[PATCH v18, 14/19] media: mtk-vcodec: Support 34bits dma address for vdec

[Yunfei Dong]

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 <yunfei.dong at mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
---
 drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c | 8 ++++++++
 1 file changed, 8 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 10215ccc85f7..1c2b96b4930b 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
@@ -322,6 +322,14 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
 		}
 	}
 
+	if (of_get_property(pdev->dev.of_node, "dma-ranges", NULL)) {
+		ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(34));
+		if (ret) {
+			mtk_v4l2_err("Failed to set mask");
+			goto err_core_workq;
+		}
+	}
+
 	for (i = 0; i < MTK_VDEC_HW_MAX; i++)
 		mutex_init(&dev->dec_mutex[i]);
 	mutex_init(&dev->dev_mutex);
-- 
2.25.1