Re: [PATCH v2 3/4] media: platform: mtk-mdp3: Set dma_set_mask_and_coherent
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Date: 2021-10-22 15:24:47
Also in:
linux-devicetree, linux-media, linux-mediatek, lkml
Il 22/10/21 11:28, roy-cw.yeh ha scritto:
From: "Roy-CW.Yeh" <redacted> Use the dma_set_mask_and_coherent helper to set mdp DMA bit mask to support 34bits iova space(16GB) that the mt8195 iommu HW supports. The whole iova range separates to 0~4G/4G~8G/8G~12G/12G~16G. Regarding which iova range mdp actually locates, it depends on the dma-ranges property of mdp dtsi node. Signed-off-by: Roy-CW.Yeh <redacted>
Acked-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
quoted hunk ↗ jump to hunk
--- drivers/media/platform/mtk-mdp3/mtk-mdp3-core.c | 3 +++ 1 file changed, 3 insertions(+)diff --git a/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.c b/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.c index 12b029d145d6..51f7ef2b31ce 100644 --- a/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.c +++ b/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.c@@ -1141,6 +1141,9 @@ static int mdp_probe(struct platform_device *pdev) mdp->pdev = pdev; mdp->mdp_data = of_device_get_match_data(&pdev->dev); + if (of_get_property(pdev->dev.of_node, "dma-ranges", NULL)) + dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(34)); + ret = of_property_read_u32(dev->of_node, "mediatek,mdp3-id", &id); if (ret) { dev_err(dev, "Failed to get mdp-id\n");
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