diff mbox series

[v2,1/2] dt-bindings: display: bridge: Add NXP i.MX93 parallel display format configuration

Message ID 20230531093206.3893469-2-victor.liu@nxp.com
State New
Headers
Series drm/bridge: imx: Add i.MX93 parallel display format configuration support |

Commit Message

Liu Ying May 31, 2023, 9:32 a.m. UTC 
  NXP i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX register which
configures parallel display format by using the "PARALLEL_DISP_FORMAT"
field. Add device tree bindings for the display format configuration.

Signed-off-by: Liu Ying <victor.liu@nxp.com>
---
v1->v2:
* No change.

 .../display/bridge/nxp,imx93-pdfc.yaml        | 78 +++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/nxp,imx93-pdfc.yaml

Comments

Krzysztof Kozlowski June 1, 2023, 5:45 p.m. UTC | #1 
On 31/05/2023 11:32, Liu Ying wrote:
> NXP i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX register which
> configures parallel display format by using the "PARALLEL_DISP_FORMAT"
> field. Add device tree bindings for the display format configuration.
> 
> Signed-off-by: Liu Ying <victor.liu@nxp.com>
> ---
> v1->v2:
> * No change.

How did you implement Rob's comment?

> 
>  .../display/bridge/nxp,imx93-pdfc.yaml        | 78 +++++++++++++++++++
>  1 file changed, 78 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/nxp,imx93-pdfc.yaml
> 


Best regards,
Krzysztof
Ying Liu June 2, 2023, 3:54 a.m. UTC | #2 
On Fri, Jun 2, 2023 at 1:45 AM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 31/05/2023 11:32, Liu Ying wrote:
> > NXP i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX register which
> > configures parallel display format by using the "PARALLEL_DISP_FORMAT"
> > field. Add device tree bindings for the display format configuration.
> >
> > Signed-off-by: Liu Ying <victor.liu@nxp.com>
> > ---
> > v1->v2:
> > * No change.
>
> How did you implement Rob's comment?

Should have discussed more in v1 about Rob's comment, but
let me explain why this dt-binding makes sense here:

Both i.MX8mp SoC and i.MX93 SoC media block control devices
contain a LVDS Display Bridge(LDB) child device. The i.MX93 block
control device additionally contains this PDFC child device.

LDB dt-binding [1] is written in a separate file and referenced in
i.MX8mp block control dt-binding [2].  So, for the sake of consistency,
it makes sense to keep this PDFC dt-binding and reference it
together with the LDB one [1] in i.MX93 block control dt-binding [3]
in future, doesn't it?

It seems good to have a separate PDFC dt-binding in case it can/will
be referenced by multiple parent device dt-bindings.

[1] Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml
[2] Documentation/devicetree/bindings/soc/imx/fsl,imx8mp-media-blk-ctrl.yaml
[3] Documentation/devicetree/bindings/soc/imx/fsl,imx93-media-blk-ctrl.yaml

Regards,
Liu Ying

>
> >
> >  .../display/bridge/nxp,imx93-pdfc.yaml        | 78 +++++++++++++++++++
> >  1 file changed, 78 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/bridge/nxp,imx93-pdfc.yaml
Krzysztof Kozlowski June 4, 2023, 10:16 a.m. UTC | #3 
On 02/06/2023 05:54, Ying Liu wrote:
> On Fri, Jun 2, 2023 at 1:45 AM Krzysztof Kozlowski
> <krzysztof.kozlowski@linaro.org> wrote:
>>
>> On 31/05/2023 11:32, Liu Ying wrote:
>>> NXP i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX register which
>>> configures parallel display format by using the "PARALLEL_DISP_FORMAT"
>>> field. Add device tree bindings for the display format configuration.
>>>
>>> Signed-off-by: Liu Ying <victor.liu@nxp.com>
>>> ---
>>> v1->v2:
>>> * No change.
>>
>> How did you implement Rob's comment?
> 
> Should have discussed more in v1 about Rob's comment, but
> let me explain why this dt-binding makes sense here:

"It needs to be defined as part of the mediamix blkctrl
schema though."

Where is it defined in mediamix blkctrl?



Best regards,
Krzysztof
Ying Liu June 5, 2023, 6:20 a.m. UTC | #4 
On Sun, Jun 4, 2023 at 6:16 PM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
> On 02/06/2023 05:54, Ying Liu wrote:
> > On Fri, Jun 2, 2023 at 1:45 AM Krzysztof Kozlowski
> > <krzysztof.kozlowski@linaro.org> wrote:
> >>
> >> On 31/05/2023 11:32, Liu Ying wrote:
> >>> NXP i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX register which
> >>> configures parallel display format by using the "PARALLEL_DISP_FORMAT"
> >>> field. Add device tree bindings for the display format configuration.
> >>>
> >>> Signed-off-by: Liu Ying <victor.liu@nxp.com>
> >>> ---
> >>> v1->v2:
> >>> * No change.
> >>
> >> How did you implement Rob's comment?
> >
> > Should have discussed more in v1 about Rob's comment, but
> > let me explain why this dt-binding makes sense here:
>
> "It needs to be defined as part of the mediamix blkctrl
> schema though."
>
> Where is it defined in mediamix blkctrl?

I've sent v3 patch set out to define it in mediamix blk-ctrl.

Regards,
Liu Ying
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/display/bridge/nxp,imx93-pdfc.yaml b/Documentation/devicetree/bindings/display/bridge/nxp,imx93-pdfc.yaml
new file mode 100644
index 000000000000..a84bfb46b01d
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/nxp,imx93-pdfc.yaml
@@ -0,0 +1,78 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/nxp,imx93-pdfc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX93 Parallel Display Format Configuration
+
+maintainers:
+  - Liu Ying <victor.liu@nxp.com>
+
+description: |
+  The i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX register which
+  configures parallel display format by using the "PARALLEL_DISP_FORMAT"
+  field.
+
+properties:
+  compatible:
+    const: nxp,imx93-pdfc
+
+  reg:
+    maxItems: 1
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Input port node to receive pixel data.
+
+      port@1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Output port node to downstream pixel data receivers.
+
+    required:
+      - port@0
+      - port@1
+
+required:
+  - compatible
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+
+    blk-ctrl {
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        bridge@60 {
+            compatible = "nxp,imx93-pdfc";
+            reg = <0x60 0x4>;
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    reg = <0>;
+
+                    pdfc_from_lcdif: endpoint {
+                        remote-endpoint = <&lcdif_to_pdfc>;
+                    };
+                };
+
+                port@1 {
+                    reg = <1>;
+
+                    pdfc_to_panel: endpoint {
+                        remote-endpoint = <&panel_from_pdfc>;
+                    };
+                };
+            };
+        };
+    };