* [PATCH] ARM: dts: bcm283x: Fix vc4's firmware bus DMA limitations
@ 2020-03-19 19:00 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 4+ messages in thread
From: Nicolas Saenz Julienne @ 2020-03-19 19:00 UTC (permalink / raw)
To: Rob Herring, Florian Fainelli, Ray Jui, Scott Branden,
bcm-kernel-feedback-list, Nicolas Saenz Julienne, Eric Anholt,
Stefan Wahren
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel
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>
---
arch/arm/boot/dts/bcm2835-rpi.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi
index 394c8a71b13b..fd2c766e0f71 100644
--- a/arch/arm/boot/dts/bcm2835-rpi.dtsi
+++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi
@@ -15,6 +15,7 @@ soc {
firmware: firmware {
compatible = "raspberrypi,bcm2835-firmware", "simple-bus";
mboxes = <&mailbox>;
+ dma-ranges;
};
power: power {
--
2.25.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH] ARM: dts: bcm283x: Fix vc4's firmware bus DMA limitations
@ 2020-03-19 19:00 ` Nicolas Saenz Julienne
0 siblings, 0 replies; 4+ messages in thread
From: Nicolas Saenz Julienne @ 2020-03-19 19:00 UTC (permalink / raw)
To: Rob Herring, Florian Fainelli, Ray Jui, Scott Branden,
bcm-kernel-feedback-list, Nicolas Saenz Julienne, Eric Anholt,
Stefan Wahren
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel
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>
---
arch/arm/boot/dts/bcm2835-rpi.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi
index 394c8a71b13b..fd2c766e0f71 100644
--- a/arch/arm/boot/dts/bcm2835-rpi.dtsi
+++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi
@@ -15,6 +15,7 @@ soc {
firmware: firmware {
compatible = "raspberrypi,bcm2835-firmware", "simple-bus";
mboxes = <&mailbox>;
+ dma-ranges;
};
power: power {
--
2.25.1
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] ARM: dts: bcm283x: Fix vc4's firmware bus DMA limitations
2020-03-19 19:00 ` Nicolas Saenz Julienne
@ 2020-03-22 21:45 ` Florian Fainelli
-1 siblings, 0 replies; 4+ messages in thread
From: Florian Fainelli @ 2020-03-22 21:45 UTC (permalink / raw)
To: bcm-kernel-feedback-list, Nicolas Saenz Julienne, Rob Herring,
Ray Jui, Scott Branden, Eric Anholt, Stefan Wahren
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel
On Thu, 19 Mar 2020 20:00:13 +0100, Nicolas Saenz Julienne <nsaenzjulienne@suse.de> wrote:
> 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>
> ---
Applied to devicetree/fixes, thanks!
--
Florian
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] ARM: dts: bcm283x: Fix vc4's firmware bus DMA limitations
@ 2020-03-22 21:45 ` Florian Fainelli
0 siblings, 0 replies; 4+ messages in thread
From: Florian Fainelli @ 2020-03-22 21:45 UTC (permalink / raw)
To: bcm-kernel-feedback-list, Nicolas Saenz Julienne, Rob Herring,
Ray Jui, Scott Branden, Eric Anholt, Stefan Wahren
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel
On Thu, 19 Mar 2020 20:00:13 +0100, Nicolas Saenz Julienne <nsaenzjulienne@suse.de> wrote:
> 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>
> ---
Applied to devicetree/fixes, thanks!
--
Florian
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-03-22 21:45 UTC | newest]
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2020-03-19 19:00 [PATCH] ARM: dts: bcm283x: Fix vc4's firmware bus DMA limitations Nicolas Saenz Julienne
2020-03-19 19:00 ` Nicolas Saenz Julienne
2020-03-22 21:45 ` Florian Fainelli
2020-03-22 21:45 ` Florian Fainelli
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