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Linux/AM3358: DTS settings for SII9022 HDMI transmitter

zizhen hu
Intellectual 320 points
Part Number: AM3358

Tool/software: Linux

hi:

    we want to use the sii9022 to convert the lcd to hdmi.can you give us a dts and a document to guide hdmi?

  • 0
    TI__Guru**** 393215 points
    The software team have been notified. They will respond here.
  • 0 in reply to Biser Gatchev-XID
    Guru 13640 points

    Hi,

    Which version of software ?

    If you are using processor SDK and latest one can you refer: arch/arm/boot/dts/am437x-gp-evm-hdmi.dts (Similar thing you can do AM335x)

    Also refer :
    1. Documentation/i2c/instantiating-devices
    2. www.kernel.org/.../sii902x.txt

  • 0 in reply to Dwarakesh Radhakrishnan
    Intellectual 320 points

    yes,I use the SDK PROCESSOR 3.02.

    I add hdim same like am437x-gp-evm-hdmi.dts.but some node i do not how to modifty.

    in am437x-gp-evm-hdmi,the dts is followed.

    1.when use the hdmi ,the sound 0 is must disabled.

    2.am335x dts have no dpi_out,is this in am335x dts file named lcdc?

    #include "am437x-gp-evm.dts"
    #include <dt-bindings/sound/sii9022-audio.h>

    / {
    aliases {
    display0 = &hdmi;
    };

    hdmi: connector {
    compatible = "hdmi-connector";
    label = "hdmi";

    type = "b";

    port {
    hdmi_connector_in: endpoint {
    remote-endpoint = <&sii9022_out>;
    };
    };
    };

    sound@1 {
    compatible = "simple-audio-card";
    simple-audio-card,name = "HDMI";
    simple-audio-card,format = "i2s";
    simple-audio-card,bitclock-master = <&hdmi_dailink_master>;
    simple-audio-card,frame-master = <&hdmi_dailink_master>;
    hdmi_dailink_master: simple-audio-card,cpu {
    sound-dai = <&mcasp1>;
    system-clock-frequency = <24000000>;

    system-clock-direction = "out";
    };

    simple-audio-card,codec {
    sound-dai = <&sii9022>;
    system-clock-frequency = <12000000>;
    };
    };
    };

    &lcd_bl {
    status = "disabled";
    };

    &sound0 {
    status = "disabled";
    };

    &i2c1 {
    sii9022: sii9022@3b {
    #sound-dai-cells = <0>;
    compatible = "sil,sii9022";
    reg = <0x3b>;

    interrupt-parent = <&gpio3>;
    interrupts = <24 IRQ_TYPE_LEVEL_LOW>;

    i2s-fifo-routing = <
    (ENABLE_BIT|CONNECT_SD0)
    0
    0
    0
    >;

    ports {
    #address-cells = <1>;
    #size-cells = <0>;

    port@0 {

    reg = <0>;

    sii9022_in: endpoint {
    remote-endpoint = <&dpi_out>;
    };
    };

    port@1 {
    reg = <1>;

    sii9022_out: endpoint {
    remote-endpoint = <&hdmi_connector_in>;
    };
    };
    };
    };
    };

    &dss {
    port {
    dpi_out: endpoint@0 {
    remote-endpoint = <&sii9022_in>;
    data-lines = <24>;
    };
    };
    };

    /* Override SelLCDorHDMI from am437x-gp-evm.dts to select HDMI */
    &gpio5 {
    p8 {
    output-low;
    };
    };

  • 0 in reply to zizhen hu
    Guru 13640 points
    Hi,

    1.when use the hdmi ,the sound 0 is must disabled.
    ans: HDMI can be provided audio using MCASP ? Have you connected it ? IF so you need to find out which instance of MCASP connected. IF MCASP1 is being used, then it is fine. If MCASP0 is being used, then you need to enable sound0.

    2.am335x dts have no dpi_out,is this in am335x dts file named lcdc?
    ans: That seems to be fine to use lcdc since you want to give LCD output to HDMI.
  • 0 in reply to Dwarakesh Radhakrishnan
    Intellectual 320 points

    sorry,reply so late.

    i test the dts file like attach file,it failed.it show the error like this.

    sii9022 2-003b: [huzz]failed to find video source,nodename=sii9022

    can you help me to check this dts?

    i find that am437x hdmi use the dss,but am335x does not support dss,how can i do?

    am335x-evm.7z

  • 0 in reply to zizhen hu
    Intellectual 320 points

    can anynoe help me fixed this?

  • 0 in reply to zizhen hu
    TI__Guru**** 161600 points
    Hi,

    Revisit your &lcdc node. You can take a reference from am335x-boneblack.dts, regarding the &lcdc device tree settings.

    Best Regards,
    Yordan
  • 0 in reply to Yordan Kovachev
    Intellectual 320 points
    hi yordan:
    thanks for your reply.
    it not only the dts file to change.the sii9022 driver in SDK-PROCESSOR it use the omapdss,the git log show me "OMAPDSS: Add SiI9022 driver",what OMAPDSS means?it can work on am335x?
    in encode_sii9022_video.c file ,the code has many omapdss operates.
  • 0 in reply to zizhen hu
    TI__Guru**** 161600 points
    Hi,

    No for am335x you need to use the lcdc, this device does not have a display subsystem. It uses lcd controller.

    Best Regards,
    Yrodan