From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933548AbcIVKLG (ORCPT ); Thu, 22 Sep 2016 06:11:06 -0400 Received: from mail-lf0-f48.google.com ([209.85.215.48]:33728 "EHLO mail-lf0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932795AbcIVKLF (ORCPT ); Thu, 22 Sep 2016 06:11:05 -0400 From: Nikita Yushchenko To: Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , Helen Koike , Lars-Peter Clausen , Sebastian Reichel , alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org Cc: Chris Healy , Nikita Yushchenko Subject: [PATCH] ASoC: tpa6130a2: fix volume setting when no stream is running Date: Thu, 22 Sep 2016 13:10:40 +0300 Message-Id: <1474539040-25347-1-git-send-email-nikita.yoush@cogentembedded.com> X-Mailer: git-send-email 2.1.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org After moving tpa6130a2 power management to DAPM, if chip can be physically powered off (either reset_gpio is defined, or regulator indeed removes power), then volume change no longer works unless chip is on due to a running stream. Fix that by entering regcache cache_only mode while chip is off. Move regcache calls to tpa6130a2_power() to get them at driver init time as well. Signed-off-by: Nikita Yushchenko --- sound/soc/codecs/tpa6130a2.c | 49 +++++++++++++++++++++++--------------------- 1 file changed, 26 insertions(+), 23 deletions(-) diff --git a/sound/soc/codecs/tpa6130a2.c b/sound/soc/codecs/tpa6130a2.c index f1ea052..3b6faed 100644 --- a/sound/soc/codecs/tpa6130a2.c +++ b/sound/soc/codecs/tpa6130a2.c @@ -52,7 +52,7 @@ struct tpa6130a2_data { static int tpa6130a2_power(struct tpa6130a2_data *data, bool enable) { - int ret; + int ret = 0, ret2; if (enable) { ret = regulator_enable(data->supply); @@ -64,20 +64,34 @@ static int tpa6130a2_power(struct tpa6130a2_data *data, bool enable) /* Power on */ if (data->power_gpio >= 0) gpio_set_value(data->power_gpio, 1); + + /* Sync registers */ + regcache_cache_only(data->regmap, false); + ret = regcache_sync(data->regmap); + if (ret != 0) { + dev_err(data->dev, + "Failed to sync registers: %d\n", ret); + goto regcache_sync_failed; + } } else { + /* Powered off device does not retain registers. While device + * is off, any register updates (i.e. volume changes) should + * happen in cache only. + */ + regcache_mark_dirty(data->regmap); +regcache_sync_failed: + regcache_cache_only(data->regmap, true); + /* Power off */ if (data->power_gpio >= 0) gpio_set_value(data->power_gpio, 0); - ret = regulator_disable(data->supply); - if (ret != 0) { + ret2 = regulator_disable(data->supply); + if (ret2 != 0) { dev_err(data->dev, - "Failed to disable supply: %d\n", ret); - return ret; + "Failed to disable supply: %d\n", ret2); + return ret ? ret : ret2; } - - /* device regs does not match the cache state anymore */ - regcache_mark_dirty(data->regmap); } return ret; @@ -88,25 +102,14 @@ static int tpa6130a2_power_event(struct snd_soc_dapm_widget *w, { struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm); struct tpa6130a2_data *data = snd_soc_component_get_drvdata(c); - int ret; - /* before widget power up */ if (SND_SOC_DAPM_EVENT_ON(event)) { - /* Turn on the chip */ - tpa6130a2_power(data, true); - /* Sync the registers */ - ret = regcache_sync(data->regmap); - if (ret < 0) { - dev_err(c->dev, "Failed to initialize chip\n"); - tpa6130a2_power(data, false); - return ret; - } - /* after widget power down */ + /* Before widget power up: turn chip on, sync registers */ + return tpa6130a2_power(data, true); } else { - tpa6130a2_power(data, false); + /* After widget power down: turn chip off */ + return tpa6130a2_power(data, false); } - - return 0; } /* -- 2.1.4