| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.5 24/30] ARM: dts: bcm283x: Fix vc4s firmware bus DMA limitations | Date | Wed, 1 Apr 2020 18:17:28 +0200 |
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From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
commit 55c7c0621078bd73e9d4d2a11eb36e61bc6fe998 upstream.
The bus is virtual and devices have to inherit their DMA constraints from the underlying interconnect. So add an empty dma-ranges property to the bus node, implying the firmware bus' DMA constraints are identical to its parent's.
Fixes: 7dbe8c62ceeb ("ARM: dts: Add minimal Raspberry Pi 4 support") Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- arch/arm/boot/dts/bcm2835-rpi.dtsi | 1 + 1 file changed, 1 insertion(+)
--- a/arch/arm/boot/dts/bcm2835-rpi.dtsi +++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi @@ -15,6 +15,7 @@ firmware: firmware { compatible = "raspberrypi,bcm2835-firmware", "simple-bus"; mboxes = <&mailbox>; + dma-ranges; }; power: power {
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