From nobody Thu Nov 14 04:58:33 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 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 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" 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/me= diatek/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 cmd= q_pkt *cmdq_pkt) mtk_ddp_write(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CTRL); =20 - if (priv->async_clk) + if (!cmdq_pkt && priv->async_clk) reset_control_reset(priv->reset_ctl); } =20 --=20 2.18.0