From patchwork Tue Jun 2 10:53:33 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Fitzgerald X-Patchwork-Id: 6528261 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 234A5C0020 for ; Tue, 2 Jun 2015 10:57:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 06182204FB for ; Tue, 2 Jun 2015 10:57:00 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id 77A9D2053B for ; Tue, 2 Jun 2015 10:56:58 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 9FB84264F45; Tue, 2 Jun 2015 12:56:57 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [IPv6:::1]) by alsa0.perex.cz (Postfix) with ESMTP id CFD3526262A; Tue, 2 Jun 2015 12:56:07 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 281A62625FF; Tue, 2 Jun 2015 12:56:06 +0200 (CEST) Received: from opensource.wolfsonmicro.com (opensource.wolfsonmicro.com [80.75.67.52]) by alsa0.perex.cz (Postfix) with ESMTP id 91ACD26060C for ; Tue, 2 Jun 2015 12:55:39 +0200 (CEST) Received: from localhost.localdomain (unknown [213.128.236.226]) by opensource.wolfsonmicro.com (Postfix) with ESMTPSA id 2AFC63B40FE; Tue, 2 Jun 2015 11:55:38 +0100 (BST) From: Richard Fitzgerald To: broonie@kernel.org Date: Tue, 2 Jun 2015 11:53:33 +0100 Message-Id: <1433242416-14958-1-git-send-email-rf@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.7.2.5 Cc: alsa-devel@alsa-project.org, patches@opensource.wolfsonmicro.com, linux-kernel@vger.kernel.org, lgirdwood@gmail.com Subject: [alsa-devel] [PATCH v8 1/4] ASoC: arizona: Export functions to control subsystem DVFS X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP The WM5102 and WM8997 codecs have an internal dynamic clock booster. When this booster is active, the DCVDD voltage must be increased. If all the currently active audio paths can run with the root SYSCLK we can disable the booster, allowing us to turn down DCVDD voltage to save power. Previously this was being done by having the booster enable bit set as a side-effect of the LDO1 regulator driver, which is unexpected behaviour of a regulator and not compatible with using an external regulator. This patch exports functions to handle the booster enable and DCVDD voltage, with each relevant subsystem flagging whether it can currently run without the booster. Note that these subsystems are stateless and none of them are nestable, so there's no need for reference counting, we only need a simple boolean for each subsystem of whether their current condition could require the booster or will allow us to turn the codec down to lower operating power. Signed-off-by: Richard Fitzgerald --- sound/soc/codecs/arizona.c | 128 ++++++++++++++++++++++++++++++++++++++++++++ sound/soc/codecs/arizona.h | 13 +++++ sound/soc/codecs/wm5102.c | 12 +++-- sound/soc/codecs/wm8997.c | 11 +++- 4 files changed, 157 insertions(+), 7 deletions(-) diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c index eff4b4d..b2d8b04 100644 --- a/sound/soc/codecs/arizona.c +++ b/sound/soc/codecs/arizona.c @@ -851,6 +851,134 @@ int arizona_hp_ev(struct snd_soc_dapm_widget *w, } EXPORT_SYMBOL_GPL(arizona_hp_ev); +static int arizona_dvfs_enable(struct snd_soc_codec *codec) +{ + const struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec); + struct arizona *arizona = priv->arizona; + int ret; + + ret = regulator_set_voltage(arizona->dcvdd, 1800000, 1800000); + if (ret) { + dev_err(codec->dev, "Failed to boost DCVDD: %d\n", ret); + return ret; + } + + ret = regmap_update_bits(arizona->regmap, + ARIZONA_DYNAMIC_FREQUENCY_SCALING_1, + ARIZONA_SUBSYS_MAX_FREQ, + ARIZONA_SUBSYS_MAX_FREQ); + if (ret) { + dev_err(codec->dev, "Failed to enable subsys max: %d\n", ret); + regulator_set_voltage(arizona->dcvdd, 1200000, 1800000); + return ret; + } + + return 0; +} + +static int arizona_dvfs_disable(struct snd_soc_codec *codec) +{ + const struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec); + struct arizona *arizona = priv->arizona; + int ret; + + ret = regmap_update_bits(arizona->regmap, + ARIZONA_DYNAMIC_FREQUENCY_SCALING_1, + ARIZONA_SUBSYS_MAX_FREQ, 0); + if (ret) { + dev_err(codec->dev, "Failed to disable subsys max: %d\n", ret); + return ret; + } + + ret = regulator_set_voltage(arizona->dcvdd, 1200000, 1800000); + if (ret) { + dev_err(codec->dev, "Failed to unboost DCVDD: %d\n", ret); + return ret; + } + + return 0; +} + +int arizona_dvfs_up(struct snd_soc_codec *codec, unsigned int flags) +{ + struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec); + int ret = 0; + + mutex_lock(&priv->dvfs_lock); + + if (!priv->dvfs_cached && !priv->dvfs_reqs) { + ret = arizona_dvfs_enable(codec); + if (ret) + goto err; + } + + priv->dvfs_reqs |= flags; +err: + mutex_unlock(&priv->dvfs_lock); + return ret; +} +EXPORT_SYMBOL_GPL(arizona_dvfs_up); + +int arizona_dvfs_down(struct snd_soc_codec *codec, unsigned int flags) +{ + struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec); + unsigned int old_reqs; + int ret = 0; + + mutex_lock(&priv->dvfs_lock); + + old_reqs = priv->dvfs_reqs; + priv->dvfs_reqs &= ~flags; + + if (!priv->dvfs_cached && old_reqs && !priv->dvfs_reqs) + ret = arizona_dvfs_disable(codec); + + mutex_unlock(&priv->dvfs_lock); + return ret; +} +EXPORT_SYMBOL_GPL(arizona_dvfs_down); + +int arizona_dvfs_sysclk_ev(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm); + struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec); + int ret = 0; + + mutex_lock(&priv->dvfs_lock); + + switch (event) { + case SND_SOC_DAPM_POST_PMU: + if (priv->dvfs_reqs) + ret = arizona_dvfs_enable(codec); + + priv->dvfs_cached = false; + break; + case SND_SOC_DAPM_PRE_PMD: + /* We must ensure DVFS is disabled before the codec goes into + * suspend so that we are never in an illegal state of DVFS + * enabled without enough DCVDD + */ + priv->dvfs_cached = true; + + if (priv->dvfs_reqs) + ret = arizona_dvfs_disable(codec); + break; + default: + break; + } + + mutex_unlock(&priv->dvfs_lock); + return ret; +} +EXPORT_SYMBOL_GPL(arizona_dvfs_sysclk_ev); + +void arizona_init_dvfs(struct arizona_priv *priv) +{ + mutex_init(&priv->dvfs_lock); +} +EXPORT_SYMBOL_GPL(arizona_init_dvfs); + static unsigned int arizona_sysclk_48k_rates[] = { 6144000, 12288000, diff --git a/sound/soc/codecs/arizona.h b/sound/soc/codecs/arizona.h index 11ff899..e82ca21 100644 --- a/sound/soc/codecs/arizona.h +++ b/sound/soc/codecs/arizona.h @@ -60,6 +60,9 @@ #define ARIZONA_MAX_DAI 6 #define ARIZONA_MAX_ADSP 4 +#define ARIZONA_DVFS_SR1_RQ 0x001 +#define ARIZONA_DVFS_ADSP1_RQ 0x100 + struct arizona; struct wm_adsp; @@ -84,6 +87,10 @@ struct arizona_priv { unsigned int spk_ena:2; unsigned int spk_ena_pending:1; + + unsigned int dvfs_reqs; + struct mutex dvfs_lock; + bool dvfs_cached; }; #define ARIZONA_NUM_MIXER_INPUTS 103 @@ -245,6 +252,12 @@ struct arizona_fll { char clock_ok_name[ARIZONA_FLL_NAME_LEN]; }; +extern int arizona_dvfs_up(struct snd_soc_codec *codec, unsigned int flags); +extern int arizona_dvfs_down(struct snd_soc_codec *codec, unsigned int flags); +extern int arizona_dvfs_sysclk_ev(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event); +extern void arizona_init_dvfs(struct arizona_priv *priv); + extern int arizona_init_fll(struct arizona *arizona, int id, int base, int lock_irq, int ok_irq, struct arizona_fll *fll); extern int arizona_set_fll_refclk(struct arizona_fll *fll, int source, diff --git a/sound/soc/codecs/wm5102.c b/sound/soc/codecs/wm5102.c index 0c6d1bc..b73e3a3 100644 --- a/sound/soc/codecs/wm5102.c +++ b/sound/soc/codecs/wm5102.c @@ -605,12 +605,13 @@ static int wm5102_sysclk_ev(struct snd_soc_dapm_widget *w, regmap_write_async(regmap, patch[i].reg, patch[i].def); break; - - default: + case SND_SOC_DAPM_PRE_PMD: break; + default: + return 0; } - return 0; + return arizona_dvfs_sysclk_ev(w, kcontrol, event); } static int wm5102_out_comp_coeff_get(struct snd_kcontrol *kcontrol, @@ -1036,7 +1037,8 @@ static const struct snd_kcontrol_new wm5102_aec_loopback_mux = static const struct snd_soc_dapm_widget wm5102_dapm_widgets[] = { SND_SOC_DAPM_SUPPLY("SYSCLK", ARIZONA_SYSTEM_CLOCK_1, ARIZONA_SYSCLK_ENA_SHIFT, - 0, wm5102_sysclk_ev, SND_SOC_DAPM_POST_PMU), + 0, wm5102_sysclk_ev, + SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), SND_SOC_DAPM_SUPPLY("ASYNCCLK", ARIZONA_ASYNC_CLOCK_1, ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, NULL, 0), SND_SOC_DAPM_SUPPLY("OPCLK", ARIZONA_OUTPUT_SYSTEM_CLOCK, @@ -1909,6 +1911,8 @@ static int wm5102_probe(struct platform_device *pdev) wm5102->core.arizona = arizona; wm5102->core.num_inputs = 6; + arizona_init_dvfs(&wm5102->core); + wm5102->core.adsp[0].part = "wm5102"; wm5102->core.adsp[0].num = 1; wm5102->core.adsp[0].type = WMFW_ADSP2; diff --git a/sound/soc/codecs/wm8997.c b/sound/soc/codecs/wm8997.c index a4d1177..2a129dc 100644 --- a/sound/soc/codecs/wm8997.c +++ b/sound/soc/codecs/wm8997.c @@ -106,11 +106,13 @@ static int wm8997_sysclk_ev(struct snd_soc_dapm_widget *w, regmap_write_async(regmap, patch[i].reg, patch[i].def); break; - default: + case SND_SOC_DAPM_PRE_PMD: break; + default: + return 0; } - return 0; + return arizona_dvfs_sysclk_ev(w, kcontrol, event); } static const char *wm8997_osr_text[] = { @@ -409,7 +411,8 @@ static const struct snd_kcontrol_new wm8997_aec_loopback_mux = static const struct snd_soc_dapm_widget wm8997_dapm_widgets[] = { SND_SOC_DAPM_SUPPLY("SYSCLK", ARIZONA_SYSTEM_CLOCK_1, ARIZONA_SYSCLK_ENA_SHIFT, - 0, wm8997_sysclk_ev, SND_SOC_DAPM_POST_PMU), + 0, wm8997_sysclk_ev, + SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), SND_SOC_DAPM_SUPPLY("ASYNCCLK", ARIZONA_ASYNC_CLOCK_1, ARIZONA_ASYNC_CLK_ENA_SHIFT, 0, NULL, 0), SND_SOC_DAPM_SUPPLY("OPCLK", ARIZONA_OUTPUT_SYSTEM_CLOCK, @@ -1126,6 +1129,8 @@ static int wm8997_probe(struct platform_device *pdev) wm8997->core.arizona = arizona; wm8997->core.num_inputs = 4; + arizona_init_dvfs(&wm8997->core); + for (i = 0; i < ARRAY_SIZE(wm8997->fll); i++) wm8997->fll[i].vco_mult = 1;