l35->regmap, CS35L35_CLK_CTL1, CS35L35_MCLK_DIS_MASK, 1 << CS35L35_MCLK_DIS_SHIFT); + + regmap_update_bits(cs35l35->regmap, CS35L35_AMP_DIG_VOL_CTL, + CS35L35_AMP_DIGSFT_MASK, + 1 << CS35L35_AMP_DIGSFT_SHIFT); break; default: dev_err(codec->dev, "Invalid event = 0x%x\n", event); diff --git a/sound/soc/codecs/cs35l35.h b/sound/soc/codecs/cs35l35.h index 156d2f0e6fd8..54e9ac536b20 100644 --- a/sound/soc/codecs/cs35l35.h +++ b/sound/soc/codecs/cs35l35.h @@ -190,6 +190,9 @@ #define CS35L35_AMP_GAIN_ZC_MASK 0x10 #define CS35L35_AMP_GAIN_ZC_SHIFT 4 +#define CS35L35_AMP_DIGSFT_MASK 0x02 +#define CS35L35_AMP_DIGSFT_SHIFT 1 + /* CS35L35_SP_FMT_CTL3 */ #define CS35L35_SP_I2S_DRV_MASK 0x03 #define CS35L35_SP_I2S_DRV_SHIFT 0 -- 2.20.1