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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9FFCC04A68 for ; Thu, 28 Jul 2022 09:40:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235661AbiG1Jkx (ORCPT ); Thu, 28 Jul 2022 05:40:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46918 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235617AbiG1Jks (ORCPT ); Thu, 28 Jul 2022 05:40:48 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 555A2B49E; Thu, 28 Jul 2022 02:40:47 -0700 (PDT) X-UUID: ec76a3fca1e7485c9046b5b537d5a4e7-20220728 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.8,REQID:f6e62fc7-c20c-4bd7-83d4-42ab672c27cc,OB:20,L OB:10,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:45,FILE:0,RULE:Release_Ham,A CTION:release,TS:45 X-CID-INFO: VERSION:1.1.8,REQID:f6e62fc7-c20c-4bd7-83d4-42ab672c27cc,OB:20,LOB :10,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:45,FILE:0,RULE:Release_Ham,ACT ION:release,TS:45 X-CID-META: VersionHash:0f94e32,CLOUDID:1a5993d0-841b-4e95-ad42-8f86e18f54fc,C OID:f0ccf6249fe2,Recheck:0,SF:28|17|19|48,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,QS:nil,BEC:nil,COL:0 X-UUID: ec76a3fca1e7485c9046b5b537d5a4e7-20220728 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1802726423; Thu, 28 Jul 2022 17:40:42 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.186) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Thu, 28 Jul 2022 17:40:41 +0800 Received: from mtksdccf07 (172.21.84.99) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Thu, 28 Jul 2022 17:40:41 +0800 Message-ID: <22cd8a6807385941c55e75b390d31424936ae8c4.camel@mediatek.com> Subject: Re: [PATCH v15 07/11] drm/mediatek: Add retry to prevent misjudgment for sink devices From: Rex-BC Chen To: AngeloGioacchino Del Regno , , , , , , , , , , CC: , , , , , , , , , , , , Date: Thu, 28 Jul 2022 17:40:41 +0800 In-Reply-To: References: <20220727045035.32225-1-rex-bc.chen@mediatek.com> <20220727045035.32225-8-rex-bc.chen@mediatek.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2022-07-27 at 11:40 +0200, AngeloGioacchino Del Regno wrote: > Il 27/07/22 06:50, Bo-Chen Chen ha scritto: > > For some DP dungles, we need to train more than onece to confirm > > that we > > don't misjudge the status of sink device. > > Please fix the typos in your commit title and description. > title: misjudgment -> misjudgement > desc: dungles->dongles; onece->once > > > > > Signed-off-by: Bo-Chen Chen > > --- > > drivers/gpu/drm/mediatek/mtk_dp.c | 21 ++++++++++++++++++--- > > 1 file changed, 18 insertions(+), 3 deletions(-) > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c > > b/drivers/gpu/drm/mediatek/mtk_dp.c > > index ce817cb59445..80d7d6488105 100644 > > --- a/drivers/gpu/drm/mediatek/mtk_dp.c > > +++ b/drivers/gpu/drm/mediatek/mtk_dp.c > > @@ -42,6 +42,7 @@ > > #define MTK_DP_CHECK_SINK_CAP_TIMEOUT_COUNT 3 > > #define MTK_DP_TBC_BUF_READ_START_ADDR 0x08 > > #define MTK_DP_TRAIN_DOWNSCALE_RETRY 8 > > +#define MTK_DP_TRAIN_CLEAR_RETRY 50 > > > > struct mtk_dp_train_info { > > bool tps3; > > @@ -1431,11 +1432,25 @@ static int mtk_dp_video_config(struct > > mtk_dp *mtk_dp) > > > > static int mtk_dp_training(struct mtk_dp *mtk_dp) > > { > > + short max_retry = MTK_DP_TRAIN_CLEAR_RETRY; > > int ret; > > > > - ret = mtk_dp_train_start(mtk_dp); > > - if (ret) > > - return ret; > > + /* > > + * We do retry to confirm that we don't misjudge the sink > > status. > > + * If it is still failed, we can confirm there are some issues > > for the > > + * sink device. > > + */ > > + do { > > + ret = mtk_dp_train_start(mtk_dp); > > + if (!ret) > > + break; > > + } while (--max_retry); > > + > > + dev_info(mtk_dp->dev, "dp training clear retry times: %d\n", > > + MTK_DP_TRAIN_CLEAR_RETRY - max_retry); > > dev_dbg() here. > > ...after which, > > Reviewed-by: AngeloGioacchino Del Regno < > angelogioacchino.delregno@collabora.com> > Hello Angelo, Thanks for your review. I will modify these in next version. BRs, Bo-Chen > > + > > + if (!max_retry) > > + return -ETIMEDOUT; > > > > ret = mtk_dp_video_config(mtk_dp); > > if (ret) > >