diff options
| author |   Maxime Ripard <maxime@cerno.tech> | 2020-05-13 16:07:24 +0200 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2020-05-15 15:01:04 +0200 |
| commit | b718102dbdfd0285ad559687a30e27cc9124e592 (patch) | |
| tree | 915ac165bc73814c6e52becb7910f2063e729dd4 /drivers/gpu/drm/sun4i | |
| parent | dt-bindings: display: sun8i-mixer: Allow for an iommu property (diff) | |
| download | linux-dev-b718102dbdfd0285ad559687a30e27cc9124e592.tar.xz linux-dev-b718102dbdfd0285ad559687a30e27cc9124e592.zip | |
drm/sun4i: mixer: Call of_dma_configure if there's an IOMMU
The main DRM device is actually a virtual device so it doesn't have the
iommus property, which is instead on the DMA masters, in this case the
mixers.
Add a call to of_dma_configure with the mixers DT node but on the DRM
virtual device to configure it in the same way than the mixers.
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/9a4daf438dd3f2fe07afb23688bfb793a0613d7d.1589378833.git-series.maxime@cerno.tech
Diffstat (limited to 'drivers/gpu/drm/sun4i')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun8i_mixer.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c index 56cc037fd312..cc4fb916318f 100644 --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c @@ -363,6 +363,19 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master, mixer->engine.ops = &sun8i_engine_ops; mixer->engine.node = dev->of_node; + if (of_find_property(dev->of_node, "iommus", NULL)) { + /* + * This assume we have the same DMA constraints for + * all our the mixers in our pipeline. This sounds + * bad, but it has always been the case for us, and + * DRM doesn't do per-device allocation either, so we + * would need to fix DRM first... + */ + ret = of_dma_configure(drm->dev, dev->of_node, true); + if (ret) + return ret; + } + /* * While this function can fail, we shouldn't do anything * if this happens. Some early DE2 DT entries don't provide |