From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 68F3FC4360C for ; Sun, 6 Oct 2019 17:44:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3EE892080F for ; Sun, 6 Oct 2019 17:44:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570383840; bh=QwTcFMBesfpfRCkx9Ek6f7fseKxUhCJ26xYBuzSQOoA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=bXRdexLOV5PQijkr7h6yxWnXaIuxpee/ST7UQv2+dF6bQIGGvpEvqK/SXhN2Pn0yT Uak9zCv5o8uve0zLsn0Isv9r01fQLHtb7GfwhVMeUVROFH+SpvxXB4uIdcAbuW2PTm Uj4sqtO5hX6S0GMqqrJ7RrzKTYBtnByxucfi9D4o= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731607AbfJFRn7 (ORCPT ); Sun, 6 Oct 2019 13:43:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:44030 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731598AbfJFRn4 (ORCPT ); Sun, 6 Oct 2019 13:43:56 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 38E6620700; Sun, 6 Oct 2019 17:43:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570383835; bh=QwTcFMBesfpfRCkx9Ek6f7fseKxUhCJ26xYBuzSQOoA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ePCpmzFvJB4h3dEELh4zowM7RrMQ5bUfZ/hTH6quiTVOMyTqRubkyfB0UnjPcYd/v HxW7ZeCK6Ekma3WljSNDRUEsgXNd/z7M4Jb40+NnOFPseP2871a4StxsyYmM3LEClc 1WF5ckXeK3L61yptNcNVnEmxd36bYX9xiSlGnRYs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kai-Heng Feng , Andy Shevchenko , Lee Jones , Sasha Levin Subject: [PATCH 5.3 086/166] mfd: intel-lpss: Remove D3cold delay Date: Sun, 6 Oct 2019 19:20:52 +0200 Message-Id: <20191006171220.767004334@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191006171212.850660298@linuxfoundation.org> References: <20191006171212.850660298@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kai-Heng Feng [ Upstream commit 76380a607ba0b28627c9b4b55cd47a079a59624b ] Goodix touchpad may drop its first couple input events when i2c-designware-platdrv and intel-lpss it connects to took too long to runtime resume from runtime suspended state. This issue happens becuase the touchpad has a rather small buffer to store up to 13 input events, so if the host doesn't read those events in time (i.e. runtime resume takes too long), events are dropped from the touchpad's buffer. The bottleneck is D3cold delay it waits when transitioning from D3cold to D0, hence remove the delay to make the resume faster. I've tested some systems with intel-lpss and haven't seen any regression. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=202683 Signed-off-by: Kai-Heng Feng Reviewed-by: Andy Shevchenko Signed-off-by: Lee Jones Signed-off-by: Sasha Levin --- drivers/mfd/intel-lpss-pci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/mfd/intel-lpss-pci.c b/drivers/mfd/intel-lpss-pci.c index ade6e1ce5a983..e3a04929aaa36 100644 --- a/drivers/mfd/intel-lpss-pci.c +++ b/drivers/mfd/intel-lpss-pci.c @@ -35,6 +35,8 @@ static int intel_lpss_pci_probe(struct pci_dev *pdev, info->mem = &pdev->resource[0]; info->irq = pdev->irq; + pdev->d3cold_delay = 0; + /* Probably it is enough to set this for iDMA capable devices only */ pci_set_master(pdev); pci_try_set_mwi(pdev); -- 2.20.1