From patchwork Thu Sep 1 04:41:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?UmV4LUJDIENoZW4gKOmZs+afj+i+sCk=?= X-Patchwork-Id: 12961789 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 12A6EECAAD1 for ; Thu, 1 Sep 2022 05:25:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=SJrelyhYqZEry3rXwu8KgRFXSitH6ItOqOeWZR2g+t8=; b=Bi6ZsnOQc6egCS N//rzSfsRyDKQz7oKRUDpvvcf1FkKRRtmhAutnSYAzKwJZrojn/2nJcVeuj9DvXmWmxyXSwRmbqtP L4RXw9lnEuXFGk2frr1YG9449Rof2oA9ktffxwhYzwCuMSR3yVG1EfFMBDCkVEws6qbew26YTIpOD K3CQago9EXbNkUXI8pVoUn80lJzGZaIhHfXLe4egtdY5cmDYkyfoN6ufcZBl2u3iSapPT2f8E13AD iRg7ny1Y3OOWssXK0ETiCkGg+c2zOjWVeWWrukRIOxqwlsgMhhY1I75+KJz7qnZ/kWU3hNj05NHBb s30fy6C+8xr+4hW+7jZQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTcgP-009nau-D2; Thu, 01 Sep 2022 05:24:05 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oTcgL-009nZA-AB; Thu, 01 Sep 2022 05:24:02 +0000 X-UUID: f963216ba73e439bba79f17107e8c322-20220831 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=BZGrMSHNWlybpzH/lRqiPGtFt4PDIEbLYBxqAsW/Mio=; b=F8Mihcd+r0IdWLBJwEYMcEmE/HLI8KmhGpS13v6GOYqxpqUXFAjVB1R1+SnQS6gyR2By4/Ioz7mgcXqERfkfW82RY4sCdwsKjnbrGGHgC35PMjvpEdQDQGljt17tAI8k0UyNmOkFQg2nFM7dzL65BnZ35DYLEz5JX8rRpqS5Kk0=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.10,REQID:492431ec-32b5-4322-b34e-8ed215d32363,OB:0,L OB:0,IP:0,URL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release _Ham,ACTION:release,TS:-5 X-CID-META: VersionHash:84eae18,CLOUDID:281d47d0-20bd-4e5e-ace8-00692b7ab380,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,Bulk:nil,QS:nil,BEC:nil,COL:0 X-UUID: f963216ba73e439bba79f17107e8c322-20220831 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1435077816; Wed, 31 Aug 2022 22:23:58 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Thu, 1 Sep 2022 12:41:52 +0800 Received: from mtksdccf07.mediatek.inc (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, 1 Sep 2022 12:41:52 +0800 From: Bo-Chen Chen To: , , , , , , , , , CC: , , , , , , , , , , , , , , Bo-Chen Chen Subject: [PATCH v17 07/10] drm/mediatek: dp: Determine device of next_bridge Date: Thu, 1 Sep 2022 12:41:46 +0800 Message-ID: <20220901044149.16782-8-rex-bc.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220901044149.16782-1-rex-bc.chen@mediatek.com> References: <20220901044149.16782-1-rex-bc.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220831_222401_376097_D489F4BA X-CRM114-Status: GOOD ( 12.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org It's not necessary to have a next_bridge for DP device, so we add this patch to judge this. Signed-off-by: Bo-Chen Chen Reviewed-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_dp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c index 136e13150281..e37c9185e4ec 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1886,7 +1886,10 @@ static int mtk_dp_probe(struct platform_device *pdev) "failed to request dp irq resource\n"); mtk_dp->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0); - if (IS_ERR(mtk_dp->next_bridge)) + if (IS_ERR(mtk_dp->next_bridge) && + PTR_ERR(mtk_dp->next_bridge) == -ENODEV) + mtk_dp->next_bridge = NULL; + else if (IS_ERR(mtk_dp->next_bridge)) return dev_err_probe(dev, PTR_ERR(mtk_dp->next_bridge), "Failed to get bridge\n");