target/linux/bcm27xx/patches-5.4/950-0358-staging-vchiq_arm-Set-up-dma-ranges-on-child-devices.patch

   1 From a9b691174273348a6818213b9f008ae555e1c98c Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Tue, 29 Jan 2019 16:13:25 +0000
   4 Subject: [PATCH] staging: vchiq_arm: Set up dma ranges on child
   5  devices
   6
   7 The VCHIQ driver now loads the audio, camera, codec, and vc-sm
   8 drivers as platform drivers. However they were not being given
   9 the correct DMA configuration.
  10
  11 Call of_dma_configure with the parent (VCHIQ) parameters to be
  12 inherited by the child.
  13
  14 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  15 ---
  16  .../staging/vc04_services/interface/vchiq_arm/vchiq_arm.c   | 6 ++++++
  17  1 file changed, 6 insertions(+)
  18
  19 --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
  20 +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
  21 @@ -3195,6 +3195,12 @@ vchiq_register_child(struct platform_dev
  22                 child = NULL;
  23         }
  24
  25 +       /*
  26 +        * We want the dma-ranges etc to be copied from the parent VCHIQ device
  27 +        * to be passed on to the children too.
  28 +        */
  29 +       of_dma_configure(&new_dev->dev, pdev->dev.of_node, true);
  30 +
  31         return child;
  32  }
  33