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drm/vc4: Adopt the dma configuration from the HVS or V3D component

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vc4_drv isn't necessarily under the /soc node in DT as it is a
virtual device, but it is the one that does the allocations.
The DMA addresses are consumed by primarily the HVS or V3D, and
those require VideoCore cache alias address mapping, and so will be
under /soc.

During probe find the a suitable device node for HVS or V3D,
and adopt the DMA configuration of that node.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2020-05-19 14:54:28 +01:00
committed by popcornmix
parent fc674135fa
commit 046338b45d
1 changed files with 18 additions and 0 deletions
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18
drivers/gpu/drm/vc4/vc4_drv.c
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@@ -246,6 +246,14 @@ static void vc4_match_add_drivers(struct device *dev,
}
}
const struct of_device_id vc4_dma_range_matches[] = {
{ .compatible = "brcm,bcm2835-hvs" },
{ .compatible = "brcm,bcm2835-v3d" },
{ .compatible = "brcm,cygnus-v3d" },
{ .compatible = "brcm,vc4-v3d" },
{}
};
static int vc4_drm_bind(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
@@ -263,6 +271,16 @@ static int vc4_drm_bind(struct device *dev)
vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
of_node_put(node);
node = of_find_matching_node_and_match(NULL, vc4_dma_range_matches,
NULL);
if (node) {
ret = of_dma_configure(dev, node, true);
of_node_put(node);
if (ret)
return ret;
}
vc4 = devm_drm_dev_alloc(dev, &vc4_drm_driver, struct vc4_dev, base);
if (IS_ERR(vc4))
return PTR_ERR(vc4);