From patchwork Mon Aug 10 22:00:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11708239 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1A003138C for ; Mon, 10 Aug 2020 22:01:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F0AD520748 for ; Mon, 10 Aug 2020 22:01:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="lkIQkTO3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726649AbgHJWBq (ORCPT ); Mon, 10 Aug 2020 18:01:46 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:31243 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726657AbgHJWBq (ORCPT ); Mon, 10 Aug 2020 18:01:46 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1597096904; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=xMY0O1xeL6kDCowrwUvGj3wJ0vz9brzkeVT9VotSpM0=; b=lkIQkTO3kPZsoZ4bHUs0pXWnj5DvnfW6KaGmNbbHdo7aPdxCEbcDULm4b5bPnmylIyyFq/Fj 9xS0bzLMwzdamDxwWAjn2aFx9owxrWGXkhIy3zg5iqlzPt2JDF60HqcChx2Q8tswFTeFiCDa USB0aesVL1c/ss7u0nx1znQVG5A= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n06.prod.us-east-1.postgun.com with SMTP id 5f31c3ac91f8def8b29f04ee (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 10 Aug 2020 22:01:16 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 3B3D4C43391; Mon, 10 Aug 2020 22:01:15 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=ham autolearn_force=no version=3.4.0 Received: from malabar-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id 8A008C43395; Mon, 10 Aug 2020 22:01:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 8A008C43395 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: manivannan.sadhasivam@linaro.org Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org, jhugo@codeaurora.org, linux-kernel@vger.kernel.org, Bhaumik Bhatt Subject: [PATCH v7 03/11] bus: mhi: core: Use helper API to trigger a non-blocking host resume Date: Mon, 10 Aug 2020 15:00:57 -0700 Message-Id: <1597096865-19636-4-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1597096865-19636-1-git-send-email-bbhatt@codeaurora.org> References: <1597096865-19636-1-git-send-email-bbhatt@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Autonomous low power mode support requires the MHI host to resume from multiple places and post a wakeup source to exit system suspend. This needs to be done in a non-blocking manner. Introduce a helper API to trigger the host resume for data transfers and other non-blocking use cases while supporting implementation of autonomous low power modes. Signed-off-by: Bhaumik Bhatt Reviewed-by: Manivannan Sadhasivam --- drivers/bus/mhi/core/internal.h | 7 +++++++ drivers/bus/mhi/core/main.c | 21 +++++++-------------- drivers/bus/mhi/core/pm.c | 13 ++++--------- 3 files changed, 18 insertions(+), 23 deletions(-) diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h index bcfa7b6..1bbd6e9 100644 --- a/drivers/bus/mhi/core/internal.h +++ b/drivers/bus/mhi/core/internal.h @@ -599,6 +599,13 @@ int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl); int mhi_send_cmd(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan, enum mhi_cmd_type cmd); +static inline void mhi_trigger_resume(struct mhi_controller *mhi_cntrl) +{ + pm_wakeup_event(&mhi_cntrl->mhi_dev->dev, 0); + mhi_cntrl->runtime_get(mhi_cntrl); + mhi_cntrl->runtime_put(mhi_cntrl); +} + /* Register access methods */ void mhi_db_brstmode(struct mhi_controller *mhi_cntrl, struct db_cfg *db_cfg, void __iomem *db_addr, dma_addr_t db_val); diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index 1f622ce..79be18e 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -909,8 +909,7 @@ void mhi_ctrl_ev_task(unsigned long data) * process it since we are probably in a suspended state, * so trigger a resume. */ - mhi_cntrl->runtime_get(mhi_cntrl); - mhi_cntrl->runtime_put(mhi_cntrl); + mhi_trigger_resume(mhi_cntrl); return; } @@ -971,10 +970,8 @@ int mhi_queue_skb(struct mhi_device *mhi_dev, enum dma_data_direction dir, } /* we're in M3 or transitioning to M3 */ - if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) { - mhi_cntrl->runtime_get(mhi_cntrl); - mhi_cntrl->runtime_put(mhi_cntrl); - } + if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) + mhi_trigger_resume(mhi_cntrl); /* Toggle wake to exit out of M2 */ mhi_cntrl->wake_toggle(mhi_cntrl); @@ -1032,10 +1029,8 @@ int mhi_queue_dma(struct mhi_device *mhi_dev, enum dma_data_direction dir, } /* we're in M3 or transitioning to M3 */ - if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) { - mhi_cntrl->runtime_get(mhi_cntrl); - mhi_cntrl->runtime_put(mhi_cntrl); - } + if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) + mhi_trigger_resume(mhi_cntrl); /* Toggle wake to exit out of M2 */ mhi_cntrl->wake_toggle(mhi_cntrl); @@ -1147,10 +1142,8 @@ int mhi_queue_buf(struct mhi_device *mhi_dev, enum dma_data_direction dir, read_lock_irqsave(&mhi_cntrl->pm_lock, flags); /* we're in M3 or transitioning to M3 */ - if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) { - mhi_cntrl->runtime_get(mhi_cntrl); - mhi_cntrl->runtime_put(mhi_cntrl); - } + if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) + mhi_trigger_resume(mhi_cntrl); /* Toggle wake to exit out of M2 */ mhi_cntrl->wake_toggle(mhi_cntrl); diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index 661d704..b227d41 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -824,11 +824,8 @@ int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl) /* Wake up the device */ read_lock_bh(&mhi_cntrl->pm_lock); mhi_cntrl->wake_get(mhi_cntrl, true); - if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) { - pm_wakeup_event(&mhi_cntrl->mhi_dev->dev, 0); - mhi_cntrl->runtime_get(mhi_cntrl); - mhi_cntrl->runtime_put(mhi_cntrl); - } + if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) + mhi_trigger_resume(mhi_cntrl); read_unlock_bh(&mhi_cntrl->pm_lock); ret = wait_event_timeout(mhi_cntrl->state_event, @@ -1139,10 +1136,8 @@ void mhi_device_put(struct mhi_device *mhi_dev) mhi_dev->dev_wake--; read_lock_bh(&mhi_cntrl->pm_lock); - if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) { - mhi_cntrl->runtime_get(mhi_cntrl); - mhi_cntrl->runtime_put(mhi_cntrl); - } + if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) + mhi_trigger_resume(mhi_cntrl); mhi_cntrl->wake_put(mhi_cntrl, false); read_unlock_bh(&mhi_cntrl->pm_lock);