using DP0 as HDMI on TX2

Autonomous Machines Jetson & Embedded Systems Jetson TX2
#1

Hi,

On our custom carrier board, DP0 port is set as HDMI and I try to use this as HDMI. I used tegra186-quill-p3310-1000-c03-00-dsi-hdmi-hdmi.dts and tegra186-quill-p3310-1000-c03-00-dsi-hdmi-dp.dts but there is not a progress. Linux cannot get EDID data from monitor.

dmesg output:

[    8.677728] tegradc 15210000.nvdisplay: unblank
[    8.677740] PD DISP0 index2 UP
[    8.679407] PD DISP1 index3 UP
[    8.679696] PD DISP2 index4 UP
[    8.685530] Parent Clock set for DC plld2
[    8.691062] edid invalid
[    8.692961] edid invalid
[    8.693065] edid invalid
[    8.693149] tegradc 15210000.nvdisplay: hdmi: pclk:25200K, set prod-setting:prod_c_54M
[    8.697190] scsi 2:0:0:0: Direct-Access     SanDisk  Ultra Fit        1.00 PQ: 0 ANSI: 6
[    8.697898] sd 2:0:0:0: [sda] 60062500 512-byte logical blocks: (30.8 GB/28.6 GiB)
[    8.699301] sd 2:0:0:0: [sda] Write Protect is off
[    8.699305] sd 2:0:0:0: [sda] Mode Sense: 43 00 00 00
[    8.700084] sd 2:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[    8.707782]  sda: sda1
[    8.710147] sd 2:0:0:0: [sda] Attached SCSI removable disk
[    8.884310] tegra-i2c 3190000.i2c: rx dma timeout txlen:28 rxlen:128
[    8.884317] tegra-i2c 3190000.i2c: --- register dump for debugging ----
[    8.884327] tegra-i2c 3190000.i2c: I2C_CNFG - 0x22c00
[    8.884333] tegra-i2c 3190000.i2c: I2C_PACKET_TRANSFER_STATUS - 0x10001
[    8.884339] tegra-i2c 3190000.i2c: I2C_FIFO_CONTROL - 0x1c
[    8.884345] tegra-i2c 3190000.i2c: I2C_FIFO_STATUS - 0x800040
[    8.884398] tegra-i2c 3190000.i2c: I2C_INT_MASK - 0x6c
[    8.884408] tegra-i2c 3190000.i2c: I2C_INT_STATUS - 0x2
[    8.884455] tegra-i2c 3190000.i2c: i2c transfer timed out addr: 0x50

You can also find full dmesg output attached.

I also changed tegra186-quill-p3310-1000-c03-00-dsi-hdmi-hdmi.dts with below parameters but had no effect.

//Enable Display Port
  host1x {

    //(HEADs)
    nvdisplay@15200000 {
      //Display Controller 0
      status = "disabled";
      //Specify where to send the output of this display controller
      nvidia,dc-or-node = "/host1x/dsi";
    };
    nvdisplay@15210000 {
      //Display Controller 1
      status = "okay";
      //Specify where to send the output of this display controller
      nvidia,dc-or-node = "/host1x/sor1";
    };
    nvdisplay@15220000 {
      //Display Controller 2
      status = "okay";
      //Specify where to send the output of this display controller
      nvidia,dc-or-node = "/host1x/sor";
    };



    //Output Resources
    sor {
      //Serial Output Resource 0
      status = "okay";
      dp-display {
        status = "disabled";
      };
      hdmi-display {
        status = "okay";
      };
      panel-s-edp-uhdtv-15-6 {
        smartdimmer {
          status = "disabled";
        };
      };
    };
    dpaux@155c0000 {
      //Display Port Aux For Channel 0 (Coupled with SOR0)
      status = "disabled";
    };

    sor1 {
      //Serial Output Resource 1
      status = "okay";
      dp-display {
        status = "disabled";
	//bootloader-status = "disabled";
      };
      hdmi-display {
        status = "okay";
      };
    };
    dsi@153000000 {
      status = "disabled";
    };


    //Display Port Aux For Channel 1 (Coupled with SOR1)
    dpaux@15040000 {
      status = "okay";
      //bootloader-status = "okay";
    };

  };

dmesg.txt (126 KB)

#2

ckaya,

Does your carrier follow the OEM DG? I only see one HDMI in your log. How about the other HDMI port? Is it working?

#3

On our carrier board we have only one HDMI port (DP0). I cannot test other HDMI port. How can I enable HDMI_DP0 or both HDMI ports?

#4

Oh. Sorry that I misunderstood your request. Are you using DP0 as alternative HDMI port and your usecase is still single HDMI case?

#5

Yes, you are right. We want to use DP0 as HDMI port and it is the only one HDMI port on our carrier.

#6

Please check the I2C used on this, seems it failed to reach monitor.

#7

We cecked I2C line (B34, B35) of DP0 and there was not any signal on that line. How can I set the correct I2C line for this channel?

#8

From SW aspect, I am not sure why your statement does not match your device tree. You enable 2 HDMI in your DT but you said only need one HDMI.

Could you check dpaux is set correctly or not?

#9

Dear WayneWWW,

Could you please tell me how to check dpaux? Where should I look at?

#10

I just wonder what is your final DTB flashed to the device. The DTB you posted enabled two HDMI but you said you only need one.

#11

ckaya, Did you succeed in that?
I’m on the same situation here.

Thanks

#12

marked