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Message-Id: <DA6PUDJXVXL3.1EILFHW8G19E9@kernel.org>
Date: Tue, 27 May 2025 08:06:42 +0200
From: "Michael Walle" <mwalle@...nel.org>
To: "Aradhya Bhatia" <aradhya.bhatia@...ux.dev>, "Rob Herring"
<robh@...nel.org>, "Krzysztof Kozlowski" <krzk+dt@...nel.org>, "Conor
Dooley" <conor+dt@...nel.org>, "Tomi Valkeinen"
<tomi.valkeinen@...asonboard.com>, "Jyri Sarha" <jyri.sarha@....fi>
Cc: "Maarten Lankhorst" <maarten.lankhorst@...ux.intel.com>, "Thomas
Zimmermann" <tzimmermann@...e.de>, "Maxime Ripard" <mripard@...nel.org>,
"David Airlie" <airlied@...il.com>, "Laurent Pinchart"
<laurent.pinchart@...asonboard.com>, "Simona Vetter" <simona@...ll.ch>,
"Nishanth Menon" <nm@...com>, "Vignesh Raghavendra" <vigneshr@...com>,
"Devarsh Thakkar" <devarsht@...com>, "Praneeth Bajjuri" <praneeth@...com>,
"Udit Kumar" <u-kumar1@...com>, "Jayesh Choudhary" <j-choudhary@...com>,
"Francesco Dolcini" <francesco@...cini.it>, "Alexander Sverdlin"
<alexander.sverdlin@...mens.com>, "DRI Development List"
<dri-devel@...ts.freedesktop.org>, "Devicetree List"
<devicetree@...r.kernel.org>, "Linux Kernel List"
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 2/4] dt-bindings: display: ti: Add schema for AM625
OLDI Transmitter
Hi Aradhya,
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/ti/ti,am625-oldi.yaml
> @@ -0,0 +1,80 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/ti/ti,am625-oldi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments AM625 OLDI Transmitter
> +
> +maintainers:
> + - Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> + - Aradhya Bhatia <aradhya.bhatia@...ux.dev>
> +
> +description:
> + The AM625 TI Keystone OpenLDI transmitter (OLDI TX) supports serialized RGB
> + pixel data transmission between host and flat panel display over LVDS (Low
> + Voltage Differential Sampling) interface. The OLDI TX consists of 7-to-1 data
> + serializers, and 4-data and 1-clock LVDS outputs. It supports the LVDS output
> + formats "jeida-18", "jeida-24" and "vesa-18", and can accept 24-bit RGB or
> + padded and un-padded 18-bit RGB bus formats as input.
> +
> +properties:
> + reg:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> + description: serial clock input for the OLDI transmitters
> +
> + clock-names:
> + const: serial
> +
> + ti,companion-oldi:
> + $ref: /schemas/types.yaml#/definitions/phandle
> + description:
> + phandle to companion OLDI transmitter. This property is mandatory for the
> + primarty OLDI TX if the OLDI TXes are expected to work either in dual-lvds
primary
> + mode or in clone mode. This property should point to the secondary OLDI
> + TX.
You should mention that the second OLDI should also point back to
the primary OLDI using this property.
> + ti,secondary-oldi:
> + type: boolean
> + description:
> + Boolean property to mark the OLDI transmitter as the secondary one, when the
> + OLDI hardware is expected to run as a companion HW, in cases of dual-lvds
> + mode or clone mode. The primary OLDI hardware is responsible for all the
> + hardware configuration.
> +
> --- a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
> +++ b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
..
> @@ -190,3 +244,105 @@ examples:
> };
> };
> };
> +
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/soc/ti,sci_pm_domain.h>
> +
> + bus {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + dss1: dss@...00000 {
> + compatible = "ti,am625-dss";
> + reg = <0x00 0x30200000 0x00 0x1000>, /* common */
> + <0x00 0x30202000 0x00 0x1000>, /* vidl1 */
> + <0x00 0x30206000 0x00 0x1000>, /* vid */
> + <0x00 0x30207000 0x00 0x1000>, /* ovr1 */
> + <0x00 0x30208000 0x00 0x1000>, /* ovr2 */
> + <0x00 0x3020a000 0x00 0x1000>, /* vp1 */
> + <0x00 0x3020b000 0x00 0x1000>, /* vp2 */
> + <0x00 0x30201000 0x00 0x1000>; /* common1 */
> + reg-names = "common", "vidl1", "vid",
> + "ovr1", "ovr2", "vp1", "vp2", "common1";
> + power-domains = <&k3_pds 186 TI_SCI_PD_EXCLUSIVE>;
> + clocks = <&k3_clks 186 6>,
> + <&vp1_clock>,
> + <&k3_clks 186 2>;
> + clock-names = "fck", "vp1", "vp2";
> + interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
> + oldi-transmitters {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + oldi0: oldi@0 {
> + reg = <0>;
> + clocks = <&k3_clks 186 0>;
> + clock-names = "serial";
> + ti,companion-oldi = <&oldi1>;
> + ti,oldi-io-ctrl = <&dss_oldi_io_ctrl>;
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + port@0 {
> + reg = <0>;
> + oldi0_in: endpoint {
> + remote-endpoint = <&dpi0_out0>;
> + };
> + };
> + port@1 {
> + reg = <1>;
> + oldi0_out: endpoint {
> + remote-endpoint = <&panel_in0>;
> + };
> + };
> + };
> + };
> + oldi1: oldi@1 {
> + reg = <1>;
> + clocks = <&k3_clks 186 0>;
> + clock-names = "serial";
.. and update this example :)
-michael
> + ti,secondary-oldi;
> + ti,oldi-io-ctrl = <&dss_oldi_io_ctrl>;
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + port@0 {
> + reg = <0>;
> + oldi1_in: endpoint {
> + remote-endpoint = <&dpi0_out1>;
> + };
> + };
> + port@1 {
> + reg = <1>;
> + oldi1_out: endpoint {
> + remote-endpoint = <&panel_in1>;
> + };
> + };
> + };
> + };
> + };
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + port@0 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0>;
> + dpi0_out0: endpoint@0 {
> + reg = <0>;
> + remote-endpoint = <&oldi0_in>;
> + };
> + dpi0_out1: endpoint@1 {
> + reg = <1>;
> + remote-endpoint = <&oldi1_in>;
> + };
> + };
> + port@1 {
> + reg = <1>;
> + dpi1_out: endpoint {
> + remote-endpoint = <&hdmi_bridge>;
> + };
> + };
> + };
> + };
> + };
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