target/linux/bcm27xx/patches-5.4/950-0639-ARM-dts-bcm283x-Fix-vc4-s-firmware-bus-DMA-limitatio.patch

   1 From 142ad0b8433d6beb87070bd39a6b2d23ca9cae30 Mon Sep 17 00:00:00 2001
   2 From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
   3 Date: Thu, 19 Mar 2020 20:00:13 +0100
   4 Subject: [PATCH] ARM: dts: bcm283x: Fix vc4's firmware bus DMA
   5  limitations
   6
   7 The bus is virtual and devices have to inherit their DMA constraints
   8 from the underlying interconnect. So add an empty dma-ranges property to
   9 the bus node, implying the firmware bus' DMA constraints are identical to
  10 its parent's.
  11
  12 Fixes: 7dbe8c62ceeb ("ARM: dts: Add minimal Raspberry Pi 4 support")
  13 Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
  14 Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
  15 ---
  16  arch/arm/boot/dts/bcm2835-rpi.dtsi | 1 +
  17  1 file changed, 1 insertion(+)
  18
  19 --- a/arch/arm/boot/dts/bcm2835-rpi.dtsi
  20 +++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi
  21 @@ -15,6 +15,7 @@
  22                 firmware: firmware {
  23                         compatible = "raspberrypi,bcm2835-firmware", "simple-bus";
  24                         mboxes = <&mailbox>;
  25 +                       dma-ranges;
  26                 };
  27
  28                 power: power {