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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DCB07C433EF for ; Thu, 14 Oct 2021 11:02:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD770610D0 for ; Thu, 14 Oct 2021 11:02:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230235AbhJNLFB (ORCPT ); Thu, 14 Oct 2021 07:05:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230119AbhJNLFB (ORCPT ); Thu, 14 Oct 2021 07:05:01 -0400 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7A6DDC061570; Thu, 14 Oct 2021 04:02:56 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: kholk11) with ESMTPSA id 2A1B11F44A4A Subject: Re: [PATCH v7, 12/15] media: mtk-vcodec: Support 34bits dma address for vdec To: Yunfei Dong , Alexandre Courbot , Hans Verkuil , Tzung-Bi Shih , Tiffany Lin , Andrew-CT Chen , Mauro Carvalho Chehab , Rob Herring , Matthias Brugger , Tomasz Figa Cc: Hsin-Yi Wang , Fritz Koenig , Dafna Hirschfeld , Benjamin Gaignard , Daniel Vetter , dri-devel , Irui Wang , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, srv_heupstream@mediatek.com, linux-mediatek@lists.infradead.org, Project_Global_Chrome_Upstream_Group@mediatek.com References: <20211011070247.792-1-yunfei.dong@mediatek.com> <20211011070247.792-13-yunfei.dong@mediatek.com> From: AngeloGioacchino Del Regno Message-ID: <5e1c165d-176c-0141-dc96-0fdbda367c03@collabora.com> Date: Thu, 14 Oct 2021 13:02:51 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: <20211011070247.792-13-yunfei.dong@mediatek.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org > Use the dma_set_mask_and_coherent helper to set vdec > DMA bit mask to support 34bits iova space(16GB) that > the mt8192 iommu HW support. > > Whole the iova range separate to 0~4G/4G~8G/8G~12G/12G~16G, > regarding which iova range VDEC actually locate, it > depends on the dma-ranges property of vdec dtsi node. > > Signed-off-by: Yunfei Dong > --- > drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c > index de83e3b821b4..da963cdac96b 100644 > --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c > +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c > @@ -376,6 +376,9 @@ static int mtk_vcodec_probe(struct platform_device *pdev) > } > } > > + if (of_get_property(pdev->dev.of_node, "dma-ranges", NULL)) > + dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(34)); > + This function returns 0 for success, or negative number for failure: please check the return value, or this driver may not work correctly in some corner cases. Regards, - Angelo > for (i = 0; i < MTK_VDEC_HW_MAX; i++) > mutex_init(&dev->dec_mutex[i]); > spin_lock_init(&dev->irqlock); >