USB-C DisplayPort/HDMI

crashoverride · Posted at 6/27/2017 02:00:17

Is video output over USB-C port enabled in the Ubuntu image? Has anybody got it working? If so, what is required?

isle · Posted at 6/27/2017 10:38:10

Yes ,It can

crashoverride · Posted at 6/27/2017 22:48:57

Using the latest kernel, I get the following errors:

[ 2387.961730] fusb302 4-0022: CC connected in 0 as DFP
[ 2388.451948] fusb302 4-0022: PD connected as DFP, supporting 5V
[ 2388.554799] fusb302 4-0022: DP config successful, pin_assignment 0x8
[ 2388.563026] cdn-dp fec00000.dp: [drm:cdn_dp_pd_event_work] Connected, not enabled. Enabling cdn
[ 2388.595903] xhci-hcd xhci-hcd.6.auto: xHCI Host Controller
[ 2388.597416] xhci-hcd xhci-hcd.6.auto: new USB bus registered, assigned bus number 6
[ 2388.597647] xhci-hcd xhci-hcd.6.auto: hcc params 0x0220fe64 hci version 0x110 quirks 0x00030010
[ 2388.597697] xhci-hcd xhci-hcd.6.auto: irq 227, io mem 0xfe800000
[ 2388.597861] usb usb6: New USB device found, idVendor=1d6b, idProduct=0002
[ 2388.597869] usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2388.597877] usb usb6: Product: xHCI Host Controller
[ 2388.597884] usb usb6: Manufacturer: Linux 4.4.55 xhci-hcd
[ 2388.597890] usb usb6: SerialNumber: xhci-hcd.6.auto
[ 2388.598740] hub 6-0:1.0: USB hub found
[ 2388.598787] hub 6-0:1.0: 1 port detected
[ 2388.599176] xhci-hcd xhci-hcd.6.auto: xHCI Host Controller
[ 2388.599511] xhci-hcd xhci-hcd.6.auto: new USB bus registered, assigned bus number 8
[ 2388.599673] usb usb8: We don't know the algorithms for LPM for this host, disabling LPM.
[ 2388.599794] usb usb8: New USB device found, idVendor=1d6b, idProduct=0003
[ 2388.599802] usb usb8: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2388.599809] usb usb8: Product: xHCI Host Controller
[ 2388.599816] usb usb8: Manufacturer: Linux 4.4.55 xhci-hcd
[ 2388.599822] usb usb8: SerialNumber: xhci-hcd.6.auto
[ 2388.600850] hub 8-0:1.0: USB hub found
[ 2388.600895] hub 8-0:1.0: 1 port detected
[ 2388.601348] rockchip-dwc3 usb@fe800000: USB HOST connected
[ 2389.065153] fusb302 4-0022: attention, dp_status 9a
[ 2389.563318] fusb302 4-0022: attention, dp_status 9a
[ 2390.061664] fusb302 4-0022: attention, dp_status 9a
[ 2393.744001] cdn-dp fec00000.dp: [drm:cdn_dp_get_sink_capability] *ERROR* Get sink capability timed out
[ 2393.744911] cdn-dp fec00000.dp: [drm:cdn_dp_pd_event_work] *ERROR* Enable dp failed -110
[ 2393.745674] cdn-dp fec00000.dp: [drm:cdn_dp_pd_event_work] Connected, not enabled. Enabling cdn
[ 2398.929957] cdn-dp fec00000.dp: [drm:cdn_dp_get_sink_capability] *ERROR* Get sink capability timed out
[ 2398.930868] cdn-dp fec00000.dp: [drm:cdn_dp_pd_event_work] *ERROR* Enable dp failed -110

Copy the code

This indicates a failure getting the capabilities (DPCD) via the firmware:
https://gitlab.com/TeeFirefly/li ... -dp-core.c#L412-413
https://gitlab.com/TeeFirefly/li ... n-dp-reg.c#L224-253

Since the above failure is a firmware call, there is no additional source code for debugging. It appears a DisplayPort firmware update will be required to address the issue.

The DisplayPort chip being used is the Parade PS176HDM verified by visual inspection of the USB-C to HDMI adapter.
https://www.paradetech.com/products/ps176/

isle · Posted at 6/28/2017 10:56:23

please refer:
commit ffc1a16eb9081347d4c32b9b2332d7d4e5b1fcd5
Author: zouxf <zxf@t-tchip.com.cn>
Date: Fri Jun 9 16:42:33 2017 +0800

ARM64: firmware: Add rockchip DisplayPort Firmware

Note:
In linux rootfs, need to copy dptx.bin to /lib/firmware/rockchip/dptx.bin

Change-Id: I5a3e2fff11fc4c070ac48ea6da25e00eec9a3089

crashoverride · Posted at 6/28/2017 20:44:56

I have confirmed the firmware is present:

firefly@firefly:~$ ll /lib/firmware/rockchip/dptx.bin
-rwxr-xr-x 1 root root 98320 Jun 27 11:45 /lib/firmware/rockchip/dptx.bin*
firefly@firefly:~$ sha1sum /lib/firmware/rockchip/dptx.bin
cc53602806f9e9b3b57a652c85d3e8eb71d011f0 /lib/firmware/rockchip/dptx.bin

Copy the code

isle · Posted at 6/29/2017 09:33:25

still don't work? I will check it later.

isle · Posted at 6/29/2017 09:57:49

my workmate have check it is workable.
so ,please check your hardware by using android OS.

crashoverride · Posted at 6/29/2017 10:39:15

I will test with the Android image. Since there is more than one Android image on the download page, can you please explicitly state which image file I should download and test?

crashoverride · Posted at 6/29/2017 21:11:18

I tested with the following Android "Firefly-RK3399_Android7.1.1_MP_170626.7z" image:
https://drive.google.com/drive/f ... gAqAbFQxWDFiNnY1MDg

No display was available over USB-C with the HDMI adapter.  The TV shows "No Signal" just as it does in Ubuntu.

Also of note is that changing the display input on the TV connected to the HDMI port causes Android to display garbage when switched back to the Firefly RK3399 device.  This, however, is a topic for a different thread and of no concern to me since I do not use Android.

I can post a link to the adapter for purchase if requested.  This would allow the Firefly team to reproduce the issue.  The adapter is similar to the Apple USB-C Digital AV Multiport adapter.  It has HDMI and USB-A (3.0) connectors with an additional USB-C port for attaching a charger.

crashoverride · Posted at 6/30/2017 02:49:38

Some additional information follows:

The USB-C chip used in the adapter is:
http://www.legendary.net.cn/html/product/TYPE-C/201507/791.html

LDR6023 is a dual port USB Type-C controller with Display port Alternate mode supported,
especially design for USB PD Docking Stations with video output.

The datasheet is also available from the above link.