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rockchip64-6.14: Set dma mask to 64 bit (#7924)

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SuperKali 2025-03-08 14:14:46 +01:00 committed by GitHub
parent 7f32a58535
commit a691fe095b
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1 changed files with 39 additions and 0 deletions
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patch/kernel/archive/rockchip64-6.14/general-drm-rockchip-Set-dma-mask-to-64-bit.patch Normal file
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: SuperKali <hello@superkali.me>
Date: Fri, 7 Mar 2025 15:06:42 +0000
Subject: drm/rockchip: Set dma mask to 64 bit
The vop mmu support translate physical address upper 4 GB to iova
below 4 GB. So set dma mask to 64 bit to indicate we support address
> 4GB.
This can avoid warnging message like this on some boards with DDR
> 4 GB:
rockchip-drm display-subsystem: swiotlb buffer is full (sz: 266240 bytes), total 32768 (slots), used 130 (slots)
rockchip-drm display-subsystem: swiotlb buffer is full (sz: 266240 bytes), total 32768 (slots), used 0 (slots)
rockchip-drm display-subsystem: swiotlb buffer is full (sz: 266240 bytes), total 32768 (slots), used 130 (slots)
rockchip-drm display-subsystem: swiotlb buffer is full (sz: 266240 bytes), total 32768 (slots), used 130 (slots)
rockchip-drm display-subsystem: swiotlb buffer is full (sz: 266240 bytes), total 32768 (slots), used 0 (slots)
---
drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 111111111111..222222222222 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -472,7 +472,9 @@ static int rockchip_drm_platform_probe(struct platform_device *pdev)
return ret;
}
- return 0;
+ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64));
+
+ return ret;
}
static void rockchip_drm_platform_remove(struct platform_device *pdev)
--
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