linux-kernel - [PATCH v6 10/14] media: mtk-jpegdec: Remove the setting for dma

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Date:   Mon, 3 Apr 2023 17:13:33 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Joerg Roedel <joro@...tes.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Hans Verkuil <hverkuil@...all.nl>, <nfraprado@...labora.com>,
        <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <iommu@...ts.linux.dev>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        <mingyuan.ma@...iatek.com>, <yf.wang@...iatek.com>,
        <jianjiao.zeng@...iatek.com>,
        Yunfei Dong <yunfei.dong@...iatek.com>,
        kyrie wu <kyrie.wu@...iatek.corp-partner.google.com>,
        <chengci.xu@...iatek.com>, <youlin.pei@...iatek.com>,
        <anan.sun@...iatek.com>, Yong Wu <yong.wu@...iatek.com>,
        Bin Liu <bin.liu@...iatek.com>,
        kyrie wu <kyrie.wu@...iatek.com>
Subject: [PATCH v6 10/14] media: mtk-jpegdec: Remove the setting for dma_mask

In order to simplify the masters to set their respective dma masks, MTK
IOMMU helps to centralize the processing. Because all the dma ranges is
set in IOMMU, IOMMU knows well the dma mask requirements of masters. After
this patch, the masters code does not need care
dma-ranges/dma_mask related information.

Cc: Bin Liu <bin.liu@...iatek.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: kyrie wu <kyrie.wu@...iatek.com>
Signed-off-by: Yong Wu <yong.wu@...iatek.com>
---
 drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
index 969516a940ba..9b96d2436311 100644
--- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
@@ -1757,9 +1757,6 @@ static int mtk_jpeg_probe(struct platform_device *pdev)
 	jpeg->vdev->device_caps = V4L2_CAP_STREAMING |
 				  V4L2_CAP_VIDEO_M2M_MPLANE;
 
-	if (of_get_property(pdev->dev.of_node, "dma-ranges", NULL))
-		dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(34));
-
 	ret = video_register_device(jpeg->vdev, VFL_TYPE_VIDEO, -1);
 	if (ret) {
 		v4l2_err(&jpeg->v4l2_dev, "Failed to register video device\n");
-- 
2.25.1