On Thu, Jun 16, 2022 at 09:22:16PM +0800, Rex-BC Chen wrote:
On Tue, 2022-06-14 at 14:23 -0600, Rob Herring wrote:
On Fri, Jun 10, 2022 at 06:55:13PM +0800, Bo-Chen Chen wrote:
From: Markus Schneider-Pargmann msp@baylibre.com
This controller is present on several mediatek hardware. Currently mt8195 and mt8395 have this controller without a functional difference, so only one compatible field is added.
The controller can have two forms, as a normal display port and as an embedded display port.
Signed-off-by: Markus Schneider-Pargmann msp@baylibre.com Signed-off-by: Guillaume Ranquet granquet@baylibre.com [Bo-Chen: Fix reviewers' comment] Signed-off-by: Bo-Chen Chen rex-bc.chen@mediatek.com
.../display/mediatek/mediatek,dp.yaml | 101 ++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.ya ml b/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.ya ml new file mode 100644 index 000000000000..10f50a0dcf49 --- /dev/null +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.ya ml @@ -0,0 +1,101 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: https://urldefense.com/v3/__http://devicetree.org/schemas/display/mediatek/m...
+$schema: https://urldefense.com/v3/__http://devicetree.org/meta-schemas/core.yaml*__;...
+title: MediaTek Display Port Controller
+maintainers:
- Chun-Kuang Hu chunkuang.hu@kernel.org
- Jitao shi jitao.shi@mediatek.com
+description: |
- Device tree bindings for the MediaTek display port and
- embedded display port controller present on some MediaTek SoCs.
+properties:
- compatible:
- enum:
- mediatek,mt8195-dp-tx- mediatek,mt8195-edp-tx- reg:
- maxItems: 1
- nvmem-cells:
- maxItems: 1
- description: efuse data for display port calibration
- nvmem-cell-names:
- const: dp_calibration_data
- power-domains:
- maxItems: 1
- interrupts:
- maxItems: 1
- ports:
- $ref: /schemas/graph.yaml#/properties/ports
- properties:
port@0:$ref: /schemas/graph.yaml#/properties/portdescription: Input endpoint of the controller, usuallydp_intf
port@1:$ref: /schemas/graph.yaml#/properties/portdescription: Output endpoint of the controller- required:
- port@0- port@1- max-lanes:
- maxItems: 1
- description: maximum number of lanes supported by the
hardware.
We already have a 'data-lanes' property defined in 'video-interfaces.yaml' that can serve this purpose.
Hello Rob,
Thanks for review. From the description of video-interfaces.yaml, I think it's not quite match what we need. We only need this value be one of "1,2,4".
data-lanes = <0>; data-lanes = <0 1>; data-lanes = <0 1 2 3>;
Limiting the number of lanes to something less than the max is exactly how this property is used in addition to being able to show the mapping of lanes.
Rob