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 25263C4360C for ; Sun, 6 Oct 2019 17:36:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EEDCA20862 for ; Sun, 6 Oct 2019 17:36:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570383411; bh=2r8AeKYGjMupGol4CtMYkDcX41Wu5e//UTgfixnBy/0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=vWgKK3QAL84K7kgjJPajFIm1rfih9G27BsUoHgYNn7W24iej19s81QZjcrbGzsyhD r5wiwN4cU0HP6/NkNQUa+Q4C/0nxVjKATEqny1XZZwSfRol0F0GtXTFsu8P2EUDMRG +VdhQUu2JaPuokCGsRx30T3PvidfmEICyXOqlXgQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730357AbfJFRgu (ORCPT ); Sun, 6 Oct 2019 13:36:50 -0400 Received: from mail.kernel.org ([198.145.29.99]:35666 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730339AbfJFRgt (ORCPT ); Sun, 6 Oct 2019 13:36:49 -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 DB3112053B; Sun, 6 Oct 2019 17:36:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570383408; bh=2r8AeKYGjMupGol4CtMYkDcX41Wu5e//UTgfixnBy/0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hUd+lxD4JzYJGyzFsZand6W/6W+zpMcjrxy1uYcS3yVcJELKDMl3/Fh6lXwf5a2+8 WvJQOGCF0BbyT8Izi4KNz73owNwOnBJN0rFBaYLYKQhifoiEJL2QnAhScAuww4PHhK gtr1zrrG0XRUz6N/O5s0ob2v0ndh4yr00AIW4QYM= 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 5.2 094/137] mfd: intel-lpss: Remove D3cold delay Date: Sun, 6 Oct 2019 19:21:18 +0200 Message-Id: <20191006171216.696748415@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191006171209.403038733@linuxfoundation.org> References: <20191006171209.403038733@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 aed2c04479663..3c271b14e7c6c 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