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Message-ID: <c1a2ba5b-4cd9-362b-5a4e-e95a6bf27b3e@linaro.org>
Date: Sat, 4 Mar 2023 16:59:19 +0000
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>,
Rob Clark <robdclark@...il.com>,
Abhinav Kumar <quic_abhinavk@...cinc.com>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Krishna Manikandan <quic_mkrishn@...cinc.com>
Cc: Rob Herring <robh@...nel.org>, linux-arm-msm@...r.kernel.org,
dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/2] dt-bindings: display/msm: dsi-controller-main: Fix
deprecated compatible
On 04/03/2023 15:55, Konrad Dybcio wrote:
> The point of the previous cleanup was to disallow "qcom,mdss-dsi-ctrl"
> alone. This however didn't quite work out and the property became
> undocumented instead of deprecated. Fix that.
>
> Fixes: 0c0f65c6dd44 ("dt-bindings: msm: dsi-controller-main: Add compatible strings for every current SoC")
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
> Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml
> index f195530ae964..d534451c8f7f 100644
> --- a/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml
> +++ b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml
> @@ -35,7 +35,7 @@ properties:
> - items:
> - enum:
> - qcom,dsi-ctrl-6g-qcm2290
> - - const: qcom,mdss-dsi-ctrl
> + - qcom,mdss-dsi-ctrl # This should always come with an SoC-specific compatible
> deprecated: true
>
> reg:
>
This change would make compatible = "qcom,dsi-ctrl-6g-qcm2290",
"qcom,mdss-dsi-ctrl"; break though
Take this example, I'm going to use 8916 because its easy.
If we apply your change to dsi-controller-main.yaml
diff --git
a/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml
b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml
index e75a3efe4dace..e93c16431f0a1 100644
--- a/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml
+++ b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml
@@ -34,7 +34,7 @@ properties:
- items:
- enum:
- dsi-ctrl-6g-qcm2290
- - const: qcom,mdss-dsi-ctrl
+ - qcom,mdss-dsi-ctrl
deprecated: true
reg:
and then make 8916 == compatible = "qcom,dsi-ctrl-6g-qcm2290",
"qcom,mdss-dsi-ctrl";
diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi
b/arch/arm64/boot/dts/qcom/msm8916.dtsi
index 0733c2f4f3798..7332b5f66a09d 100644
--- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
@@ -1094,7 +1094,7 @@ mdp5_intf1_out: endpoint {
};
dsi0: dsi@...8000 {
- compatible = "qcom,msm8916-dsi-ctrl",
+ compatible = "dsi-ctrl-6g-qcm2290",
"qcom,mdss-dsi-ctrl";
reg = <0x01a98000 0x25c>;
reg-names = "dsi_ctrl";
arch/arm64/boot/dts/qcom/apq8016-sbc.dtb: dsi@...8000: compatible:
'oneOf' conditional failed, one must be fixed:
['dsi-ctrl-6g-qcm2290', 'qcom,mdss-dsi-ctrl'] is too long
so compatible = "qcom,dsi-ctrl-6g-qcm2290", "qcom,mdss-dsi-ctrl"; is now
invalid, not deprecated.
This change also makes compatible = "qcom,dsi-ctrl-6g-qcm2290" or
compatible = "qcom,mdss-dsi-ctrl" standalone valid compatible which is
again not what we want.
- enum:
- qcom,dsi-ctrl-6g-qcm2290
- qcom,mdss-dsi-ctrl
means either "qcom,dsi-ctrl-6g-qcm2290" or "qcom,mdss-dsi-ctrl" are
valid compat strings...
As an example if you apply your change and then change the msm8916.dtsi
to the below
diff --git
a/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml
b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml
index e75a3efe4dace..e93c16431f0a1 100644
--- a/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml
+++ b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml
@@ -34,7 +34,7 @@ properties:
- items:
- enum:
- dsi-ctrl-6g-qcm2290
- - const: qcom,mdss-dsi-ctrl
+ - qcom,mdss-dsi-ctrl
deprecated: true
reg:
diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi
b/arch/arm64/boot/dts/qcom/msm8916.dtsi
index 0733c2f4f3798..829fbe05b5713 100644
--- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
@@ -1094,8 +1094,7 @@ mdp5_intf1_out: endpoint {
};
dsi0: dsi@...8000 {
- compatible = "qcom,msm8916-dsi-ctrl",
- "qcom,mdss-dsi-ctrl";
+ compatible = "qcom,mdss-dsi-ctrl";
reg = <0x01a98000 0x25c>;
reg-names = "dsi_ctrl";
Then test it with
make O=$BUILDDIR DT_DOC_CHECKER=$DT_DOC_CHECKER
DT_EXTRACT_EX=$DT_EXTRACT_EX DT_MK_SCHEMA=$DT_MK_SCHEMA
DT_CHECKER=$DT_CHECKER CHECKER_FLAGS=-W=1 CHECK_DTBS=y qcom/apq8016-sbc.dtb
you'll see no error. However if you just do this
diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi
b/arch/arm64/boot/dts/qcom/msm8916.dtsi
index 0733c2f4f3798..829fbe05b5713 100644
--- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
@@ -1094,8 +1094,7 @@ mdp5_intf1_out: endpoint {
};
dsi0: dsi@...8000 {
- compatible = "qcom,msm8916-dsi-ctrl",
- "qcom,mdss-dsi-ctrl";
+ compatible = "qcom,mdss-dsi-ctrl";
reg = <0x01a98000 0x25c>;
reg-names = "dsi_ctrl";
and run the same test you get
apq8016-sbc.dtb: dsi@...8000: compatible: 'oneOf' conditional failed,
one must be fixed:
['qcom,mdss-dsi-ctrl'] is too short
'qcom,mdss-dsi-ctrl' is not one of ['qcom,apq8064-dsi-ctrl',
'qcom,msm8916-dsi-ctrl', 'qcom,msm8953-dsi-ctrl',
'qcom,msm8974-dsi-ctrl', 'qcom,msm8996-dsi-ctrl',
'qcom,msm8998-dsi-ctrl', 'qcom,qcm2290-dsi-ctrl',
'qcom,sc7180-dsi-ctrl', 'qcom,sc7280-dsi-ctrl', 'qcom,sdm660-dsi-ctrl',
'qcom,sdm845-dsi-ctrl', 'qcom,sm8150-dsi-ctrl', 'qcom,sm8250-dsi-ctrl',
'qcom,sm8350-dsi-ctrl', 'qcom,sm8450-dsi-ctrl', 'qcom,sm8550-dsi-ctrl']
---
bod
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