From nobody Thu Nov 14 05:09:57 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 13B7CC4332F for ; Tue, 12 Dec 2023 12:20:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346464AbjLLMUI (ORCPT ); Tue, 12 Dec 2023 07:20:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55746 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232372AbjLLMUG (ORCPT ); Tue, 12 Dec 2023 07:20:06 -0500 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D3AA3D5; Tue, 12 Dec 2023 04:20:07 -0800 (PST) X-UUID: c66cc80698e811eea5db2bebc7c28f94-20231212 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=4lXtxRLW2YUA4Wg50wpANF7MKGwStkbHF3oDgsbY6kQ=; b=eIsTuf9DRXBPrpwn+rN+YYCcQ5KFwuT/XDGvaYAX2E+nWYYTHVq/5ZtfTB6KMGa78/yvBCbFC9gt+19S4NZ3DfJJN65SBDaJhccORouBws5L3ldMEDVMY8lS7DR/0wVgZgcpc15LC9lWgLfXbtK7cRYI1p2P0IKuxtuSGf1FFVw=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.35,REQID:c23d5db9-7d0d-42f6-8d8b-5969664cc573,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:0a7d16bd-2ac7-4da2-9f94-677a477649d9,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,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 X-UUID: c66cc80698e811eea5db2bebc7c28f94-20231212 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 2088098696; Tue, 12 Dec 2023 20:20:02 +0800 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) 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 15.2.1118.26; Tue, 12 Dec 2023 20:20:02 +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; Tue, 12 Dec 2023 20:20:01 +0800 From: Hsiao Chien Sung To: AngeloGioacchino Del Regno , Chun-Kuang Hu , CK Hu CC: Philipp Zabel , David Airlie , Daniel Vetter , Rob Herring , Krzysztof Kozlowski , Matthias Brugger , Chen-Yu Tsai , Sean Paul , Fei Shao , Bibby Hsieh , , , , , , Hsiao Chien Sung Subject: [PATCH v4 11/17] drm/mediatek: Turn off the layers with zero width or height Date: Tue, 12 Dec 2023 20:19:51 +0800 Message-ID: <20231212121957.19231-12-shawn.sung@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20231212121957.19231-1-shawn.sung@mediatek.com> References: <20231212121957.19231-1-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" We found that IGT (Intel GPU Tool) will try to commit layers with zero width or height and lead to undefined behaviors in hardware. Disable the layers in such situations. Signed-off-by: Hsiao Chien Sung --- drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c | 2 +- drivers/gpu/drm/mediatek/mtk_ethdr.c | 7 ++++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c b/drivers/gpu/= drm/mediatek/mtk_disp_ovl_adaptor.c index 10d23e76acaa..8789442c039f 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c @@ -156,7 +156,7 @@ void mtk_ovl_adaptor_layer_config(struct device *dev, u= nsigned int idx, merge =3D ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_MERGE0 + idx]; ethdr =3D ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_ETHDR0]; =20 - if (!pending->enable) { + if (!pending->enable || !pending->width || !pending->height) { mtk_merge_stop_cmdq(merge, cmdq_pkt); mtk_mdp_rdma_stop(rdma_l, cmdq_pkt); mtk_mdp_rdma_stop(rdma_r, cmdq_pkt); diff --git a/drivers/gpu/drm/mediatek/mtk_ethdr.c b/drivers/gpu/drm/mediate= k/mtk_ethdr.c index 73c9e3da56a7..e95331c06815 100644 --- a/drivers/gpu/drm/mediatek/mtk_ethdr.c +++ b/drivers/gpu/drm/mediatek/mtk_ethdr.c @@ -163,7 +163,12 @@ void mtk_ethdr_layer_config(struct device *dev, unsign= ed int idx, if (idx >=3D 4) return; =20 - if (!pending->enable) { + if (!pending->enable || !pending->width || !pending->height) { + /* + * instead of disabling layer with MIX_SRC_CON directly + * set the size to 0 to avoid screen shift due to mixer + * mode switch (hardware behavior) + */ mtk_ddp_write(cmdq_pkt, 0, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_SIZ= E(idx)); return; } --=20 2.18.0