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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 56AF8C352A9 for ; Sun, 29 Sep 2019 17:37:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2388B21906 for ; Sun, 29 Sep 2019 17:37:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569778655; bh=FRowA1mgth8qSVn5n86QD5RHhQy4jDtxItqvkVd170Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=k5SfsQF0alVc4KjNXxISuMJtaRqCqjD/k5URPSG1tB3a9c69OtimGChUzRtari0M7 anFoNnCfQ/AOJRnXBmajHQsX93uT9eA9pdX2qjF2wBf+GM2LGK5QxqD9iz4ApK6e5h H0U5C0dmZp8l7gSPUZ7drXbepHpv7k/KmavvnCPo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730287AbfI2RhE (ORCPT ); Sun, 29 Sep 2019 13:37:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:49938 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730114AbfI2RhB (ORCPT ); Sun, 29 Sep 2019 13:37:01 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C162B21BE5; Sun, 29 Sep 2019 17:36:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569778620; bh=FRowA1mgth8qSVn5n86QD5RHhQy4jDtxItqvkVd170Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gXmQ491ivDnVbcQgC6U2GJsVrFxYinUU+JGGH5YaEdeXx5AX1/g5eiqEFMHv502/L ZTX3QZD0wfFIjNHqRxt668LQtgUR3w6AAapZd2owL11mD5gUmPH77v7jU9BQh4HveW HRgNxRCO6S5Nv38usnBPZss4x6TJHJNfzi3gk3TY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kai-Heng Feng , Andy Shevchenko , Lee Jones , Sasha Levin Subject: [PATCH AUTOSEL 4.4 2/9] mfd: intel-lpss: Remove D3cold delay Date: Sun, 29 Sep 2019 13:36:47 -0400 Message-Id: <20190929173655.10178-2-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190929173655.10178-1-sashal@kernel.org> References: <20190929173655.10178-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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 5bfdfccbb9a1a..032c95157497f 100644 --- a/drivers/mfd/intel-lpss-pci.c +++ b/drivers/mfd/intel-lpss-pci.c @@ -38,6 +38,8 @@ 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); -- 2.20.1