diff mbox series

[1/5] dt-bindings: media: mtk-vcodec: Add dma-ranges property

Message ID 20210203083752.12586-2-irui.wang@mediatek.com (mailing list archive)
State New, archived
Headers show
Series Support H264 4K on MT8192 | expand

Commit Message

Irui Wang Feb. 3, 2021, 8:37 a.m. UTC
Adds dma-ranges property for DMA addresses translation.

Signed-off-by: Irui Wang <irui.wang@mediatek.com>
---
 Documentation/devicetree/bindings/media/mediatek-vcodec.txt | 2 ++
 1 file changed, 2 insertions(+)

Comments

Rob Herring Feb. 10, 2021, 10:53 p.m. UTC | #1
On Wed, Feb 03, 2021 at 04:37:48PM +0800, Irui Wang wrote:
> Adds dma-ranges property for DMA addresses translation.
> 
> Signed-off-by: Irui Wang <irui.wang@mediatek.com>
> ---
>  Documentation/devicetree/bindings/media/mediatek-vcodec.txt | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> index f85276e629bf..e4644f8caee9 100644
> --- a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> +++ b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> @@ -23,6 +23,8 @@ Required properties:
>  - iommus : should point to the respective IOMMU block with master port as
>    argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
>    for details.
> +- dma-ranges : describes how the physical address space of the IOMMU maps
> +  to memory.

dma-ranges is supposed to be in a bus/parent node.

>  One of the two following nodes:
>  - mediatek,vpu : the node of the video processor unit, if using VPU.
>  - mediatek,scp : the node of the SCP unit, if using SCP.
> -- 
> 2.25.1
>
Irui Wang March 1, 2021, 6:45 a.m. UTC | #2
On Wed, 2021-02-10 at 16:53 -0600, Rob Herring wrote:
> On Wed, Feb 03, 2021 at 04:37:48PM +0800, Irui Wang wrote:
> > Adds dma-ranges property for DMA addresses translation.
> > 
> > Signed-off-by: Irui Wang <irui.wang@mediatek.com>
> > ---
> >  Documentation/devicetree/bindings/media/mediatek-vcodec.txt | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> > index f85276e629bf..e4644f8caee9 100644
> > --- a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> > +++ b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> > @@ -23,6 +23,8 @@ Required properties:
> >  - iommus : should point to the respective IOMMU block with master port as
> >    argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
> >    for details.
> > +- dma-ranges : describes how the physical address space of the IOMMU maps
> > +  to memory.
> 
> dma-ranges is supposed to be in a bus/parent node.
Dear Rob,

The mt8192 iommu support 0~16GB iova. We separate it to four banks:
0~4G; 4G~8G; 8G~12G; 12G~16G.

The "dma-ranges" could be used to adjust the bank we locate.
If we don't set this property. The default range always is 0~4G.

Here we don't have actual bus/parent concept here.  And the iova
requirement is for our HW. Thus put the property in our node.

Is this OK? If this is ok for you, I will put this message in the commit
message and binding in next version.

Regards
> 
> >  One of the two following nodes:
> >  - mediatek,vpu : the node of the video processor unit, if using VPU.
> >  - mediatek,scp : the node of the SCP unit, if using SCP.
> > -- 
> > 2.25.1
> >
Hans Verkuil April 29, 2021, 11:15 a.m. UTC | #3
Hi Rob,

On 01/03/2021 07:45, Irui Wang wrote:
> On Wed, 2021-02-10 at 16:53 -0600, Rob Herring wrote:
>> On Wed, Feb 03, 2021 at 04:37:48PM +0800, Irui Wang wrote:
>>> Adds dma-ranges property for DMA addresses translation.
>>>
>>> Signed-off-by: Irui Wang <irui.wang@mediatek.com>
>>> ---
>>>  Documentation/devicetree/bindings/media/mediatek-vcodec.txt | 2 ++
>>>  1 file changed, 2 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
>>> index f85276e629bf..e4644f8caee9 100644
>>> --- a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
>>> +++ b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
>>> @@ -23,6 +23,8 @@ Required properties:
>>>  - iommus : should point to the respective IOMMU block with master port as
>>>    argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
>>>    for details.
>>> +- dma-ranges : describes how the physical address space of the IOMMU maps
>>> +  to memory.
>>
>> dma-ranges is supposed to be in a bus/parent node.
> Dear Rob,
> 
> The mt8192 iommu support 0~16GB iova. We separate it to four banks:
> 0~4G; 4G~8G; 8G~12G; 12G~16G.
> 
> The "dma-ranges" could be used to adjust the bank we locate.
> If we don't set this property. The default range always is 0~4G.
> 
> Here we don't have actual bus/parent concept here.  And the iova
> requirement is for our HW. Thus put the property in our node.
> 
> Is this OK? If this is ok for you, I will put this message in the commit
> message and binding in next version.

Can you answer Irui's question? Just a reminder...

Much appreciated!

Regards,

	Hans

> 
> Regards
>>
>>>  One of the two following nodes:
>>>  - mediatek,vpu : the node of the video processor unit, if using VPU.
>>>  - mediatek,scp : the node of the SCP unit, if using SCP.
>>> -- 
>>> 2.25.1
>>>
>
Irui Wang May 17, 2021, 7:51 a.m. UTC | #4
Dear Hans, Rob and Maintainers,

Much appreciated for reviewing this patchset, we have sent PATCH-V3 for
the patchset with Rob's comments:
https://patchwork.kernel.org/project/linux-mediatek/cover/20210412124555.26897-1-irui.wang@mediatek.com/

Just Gentle ping for this V3 patch.

Thanks,
Best Regards

On Thu, 2021-04-29 at 13:15 +0200, Hans Verkuil wrote:
> Hi Rob,
> 
> On 01/03/2021 07:45, Irui Wang wrote:
> > On Wed, 2021-02-10 at 16:53 -0600, Rob Herring wrote:
> >> On Wed, Feb 03, 2021 at 04:37:48PM +0800, Irui Wang wrote:
> >>> Adds dma-ranges property for DMA addresses translation.
> >>>
> >>> Signed-off-by: Irui Wang <irui.wang@mediatek.com>
> >>> ---
> >>>  Documentation/devicetree/bindings/media/mediatek-vcodec.txt | 2 ++
> >>>  1 file changed, 2 insertions(+)
> >>>
> >>> diff --git a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> >>> index f85276e629bf..e4644f8caee9 100644
> >>> --- a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> >>> +++ b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> >>> @@ -23,6 +23,8 @@ Required properties:
> >>>  - iommus : should point to the respective IOMMU block with master port as
> >>>    argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
> >>>    for details.
> >>> +- dma-ranges : describes how the physical address space of the IOMMU maps
> >>> +  to memory.
> >>
> >> dma-ranges is supposed to be in a bus/parent node.
> > Dear Rob,
> > 
> > The mt8192 iommu support 0~16GB iova. We separate it to four banks:
> > 0~4G; 4G~8G; 8G~12G; 12G~16G.
> > 
> > The "dma-ranges" could be used to adjust the bank we locate.
> > If we don't set this property. The default range always is 0~4G.
> > 
> > Here we don't have actual bus/parent concept here.  And the iova
> > requirement is for our HW. Thus put the property in our node.
> > 
> > Is this OK? If this is ok for you, I will put this message in the commit
> > message and binding in next version.
> 
> Can you answer Irui's question? Just a reminder...
> 
> Much appreciated!
> 
> Regards,
> 
> 	Hans
> 
> > 
> > Regards
> >>
> >>>  One of the two following nodes:
> >>>  - mediatek,vpu : the node of the video processor unit, if using VPU.
> >>>  - mediatek,scp : the node of the SCP unit, if using SCP.
> >>> -- 
> >>> 2.25.1
> >>>
> > 
>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
index f85276e629bf..e4644f8caee9 100644
--- a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
+++ b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
@@ -23,6 +23,8 @@  Required properties:
 - iommus : should point to the respective IOMMU block with master port as
   argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
   for details.
+- dma-ranges : describes how the physical address space of the IOMMU maps
+  to memory.
 One of the two following nodes:
 - mediatek,vpu : the node of the video processor unit, if using VPU.
 - mediatek,scp : the node of the SCP unit, if using SCP.