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X-OriginatorOrg: topic.nl X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Sep 2025 08:46:13.1472 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 371105ed-9371-4ec7-8659-08dde9fd2c15 X-MS-Exchange-CrossTenant-Id: 449607a5-3517-482d-8d16-41dd868cbda3 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=449607a5-3517-482d-8d16-41dd868cbda3;Ip=[20.93.157.195];Helo=[westeu11-emailsignatures-cloud.codetwo.com] X-MS-Exchange-CrossTenant-AuthSource: AMS0EPF0000019E.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU4PR04MB11055 On 9/2/25 08:53, Krzysztof Kozlowski wrote: > On Mon, Sep 01, 2025 at 04:29:01PM +0200, Mike Looijmans wrote: >> .../bindings/display/bridge/ti,tmds181.yaml | 152 ++++++++++++++++++ >> 1 file changed, 152 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/display/bridge/ti= ,tmds181.yaml >> >> diff --git a/Documentation/devicetree/bindings/display/bridge/ti,tmds181= .yaml b/Documentation/devicetree/bindings/display/bridge/ti,tmds181.yaml >> new file mode 100644 >> index 000000000000..c6387c482431 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/display/bridge/ti,tmds181.yaml >> @@ -0,0 +1,152 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/display/bridge/ti,tmds181.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: TMDS181 and SN65DP159 HDMI retimer/redriver chips >> + >> +maintainers: >> + - Mike Looijmans >> + >> +description: | >> + Texas Instruments TMDS181 and SN65DP159 retimer and redriver chips. >> + https://www.ti.com/product/TMDS181 >> + https://www.ti.com/product/SN65DP159 >> + >> +properties: >> + compatible: >> + oneOf: >> + - const: ti,tmds181 >> + - items: >> + - const: ti,sn65dp159 >> + - const: ti,tmds181 >> + >> + reg: >> + enum: >> + - 0x5b >> + - 0x5c >> + - 0x5d >> + - 0x5e >> + >> + oe-gpios: >> + maxItems: 1 >> + description: GPIO specifier for OE pin (active high). > So that's reset-gpios or powerdown-gpios (see gpio-consumer-common). At > least datasheet calls them that in one place. reset-gpios fits reasonably. Though the pin is labeled "OE". (Our experience: The pin must be driven low until the power supplies are=20 up. Failure to do so may put the chip in an error state, pulling the I2C=20 lines low, that only a power cycle may resolve. So it's close enough to=20 "reset") >> + >> + vdd-supply: >> + description: Core power supply, 1.1V >> + >> + vcc-supply: >> + description: IO power supply, 3.3V >> + >> + ports: >> + $ref: /schemas/graph.yaml#/properties/ports >> + >> + properties: >> + port@0: >> + $ref: /schemas/graph.yaml#/$defs/port-base >> + unevaluatedProperties: false >> + description: Video port for HDMI (ish) input >> + >> + properties: >> + endpoint: >> + $ref: /schemas/media/video-interfaces.yaml# >> + unevaluatedProperties: false >> + >> + port@1: >> + $ref: /schemas/graph.yaml#/$defs/port-base >> + unevaluatedProperties: false >> + description: Video port for HDMI output (panel or bridge) >> + >> + properties: >> + endpoint: >> + $ref: /schemas/media/video-interfaces.yaml# >> + unevaluatedProperties: false >> + >> + required: >> + - port@0 >> + - port@1 >> + >> + ti,source-mode: >> + type: boolean >> + description: >> + Force chip to operate in "source" mode. Allows to use >> + a TMDS181 chip (which defaults to sink) as cable driver. >> + >> + ti,sink-mode: > Aren't these two mutually exclusive? Can same device operate in source > and in sink mode simultaneously? They're exclusive, yes. Will add that. >> + type: boolean >> + description: >> + Force chip to operate in "sink" mode. Allows to use >> + a DP159 chip (defaults to source) for incoming signals. >> + >> + ti,retimer-threshold-hz: >> + minimum: 25000000 >> + maximum: 600000000 >> + default: 200000000 >> + description: >> + Cross-over point. Up until this pixel clock frequency >> + the chip remains in the low-power redriver mode. Above >> + the threshold the chip should operate in retimer mode. >> + >> + ti,dvi-mode: >> + type: boolean >> + description: Makes the DP159 chip operate in DVI mode. > This suggest it is not applicable to TMDS, so you need to restrict it to > disallow it there (see example-schema). > > Actually several other properties say they are applicable only to DP159. Will do. > >> + >> + ti,slew-rate: > Common property is "slew-rate" - see pincfg-node.yaml Will change to slew-rate. > >> + $ref: /schemas/types.yaml#/definitions/uint32 >> + minimum: 0 >> + maximum: 3 >> + default: 3 >> + description: Set slew rate, 0 is slowest, 3 is fastest. >> + >> + ti,disable-equalizer: >> + type: boolean >> + description: Disable the equalizer (to save power). >> + >> + ti,adaptive-equalizer: >> + type: boolean >> + description: Set the equalizer to adaptive mode. > Can equalizer be disabled and adaptive the same time? No, since "adaptive" is the default, I'll just remove that option. >> + >> +required: >> + - compatible >> + - reg >> + - ports >> + >> +additionalProperties: false > Best regards, > Krzysztof > --=20 Mike Looijmans