+++ /dev/null
-From 6aa74a52e014952b1a144def670a03a7deb0e112 Mon Sep 17 00:00:00 2001
-From: Dave Stevenson <dave.stevenson@raspberrypi.org>
-Date: Tue, 18 Jun 2019 12:15:50 +0100
-Subject: [PATCH] staging: vchiq: Use the old dma controller for OF
- config on platform devices
-
-vchiq on Pi4 is no longer under the soc node, therefore it
-doesn't get the dma-ranges for the VPU.
-
-Switch to using the configuration of the old dma controller as
-that will set the dma-ranges correctly.
-
-Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
----
- .../interface/vchiq_arm/vchiq_arm.c | 17 ++++++++++++++---
- 1 file changed, 14 insertions(+), 3 deletions(-)
-
---- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
-+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
-@@ -3181,6 +3181,7 @@ vchiq_register_child(struct platform_dev
- {
- struct platform_device_info pdevinfo;
- struct platform_device *child;
-+ struct device_node *np;
-
- memset(&pdevinfo, 0, sizeof(pdevinfo));
-
-@@ -3196,10 +3197,20 @@ vchiq_register_child(struct platform_dev
- }
-
- /*
-- * We want the dma-ranges etc to be copied from the parent VCHIQ device
-- * to be passed on to the children too.
-+ * We want the dma-ranges etc to be copied from a device with the
-+ * correct dma-ranges for the VPU.
-+ * VCHIQ on Pi4 is now under scb which doesn't get those dma-ranges.
-+ * Take the "dma" node as going to be suitable as it sees the world
-+ * through the same eyes as the VPU.
- */
-- of_dma_configure(&new_dev->dev, pdev->dev.of_node, true);
-+ np = of_find_node_by_path("dma");
-+ if (!np)
-+ np = pdev->dev.of_node;
-+
-+ of_dma_configure(&child->dev, np, true);
-+
-+ if (np != pdev->dev.of_node)
-+ of_node_put(np);
-
- return child;
- }