From patchwork Fri Jan 21 12:04:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Fitzgerald X-Patchwork-Id: 534557 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 05DB8C433EF for ; Fri, 21 Jan 2022 12:06:08 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 14F5D2BBB; Fri, 21 Jan 2022 13:05:16 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 14F5D2BBB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1642766766; bh=Pnk51OoT4ei0IHi3D8oRAS13v8qIJas/mMugszKh1D8=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=jSnZtXuYn/lnZ34y6bvG8uxeFt97MIYQeIEHnEG1FUiUoJGva+48ID2AjtS82U6fQ TiRnkAZLWaZh/AZGHmQzZbMQrLlcbcxz9n/PIqCvdvjACv3iXybKGS1sze1oWZtfoU Y+Qn9om+Nv9ztoYt8M0Pqt5MyTLpiphFuQDVgikg= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 5186EF8028B; Fri, 21 Jan 2022 13:04:30 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id E39B6F80125; Fri, 21 Jan 2022 13:04:27 +0100 (CET) Received: from mx0b-001ae601.pphosted.com (mx0a-001ae601.pphosted.com [67.231.149.25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id A13FBF8028B for ; Fri, 21 Jan 2022 13:04:20 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz A13FBF8028B Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=cirrus.com header.i=@cirrus.com header.b="X6tqrPOy" Received: from pps.filterd (m0077473.ppops.net [127.0.0.1]) by mx0a-001ae601.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 20L4qraY012563; Fri, 21 Jan 2022 06:04:18 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=PODMain02222019; bh=BoNiG02pYsgRnqXR1vMPhv+H38ToRb/HQJp34J6qJug=; b=X6tqrPOyQt5Qya1dgBYg8p31ys16F4yCHmpcZrTp6yF09DEbVQ6hApRGvIkx3j2psNaL zTHfN42U6vmGJcdoafx57Kq0d9ddg8s1MVLyasfr9L3drH7Zc+Hsz82gvtWyJyIy35gD NHLqgrGcKYwxpIV/pizpMRWmlqovsoa97Co+isnvjvLU9WGWdtLEsNY6GKa/6gP8DV2A oNXLZBi/8+FLBnr7AFcZyX2A/bYWd1/NBP/a9oGbLdqphBnlAq1y0uWl1qMKrst+pAQ+ ibuII2hB+r1fA0yusZ4hrGstGZlsxQ6wz6gKOGBnHdXa1h3Yhp3tLYJYg9cVraTlncqB Iw== Received: from ediex01.ad.cirrus.com ([84.19.233.68]) by mx0a-001ae601.pphosted.com (PPS) with ESMTPS id 3dqhyq0nwd-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Fri, 21 Jan 2022 06:04:18 -0600 Received: from EDIEX01.ad.cirrus.com (198.61.84.80) by EDIEX01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.18; Fri, 21 Jan 2022 12:04:16 +0000 Received: from ediswmail.ad.cirrus.com (198.61.86.93) by EDIEX01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server id 15.1.2375.18 via Frontend Transport; Fri, 21 Jan 2022 12:04:16 +0000 Received: from AUSNPC0LSNW1-debian.cirrus.com (AUSNPC0LSNW1.ad.cirrus.com [198.61.65.33]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id B36A211D7; Fri, 21 Jan 2022 12:04:15 +0000 (UTC) From: Richard Fitzgerald To: Subject: [PATCH v2 3/3] ASoC: cs42l42: Handle system suspend Date: Fri, 21 Jan 2022 12:04:12 +0000 Message-ID: <20220121120412.672284-4-rf@opensource.cirrus.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220121120412.672284-1-rf@opensource.cirrus.com> References: <20220121120412.672284-1-rf@opensource.cirrus.com> MIME-Version: 1.0 X-Proofpoint-GUID: IXD6vLJAl8mTJyXki8EcMx2BOtvFpeEf X-Proofpoint-ORIG-GUID: IXD6vLJAl8mTJyXki8EcMx2BOtvFpeEf X-Proofpoint-Spam-Reason: safe Cc: patches@opensource.cirrus.com, alsa-devel@alsa-project.org, Richard Fitzgerald , linux-kernel@vger.kernel.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 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: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Add system suspend functions to handle clean power-down on suspend and restoring registers on resume. The jack state could change during suspend. Plug->unplug and unplug->plug are straightforward because this looks no different from any other plug state change - there will be a plugged or unplugged interrupt pending. The jack could be unplugged and a different type of jack plugged, and on resume the plug state would not have changed. Setting plug_state back to TS_TRANS (transitioning) will make the next plug interrupt after resume run a type detection. During system suspend any jack plug/unplug and button events will not be reported or generate a system wakeup. If the plug state or headset type has changed it will be reported after resume. Signed-off-by: Richard Fitzgerald --- sound/soc/codecs/cs42l42.c | 141 +++++++++++++++++++++++++++++++++++++++++++++ sound/soc/codecs/cs42l42.h | 5 ++ 2 files changed, 146 insertions(+) diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index f1b95d45af4a..db6ef6cdce15 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -1614,6 +1614,10 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data) int report = 0; mutex_lock(&cs42l42->irq_lock); + if (cs42l42->suspended) { + mutex_unlock(&cs42l42->irq_lock); + return IRQ_NONE; + } /* Read sticky registers to clear interurpt */ for (i = 0; i < ARRAY_SIZE(stickies); i++) { @@ -2047,6 +2051,138 @@ static int cs42l42_handle_device_data(struct device *dev, return 0; } +/* Datasheet suspend sequence */ +static const struct reg_sequence __maybe_unused cs42l42_shutdown_seq[] = { + REG_SEQ0(CS42L42_MIC_DET_CTL1, 0x9F), + REG_SEQ0(CS42L42_ADC_OVFL_INT_MASK, 0x01), + REG_SEQ0(CS42L42_MIXER_INT_MASK, 0x0F), + REG_SEQ0(CS42L42_SRC_INT_MASK, 0x0F), + REG_SEQ0(CS42L42_ASP_RX_INT_MASK, 0x1F), + REG_SEQ0(CS42L42_ASP_TX_INT_MASK, 0x0F), + REG_SEQ0(CS42L42_CODEC_INT_MASK, 0x03), + REG_SEQ0(CS42L42_SRCPL_INT_MASK, 0x7F), + REG_SEQ0(CS42L42_VPMON_INT_MASK, 0x01), + REG_SEQ0(CS42L42_PLL_LOCK_INT_MASK, 0x01), + REG_SEQ0(CS42L42_TSRS_PLUG_INT_MASK, 0x0F), + REG_SEQ0(CS42L42_WAKE_CTL, 0xE1), + REG_SEQ0(CS42L42_DET_INT1_MASK, 0xE0), + REG_SEQ0(CS42L42_DET_INT2_MASK, 0xFF), + REG_SEQ0(CS42L42_MIXER_CHA_VOL, 0x3F), + REG_SEQ0(CS42L42_MIXER_ADC_VOL, 0x3F), + REG_SEQ0(CS42L42_MIXER_CHB_VOL, 0x3F), + REG_SEQ0(CS42L42_HP_CTL, 0x0F), + REG_SEQ0(CS42L42_ASP_RX_DAI0_EN, 0x00), + REG_SEQ0(CS42L42_ASP_CLK_CFG, 0x00), + REG_SEQ0(CS42L42_HSDET_CTL2, 0x00), + REG_SEQ0(CS42L42_PWR_CTL1, 0xFE), + REG_SEQ0(CS42L42_PWR_CTL2, 0x8C), + REG_SEQ0(CS42L42_DAC_CTL2, 0x02), + REG_SEQ0(CS42L42_HS_CLAMP_DISABLE, 0x00), + REG_SEQ0(CS42L42_MISC_DET_CTL, 0x03), + REG_SEQ0(CS42L42_TIPSENSE_CTL, 0x02), + REG_SEQ0(CS42L42_HSBIAS_SC_AUTOCTL, 0x03), + REG_SEQ0(CS42L42_PWR_CTL1, 0xFF) +}; + +static int __maybe_unused cs42l42_suspend(struct device *dev) +{ + struct cs42l42_private *cs42l42 = dev_get_drvdata(dev); + unsigned int reg; + u8 save_regs[ARRAY_SIZE(cs42l42_shutdown_seq)]; + int i, ret; + + /* + * Wait for threaded irq handler to be idle and stop it processing + * future interrupts. This ensures a safe disable if the interrupt + * is shared. + */ + mutex_lock(&cs42l42->irq_lock); + cs42l42->suspended = true; + + /* Save register values that will be overwritten by shutdown sequence */ + for (i = 0; i < ARRAY_SIZE(cs42l42_shutdown_seq); ++i) { + regmap_read(cs42l42->regmap, cs42l42_shutdown_seq[i].reg, ®); + save_regs[i] = (u8)reg; + } + + /* Shutdown codec */ + regmap_multi_reg_write(cs42l42->regmap, + cs42l42_shutdown_seq, + ARRAY_SIZE(cs42l42_shutdown_seq)); + + /* All interrupt sources are now disabled */ + mutex_unlock(&cs42l42->irq_lock); + + /* Wait for power-down complete */ + msleep(CS42L42_PDN_DONE_TIME_MS); + ret = regmap_read_poll_timeout(cs42l42->regmap, + CS42L42_CODEC_STATUS, reg, + (reg & CS42L42_PDN_DONE_MASK), + CS42L42_PDN_DONE_POLL_US, + CS42L42_PDN_DONE_TIMEOUT_US); + if (ret) + dev_warn(dev, "Failed to get PDN_DONE: %d\n", ret); + + /* Discharge FILT+ */ + regmap_update_bits(cs42l42->regmap, CS42L42_PWR_CTL2, + CS42L42_DISCHARGE_FILT_MASK, CS42L42_DISCHARGE_FILT_MASK); + msleep(CS42L42_FILT_DISCHARGE_TIME_MS); + + regcache_cache_only(cs42l42->regmap, true); + gpiod_set_value_cansleep(cs42l42->reset_gpio, 0); + regulator_bulk_disable(ARRAY_SIZE(cs42l42->supplies), cs42l42->supplies); + + /* Restore register values to the regmap cache */ + for (i = 0; i < ARRAY_SIZE(cs42l42_shutdown_seq); ++i) + regmap_write(cs42l42->regmap, cs42l42_shutdown_seq[i].reg, save_regs[i]); + + /* The cached address page register value is now stale */ + regcache_drop_region(cs42l42->regmap, CS42L42_PAGE_REGISTER, CS42L42_PAGE_REGISTER); + + dev_dbg(dev, "System suspended\n"); + + return 0; + +} + +static int __maybe_unused cs42l42_resume(struct device *dev) +{ + struct cs42l42_private *cs42l42 = dev_get_drvdata(dev); + int ret; + + /* + * If jack was unplugged and re-plugged during suspend it could + * have changed type but the tip-sense state hasn't changed. + * Force a plugged state to be re-evaluated. + */ + if (cs42l42->plug_state != CS42L42_TS_UNPLUG) + cs42l42->plug_state = CS42L42_TS_TRANS; + + ret = regulator_bulk_enable(ARRAY_SIZE(cs42l42->supplies), cs42l42->supplies); + if (ret != 0) { + dev_err(dev, "Failed to enable supplies: %d\n", ret); + return ret; + } + + gpiod_set_value_cansleep(cs42l42->reset_gpio, 1); + usleep_range(CS42L42_BOOT_TIME_US, CS42L42_BOOT_TIME_US * 2); + + regcache_cache_only(cs42l42->regmap, false); + regcache_mark_dirty(cs42l42->regmap); + + mutex_lock(&cs42l42->irq_lock); + /* Sync LATCH_TO_VP first so the VP domain registers sync correctly */ + regcache_sync_region(cs42l42->regmap, CS42L42_MIC_DET_CTL1, CS42L42_MIC_DET_CTL1); + regcache_sync(cs42l42->regmap); + + cs42l42->suspended = false; + mutex_unlock(&cs42l42->irq_lock); + + dev_dbg(dev, "System resumed\n"); + + return 0; +} + static int cs42l42_i2c_probe(struct i2c_client *i2c_client, const struct i2c_device_id *id) { @@ -2217,6 +2353,10 @@ static int cs42l42_i2c_remove(struct i2c_client *i2c_client) return 0; } +static const struct dev_pm_ops cs42l42_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(cs42l42_suspend, cs42l42_resume) +}; + #ifdef CONFIG_OF static const struct of_device_id cs42l42_of_match[] = { { .compatible = "cirrus,cs42l42", }, @@ -2243,6 +2383,7 @@ MODULE_DEVICE_TABLE(i2c, cs42l42_id); static struct i2c_driver cs42l42_i2c_driver = { .driver = { .name = "cs42l42", + .pm = &cs42l42_pm_ops, .of_match_table = of_match_ptr(cs42l42_of_match), .acpi_match_table = ACPI_PTR(cs42l42_acpi_match), }, diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h index 53d96287abba..244b24d1f5e9 100644 --- a/sound/soc/codecs/cs42l42.h +++ b/sound/soc/codecs/cs42l42.h @@ -826,6 +826,10 @@ #define CS42L42_PLL_LOCK_POLL_US 250 #define CS42L42_PLL_LOCK_TIMEOUT_US 1250 #define CS42L42_HP_ADC_EN_TIME_US 20000 +#define CS42L42_PDN_DONE_POLL_US 1000 +#define CS42L42_PDN_DONE_TIMEOUT_US 200000 +#define CS42L42_PDN_DONE_TIME_MS 100 +#define CS42L42_FILT_DISCHARGE_TIME_MS 46 static const char *const cs42l42_supply_names[CS42L42_NUM_SUPPLIES] = { "VA", @@ -860,6 +864,7 @@ struct cs42l42_private { u8 hs_bias_sense_en; u8 stream_use; bool hp_adc_up_pending; + bool suspended; }; #endif /* __CS42L42_H__ */