From patchwork Fri Oct 30 04:10:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11868443 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 F253B92C for ; Fri, 30 Oct 2020 04:11:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C63A820727 for ; Fri, 30 Oct 2020 04:11:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="ZGRglEG2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726456AbgJ3ELO (ORCPT ); Fri, 30 Oct 2020 00:11:14 -0400 Received: from z5.mailgun.us ([104.130.96.5]:25125 "EHLO z5.mailgun.us" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726426AbgJ3ELL (ORCPT ); Fri, 30 Oct 2020 00:11:11 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1604031070; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=sG+Hz7q1w0f+xVvgAmIqgk5pLO8+fZGC0xGXb78HCWI=; b=ZGRglEG2Ro3RqHE0+sPewA1pxxGMDql3uJeP49vgPxZrrm2x7G1PvwgIqvVxrmQOnzLuZc9a 2C6dFlYhMcCLr2yJOUQFiLCNXlREILBN+0iFnKTagz+3t+BcZNSlT+FhK51EiHWT+sdV231r uXx0KlTA0QEB+GmW0mNEGYsNwzI= X-Mailgun-Sending-Ip: 104.130.96.5 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-n07.prod.us-east-1.postgun.com with SMTP id 5f9b925ed292ba49084dc6cf (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Fri, 30 Oct 2020 04:11:10 GMT Sender: bbhatt=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 628FEC43391; Fri, 30 Oct 2020 04:11:09 +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=-2.9 required=2.0 tests=ALL_TRUSTED,BAYES_00,SPF_FAIL, URIBL_BLOCKED autolearn=no 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 967D1C433F0; Fri, 30 Oct 2020 04:11:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 967D1C433F0 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=fail 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 v3 08/12] bus: mhi: core: Move to an error state on mission mode failure Date: Thu, 29 Oct 2020 21:10:53 -0700 Message-Id: <1604031057-32820-9-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1604031057-32820-1-git-send-email-bbhatt@codeaurora.org> References: <1604031057-32820-1-git-send-email-bbhatt@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org If the host receives a mission mode event and by the time it can get to processing it, the register accesses fail implying a connectivity error, MHI should move to an error state. This helps avoid longer wait times from a synchronous power up perspective and accurately reflects the MHI execution environment and power management states. Signed-off-by: Bhaumik Bhatt Reviewed-by: Manivannan Sadhasivam --- drivers/bus/mhi/core/pm.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index 0299196..06adea2 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -383,10 +383,14 @@ static int mhi_pm_mission_mode_transition(struct mhi_controller *mhi_cntrl) write_lock_irq(&mhi_cntrl->pm_lock); if (MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl); - write_unlock_irq(&mhi_cntrl->pm_lock); - if (!MHI_IN_MISSION_MODE(mhi_cntrl->ee)) + if (!MHI_IN_MISSION_MODE(mhi_cntrl->ee)) { + mhi_cntrl->pm_state = MHI_PM_LD_ERR_FATAL_DETECT; + write_unlock_irq(&mhi_cntrl->pm_lock); + wake_up_all(&mhi_cntrl->state_event); return -EIO; + } + write_unlock_irq(&mhi_cntrl->pm_lock); wake_up_all(&mhi_cntrl->state_event);