From nobody Sun Sep 22 03:35:21 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0D3DC433F5 for ; Fri, 22 Apr 2022 03:34:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1443771AbiDVDhi (ORCPT ); Thu, 21 Apr 2022 23:37:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1443759AbiDVDhe (ORCPT ); Thu, 21 Apr 2022 23:37:34 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 88B0741627; Thu, 21 Apr 2022 20:34:37 -0700 (PDT) X-UUID: 5e3646d1f4ee42989f720d15f0fa0a33-20220422 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.4,REQID:e674ed82-aeb8-4522-8a9f-393b3c5f1978,OB:0,LO B:0,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:0 X-CID-META: VersionHash:faefae9,CLOUDID:cfbd8df0-da02-41b4-b6df-58f4ccd36682,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,File:nil,QS:0,BEC:nil X-UUID: 5e3646d1f4ee42989f720d15f0fa0a33-20220422 Received: from mtkexhb02.mediatek.inc [(172.21.101.103)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1011140937; Fri, 22 Apr 2022 11:34:30 +0800 Received: from mtkexhb02.mediatek.inc (172.21.101.103) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Fri, 22 Apr 2022 11:34:29 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkexhb02.mediatek.inc (172.21.101.103) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 22 Apr 2022 11:34:28 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 22 Apr 2022 11:34:27 +0800 From: Zhiyong Tao To: , , , , , , , , CC: , , , , , , , , , , , , , Subject: [PATCH v2 1/1] pwrap: mediatek: fix FSM timeout issue Date: Fri, 22 Apr 2022 11:34:23 +0800 Message-ID: <20220422033423.11702-2-zhiyong.tao@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220422033423.11702-1-zhiyong.tao@mediatek.com> References: <20220422033423.11702-1-zhiyong.tao@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: "Zhiyong.Tao" Fix pwrap FSM timeout issue which leads the system crash on GFX VSRAM power on. Add a usleep delay to avoid busy read for the H/W status. For avoiding the system behavior(ex. disable interrupt in suspend/resume flow, schedule block task)cause if (time_after()) be turn first, we change it after sleep delay. Signed-off-by: Zhiyong.Tao --- drivers/soc/mediatek/mtk-pmic-wrap.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) mode change 100644 =3D> 100755 drivers/soc/mediatek/mtk-pmic-wrap.c diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mt= k-pmic-wrap.c old mode 100644 new mode 100755 index 952bc554f443..ac7139a67e87 --- a/drivers/soc/mediatek/mtk-pmic-wrap.c +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c @@ -12,6 +12,7 @@ #include #include #include +#include =20 #define PWRAP_MT8135_BRIDGE_IORD_ARB_EN 0x4 #define PWRAP_MT8135_BRIDGE_WACS3_EN 0x10 @@ -1197,10 +1198,13 @@ static int pwrap_wait_for_state(struct pmic_wrapper= *wrp, timeout =3D jiffies + usecs_to_jiffies(10000); =20 do { - if (time_after(jiffies, timeout)) - return fp(wrp) ? 0 : -ETIMEDOUT; if (fp(wrp)) return 0; + + usleep_range(10, 11); + + if (time_after(jiffies, timeout)) + return fp(wrp) ? 0 : -ETIMEDOUT; } while (1); } =20 --=20 2.18.0