diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0579-staging-vchiq-Use-the-old-dma-controller-for-OF-conf.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0579-staging-vchiq-Use-the-old-dma-controller-for-OF-conf.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0579-staging-vchiq-Use-the-old-dma-controller-for-OF-conf.patch b/target/linux/bcm27xx/patches-4.19/950-0579-staging-vchiq-Use-the-old-dma-controller-for-OF-conf.patch new file mode 100644 index 0000000000..808fdaf0ca --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0579-staging-vchiq-Use-the-old-dma-controller-for-OF-conf.patch @@ -0,0 +1,51 @@ +From 65a5b304668ed6cb4568ac1a0ffbeabb28208b38 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 +@@ -3599,6 +3599,7 @@ vchiq_register_child(struct platform_dev + { + struct platform_device_info pdevinfo; + struct platform_device *new_dev; ++ struct device_node *np; + + memset(&pdevinfo, 0, sizeof(pdevinfo)); + +@@ -3612,10 +3613,20 @@ vchiq_register_child(struct platform_dev + return NULL; + + /* +- * 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(&new_dev->dev, np, true); ++ ++ if (np != pdev->dev.of_node) ++ of_node_put(np); + + return new_dev; + } |