[PATCH v6 0/2] *** IT6505 driver read dt properties ***

[PATCH v6 0/2] *** IT6505 driver read dt properties ***

[allen]

This series let driver can read properties from dt to restrict dp output
bandwidth.

Changes in v3:
-Rename property name.

Changes in v4:
-Use data-lanes and link-frequencies instead of "ite,dp-output-data-lane-count" and "ite,dp-output-max-pixel-clock-mhz".

Changes in v5:
-Add a port and a endpoint.
-Move data-lanes property to the output endpoint.

Changes in v6:
-Modified data-lanes description by suggestion.

allen chen (2):
  dt-bindings: it6505: add properties to restrict output bandwidth
  drm/bridge: add it6505 driver to read data-lanes and link-frequencies
    from dt

 .../bindings/display/bridge/ite,it6505.yaml   | 68 ++++++++++++++--
 drivers/gpu/drm/bridge/ite-it6505.c           | 80 ++++++++++++++++++-
 2 files changed, 139 insertions(+), 9 deletions(-)

-- 
2.25.1

[PATCH v6 1/2] dt-bindings: it6505: add properties to restrict output bandwidth

[allen]

From: allen chen <allen.chen@ite.com.tw>

Add properties to restrict dp output data-lanes and clock.

Signed-off-by: Pin-Yen Lin <treapking@chromium.org>
Signed-off-by: Allen Chen <allen.chen@ite.com.tw>
---
 .../bindings/display/bridge/ite,it6505.yaml   | 68 +++++++++++++++++--
 1 file changed, 62 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
index 833d11b2303a7..b16a9d9127ddb 100644
--- a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
@@ -52,9 +52,49 @@ properties:
     maxItems: 1
     description: extcon specifier for the Power Delivery
 
-  port:
-    $ref: /schemas/graph.yaml#/properties/port
-    description: A port node pointing to DPI host port node
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: A port node pointing to DPI host port node
+
+        properties:
+          endpoint:
+            $ref: /schemas/graph.yaml#/$defs/endpoint-base
+            unevaluatedProperties: false
+
+            properties:
+              link-frequencies:
+                minItems: 1
+                maxItems: 1
+                description: Allowed max link frequencies in Hz
+
+      port@1:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: Video port for DP output
+
+        properties:
+          endpoint:
+            $ref: /schemas/graph.yaml#/$defs/endpoint-base
+            unevaluatedProperties: false
+
+            properties:
+              data-lanes:
+                minItems: 1
+                uniqueItems: true
+                items:
+                  - enum: [ 0, 1 ]
+                  - const: 1
+                  - const: 2
+                  - const: 3
+
+    required:
+      - port@0
+      - port@1
 
 required:
   - compatible
@@ -63,6 +103,7 @@ required:
   - interrupts
   - reset-gpios
   - extcon
+  - ports
 
 additionalProperties: false
 
@@ -85,9 +126,24 @@ examples:
             reset-gpios = <&pio 179 1>;
             extcon = <&usbc_extcon>;
 
-            port {
-                it6505_in: endpoint {
-                    remote-endpoint = <&dpi_out>;
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    reg = <0>;
+                    it6505_in: endpoint {
+                        remote-endpoint = <&dpi_out>;
+                        link-frequencies = /bits/ 64 <150000000>;
+                    };
+                };
+
+                port@1 {
+                    reg = <1>;
+                    it6505_out: endpoint {
+                        remote-endpoint = <&dp_in>;
+                        data-lanes = <0 1>;
+                    };
                 };
             };
         };
-- 
2.25.1

Re: [PATCH v6 1/2] dt-bindings: it6505: add properties to restrict output bandwidth

[Krzysztof Kozlowski]

On 26/10/2022 23:01, allen wrote:
> From: allen chen <allen.chen@ite.com.tw>
> 
> Add properties to restrict dp output data-lanes and clock.

This is a friendly reminder during the review process.

It seems my previous comments were not fully addressed. Maybe my
feedback got lost between the quotes, maybe you just forgot to apply it.
Please go back to the previous discussion and either implement all
requested changes or keep discussing them.

Thank you.

Rob asked - Commit msg should explain reason for breaking users.

> 
> Signed-off-by: Pin-Yen Lin <treapking@chromium.org>
> Signed-off-by: Allen Chen <allen.chen@ite.com.tw>
> ---
>  .../bindings/display/bridge/ite,it6505.yaml   | 68 +++++++++++++++++--
>  1 file changed, 62 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> index 833d11b2303a7..b16a9d9127ddb 100644
> --- a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> @@ -52,9 +52,49 @@ properties:
>      maxItems: 1
>      description: extcon specifier for the Power Delivery
>  
> -  port:
> -    $ref: /schemas/graph.yaml#/properties/port
> -    description: A port node pointing to DPI host port node
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description: A port node pointing to DPI host port node
> +
> +        properties:
> +          endpoint:
> +            $ref: /schemas/graph.yaml#/$defs/endpoint-base
> +            unevaluatedProperties: false
> +
> +            properties:
> +              link-frequencies:
> +                minItems: 1
> +                maxItems: 1
> +                description: Allowed max link frequencies in Hz
> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description: Video port for DP output
> +
> +        properties:
> +          endpoint:
> +            $ref: /schemas/graph.yaml#/$defs/endpoint-base
> +            unevaluatedProperties: false
> +
> +            properties:
> +              data-lanes:
> +                minItems: 1
> +                uniqueItems: true
> +                items:
> +                  - enum: [ 0, 1 ]
> +                  - const: 1
> +                  - const: 2
> +                  - const: 3
> +

This looks ok.

Best regards,
Krzysztof

RE: [PATCH v6 1/2] dt-bindings: it6505: add properties to restrict output bandwidth

[allen.chen]

hi

-----Original Message-----
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> 
Sent: Friday, October 28, 2022 9:59 AM
To: Allen Chen (陳柏宇) <allen.chen@ite.com.tw>
Cc: Pin-Yen Lin <treapking@chromium.org>; Jau-Chih Tseng (曾昭智) <Jau-Chih.Tseng@ite.com.tw>; Hermes Wu (吳佳宏) <Hermes.Wu@ite.com.tw>; Kenneth Hung (洪家倫) <Kenneth.Hung@ite.com.tw>; Andrzej Hajda <andrzej.hajda@intel.com>; Neil Armstrong <narmstrong@baylibre.com>; Robert Foss <robert.foss@linaro.org>; Laurent Pinchart <Laurent.pinchart@ideasonboard.com>; Jonas Karlman <jonas@kwiboo.se>; Jernej Skrabec <jernej.skrabec@gmail.com>; David Airlie <airlied@linux.ie>; Daniel Vetter <daniel@ffwll.ch>; Rob Herring <robh+dt@kernel.org>; Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>; open list:DRM DRIVERS <dri-devel@lists.freedesktop.org>; open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS <devicetree@vger.kernel.org>; open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v6 1/2] dt-bindings: it6505: add properties to restrict output bandwidth

On 26/10/2022 23:01, allen wrote:
> From: allen chen <allen.chen@ite.com.tw>
> 
> Add properties to restrict dp output data-lanes and clock.

This is a friendly reminder during the review process.

It seems my previous comments were not fully addressed. Maybe my feedback got lost between the quotes, maybe you just forgot to apply it.
Please go back to the previous discussion and either implement all requested changes or keep discussing them.

Thank you.

==> I am sorry I didn't find the missing advice you said. Could you explain it again?

Rob asked - Commit msg should explain reason for breaking users.

> 
> Signed-off-by: Pin-Yen Lin <treapking@chromium.org>
> Signed-off-by: Allen Chen <allen.chen@ite.com.tw>
> ---
>  .../bindings/display/bridge/ite,it6505.yaml   | 68 +++++++++++++++++--
>  1 file changed, 62 insertions(+), 6 deletions(-)
> 
> diff --git 
> a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml 
> b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> index 833d11b2303a7..b16a9d9127ddb 100644
> --- a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> @@ -52,9 +52,49 @@ properties:
>      maxItems: 1
>      description: extcon specifier for the Power Delivery
>  
> -  port:
> -    $ref: /schemas/graph.yaml#/properties/port
> -    description: A port node pointing to DPI host port node
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description: A port node pointing to DPI host port node
> +
> +        properties:
> +          endpoint:
> +            $ref: /schemas/graph.yaml#/$defs/endpoint-base
> +            unevaluatedProperties: false
> +
> +            properties:
> +              link-frequencies:
> +                minItems: 1
> +                maxItems: 1
> +                description: Allowed max link frequencies in Hz
> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description: Video port for DP output
> +
> +        properties:
> +          endpoint:
> +            $ref: /schemas/graph.yaml#/$defs/endpoint-base
> +            unevaluatedProperties: false
> +
> +            properties:
> +              data-lanes:
> +                minItems: 1
> +                uniqueItems: true
> +                items:
> +                  - enum: [ 0, 1 ]
> +                  - const: 1
> +                  - const: 2
> +                  - const: 3
> +

This looks ok.

Best regards,
Krzysztof

Re: [PATCH v6 1/2] dt-bindings: it6505: add properties to restrict output bandwidth

[Krzysztof Kozlowski]

On 02/11/2022 02:54, allen.chen@ite.com.tw wrote:
> On 26/10/2022 23:01, allen wrote:
>> From: allen chen <allen.chen@ite.com.tw>
>>
>> Add properties to restrict dp output data-lanes and clock.
> 
> This is a friendly reminder during the review process.
> 
> It seems my previous comments were not fully addressed. Maybe my feedback got lost between the quotes, maybe you just forgot to apply it.
> Please go back to the previous discussion and either implement all requested changes or keep discussing them.
> 
> Thank you.
> 
> ==> I am sorry I didn't find the missing advice you said. Could you explain it again?
> 
> Rob asked - Commit msg should explain reason for breaking users.

And where is the reason? I saw only one sentence "Add properties to
restrict dp output data-lanes and clock."

Best regards,
Krzysztof

RE: [PATCH v6 1/2] dt-bindings: it6505: add properties to restrict output bandwidth

[allen.chen]

hi

-----Original Message-----
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> 
Sent: Thursday, November 3, 2022 12:34 AM
To: Allen Chen (陳柏宇) <allen.chen@ite.com.tw>
Cc: treapking@chromium.org; Jau-Chih Tseng (曾昭智) <Jau-Chih.Tseng@ite.com.tw>; Hermes Wu (吳佳宏) <Hermes.Wu@ite.com.tw>; Kenneth Hung (洪家倫) <Kenneth.Hung@ite.com.tw>; andrzej.hajda@intel.com; narmstrong@baylibre.com; robert.foss@linaro.org; Laurent.pinchart@ideasonboard.com; jonas@kwiboo.se; jernej.skrabec@gmail.com; airlied@linux.ie; daniel@ffwll.ch; robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org; dri-devel@lists.freedesktop.org; devicetree@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 1/2] dt-bindings: it6505: add properties to restrict output bandwidth

On 02/11/2022 02:54, allen.chen@ite.com.tw wrote:
> On 26/10/2022 23:01, allen wrote:
>> From: allen chen <allen.chen@ite.com.tw>
>>
>> Add properties to restrict dp output data-lanes and clock.
> 
> This is a friendly reminder during the review process.
> 
> It seems my previous comments were not fully addressed. Maybe my feedback got lost between the quotes, maybe you just forgot to apply it.
> Please go back to the previous discussion and either implement all requested changes or keep discussing them.
> 
> Thank you.
> 
> ==> I am sorry I didn't find the missing advice you said. Could you explain it again?
> 
> Rob asked - Commit msg should explain reason for breaking users.

And where is the reason? I saw only one sentence "Add properties to restrict dp output data-lanes and clock."
==> I will add the commit msg in v7. Thanks for the suggestion.

Best regards,
Krzysztof