diff options
| author | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2025-10-22 19:19:48 +0300 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2025-11-15 00:20:12 +0100 |
| commit | 7d7bb790aced3b1b8550b74e02fdfc001d044bee (patch) | |
| tree | cbd9965aa1e470667803d094634dec3e91c2a2e9 | |
| parent | e95b9ff6bfa400d34e1cfcd8062641ba3be821a7 (diff) | |
drm/rockchip: Set VOP for the DRM DMA device
Use VOP for DMA operations performed by DRM core. Rockchip DRM driver
is backed by a virtual device that isn't IOMMU-capable, while VOP is the
actual display controller device backed by IOMMU. Fixes "swiotlb buffer
is full" warning messages originated from GEM prime code paths.
Note, that backporting is non-trivial as this depends on
commit 143ec8d3f9396 ("drm/prime: Support dedicated DMA device for dma-buf
imports"), which landed in v6.16 and commit 421be3ee36a4 ("drm/rockchip:
Refactor IOMMU initialisation"), which landed in v5.19.
Reported-by: Daniel Stone <daniels@collabora.com>
Fixes: 2048e3286f34 ("drm: rockchip: Add basic drm driver")
Cc: stable@vger.kernel.org # v6.16+
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Tested-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20251022161948.199731-1-dmitry.osipenko@collabora.com
| -rw-r--r-- | drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c index c5c6e2b5772d..3099408e9d05 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c @@ -97,6 +97,9 @@ void rockchip_drm_dma_init_device(struct drm_device *drm_dev, private->iommu_dev = ERR_PTR(-ENODEV); else if (!private->iommu_dev) private->iommu_dev = dev; + + if (!IS_ERR(private->iommu_dev)) + drm_dev_set_dma_dev(drm_dev, private->iommu_dev); } static int rockchip_drm_init_iommu(struct drm_device *drm_dev) |