From patchwork Wed Aug 9 12:57:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?SmFzb24tSkggTGluICjmnpfnnb/npaUp?= X-Patchwork-Id: 13347963 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 A7A7EEB64DD for ; Wed, 9 Aug 2023 13:08:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:CC:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Iu79yptYpyKZLcmwVdcw+eT1MS0JVGJo459s4a36Hvg=; b=N7oiyS4lgvZ0q6tJLHoQeDyURu cN4rpVn9lhsTweSLVawcnXQ4K1Rji5P7XwALxjr817or5z76alIGwBeppVWCTirlAkhxUiqyyBx5u h+aNyEgeU3zlaK5sl+lorizL3lgsRyz3s6EVkPCfEDPoG7nHyWzse92atGAuOZvbKTJivtxZkP9X1 6nL3Li7dQp8n3PaJQMJ7mQ/lCquICI/xW4/enoO/k8/elZHl4BnTZWsa7SFFWL1OvrujDVUj0wbai FzOWq29sSWYhMNVOy5q5d6W0eAMrAXpq29Tu1PWFpkSw12XZJCtbuGga2t7EraEQsCSYO3kTyVdW2 ei0AVxFg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qTiv0-004xwn-1X; Wed, 09 Aug 2023 13:08:06 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qTiuy-004xvu-0U; Wed, 09 Aug 2023 13:08:05 +0000 X-UUID: c3ede53236b511ee912e1518a6540028-20230809 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=Iu79yptYpyKZLcmwVdcw+eT1MS0JVGJo459s4a36Hvg=; b=Nf+/ksfA+sE3T3T3B6aINgAEFPLYaX6V5lXMLf4n0H9rmP3a0PLl5uR7ALWFqKBjSelDNTybx6WPzY0v2p7jsp8x3x0ajnKK+7laaNFgxpSjuQ4GqhGYD1HP+CxyKJ7+0t9I0VsqNir3MD4hbC0q8xGJBeGShu23EiN/QxUG27Q=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.31,REQID:53b481e7-c1f6-467e-a911-21df03c93153,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:0ad78a4,CLOUDID:3134aac1-1e57-4345-9d31-31ad9818b39f,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_ULN,TF_CID_SPAM_SNR X-UUID: c3ede53236b511ee912e1518a6540028-20230809 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 1726587398; Wed, 09 Aug 2023 06:07:59 -0700 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 9 Aug 2023 20:57:23 +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; Wed, 9 Aug 2023 20:57:23 +0800 From: Jason-JH.Lin To: Chun-Kuang Hu , AngeloGioacchino Del Regno , Alexandre Mergnat , Eugen Hristev CC: Jason-ch Chen , Johnson Wang , "Jason-JH . Lin" , Singo Chang , Nancy Lin , Shawn Sung , , , , , Subject: [PATCH v5 1/2] drm/mediatek: Fix iommu fault by swapping FBs after updating plane state Date: Wed, 9 Aug 2023 20:57:21 +0800 Message-ID: <20230809125722.24112-2-jason-jh.lin@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20230809125722.24112-1-jason-jh.lin@mediatek.com> References: <20230809125722.24112-1-jason-jh.lin@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-20230809_060804_283783_0F9B8E6E X-CRM114-Status: GOOD ( 12.03 ) X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org According to the comment in drm_atomic_helper_async_commit(), we should make sure FBs have been swapped, so that cleanups in the new_state performs a cleanup in the old FB. So we should move swapping FBs after calling mtk_plane_update_new_state(), to avoid using the old FB which could be freed. Fixes: 1a64a7aff8da ("drm/mediatek: Fix cursor plane no update") Signed-off-by: Jason-JH.Lin Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: CK Hu Reviewed-by: Alexandre Mergnat --- drivers/gpu/drm/mediatek/mtk_drm_plane.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c index 31f9420aff6f..b1a918ffe457 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c @@ -210,9 +210,9 @@ static void mtk_plane_atomic_async_update(struct drm_plane *plane, plane->state->src_y = new_state->src_y; plane->state->src_h = new_state->src_h; plane->state->src_w = new_state->src_w; - swap(plane->state->fb, new_state->fb); mtk_plane_update_new_state(new_state, new_plane_state); + swap(plane->state->fb, new_state->fb); wmb(); /* Make sure the above parameters are set before update */ new_plane_state->pending.async_dirty = true; mtk_drm_crtc_async_update(new_state->crtc, plane, state);