55 lines
1.7 KiB
Diff
55 lines
1.7 KiB
Diff
From d57ee5afedf0b1b9a9afb29357c484acda5a40af Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Tue, 19 May 2020 14:54:28 +0100
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Subject: [PATCH] drm/vc4: Adopt the dma configuration from the HVS or
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V3D component
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vc4_drv isn't necessarily under the /soc node in DT as it is a
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virtual device, but it is the one that does the allocations.
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The DMA addresses are consumed by primarily the HVS or V3D, and
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those require VideoCore cache alias address mapping, and so will be
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under /soc.
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During probe find the a suitable device node for HVS or V3D,
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and adopt the DMA configuration of that node.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/gpu/drm/vc4/vc4_drv.c | 18 ++++++++++++++++++
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1 file changed, 18 insertions(+)
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--- a/drivers/gpu/drm/vc4/vc4_drv.c
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+++ b/drivers/gpu/drm/vc4/vc4_drv.c
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@@ -246,6 +246,14 @@ static void vc4_match_add_drivers(struct
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}
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}
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+const struct of_device_id vc4_dma_range_matches[] = {
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+ { .compatible = "brcm,bcm2835-hvs" },
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+ { .compatible = "brcm,bcm2835-v3d" },
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+ { .compatible = "brcm,cygnus-v3d" },
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+ { .compatible = "brcm,vc4-v3d" },
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+ {}
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+};
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+
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static int vc4_drm_bind(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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@@ -263,6 +271,16 @@ static int vc4_drm_bind(struct device *d
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vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
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of_node_put(node);
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+ node = of_find_matching_node_and_match(NULL, vc4_dma_range_matches,
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+ NULL);
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+ if (node) {
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+ ret = of_dma_configure(dev, node, true);
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+ of_node_put(node);
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+
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+ if (ret)
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+ return ret;
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+ }
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+
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vc4 = devm_drm_dev_alloc(dev, &vc4_drm_driver, struct vc4_dev, base);
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if (IS_ERR(vc4))
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return PTR_ERR(vc4);
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