diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0922-staging-vchiq_arm-children-inherit-DMA-config.patch')
-rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0922-staging-vchiq_arm-children-inherit-DMA-config.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0922-staging-vchiq_arm-children-inherit-DMA-config.patch b/target/linux/bcm27xx/patches-5.4/950-0922-staging-vchiq_arm-children-inherit-DMA-config.patch new file mode 100644 index 0000000000..9dbc80c4ac --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0922-staging-vchiq_arm-children-inherit-DMA-config.patch @@ -0,0 +1,36 @@ +From 9f0d49445428265cd6cf0862d94bc7f3dd1304d0 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Tue, 21 Jul 2020 17:34:09 +0100 +Subject: [PATCH] staging: vchiq_arm: children inherit DMA config + +Although it is no longer necessary for vchiq's children to have a +different DMA configuration to the parent, they do still need to +explicitly to have their DMA configuration set - to be that of the +parent. + +Signed-off-by: Phil Elwell <phil@raspberrypi.com> +--- + .../vc04_services/interface/vchiq_arm/vchiq_arm.c | 10 ++++++++++ + 1 file changed, 10 insertions(+) + +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c +@@ -3205,8 +3205,18 @@ vchiq_register_child(struct platform_dev + + child->dev.of_node = np; + ++ /* ++ * We want the dma-ranges etc to be copied from the parent VCHIQ device ++ * to be passed on to the children without a node of their own. ++ */ ++ 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; + } + |