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 64C51C4332F for ; Thu, 14 Dec 2023 06:01:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1443322AbjLNGBY (ORCPT ); Thu, 14 Dec 2023 01:01:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51456 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235413AbjLNF7t (ORCPT ); Thu, 14 Dec 2023 00:59:49 -0500 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8955910C; Wed, 13 Dec 2023 21:59:08 -0800 (PST) X-UUID: dc3453da9a4511eeba30773df0976c77-20231214 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=qfrhPgjKMPJROymzBvB0YwzDzPDiGcgM9P/DdSw2bKg=; b=oXpOj/JG1v9JYHP9KiDmN7+sAgb0O2HP3CZOZaVwJvJav8P7UOlNmMw8vxltf1xZiF7UdCDCjFD/2h3r3B3NCy8BKR5GPqWX8sb/pNarxQQ0HgMos60MPyPCCotzUC+ZAex+Ynvu13wvb/S8bpUSPnL/yc+01znfI+65nsNEo8E=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.35,REQID:1a3365cc-3241-41cc-bee8-ed79d1c78cd7,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:5d391d7,CLOUDID:903c29bd-2ac7-4da2-9f94-677a477649d9,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR: NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: dc3453da9a4511eeba30773df0976c77-20231214 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 792396031; Thu, 14 Dec 2023 13:58:53 +0800 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by mtkmbs13n2.mediatek.inc (172.21.101.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Thu, 14 Dec 2023 13:58:52 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Thu, 14 Dec 2023 13:58:52 +0800 From: Hsiao Chien Sung To: AngeloGioacchino Del Regno , CK Hu CC: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chun-Kuang Hu , Philipp Zabel , David Airlie , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Matthias Brugger , Moudy Ho , Hsiao Chien Sung , Nathan Lu , "Nancy . Lin" , "Roy-CW . Yeh" , "Jason-JH . Lin" , xinlei lee , , , , , Subject: [PATCH v12 22/23] drm/mediatek: Fix underrun in VDO1 when switches off the layer Date: Thu, 14 Dec 2023 13:58:46 +0800 Message-ID: <20231214055847.4936-23-shawn.sung@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20231214055847.4936-1-shawn.sung@mediatek.com> References: <20231214055847.4936-1-shawn.sung@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Do not reset Merge while using CMDQ because reset API doesn't wait for frame done event as CMDQ does and could lead to underrun when the layer is switching off. Fixes: aaf94f7c3ae6 ("drm/mediatek: Add display merge async reset control") Reviewed-by: CK Hu Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Hsiao Chien Sung --- drivers/gpu/drm/mediatek/mtk_disp_merge.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_disp_merge.c b/drivers/gpu/drm/mediatek/mtk_disp_merge.c index e525a6b9e5b0..22f768d923d5 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_merge.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_merge.c @@ -103,7 +103,7 @@ void mtk_merge_stop_cmdq(struct device *dev, struct cmdq_pkt *cmdq_pkt) mtk_ddp_write(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CTRL); - if (priv->async_clk) + if (!cmdq_pkt && priv->async_clk) reset_control_reset(priv->reset_ctl); } -- 2.18.0