From patchwork Tue Dec 13 11:28:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu Beznea X-Patchwork-Id: 633544 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 00DCAC4332F for ; Tue, 13 Dec 2022 11:25:33 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 0A04D228B; Tue, 13 Dec 2022 12:24:42 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 0A04D228B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1670930732; bh=skGTs2WvA6zYDm87dHeVl8kymrVloAz2yV13MCgFbvY=; h=From:To:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: Cc:From; b=DOCHV1iyVjgyc4x+cKW8UWGD1z2npDOxt9ftOEFw7BTu5woApZ6Nc/HgGkYdXLSav VkZf2ga+aliyfWGXWWdHY+5yf9rP3V8wlKG3JlY/m0x0mFZpUOvmqt0nO7WvSyMhcT wUe7Eavcqye22iILnhsKE9hqvgRGAljz96eeMXIU= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 7B317F80533; Tue, 13 Dec 2022 12:23:47 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id CB6B2F80534; Tue, 13 Dec 2022 12:23:46 +0100 (CET) Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) (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 9E449F804ED for ; Tue, 13 Dec 2022 12:23:44 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 9E449F804ED Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key, unprotected) header.d=microchip.com header.i=@microchip.com header.a=rsa-sha256 header.s=mchp header.b=mQXW/0Ni DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1670930626; x=1702466626; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=skGTs2WvA6zYDm87dHeVl8kymrVloAz2yV13MCgFbvY=; b=mQXW/0NiFcRAWmqlPLZ1mhwn51f916gxZ8QbTDQle+oYOgaYwDwZs2db 2otPP95l0Dd6jZPM9SwN9QEJOPYLjc+shK+S9LdrG0uYH9yCUAw3mdAuS myHfjYsbmZ14rqhquOZOt6iOPXZhjCX0XTrxdm3ujymcEliGAW6x+bG/c MRK4s/5ItINWoz/KeBGDmmqko6wF+c9GVil0CFKdVGOjQ+pBNN0SHMVvv iZ73L/2s1PmwU9Aog/kvyWIvE1A1euRUXOQQUYE94QilwXaXiKUP+vcde 4Fuu3GnC9HlLnttVFrLJM51Rew2UKuupG4XkcG5F5Qu0BvRF5YfQnHIWV w==; X-IronPort-AV: E=Sophos;i="5.96,241,1665471600"; d="scan'208";a="187911755" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 13 Dec 2022 04:23:44 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.16; Tue, 13 Dec 2022 04:23:42 -0700 Received: from localhost.localdomain (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2507.16 via Frontend Transport; Tue, 13 Dec 2022 04:23:39 -0700 From: Claudiu Beznea To: , , , , , , , Subject: [PATCH v3 3/4] ASoC: mchp-pdmc: add support for suspend to RAM Date: Tue, 13 Dec 2022 13:28:50 +0200 Message-ID: <20221213112851.89212-4-claudiu.beznea@microchip.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20221213112851.89212-1-claudiu.beznea@microchip.com> References: <20221213112851.89212-1-claudiu.beznea@microchip.com> MIME-Version: 1.0 X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.29 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: , Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Claudiu Beznea Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Add support for suspend to RAM by re-aranging the lines in switch..case from mchp_pdmc_trigger() and saving/restoring the enabled interrupts. These are necessary as AT91 devices has a special power saving mode (called backup and self-refresh) where most of the SoC parts are powered off and thus we need to reconfigure the PDMC on resume. Signed-off-by: Claudiu Beznea --- sound/soc/atmel/mchp-pdmc.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/sound/soc/atmel/mchp-pdmc.c b/sound/soc/atmel/mchp-pdmc.c index f184404e74e5..cf4084dcbd5e 100644 --- a/sound/soc/atmel/mchp-pdmc.c +++ b/sound/soc/atmel/mchp-pdmc.c @@ -113,6 +113,7 @@ struct mchp_pdmc { struct clk *pclk; struct clk *gclk; u32 pdmcen; + u32 suspend_irq; int mic_no; int sinc_order; bool audio_filter_en; @@ -641,22 +642,27 @@ static int mchp_pdmc_trigger(struct snd_pcm_substream *substream, #endif switch (cmd) { - case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_START: /* Enable overrun and underrun error interrupts */ - regmap_write(dd->regmap, MCHP_PDMC_IER, + regmap_write(dd->regmap, MCHP_PDMC_IER, dd->suspend_irq | MCHP_PDMC_IR_RXOVR | MCHP_PDMC_IR_RXUDR); + dd->suspend_irq = 0; + fallthrough; + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: snd_soc_component_update_bits(cpu, MCHP_PDMC_MR, MCHP_PDMC_MR_PDMCEN_MASK, dd->pdmcen); break; - case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + regmap_read(dd->regmap, MCHP_PDMC_IMR, &dd->suspend_irq); + fallthrough; + case SNDRV_PCM_TRIGGER_STOP: /* Disable overrun and underrun error interrupts */ - regmap_write(dd->regmap, MCHP_PDMC_IDR, + regmap_write(dd->regmap, MCHP_PDMC_IDR, dd->suspend_irq | MCHP_PDMC_IR_RXOVR | MCHP_PDMC_IR_RXUDR); + fallthrough; + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: snd_soc_component_update_bits(cpu, MCHP_PDMC_MR, MCHP_PDMC_MR_PDMCEN_MASK, 0); break; @@ -1107,6 +1113,7 @@ static const struct of_device_id mchp_pdmc_of_match[] = { MODULE_DEVICE_TABLE(of, mchp_pdmc_of_match); static const struct dev_pm_ops mchp_pdmc_pm_ops = { + SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) RUNTIME_PM_OPS(mchp_pdmc_runtime_suspend, mchp_pdmc_runtime_resume, NULL) };