Subject: [PATCH v5 07/14] media: mediatek: vcodec: support 36bit iova address

From: Kyrie Wu <[email-masked]>
Date: Wed, 3 Jun 2026 16:40:37 +0800

From: Yunfei Dong <[email-masked]>

Need to set dma mask to support 36bit iova address for decoder
hardware can use 36bit address to decode for mt8196.

Signed-off-by: Yunfei Dong <[email-masked]>
Reviewed-by: Nicolas Dufresne <[email-masked]>
---
 .../platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c  | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c
index ce17b649022f..68759db6f8d1 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c
@@ -390,6 +390,13 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 	dma_set_max_seg_size(&pdev->dev, UINT_MAX);
+	if (dev->chip_name == MTK_VDEC_MT8196) {
+		ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(36));
+		if (ret) {
+			dev_err(&pdev->dev, "Failed to enable 36-bit DMA: %d\n", ret);
+			return ret;
+		}
+	}
 
 	dev->fw_handler = mtk_vcodec_fw_select(dev, fw_type, DECODER);
 	if (IS_ERR(dev->fw_handler))
-- 
2.45.2