[PATCH v2 0/2] arm64: mediatek: Enable efuse GPU speed bin post-processing

[PATCH v2 0/2] arm64: mediatek: Enable efuse GPU speed bin post-processing

[Chen-Yu Tsai]

Hi everyone,

This is v2 of the MT8188 efuse GPU speed bin post-processing enablement
patches. In v1 [1] the change was made to the driver. Angelo, the platform
maintainer believes the change should be made to the DT binding instead
[2]. v2 adopts Angelo's argument.

Patch 1 updates the efuse DT binding so that MT8186 is a base compatible
with no fallback, and MT8188 falls back to MT8186.

Patch 2 updates the MT8188 DT to follow the new binding.

If possible I would like to see both patches merged through the soc
tree once the DT binding maintainers give an ack. This avoids prolonged
waiting for the binding changes to land and uncertainty about whether
things have fully landed or not.


Thanks
ChenYu

[1] https://lore.kernel.org/all/20241223100648.2166754-1-wenst@chromium.org/
[2] https://lore.kernel.org/all/11028242-afe4-474a-9d76-cd1bd9208987@collabora.com/

Chen-Yu Tsai (2):
  dt-bindings: nvmem: mediatek: efuse: split MT8186/MT8188 from base
    version
  arm64: dts: mediatek: mt8188: Change efuse fallback compatible to
    mt8186

 .../bindings/nvmem/mediatek,efuse.yaml          | 17 +++++++++++++++--
 arch/arm64/boot/dts/mediatek/mt8188.dtsi        |  2 +-
 2 files changed, 16 insertions(+), 3 deletions(-)

-- 
2.50.0.rc0.604.gd4ff7b7c86-goog

[PATCH v2 1/2] dt-bindings: nvmem: mediatek: efuse: split MT8186/MT8188 from base version

[Chen-Yu Tsai]

On MT8186 and MT8188 one of the NVMEM cells contains the GPU speed bin
value. In combination with the GPU OPP bindings, on these two platforms
there is an implied scheme of converting the cell value to what the GPU
OPP "opp-supported-hw" property matches. This does not apply to the base
mediatek,efuse hardware, nor does it apply to any of the other platforms
that do not have the GPU speed bin cell. The platform maintainer argues
that this makes the compatibles incompatible with the base
"mediatek,efuse" compatible, as shown in the link given.

Deprecate the MT8186/MT8188 + "mediatek,efuse" combination, and add
new entries with MT8186 being the base model and MT8188 falling back
to MT8186.

Link: https://lore.kernel.org/all/11028242-afe4-474a-9d76-cd1bd9208987@collabora.com/
Fixes: ff1df1886f43 ("dt-bindings: nvmem: mediatek: efuse: Add support for MT8188")
Cc: Johnson Wang <johnson.wang@mediatek.com>
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 .../bindings/nvmem/mediatek,efuse.yaml          | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/nvmem/mediatek,efuse.yaml b/Documentation/devicetree/bindings/nvmem/mediatek,efuse.yaml
index 32b8c1eb4e80..4dc0d42df3e6 100644
--- a/Documentation/devicetree/bindings/nvmem/mediatek,efuse.yaml
+++ b/Documentation/devicetree/bindings/nvmem/mediatek,efuse.yaml
@@ -24,6 +24,21 @@ properties:
 
   compatible:
     oneOf:
+      - items:
+          - const: mediatek,mt8188-efuse
+          - const: mediatek,mt8186-efuse
+      - const: mediatek,mt8186-efuse
+
+      - items:
+          - enum:
+              - mediatek,mt8186-efuse
+              - mediatek,mt8188-efuse
+          - const: mediatek,efuse
+        deprecated: true
+        description: Some compatibles also imply a decoding scheme for the
+          "gpu-speedbin" cell, and thus are not backward compatible to the
+          generic "mediatek,efuse" compatible.
+
       - items:
           - enum:
               - mediatek,mt7622-efuse
@@ -33,8 +48,6 @@ properties:
               - mediatek,mt7988-efuse
               - mediatek,mt8173-efuse
               - mediatek,mt8183-efuse
-              - mediatek,mt8186-efuse
-              - mediatek,mt8188-efuse
               - mediatek,mt8192-efuse
               - mediatek,mt8195-efuse
               - mediatek,mt8516-efuse
-- 
2.50.0.rc0.604.gd4ff7b7c86-goog

[PATCH v2 2/2] arm64: dts: mediatek: mt8188: Change efuse fallback compatible to mt8186

[Chen-Yu Tsai]

The efuse block in the MT8188 contains the GPU speed bin cell, and like
the MT8186 one, has the same conversion scheme to work with the GPU OPP
binding. This was reflected in a corresponding change to the efuse DT
binding.

Change the fallback compatible of the MT8188's efuse block from the
generic one to the MT8186 one. This also makes GPU DVFS work properly.

Fixes: d39aacd1021a ("arm64: dts: mediatek: mt8188: add lvts definitions")
Fixes: 50e7592cb696 ("arm64: dts: mediatek: mt8188: Add GPU speed bin NVMEM cells")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 arch/arm64/boot/dts/mediatek/mt8188.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8188.dtsi b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
index 202478407727..90c388f1890f 100644
--- a/arch/arm64/boot/dts/mediatek/mt8188.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
@@ -2183,7 +2183,7 @@ imp_iic_wrap_en: clock-controller@11ec2000 {
 		};
 
 		efuse: efuse@11f20000 {
-			compatible = "mediatek,mt8188-efuse", "mediatek,efuse";
+			compatible = "mediatek,mt8188-efuse", "mediatek,mt8186-efuse";
 			reg = <0 0x11f20000 0 0x1000>;
 			#address-cells = <1>;
 			#size-cells = <1>;
-- 
2.50.0.rc0.604.gd4ff7b7c86-goog

Re: [PATCH v2 1/2] dt-bindings: nvmem: mediatek: efuse: split MT8186/MT8188 from base version

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 1132 bytes --]

On Tue, Jun 10, 2025 at 02:34:29PM +0800, Chen-Yu Tsai wrote:
> On MT8186 and MT8188 one of the NVMEM cells contains the GPU speed bin
> value. In combination with the GPU OPP bindings, on these two platforms
> there is an implied scheme of converting the cell value to what the GPU
> OPP "opp-supported-hw" property matches. This does not apply to the base
> mediatek,efuse hardware, nor does it apply to any of the other platforms
> that do not have the GPU speed bin cell. The platform maintainer argues
> that this makes the compatibles incompatible with the base
> "mediatek,efuse" compatible, as shown in the link given.
> 
> Deprecate the MT8186/MT8188 + "mediatek,efuse" combination, and add
> new entries with MT8186 being the base model and MT8188 falling back
> to MT8186.
> 
> Link: https://lore.kernel.org/all/11028242-afe4-474a-9d76-cd1bd9208987@collabora.com/
> Fixes: ff1df1886f43 ("dt-bindings: nvmem: mediatek: efuse: Add support for MT8188")
> Cc: Johnson Wang <johnson.wang@mediatek.com>
> Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>

Acked-by: Conor Dooley <conor.dooley@microchip.com>

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Re: [PATCH v2 0/2] arm64: mediatek: Enable efuse GPU speed bin post-processing

[Chen-Yu Tsai]

Hi Angelo,

On Tue, Jun 10, 2025 at 2:34 PM Chen-Yu Tsai <wenst@chromium.org> wrote:
>
> Hi everyone,
>
> This is v2 of the MT8188 efuse GPU speed bin post-processing enablement
> patches. In v1 [1] the change was made to the driver. Angelo, the platform
> maintainer believes the change should be made to the DT binding instead
> [2]. v2 adopts Angelo's argument.
>
> Patch 1 updates the efuse DT binding so that MT8186 is a base compatible
> with no fallback, and MT8188 falls back to MT8186.
>
> Patch 2 updates the MT8188 DT to follow the new binding.
>
> If possible I would like to see both patches merged through the soc
> tree once the DT binding maintainers give an ack. This avoids prolonged
> waiting for the binding changes to land and uncertainty about whether
> things have fully landed or not.
>
>
> Thanks
> ChenYu
>
> [1] https://lore.kernel.org/all/20241223100648.2166754-1-wenst@chromium.org/
> [2] https://lore.kernel.org/all/11028242-afe4-474a-9d76-cd1bd9208987@collabora.com/
>
> Chen-Yu Tsai (2):
>   dt-bindings: nvmem: mediatek: efuse: split MT8186/MT8188 from base
>     version
>   arm64: dts: mediatek: mt8188: Change efuse fallback compatible to
>     mt8186

Friendly ping. Please take a look and see if this scheme is to your liking.


Thanks
ChenYu

>  .../bindings/nvmem/mediatek,efuse.yaml          | 17 +++++++++++++++--
>  arch/arm64/boot/dts/mediatek/mt8188.dtsi        |  2 +-
>  2 files changed, 16 insertions(+), 3 deletions(-)
>
> --
> 2.50.0.rc0.604.gd4ff7b7c86-goog
>

Re: [PATCH v2 0/2] arm64: mediatek: Enable efuse GPU speed bin post-processing

[AngeloGioacchino Del Regno]

Il 01/07/25 11:15, Chen-Yu Tsai ha scritto:
> Hi Angelo,
> 
> On Tue, Jun 10, 2025 at 2:34 PM Chen-Yu Tsai <wenst@chromium.org> wrote:
>>
>> Hi everyone,
>>
>> This is v2 of the MT8188 efuse GPU speed bin post-processing enablement
>> patches. In v1 [1] the change was made to the driver. Angelo, the platform
>> maintainer believes the change should be made to the DT binding instead
>> [2]. v2 adopts Angelo's argument.
>>
>> Patch 1 updates the efuse DT binding so that MT8186 is a base compatible
>> with no fallback, and MT8188 falls back to MT8186.
>>
>> Patch 2 updates the MT8188 DT to follow the new binding.
>>
>> If possible I would like to see both patches merged through the soc
>> tree once the DT binding maintainers give an ack. This avoids prolonged
>> waiting for the binding changes to land and uncertainty about whether
>> things have fully landed or not.
>>
>>
>> Thanks
>> ChenYu
>>
>> [1] https://lore.kernel.org/all/20241223100648.2166754-1-wenst@chromium.org/
>> [2] https://lore.kernel.org/all/11028242-afe4-474a-9d76-cd1bd9208987@collabora.com/
>>
>> Chen-Yu Tsai (2):
>>    dt-bindings: nvmem: mediatek: efuse: split MT8186/MT8188 from base
>>      version
>>    arm64: dts: mediatek: mt8188: Change efuse fallback compatible to
>>      mt8186
> 
> Friendly ping. Please take a look and see if this scheme is to your liking.
> 

For the whole series

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

> 
> Thanks
> ChenYu
> 
>>   .../bindings/nvmem/mediatek,efuse.yaml          | 17 +++++++++++++++--
>>   arch/arm64/boot/dts/mediatek/mt8188.dtsi        |  2 +-
>>   2 files changed, 16 insertions(+), 3 deletions(-)
>>
>> --
>> 2.50.0.rc0.604.gd4ff7b7c86-goog
>>

Re: [PATCH v2 0/2] arm64: mediatek: Enable efuse GPU speed bin post-processing

[Chen-Yu Tsai]

Srinivas,

On Thu, Jul 3, 2025 at 7:48 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com> wrote:
>
> Il 01/07/25 11:15, Chen-Yu Tsai ha scritto:
> > Hi Angelo,
> >
> > On Tue, Jun 10, 2025 at 2:34 PM Chen-Yu Tsai <wenst@chromium.org> wrote:
> >>
> >> Hi everyone,
> >>
> >> This is v2 of the MT8188 efuse GPU speed bin post-processing enablement
> >> patches. In v1 [1] the change was made to the driver. Angelo, the platform
> >> maintainer believes the change should be made to the DT binding instead
> >> [2]. v2 adopts Angelo's argument.
> >>
> >> Patch 1 updates the efuse DT binding so that MT8186 is a base compatible
> >> with no fallback, and MT8188 falls back to MT8186.
> >>
> >> Patch 2 updates the MT8188 DT to follow the new binding.
> >>
> >> If possible I would like to see both patches merged through the soc
> >> tree once the DT binding maintainers give an ack. This avoids prolonged
> >> waiting for the binding changes to land and uncertainty about whether
> >> things have fully landed or not.
> >>
> >>
> >> Thanks
> >> ChenYu
> >>
> >> [1] https://lore.kernel.org/all/20241223100648.2166754-1-wenst@chromium.org/
> >> [2] https://lore.kernel.org/all/11028242-afe4-474a-9d76-cd1bd9208987@collabora.com/
> >>
> >> Chen-Yu Tsai (2):
> >>    dt-bindings: nvmem: mediatek: efuse: split MT8186/MT8188 from base
> >>      version
> >>    arm64: dts: mediatek: mt8188: Change efuse fallback compatible to
> >>      mt8186
> >
> > Friendly ping. Please take a look and see if this scheme is to your liking.
> >
>
> For the whole series
>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Could you merge  the DT binding patch so that we can merge the DT change
ahead of -rc6? Or alternatively could you give an Ack so both patches
go through the soc tree?


Thanks
ChenYu

Re: (subset) [PATCH v2 0/2] arm64: mediatek: Enable efuse GPU speed bin post-processing

[Srinivas Kandagatla]

On Tue, 10 Jun 2025 14:34:28 +0800, Chen-Yu Tsai wrote:
> This is v2 of the MT8188 efuse GPU speed bin post-processing enablement
> patches. In v1 [1] the change was made to the driver. Angelo, the platform
> maintainer believes the change should be made to the DT binding instead
> [2]. v2 adopts Angelo's argument.
> 
> Patch 1 updates the efuse DT binding so that MT8186 is a base compatible
> with no fallback, and MT8188 falls back to MT8186.
> 
> [...]

Applied, thanks!

[1/2] dt-bindings: nvmem: mediatek: efuse: split MT8186/MT8188 from base version
      commit: ce32f3cdfbc31dab626e20122e577f75ea46b940

Best regards,
-- 
Srinivas Kandagatla <srini@kernel.org>