Re: [PATCH 1/2] dt-bindings: soc: mediatek: add mdp3 mutex support for mt8186

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On 08/07/2022 10:14, allen-kh.cheng wrote:
Hi Angelo,

On Thu, 2022-07-07 at 12:59 +0200, AngeloGioacchino Del Regno wrote:
Il 07/07/22 12:41, Matthias Brugger ha scritto:


On 07/07/2022 10:52, AngeloGioacchino Del Regno wrote:
Il 05/07/22 14:26, Allen-KH Cheng ha scritto:
Add mdp3 mutex compatible for mt8186 SoC.

Signed-off-by: Allen-KH Cheng <allen-kh.cheng@xxxxxxxxxxxx>
Signed-off-by: Xiandong Wang <xiandong.wang@xxxxxxxxxxxx>


Please drop this commit. Adding a mdp3-mutex compatible is not
needed here.


Thanks for checking. We probably would need a fallback compatible.
We can only know
from the HW engineers that can confirm if the IP block is the same
as the disp
mutex or a different one.

I'll drop both patches for now until things got clear.


They're located in a different iospace from each other, but either
the platform
data needs to *not be* joined together, or if they're together, I
would not like
having two different compatible strings for essentially the same
thing.

I would at this point prefer dropping '-disp' from 'mediatek,mt8186-
disp-mutex'
so that we would be able to declare two 'mediatek,mt8186-mutex' in
devicetree...
...or simply have two mediatek,mt8186-disp-mutex (although logically
incorrect?).

Cheers,
Angelo


Thanks for your opinion.

They are two different hardwares for different address spaces.

I think we drop '-disp' from 'mediatek,mt8186-disp-mutex' will be
excessive because we also need to modify mutex node in all exited dts
files.

I prefer havingg two mediatek,mt8186-disp-mutex.

ex:
mutex: mutex@14001000 {
	compatible = "mediatek,mt8186-disp-mutex";
	..
}

mdp3_mutex0: mutex@1b001000 {
	compatible = "mediatek,mt8186-disp-mutex";
	...
}

What do you think?

I think that's an acceptable solution.

Regards,
Matthias


Best regards,
Allen

Regards,
Matthias

---
.../devicetree/bindings/soc/mediatek/mediatek,mutex.yaml
   | 1 +
   1 file changed, 1 insertion(+)

diff --git
a/Documentation/devicetree/bindings/soc/mediatek/mediatek,mutex
.yaml
b/Documentation/devicetree/bindings/soc/mediatek/mediatek,mutex
.yaml
index 627dcc3e8b32..234fa5dc07c2 100644
---
a/Documentation/devicetree/bindings/soc/mediatek/mediatek,mutex
.yaml
+++
b/Documentation/devicetree/bindings/soc/mediatek/mediatek,mutex
.yaml
@@ -30,6 +30,7 @@ properties:
         - mediatek,mt8173-disp-mutex
         - mediatek,mt8183-disp-mutex
         - mediatek,mt8186-disp-mutex
+      - mediatek,mt8186-mdp3-mutex
         - mediatek,mt8192-disp-mutex
         - mediatek,mt8195-disp-mutex









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