[PATCH 5/8] dt-bindings: display: bridge: Add ITE IT6263 LVDS to HDMI converter

Biju Das biju.das.jz at bp.renesas.com
Mon Sep 30 09:53:33 UTC 2024


Hi Liu,

> -----Original Message-----
> From: Liu Ying <victor.liu at nxp.com>
> Sent: Monday, September 30, 2024 10:49 AM
> Subject: Re: [PATCH 5/8] dt-bindings: display: bridge: Add ITE IT6263 LVDS to HDMI converter
> 
> On 09/30/2024, Biju Das wrote:
> > Hi Liu,
> 
> Hi Biju,
> 
> >
> >> -----Original Message-----
> >> From: Liu Ying <victor.liu at nxp.com>
> >> Sent: Monday, September 30, 2024 10:30 AM
> >> Subject: Re: [PATCH 5/8] dt-bindings: display: bridge: Add ITE IT6263
> >> LVDS to HDMI converter
> >>
> >> On 09/30/2024, Biju Das wrote:
> >>> Hi Liu,
> >>
> >> Hi Biju,
> >>
> >>>
> >>>> -----Original Message-----
> >>>> From: Liu Ying <victor.liu at nxp.com>
> >>>> Sent: Monday, September 30, 2024 10:16 AM
> >>>> Subject: Re: [PATCH 5/8] dt-bindings: display: bridge: Add ITE
> >>>> IT6263 LVDS to HDMI converter
> >>>>
> >>>> On 09/30/2024, Biju Das wrote:
> >>>>> Hi Liu,
> >>>>
> >>>> Hi Biju,
> >>>>
> >>>>>
> >>>>> thanks for the patch.
> >>>>>
> >>>>>> -----Original Message-----
> >>>>>> From: linux-arm-kernel
> >>>>>> <linux-arm-kernel-bounces at lists.infradead.org>
> >>>>>> On Behalf Of Liu Ying
> >>>>>> Sent: Monday, September 30, 2024 6:29 AM
> >>>>>> Subject: [PATCH 5/8] dt-bindings: display: bridge: Add ITE IT6263
> >>>>>> LVDS to HDMI converter
> >>>>>>
> >>>>>> Document ITE IT6263 LVDS to HDMI converter.
> >>>>>>
> >>>>>> Product link:
> >>>>>> https://www.ite.com.tw/en/product/cate1/IT6263
> >>>>>>
> >>>>>> Signed-off-by: Liu Ying <victor.liu at nxp.com>
> >>>>>> ---
> >>>>>>  .../bindings/display/bridge/ite,it6263.yaml   | 310 ++++++++++++++++++
> >>>>>>  1 file changed, 310 insertions(+)  create mode 100644
> >>>>>> Documentation/devicetree/bindings/display/bridge/ite,it6263.yaml
> >>>>>>
> >>>>>> diff --git
> >>>>>> a/Documentation/devicetree/bindings/display/bridge/ite,it6263.yam
> >>>>>> l
> >>>>>> b/Documentation/devicetree/bindings/display/bridge/ite,it6263.yam
> >>>>>> l
> >>>>>> new file mode 100644
> >>>>>> index 000000000000..97fb81e5bc4a
> >>>>>> --- /dev/null
> >>>>>> +++ b/Documentation/devicetree/bindings/display/bridge/ite,it6263
> >>>>>> +++ .y
> >>>>>> +++ am
> >>>>>> +++ l
> >>>>>> @@ -0,0 +1,310 @@
> >>>>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML
> >>>>>> +1.2
> >>>>>> +---
> >>>>>> +$id:
> >>>>>> +http://devicetree.org/schemas/display/bridge/ite,it6263.yaml#
> >>>>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> >>>>>> +
> >>>>>> +title: ITE IT6263 LVDS to HDMI converter
> >>>>>> +
> >>>>>> +maintainers:
> >>>>>> +  - Liu Ying <victor.liu at nxp.com>
> >>>>>> +
> >>>>>> +description: |
> >>>>>> +  The IT6263 is a high-performance single-chip De-SSC(De-Spread
> >>>>>> +Spectrum) LVDS
> >>>>>> +  to HDMI converter.  Combined with LVDS receiver and HDMI 1.4a
> >>>>>> +transmitter,
> >>>>>> +  the IT6263 supports LVDS input and HDMI 1.4 output by conversion function.
> >>>>>> +  The built-in LVDS receiver can support single-link and
> >>>>>> +dual-link LVDS inputs,
> >>>>>> +  and the built-in HDMI transmitter is fully compliant with HDMI
> >>>>>> +1.4a/3D, HDCP
> >>>>>> +  1.2 and backward compatible with DVI 1.0 specification.
> >>>>>> +
> >>>>>> +  The IT6263 also encodes and transmits up to 8 channels of I2S
> >>>>>> + digital audio,  with sampling rate up to 192KHz and sample size up to 24 bits.
> >>>>>> + In addition,  an S/PDIF input port takes in compressed audio of up to 192KHz frame rate.
> >>>>>> +
> >>>>>> +  The newly supported High-Bit Rate(HBR) audio by HDMI
> >>>>>> + specifications
> >>>>>> + v1.3 is  provided by the IT6263 in two interfaces: the four I2S
> >>>>>> + input ports or the  S/PDIF input port.  With both interfaces
> >>>>>> + the highest possible HBR frame rate  is supported at up to 768KHz.
> >>>>>> +
> >>>>>> +properties:
> >>>>>> +  compatible:
> >>>>>> +    const: ite,it6263
> >>>>>> +
> >>>>>> +  reg:
> >>>>>> +    maxItems: 1
> >>>>>> +
> >>>>>> +  clocks:
> >>>>>> +    maxItems: 1
> >>>>>> +    description: audio master clock
> >>>>>> +
> >>>>>> +  clock-names:
> >>>>>> +    const: mclk
> >>>>>> +
> >>>>>> +  reset-gpios:
> >>>>>> +    maxItems: 1
> >>>>>> +
> >>>>>> +  ivdd-supply:
> >>>>>> +    description: 1.8V digital logic power
> >>>>>> +
> >>>>>> +  ovdd-supply:
> >>>>>> +    description: 3.3V I/O pin power
> >>>>>> +
> >>>>>> +  txavcc18-supply:
> >>>>>> +    description: 1.8V HDMI analog frontend power
> >>>>>> +
> >>>>>> +  txavcc33-supply:
> >>>>>> +    description: 3.3V HDMI analog frontend power
> >>>>>> +
> >>>>>> +  pvcc1-supply:
> >>>>>> +    description: 1.8V HDMI frontend core PLL power
> >>>>>> +
> >>>>>> +  pvcc2-supply:
> >>>>>> +    description: 1.8V HDMI frontend filter PLL power
> >>>>>> +
> >>>>>> +  avcc-supply:
> >>>>>> +    description: 3.3V LVDS frontend power
> >>>>>> +
> >>>>>> +  anvdd-supply:
> >>>>>> +    description: 1.8V LVDS frontend analog power
> >>>>>> +
> >>>>>> +  apvdd-supply:
> >>>>>> +    description: 1.8V LVDS frontend PLL power
> >>>>>> +
> >>>>>> +  "#sound-dai-cells":
> >>>>>> +    const: 0
> >>>>>> +
> >>>>>> +  ite,i2s-audio-fifo-sources:
> >>>>>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> >>>>>> +    minItems: 1
> >>>>>> +    maxItems: 4
> >>>>>> +    items:
> >>>>>> +      enum: [0, 1, 2, 3]
> >>>>>> +    description:
> >>>>>> +      Each array element indicates the pin number of an I2S serial data input
> >>>>>> +      line which is connected to an audio FIFO, from audio FIFO0 to FIFO3.
> >>>>>> +
> >>>>>> +  ite,rl-channel-swap-audio-sources:
> >>>>>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> >>>>>> +    minItems: 1
> >>>>>> +    maxItems: 4
> >>>>>> +    uniqueItems: true
> >>>>>> +    items:
> >>>>>> +      enum: [0, 1, 2, 3]
> >>>>>> +    description:
> >>>>>> +      Each array element indicates an audio source whose right channel and left
> >>>>>> +      channel are swapped by this converter. For I2S, the element is the pin
> >>>>>> +      number of an I2S serial data input line. For S/PDIF, the element is always
> >>>>>> +      0.
> >>>>>> +
> >>>>>> +  ports:
> >>>>>> +    $ref: /schemas/graph.yaml#/properties/ports
> >>>>>> +
> >>>>>> +    oneOf:
> >>>>>> +      - properties:
> >>>>>> +          port at 0:
> >>>>>> +            $ref: /schemas/graph.yaml#/properties/port
> >>>>>> +            description: the first LVDS input link
> >>>>>> +
> >>>>>> +          port at 1: false
> >>>>>> +
> >>>>>> +          port at 2:
> >>>>>> +            $ref: /schemas/graph.yaml#/properties/port
> >>>>>> +            description: video port for the HDMI output
> >>>>>> +
> >>>>>> +          port at 3:
> >>>>>> +            $ref: /schemas/graph.yaml#/properties/port
> >>>>>> +            description: sound input port
> >>>>>> +
> >>>>>> +        required:
> >>>>>> +          - port at 0
> >>>>>> +          - port at 2
> >>>>>> +
> >>>>>> +      - properties:
> >>>>>> +          port at 0:
> >>>>>> +            $ref: /schemas/graph.yaml#/$defs/port-base
> >>>>>> +            unevaluatedProperties: false
> >>>>>> +            description: the first LVDS input link
> >>>>>> +
> >>>>>> +            properties:
> >>>>>> +              dual-lvds-odd-pixels:
> >>>>>> +                type: boolean
> >>>>>> +                description: the first sink port for odd pixels
> >>>>>> +
> >>>>>> +              dual-lvds-even-pixels:
> >>>>>> +                type: boolean
> >>>>>> +                description: the first sink port for even pixels
> >>>>>> +
> >>>>>> +            oneOf:
> >>>>>> +              - required: [dual-lvds-odd-pixels]
> >>>>>> +              - required: [dual-lvds-even-pixels]
> >>>>>> +
> >>>>>> +          port at 1:
> >>>>>> +            $ref: /schemas/graph.yaml#/$defs/port-base
> >>>>>> +            unevaluatedProperties: false
> >>>>>> +            description: the second LVDS input link
> >>>>>> +
> >>>>>> +            properties:
> >>>>>> +              dual-lvds-even-pixels:
> >>>>>> +                type: boolean
> >>>>>> +                description: the second sink port for even
> >>>>>> + pixels
> >>>>>> +
> >>>>>> +              dual-lvds-odd-pixels:
> >>>>>> +                type: boolean
> >>>>>> +                description: the second sink port for odd pixels
> >>>>>> +
> >>>>>> +            oneOf:
> >>>>>> +              - required: [dual-lvds-even-pixels]
> >>>>>> +              - required: [dual-lvds-odd-pixels]
> >>>>>
> >>>>>
> >>>>>> +
> >>>>>> +          port at 2:
> >>>>>> +            $ref: /schemas/graph.yaml#/properties/port
> >>>>>> +            description: video port for the HDMI output
> >>>>>> +
> >>>>>> +          port at 3:
> >>>>>> +            $ref: /schemas/graph.yaml#/properties/port
> >>>>>> +            description: sound input port
> >>>>>
> >>>>> What about single lvds as device support it?
> >>>>
> >>>> The single LVDS link has already been documented in this binding doc.
> >>>> Please find the "properties" above where only "port at 0" and "port at 2"
> >>>> are required.
> >>>
> >>> Maybe "the first LVDS input link"-->"Single LVDS input link" for single LVDS block??
> >>
> >> Nope.
> >>
> >> I tested single LVDS link with the second LVDS link.  It didn't work.
> >> The single LVDS link only works with the first LVDS link.
> >
> > OK. That is the reason you made port at 1 false.
> 
> Yes.
> 
> >
> > Still port at 0 is a single LVDS instance or first LVDS input link for
> > the dual LVDS configuration??
> 
> "port at 0" always represents the first LVDS link and "port at 1" always represents the second LVDS link, no
> matter it's a single-link LVDS or a dual-link LVDS.
> 
> Which one is the first/second LVDS link?  See "LVDS front-end interface pin" in IT6263 data sheet[1]
> where first/second are defined.
> 
> [1] http://static6.arrow.com/aropdfconversion/a2ecd2a29274cf0bfb3f3c829ef224c5838fe144/it6263fn.pdf

I agree it matches with hw documentation.

Cheers,
Biju

> 
> >
> > Cheers,
> > Biju
> >
> >
> >>
> >>>
> >>>>
> >>>> imx8mp-evk-lvds0-imx-lvds-hdmi.dtso and
> >>>> imx8mp-evk-lvds1-imx-lvds-hdmi.dtso
> >>>> added in patch 7 support the NXP adapter card with single LVDS link.
> >>>>
> >>>>>
> >>>>> Cheers,
> >>>>> Biju
> >>>>>
> >>>>>> +
> >>>>>> +        required:
> >>>>>> +          - port at 0
> >>>>>> +          - port at 1
> >>>>>> +          - port at 2
> >>>>>> +
> >>>>>> +        allOf:
> >>>>>> +          - if:
> >>>>>> +              properties:
> >>>>>> +                port at 0:
> >>>>>> +                  required:
> >>>>>> +                    - dual-lvds-odd-pixels
> >>>>>> +            then:
> >>>>>> +              properties:
> >>>>>> +                port at 1:
> >>>>>> +                  properties:
> >>>>>> +                    dual-lvds-odd-pixels: false
> >>>>>> +
> >>>>>> +          - if:
> >>>>>> +              properties:
> >>>>>> +                port at 0:
> >>>>>> +                  required:
> >>>>>> +                    - dual-lvds-even-pixels
> >>>>>> +            then:
> >>>>>> +              properties:
> >>>>>> +                port at 1:
> >>>>>> +                  properties:
> >>>>>> +                    dual-lvds-even-pixels: false
> >>>>>> +
> >>>>>> +required:
> >>>>>> +  - compatible
> >>>>>> +  - reg
> >>>>>> +  - ivdd-supply
> >>>>>> +  - ovdd-supply
> >>>>>> +  - txavcc18-supply
> >>>>>> +  - txavcc33-supply
> >>>>>> +  - pvcc1-supply
> >>>>>> +  - pvcc2-supply
> >>>>>> +  - avcc-supply
> >>>>>> +  - anvdd-supply
> >>>>>> +  - apvdd-supply
> >>>>>> +  - ports
> >>>>>> +
> >>>>>> +additionalProperties: false
> >>>>>> +
> >>>>>> +examples:
> >>>>>> +  - |
> >>>>>> +    /* single-link LVDS input */
> >>>>>> +    #include <dt-bindings/gpio/gpio.h>
> >>>>>> +
> >>>>>> +    i2c {
> >>>>>> +        #address-cells = <1>;
> >>>>>> +        #size-cells = <0>;
> >>>>>> +
> >>>>>> +        hdmi at 4c {
> >>>>>> +            compatible = "ite,it6263";
> >>>>>> +            reg = <0x4c>;
> >>>>>> +            reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
> >>>>>> +            ivdd-supply = <&reg_buck5>;
> >>>>>> +            ovdd-supply = <&reg_vext_3v3>;
> >>>>>> +            txavcc18-supply = <&reg_buck5>;
> >>>>>> +            txavcc33-supply = <&reg_vext_3v3>;
> >>>>>> +            pvcc1-supply = <&reg_buck5>;
> >>>>>> +            pvcc2-supply = <&reg_buck5>;
> >>>>>> +            avcc-supply = <&reg_vext_3v3>;
> >>>>>> +            anvdd-supply = <&reg_buck5>;
> >>>>>> +            apvdd-supply = <&reg_buck5>;
> >>>>>> +
> >>>>>> +            ports {
> >>>>>> +                #address-cells = <1>;
> >>>>>> +                #size-cells = <0>;
> >>>>>> +
> >>>>>> +                port at 0 {
> >>>>>> +                    reg = <0>;
> >>>>>> +
> >>>>>> +                    it6263_lvds_link1: endpoint {
> >>>>>> +                        remote-endpoint = <&ldb_lvds_ch0>;
> >>>>>> +                    };
> >>>>>> +                };
> >>>>>> +
> >>>>>> +                port at 2 {
> >>>>>> +                    reg = <2>;
> >>>>>> +
> >>>>>> +                    it6263_out: endpoint {
> >>>>>> +                        remote-endpoint = <&hdmi_in>;
> >>>>>> +                    };
> >>>>>> +                };
> >>>>>> +            };
> >>>>>> +        };
> >>>>>> +    };
> >>>>>> +
> >>>>>> +  - |
> >>>>>> +    /* dual-link LVDS input */
> >>>>>> +    #include <dt-bindings/gpio/gpio.h>
> >>>>>> +
> >>>>>> +    i2c {
> >>>>>> +        #address-cells = <1>;
> >>>>>> +        #size-cells = <0>;
> >>>>>> +
> >>>>>> +        hdmi at 4c {
> >>>>>> +            compatible = "ite,it6263";
> >>>>>> +            reg = <0x4c>;
> >>>>>> +            reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
> >>>>>> +            ivdd-supply = <&reg_buck5>;
> >>>>>> +            ovdd-supply = <&reg_vext_3v3>;
> >>>>>> +            txavcc18-supply = <&reg_buck5>;
> >>>>>> +            txavcc33-supply = <&reg_vext_3v3>;
> >>>>>> +            pvcc1-supply = <&reg_buck5>;
> >>>>>> +            pvcc2-supply = <&reg_buck5>;
> >>>>>> +            avcc-supply = <&reg_vext_3v3>;
> >>>>>> +            anvdd-supply = <&reg_buck5>;
> >>>>>> +            apvdd-supply = <&reg_buck5>;
> >>>>>> +
> >>>>>> +            ports {
> >>>>>> +                #address-cells = <1>;
> >>>>>> +                #size-cells = <0>;
> >>>>>> +
> >>>>>> +                port at 0 {
> >>>>>> +                    reg = <0>;
> >>>>>> +                    dual-lvds-odd-pixels;
> >>>>>> +
> >>>>>> +                    it6263_lvds_link1_dual: endpoint {
> >>>>>> +                        remote-endpoint = <&ldb_lvds_ch0>;
> >>>>>> +                    };
> >>>>>> +                };
> >>>>>> +
> >>>>>> +                port at 1 {
> >>>>>> +                    reg = <1>;
> >>>>>> +                    dual-lvds-even-pixels;
> >>>>>> +
> >>>>>> +                    it6263_lvds_link2_dual: endpoint {
> >>>>>> +                        remote-endpoint = <&ldb_lvds_ch1>;
> >>>>>> +                    };
> >>>>>> +                };
> >>>>>> +
> >>>>>> +                port at 2 {
> >>>>>> +                    reg = <2>;
> >>>>>> +
> >>>>>> +                    it6263_out_dual: endpoint {
> >>>>>> +                        remote-endpoint = <&hdmi_in>;
> >>>>>> +                    };
> >>>>>> +                };
> >>>>>> +            };
> >>>>>> +        };
> >>>>>> +    };
> >>>>>> --
> >>>>>> 2.34.1
> >>>>>>
> >>>>>
> >>>>
> >>>> --
> >>>> Regards,
> >>>> Liu Ying
> >>>
> >>
> >> --
> >> Regards,
> >> Liu Ying
> >
> 
> --
> Regards,
> Liu Ying



More information about the dri-devel mailing list