From patchwork Mon Sep 21 16:08:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 11790353 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 246EA139A for ; Mon, 21 Sep 2020 16:09:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F04AC2151B for ; Mon, 21 Sep 2020 16:09:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="RTlt+ko6" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727584AbgIUQJ5 (ORCPT ); Mon, 21 Sep 2020 12:09:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57050 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726395AbgIUQJ5 (ORCPT ); Mon, 21 Sep 2020 12:09:57 -0400 Received: from mail-pf1-x442.google.com (mail-pf1-x442.google.com [IPv6:2607:f8b0:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B775C061755 for ; Mon, 21 Sep 2020 09:09:57 -0700 (PDT) Received: by mail-pf1-x442.google.com with SMTP id z18so9678433pfg.0 for ; Mon, 21 Sep 2020 09:09:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=mLM1ooiBRvHKnVHboD9nW5AfyUuBhafQkkCUD3MREGQ=; b=RTlt+ko60rK2/zapD8GKHlZvzBuw1IGAKR8ZEb2qajV5uohv9e9M77T+SlQGPWBnxV dOzDqtx6vXcsSro7q5q6lQhS2gsLQEH6TAt6jcWc09Uwvj4aDKHlrpXb+K0roAtRKV17 HqC4djsJ3cOGTI7UdKjOsf0HS2nJoTRi6emifrbWYvwjvTCnJENFdrkNxh2HI9c7Di5f M3J+KJjssFOFv2wBnk6DcQ83ICxaSw5cyAikweh9EtCTOH+UsDaiVNJQqHF/JTrSU2l0 UQSDrjZVgeK0uIoh72jfs/2FUuzAsmQ4pKgbd2EFEPGMh7Ima6r1YeY5eZOKMb4A3eP1 tWkg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=mLM1ooiBRvHKnVHboD9nW5AfyUuBhafQkkCUD3MREGQ=; b=tSO61pPrHg6PFCj29OKGGgOkgaE7LoKs2fo/NKGTyJ6TM3osynLCIKcz/MmWXk5YgH pGnsl9kHESJltEPM8BXcvNSY6uckt50Q4UyX+qWlxYHG/mDvej7Rvgrp6BBicRho8tA4 jBaFL86DusSIFAt2nap5ehwDqLZitcR7hl2tUIDcmP9d0D7YKSjlP8ddZA27Kp9RGaXp aC0zjMYG++OPALs9K/UdKGJh4sF1e5/f5YksRAi8yD9fuD62VdkLJSTONqPRD0XcfeFb hJ+j0ATeOOT5yJk56DSejddBi704I9efFs6JmMoBUuN9mys0s89WlhbFQoZtAoq5nv9d y0xQ== X-Gm-Message-State: AOAM532TDwJdu5ft01I/W6fiUcanP7iZ7iB4g9SCfknQi5HQv7YuvBCE VJ5dHaecyyajd+9iin2KjQph X-Google-Smtp-Source: ABdhPJxiPuI+p4Gw7kYi2ZVYeBdeqDIkwnTTAcKk8jfDI9JInlNlEiN3rqVRTgui3onFEznWXs+LMQ== X-Received: by 2002:a63:4a19:: with SMTP id x25mr308949pga.56.1600704596746; Mon, 21 Sep 2020 09:09:56 -0700 (PDT) Received: from Mani-XPS-13-9360.localdomain ([2409:4072:6d03:bd12:1004:2ccf:6900:b97]) by smtp.gmail.com with ESMTPSA id f4sm9204577pgr.68.2020.09.21.09.09.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Sep 2020 09:09:55 -0700 (PDT) From: Manivannan Sadhasivam To: gregkh@linuxfoundation.org Cc: hemantk@codeaurora.org, jhugo@codeaurora.org, bbhatt@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Manivannan Sadhasivam Subject: [PATCH 05/18] bus: mhi: core: Trigger host resume if suspended during mhi_device_get() Date: Mon, 21 Sep 2020 21:38:02 +0530 Message-Id: <20200921160815.28071-7-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200921160815.28071-1-manivannan.sadhasivam@linaro.org> References: <20200921160815.28071-1-manivannan.sadhasivam@linaro.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Bhaumik Bhatt It is possible that the host may be suspending or suspended and may not allow an outgoing device wake assert immediately if a client has requested for it. Ensure that the host wakes up and allows for it so the client does not have to wait for an external trigger or an outgoing packet to be queued for the host resume to occur. Signed-off-by: Bhaumik Bhatt Reviewed-by: Manivannan Sadhasivam Signed-off-by: Manivannan Sadhasivam --- drivers/bus/mhi/core/pm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index b227d415e937..27bb471c8f4e 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -1112,6 +1112,9 @@ void mhi_device_get(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_trigger_resume(mhi_cntrl); + mhi_cntrl->wake_get(mhi_cntrl, true); read_unlock_bh(&mhi_cntrl->pm_lock); }