Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

[Stefan Wahren]

Hi,

[add Peter and Ivan]

Am 26.03.24 um 20:58 schrieb Laurent Pinchart:
> Hello,
>
> This small series includes a few drive-by fixes for DT validation
> errors.
>
> The first patch has been posted previously in v1 ([1], and now addresses
> a small review comment. I think it's good to go.
>
> The next two patches address the same issue as "[PATCH 1/2] dt-bindings:
> arm: bcm: raspberrypi,bcm2835-firmware: Add missing properties" ([2]),
> but this time with a (hopefully) correct approach. Patch 2/3 starts by
> fixing the raspberrypi-bcm2835-firmware driver, removing the need for DT
> properties that are specified in bcm2835-rpi.dtsi but not documented in
> the corresponding bindings. Patch 3/3 can then drop those properties,
> getting rid of the warnings.
since this series drops properties from the device tree, does anyone
have the chance to test it with a recent U-Boot?
>
> [1] https://lore.kernel.org/linux-arm-kernel/20240326004902.17054-3-laurent.pinchart@ideasonboard.com/
> [2] https://lore.kernel.org/linux-arm-kernel/20240326004902.17054-2-laurent.pinchart@ideasonboard.com/
>
> Laurent Pinchart (3):
>    dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Add gpio child
>      node
>    firmware: raspberrypi: Use correct device for DMA mappings
>    ARM: dts: bcm283x: Drop unneeded properties in the bcm2835-firmware
>      node
>
>   .../arm/bcm/raspberrypi,bcm2835-firmware.yaml | 30 +++++++++++++++++++
>   .../gpio/raspberrypi,firmware-gpio.txt        | 30 -------------------
>   arch/arm/boot/dts/broadcom/bcm2835-rpi.dtsi   |  4 ---
>   drivers/firmware/raspberrypi.c                |  7 +++--
>   4 files changed, 34 insertions(+), 37 deletions(-)
>   delete mode 100644 Documentation/devicetree/bindings/gpio/raspberrypi,firmware-gpio.txt
>

Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

[Laurent Pinchart]

On Wed, Mar 27, 2024 at 07:49:38AM +0100, Stefan Wahren wrote:
> Hi,
> 
> [add Peter and Ivan]
> 
> Am 26.03.24 um 20:58 schrieb Laurent Pinchart:
> > Hello,
> >
> > This small series includes a few drive-by fixes for DT validation
> > errors.
> >
> > The first patch has been posted previously in v1 ([1], and now addresses
> > a small review comment. I think it's good to go.
> >
> > The next two patches address the same issue as "[PATCH 1/2] dt-bindings:
> > arm: bcm: raspberrypi,bcm2835-firmware: Add missing properties" ([2]),
> > but this time with a (hopefully) correct approach. Patch 2/3 starts by
> > fixing the raspberrypi-bcm2835-firmware driver, removing the need for DT
> > properties that are specified in bcm2835-rpi.dtsi but not documented in
> > the corresponding bindings. Patch 3/3 can then drop those properties,
> > getting rid of the warnings.
>
> since this series drops properties from the device tree, does anyone
> have the chance to test it with a recent U-Boot?

I don't have U-Boot running with my RPi, so I would appreciate if
someone could help :-)

> > [1] https://lore.kernel.org/linux-arm-kernel/20240326004902.17054-3-laurent.pinchart@ideasonboard.com/
> > [2] https://lore.kernel.org/linux-arm-kernel/20240326004902.17054-2-laurent.pinchart@ideasonboard.com/
> >
> > Laurent Pinchart (3):
> >    dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Add gpio child
> >      node
> >    firmware: raspberrypi: Use correct device for DMA mappings
> >    ARM: dts: bcm283x: Drop unneeded properties in the bcm2835-firmware
> >      node
> >
> >   .../arm/bcm/raspberrypi,bcm2835-firmware.yaml | 30 +++++++++++++++++++
> >   .../gpio/raspberrypi,firmware-gpio.txt        | 30 -------------------
> >   arch/arm/boot/dts/broadcom/bcm2835-rpi.dtsi   |  4 ---
> >   drivers/firmware/raspberrypi.c                |  7 +++--
> >   4 files changed, 34 insertions(+), 37 deletions(-)
> >   delete mode 100644 Documentation/devicetree/bindings/gpio/raspberrypi,firmware-gpio.txt
> >

-- 
Regards,

Laurent Pinchart

Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

[Ivan T. Ivanov]

Hi,

> On 28 Mar 2024, at 1:37, Laurent Pinchart <laurent.pinchart@ideasonboard.com> wrote:
> 
> On Wed, Mar 27, 2024 at 07:49:38AM +0100, Stefan Wahren wrote:
>> Hi,
>> 
>> [add Peter and Ivan]
>> 
>> Am 26.03.24 um 20:58 schrieb Laurent Pinchart:
>>> Hello,
>>> 
>>> This small series includes a few drive-by fixes for DT validation
>>> errors.
>>> 
>>> The first patch has been posted previously in v1 ([1], and now addresses
>>> a small review comment. I think it's good to go.
>>> 
>>> The next two patches address the same issue as "[PATCH 1/2] dt-bindings:
>>> arm: bcm: raspberrypi,bcm2835-firmware: Add missing properties" ([2]),
>>> but this time with a (hopefully) correct approach. Patch 2/3 starts by
>>> fixing the raspberrypi-bcm2835-firmware driver, removing the need for DT
>>> properties that are specified in bcm2835-rpi.dtsi but not documented in
>>> the corresponding bindings. Patch 3/3 can then drop those properties,
>>> getting rid of the warnings.
>> 
>> since this series drops properties from the device tree, does anyone
>> have the chance to test it with a recent U-Boot?
> 
> I don't have U-Boot running with my RPi, so I would appreciate if
> someone could help :-)


Sure, just  give me some time :-)

Regards,
Ivan

Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

[Ivan T. Ivanov]

Hi,

On 2024-03-28 01:37, Laurent Pinchart wrote:
> On Wed, Mar 27, 2024 at 07:49:38AM +0100, Stefan Wahren wrote:
>> Hi,
>> 
>> [add Peter and Ivan]
>> 
>> Am 26.03.24 um 20:58 schrieb Laurent Pinchart:
>> > Hello,
>> >
>> > This small series includes a few drive-by fixes for DT validation
>> > errors.
>> >
>> > The first patch has been posted previously in v1 ([1], and now addresses
>> > a small review comment. I think it's good to go.
>> >
>> > The next two patches address the same issue as "[PATCH 1/2] dt-bindings:
>> > arm: bcm: raspberrypi,bcm2835-firmware: Add missing properties" ([2]),
>> > but this time with a (hopefully) correct approach. Patch 2/3 starts by
>> > fixing the raspberrypi-bcm2835-firmware driver, removing the need for DT
>> > properties that are specified in bcm2835-rpi.dtsi but not documented in
>> > the corresponding bindings. Patch 3/3 can then drop those properties,
>> > getting rid of the warnings.
>> 
>> since this series drops properties from the device tree, does anyone
>> have the chance to test it with a recent U-Boot?
> 
> I don't have U-Boot running with my RPi, so I would appreciate if
> someone could help :-)

Sorry for taking me so long to verify this.

I think on RPi U-Boot side we are fine. API used when accessing Mbox
device do not follow DM model and do not use DMA, but just access
device directly using this nice macros phys_to_bus/bus_to_phys.

I build new DTB files with this patch included and U-Boot build
from the latest sources. No obvious issues on RPi3 and RPi4.
Devices boot fine.

Regards,
Ivan

Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

[Stefan Wahren]

Am 02.04.24 um 10:58 schrieb Ivan T. Ivanov:
>
> Hi,
>
> On 2024-03-28 01:37, Laurent Pinchart wrote:
>> On Wed, Mar 27, 2024 at 07:49:38AM +0100, Stefan Wahren wrote:
>>> Hi,
>>>
>>> [add Peter and Ivan]
>>>
>>> Am 26.03.24 um 20:58 schrieb Laurent Pinchart:
>>> > Hello,
>>> >
>>> > This small series includes a few drive-by fixes for DT validation
>>> > errors.
>>> >
>>> > The first patch has been posted previously in v1 ([1], and now
>>> addresses
>>> > a small review comment. I think it's good to go.
>>> >
>>> > The next two patches address the same issue as "[PATCH 1/2]
>>> dt-bindings:
>>> > arm: bcm: raspberrypi,bcm2835-firmware: Add missing properties"
>>> ([2]),
>>> > but this time with a (hopefully) correct approach. Patch 2/3
>>> starts by
>>> > fixing the raspberrypi-bcm2835-firmware driver, removing the need
>>> for DT
>>> > properties that are specified in bcm2835-rpi.dtsi but not
>>> documented in
>>> > the corresponding bindings. Patch 3/3 can then drop those properties,
>>> > getting rid of the warnings.
>>>
>>> since this series drops properties from the device tree, does anyone
>>> have the chance to test it with a recent U-Boot?
>>
>> I don't have U-Boot running with my RPi, so I would appreciate if
>> someone could help :-)
>
> Sorry for taking me so long to verify this.
>
> I think on RPi U-Boot side we are fine. API used when accessing Mbox
> device do not follow DM model and do not use DMA, but just access
> device directly using this nice macros phys_to_bus/bus_to_phys.
>
> I build new DTB files with this patch included and U-Boot build
> from the latest sources. No obvious issues on RPi3 and RPi4.
> Devices boot fine.
Thanks you, Laurent and Ivan

Reviewed-by: Stefan Wahren <wahrenst@gmx.net>
>
> Regards,
> Ivan

Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

[Laurent Pinchart]

Hello,

On Tue, Apr 02, 2024 at 09:52:06PM +0200, Stefan Wahren wrote:
> Am 02.04.24 um 10:58 schrieb Ivan T. Ivanov:
> > On 2024-03-28 01:37, Laurent Pinchart wrote:
> >> On Wed, Mar 27, 2024 at 07:49:38AM +0100, Stefan Wahren wrote:
> >>> Hi,
> >>>
> >>> [add Peter and Ivan]
> >>>
> >>> Am 26.03.24 um 20:58 schrieb Laurent Pinchart:
> >>> > Hello,
> >>> >
> >>> > This small series includes a few drive-by fixes for DT validation
> >>> > errors.
> >>> >
> >>> > The first patch has been posted previously in v1 ([1], and now addresses
> >>> > a small review comment. I think it's good to go.
> >>> >
> >>> > The next two patches address the same issue as "[PATCH 1/2] dt-bindings:
> >>> > arm: bcm: raspberrypi,bcm2835-firmware: Add missing properties" ([2]),
> >>> > but this time with a (hopefully) correct approach. Patch 2/3 starts by
> >>> > fixing the raspberrypi-bcm2835-firmware driver, removing the need for DT
> >>> > properties that are specified in bcm2835-rpi.dtsi but not documented in
> >>> > the corresponding bindings. Patch 3/3 can then drop those properties,
> >>> > getting rid of the warnings.
> >>>
> >>> since this series drops properties from the device tree, does anyone
> >>> have the chance to test it with a recent U-Boot?
> >>
> >> I don't have U-Boot running with my RPi, so I would appreciate if
> >> someone could help :-)
> >
> > Sorry for taking me so long to verify this.
> >
> > I think on RPi U-Boot side we are fine. API used when accessing Mbox
> > device do not follow DM model and do not use DMA, but just access
> > device directly using this nice macros phys_to_bus/bus_to_phys.
> >
> > I build new DTB files with this patch included and U-Boot build
> > from the latest sources. No obvious issues on RPi3 and RPi4.
> > Devices boot fine.

Thank you for testing Ivan.

> Thanks you, Laurent and Ivan
> 
> Reviewed-by: Stefan Wahren <wahrenst@gmx.net>

Stefan, I'm quite unfamiliar with the Raspberry Pi upstreaming process
(despite having sent patches for ages :-)), do I understand correctly
that this patch will go through your tree, or do I need to work with
someone else to get it merged upstream ?

-- 
Regards,

Laurent Pinchart

Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

[Florian Fainelli]

On 4/2/24 13:08, Laurent Pinchart wrote:
> Hello,
> 
> On Tue, Apr 02, 2024 at 09:52:06PM +0200, Stefan Wahren wrote:
>> Am 02.04.24 um 10:58 schrieb Ivan T. Ivanov:
>>> On 2024-03-28 01:37, Laurent Pinchart wrote:
>>>> On Wed, Mar 27, 2024 at 07:49:38AM +0100, Stefan Wahren wrote:
>>>>> Hi,
>>>>>
>>>>> [add Peter and Ivan]
>>>>>
>>>>> Am 26.03.24 um 20:58 schrieb Laurent Pinchart:
>>>>>> Hello,
>>>>>>
>>>>>> This small series includes a few drive-by fixes for DT validation
>>>>>> errors.
>>>>>>
>>>>>> The first patch has been posted previously in v1 ([1], and now addresses
>>>>>> a small review comment. I think it's good to go.
>>>>>>
>>>>>> The next two patches address the same issue as "[PATCH 1/2] dt-bindings:
>>>>>> arm: bcm: raspberrypi,bcm2835-firmware: Add missing properties" ([2]),
>>>>>> but this time with a (hopefully) correct approach. Patch 2/3 starts by
>>>>>> fixing the raspberrypi-bcm2835-firmware driver, removing the need for DT
>>>>>> properties that are specified in bcm2835-rpi.dtsi but not documented in
>>>>>> the corresponding bindings. Patch 3/3 can then drop those properties,
>>>>>> getting rid of the warnings.
>>>>>
>>>>> since this series drops properties from the device tree, does anyone
>>>>> have the chance to test it with a recent U-Boot?
>>>>
>>>> I don't have U-Boot running with my RPi, so I would appreciate if
>>>> someone could help :-)
>>>
>>> Sorry for taking me so long to verify this.
>>>
>>> I think on RPi U-Boot side we are fine. API used when accessing Mbox
>>> device do not follow DM model and do not use DMA, but just access
>>> device directly using this nice macros phys_to_bus/bus_to_phys.
>>>
>>> I build new DTB files with this patch included and U-Boot build
>>> from the latest sources. No obvious issues on RPi3 and RPi4.
>>> Devices boot fine.
> 
> Thank you for testing Ivan.
> 
>> Thanks you, Laurent and Ivan
>>
>> Reviewed-by: Stefan Wahren <wahrenst@gmx.net>
> 
> Stefan, I'm quite unfamiliar with the Raspberry Pi upstreaming process
> (despite having sent patches for ages :-)), do I understand correctly
> that this patch will go through your tree, or do I need to work with
> someone else to get it merged upstream ?

I will be taking those via the Broadcom SoC tree.
-- 
Florian

Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

[Laurent Pinchart]

Hi Florian,

On Tue, Apr 02, 2024 at 01:18:35PM -0700, Florian Fainelli wrote:
> On 4/2/24 13:08, Laurent Pinchart wrote:
> > On Tue, Apr 02, 2024 at 09:52:06PM +0200, Stefan Wahren wrote:
> >> Am 02.04.24 um 10:58 schrieb Ivan T. Ivanov:
> >>> On 2024-03-28 01:37, Laurent Pinchart wrote:
> >>>> On Wed, Mar 27, 2024 at 07:49:38AM +0100, Stefan Wahren wrote:
> >>>>> Hi,
> >>>>>
> >>>>> [add Peter and Ivan]
> >>>>>
> >>>>> Am 26.03.24 um 20:58 schrieb Laurent Pinchart:
> >>>>>> Hello,
> >>>>>>
> >>>>>> This small series includes a few drive-by fixes for DT validation
> >>>>>> errors.
> >>>>>>
> >>>>>> The first patch has been posted previously in v1 ([1], and now addresses
> >>>>>> a small review comment. I think it's good to go.
> >>>>>>
> >>>>>> The next two patches address the same issue as "[PATCH 1/2] dt-bindings:
> >>>>>> arm: bcm: raspberrypi,bcm2835-firmware: Add missing properties" ([2]),
> >>>>>> but this time with a (hopefully) correct approach. Patch 2/3 starts by
> >>>>>> fixing the raspberrypi-bcm2835-firmware driver, removing the need for DT
> >>>>>> properties that are specified in bcm2835-rpi.dtsi but not documented in
> >>>>>> the corresponding bindings. Patch 3/3 can then drop those properties,
> >>>>>> getting rid of the warnings.
> >>>>>
> >>>>> since this series drops properties from the device tree, does anyone
> >>>>> have the chance to test it with a recent U-Boot?
> >>>>
> >>>> I don't have U-Boot running with my RPi, so I would appreciate if
> >>>> someone could help :-)
> >>>
> >>> Sorry for taking me so long to verify this.
> >>>
> >>> I think on RPi U-Boot side we are fine. API used when accessing Mbox
> >>> device do not follow DM model and do not use DMA, but just access
> >>> device directly using this nice macros phys_to_bus/bus_to_phys.
> >>>
> >>> I build new DTB files with this patch included and U-Boot build
> >>> from the latest sources. No obvious issues on RPi3 and RPi4.
> >>> Devices boot fine.
> > 
> > Thank you for testing Ivan.
> > 
> >> Thanks you, Laurent and Ivan
> >>
> >> Reviewed-by: Stefan Wahren <wahrenst@gmx.net>
> > 
> > Stefan, I'm quite unfamiliar with the Raspberry Pi upstreaming process
> > (despite having sent patches for ages :-)), do I understand correctly
> > that this patch will go through your tree, or do I need to work with
> > someone else to get it merged upstream ?
> 
> I will be taking those via the Broadcom SoC tree.

Thank you.

If there's a chance to include patches 05/10, 07/10, 08/10 and 09/10
from [1] at the same time, that would be great :-)

[1] https://lore.kernel.org/linux-media/20240402000424.4650-1-laurent.pinchart@ideasonboard.com

-- 
Regards,

Laurent Pinchart

Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

[Florian Fainelli]

[-- Attachment #1: Type: text/plain, Size: 2757 bytes --]

On 4/2/24 13:32, Laurent Pinchart wrote:
> Hi Florian,
> 
> On Tue, Apr 02, 2024 at 01:18:35PM -0700, Florian Fainelli wrote:
>> On 4/2/24 13:08, Laurent Pinchart wrote:
>>> On Tue, Apr 02, 2024 at 09:52:06PM +0200, Stefan Wahren wrote:
>>>> Am 02.04.24 um 10:58 schrieb Ivan T. Ivanov:
>>>>> On 2024-03-28 01:37, Laurent Pinchart wrote:
>>>>>> On Wed, Mar 27, 2024 at 07:49:38AM +0100, Stefan Wahren wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> [add Peter and Ivan]
>>>>>>>
>>>>>>> Am 26.03.24 um 20:58 schrieb Laurent Pinchart:
>>>>>>>> Hello,
>>>>>>>>
>>>>>>>> This small series includes a few drive-by fixes for DT validation
>>>>>>>> errors.
>>>>>>>>
>>>>>>>> The first patch has been posted previously in v1 ([1], and now addresses
>>>>>>>> a small review comment. I think it's good to go.
>>>>>>>>
>>>>>>>> The next two patches address the same issue as "[PATCH 1/2] dt-bindings:
>>>>>>>> arm: bcm: raspberrypi,bcm2835-firmware: Add missing properties" ([2]),
>>>>>>>> but this time with a (hopefully) correct approach. Patch 2/3 starts by
>>>>>>>> fixing the raspberrypi-bcm2835-firmware driver, removing the need for DT
>>>>>>>> properties that are specified in bcm2835-rpi.dtsi but not documented in
>>>>>>>> the corresponding bindings. Patch 3/3 can then drop those properties,
>>>>>>>> getting rid of the warnings.
>>>>>>>
>>>>>>> since this series drops properties from the device tree, does anyone
>>>>>>> have the chance to test it with a recent U-Boot?
>>>>>>
>>>>>> I don't have U-Boot running with my RPi, so I would appreciate if
>>>>>> someone could help :-)
>>>>>
>>>>> Sorry for taking me so long to verify this.
>>>>>
>>>>> I think on RPi U-Boot side we are fine. API used when accessing Mbox
>>>>> device do not follow DM model and do not use DMA, but just access
>>>>> device directly using this nice macros phys_to_bus/bus_to_phys.
>>>>>
>>>>> I build new DTB files with this patch included and U-Boot build
>>>>> from the latest sources. No obvious issues on RPi3 and RPi4.
>>>>> Devices boot fine.
>>>
>>> Thank you for testing Ivan.
>>>
>>>> Thanks you, Laurent and Ivan
>>>>
>>>> Reviewed-by: Stefan Wahren <wahrenst@gmx.net>
>>>
>>> Stefan, I'm quite unfamiliar with the Raspberry Pi upstreaming process
>>> (despite having sent patches for ages :-)), do I understand correctly
>>> that this patch will go through your tree, or do I need to work with
>>> someone else to get it merged upstream ?
>>
>> I will be taking those via the Broadcom SoC tree.
> 
> Thank you.
> 
> If there's a chance to include patches 05/10, 07/10, 08/10 and 09/10
> from [1] at the same time, that would be great :-)
> 
> [1] https://lore.kernel.org/linux-media/20240402000424.4650-1-laurent.pinchart@ideasonboard.com
> 

Yes, now done, thanks!
-- 
Florian


[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/pkcs7-signature, Size: 4221 bytes --]

Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

[Stefan Wahren]

Hi Laurent,

Am 02.04.24 um 22:08 schrieb Laurent Pinchart:
> Hello,
>
...
> Stefan, I'm quite unfamiliar with the Raspberry Pi upstreaming process
> (despite having sent patches for ages :-)), do I understand correctly
> that this patch will go through your tree, or do I need to work with
> someone else to get it merged upstream ?
>
i'm not the maintainer, but i'm trying to help. Florian is the
maintainer, so i would expect this series goes through his tree. So
MAINTAINERS file is correct here.

Re: [PATCH v2 0/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Drive-by fixes

[Florian Fainelli]

On 4/2/24 01:58, Ivan T. Ivanov wrote:
> 
> Hi,
> 
> On 2024-03-28 01:37, Laurent Pinchart wrote:
>> On Wed, Mar 27, 2024 at 07:49:38AM +0100, Stefan Wahren wrote:
>>> Hi,
>>>
>>> [add Peter and Ivan]
>>>
>>> Am 26.03.24 um 20:58 schrieb Laurent Pinchart:
>>> > Hello,
>>> >
>>> > This small series includes a few drive-by fixes for DT validation
>>> > errors.
>>> >
>>> > The first patch has been posted previously in v1 ([1], and now 
>>> addresses
>>> > a small review comment. I think it's good to go.
>>> >
>>> > The next two patches address the same issue as "[PATCH 1/2] 
>>> dt-bindings:
>>> > arm: bcm: raspberrypi,bcm2835-firmware: Add missing properties" ([2]),
>>> > but this time with a (hopefully) correct approach. Patch 2/3 starts by
>>> > fixing the raspberrypi-bcm2835-firmware driver, removing the need 
>>> for DT
>>> > properties that are specified in bcm2835-rpi.dtsi but not 
>>> documented in
>>> > the corresponding bindings. Patch 3/3 can then drop those properties,
>>> > getting rid of the warnings.
>>>
>>> since this series drops properties from the device tree, does anyone
>>> have the chance to test it with a recent U-Boot?
>>
>> I don't have U-Boot running with my RPi, so I would appreciate if
>> someone could help :-)
> 
> Sorry for taking me so long to verify this.
> 
> I think on RPi U-Boot side we are fine. API used when accessing Mbox
> device do not follow DM model and do not use DMA, but just access
> device directly using this nice macros phys_to_bus/bus_to_phys.
> 
> I build new DTB files with this patch included and U-Boot build
> from the latest sources. No obvious issues on RPi3 and RPi4.
> Devices boot fine.

Can I add this as a Tested-by tag from you while applying then?
-- 
Florian