target/linux/brcm2708/patches-4.19/950-0296-staging-vchiq_arm-Set-up-dma-ranges-on-child-devices.patch

   1 From f03f60a51efdf7fbc1f7d2c5b120a7de93ea6d9e 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  .../vc04_services/interface/vchiq_arm/vchiq_arm.c   | 13 ++++++++++++-
  17  1 file changed, 12 insertions(+), 1 deletion(-)
  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 @@ -3585,6 +3585,7 @@ static struct platform_device *
  22  vchiq_register_child(struct platform_device *pdev, const char *name)
  23  {
  24         struct platform_device_info pdevinfo;
  25 +       struct platform_device *new_dev;
  26
  27         memset(&pdevinfo, 0, sizeof(pdevinfo));
  28
  29 @@ -3593,7 +3594,17 @@ vchiq_register_child(struct platform_dev
  30         pdevinfo.id = PLATFORM_DEVID_NONE;
  31         pdevinfo.dma_mask = DMA_BIT_MASK(32);
  32
  33 -       return platform_device_register_full(&pdevinfo);
  34 +       new_dev = platform_device_register_full(&pdevinfo);
  35 +       if (!new_dev)
  36 +               return NULL;
  37 +
  38 +       /*
  39 +        * We want the dma-ranges etc to be copied from the parent VCHIQ device
  40 +        * to be passed on to the children too.
  41 +        */
  42 +       of_dma_configure(&new_dev->dev, pdev->dev.of_node, true);
  43 +
  44 +       return new_dev;
  45  }
  46
  47  static int vchiq_probe(struct platform_device *pdev)