Add "ti,oldi-mode" property to indicate the tidss driver the OLDI output mode. The 2 OLDI TXes on am625-dss allow a 3 different types of panel connections with the board. 1. Single Link / Single Mode on OLDI TX 0 OR 1. 2. Single Link / Duplicate Mode on OLDI TX 0 and 1. 3. Dual Link / Single Mode on OLDI TX 0 and 1. Add "ti,rgb565-to-888" property to override 16bit output from a videoport for a bridge that only accepts 24bit RGB888 DPI input. On some boards the HDMI bridge takes a 24bit DPI input, but only 16 data pins are actually enabled from the SoC. This new property forces the output to be RGB565 on a specific video port if the bridge requests a 24bit RGB color space. This assumes that the video port is connected like so: SoC : Bridge R0 -> R3 R1 -> R4 R2 -> R5 R3 -> R6 R4 -> R7 G0 -> G2 G1 -> G3 G2 -> G4 G3 -> G5 G4 -> G6 G5 -> G7 B0 -> B3 B1 -> B4 B2 -> B5 B3 -> B6 B4 -> B7 On the bridge side R0->R2, G0->G1, B0->B2 would be tied to ground. The bridge sees 24bits of data, but the lsb's are always zero. Signed-off-by: Aradhya Bhatia <a-bhatia1@xxxxxx> --- .../bindings/display/ti/ti,am65x-dss.yaml | 25 +++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml index 6bbce921479d..11d9b3821409 100644 --- a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml +++ b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml @@ -80,15 +80,35 @@ properties: properties: port@0: - $ref: /schemas/graph.yaml#/properties/port + $ref: /schemas/graph.yaml#/$defs/port-base + unevaluatedProperties: false description: The DSS OLDI output port node form video port 1 + properties: + ti,oldi-mode: + description: TI specific property to indicate the mode the OLDI TXes + and the display panel are connected in. + 0 -> OLDI TXes OFF (driver default for am625-dss) + 1 -> Single link, Single Mode (OLDI0) (driver default for am65x-dss) + 2 -> Single link, Single Mode (OLDI1) + 3 -> Single link, Duplicate Mode + 4 -> Dual link (Only Single Mode) + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2, 3, 4] + port@1: - $ref: /schemas/graph.yaml#/properties/port + $ref: /schemas/graph.yaml#/$defs/port-base + unevaluatedProperties: false description: The DSS DPI output port node from video port 2 + properties: + ti,rgb565-to-888: + description: + property to override DPI output to 16bit for 24bit bridge + type: boolean + ti,am65x-oldi-io-ctrl: $ref: "/schemas/types.yaml#/definitions/phandle" description: @@ -144,6 +164,7 @@ examples: #size-cells = <0>; port@0 { reg = <0>; + ti,oldi-mode = <1>; oldi_out0: endpoint { remote-endpoint = <&lcd_in0>; }; -- 2.37.0