Configuring OpenWF Display Server

You configure the OpenWF Display server from the wfd device 1 section of your graphics configuration (e.g., graphics.conf) file.

When you're running Screen and OpenWF Display Server on your system, you must start wfd-server before Screen by using the -c option and specifying the same graphics configuration file.

Configuring wfd device 1 section

In your configuration file, you need to specify the parameters that are related to your display device and the OpenWF Display server. In the wfd device 1 section, ensure that you have the appropriate pipelines and libraries specific to your display. For example, 

...
  begin wfd device 1
    wfd-server-config-device1 = 1,2,3,4,5,6,7,9,10,11,12,13,14,15,16
    wfd-server-config-device2 = 8
    wfd-server-config-device2-power-ports = 1,2 
    wfd-server-config-device3-writeback-ports = 1,2
    wfd-server-alloc-config = jacinto7-alloc
    wfd-dlls = libWFDclient.so
    wfd-server-wfd-dlls =  libwfdcfg-generic.so libWFDjacinto7.so
  end wfd device
...

Parameters

The following are parameters that you can configure under the wfd device 1 subsection for OpenWF Display Server:

Parameter Description Type Example/Notes
wfd-server-alloc-config The name of the platform-specific module that's used for buffer allocation. The OpenWF Display Server uses the following algorithm to determine the allocater module to load: 
"screen-" + <value of alloc-config> + ".so"
Note:
  • When you're using wfd-server and you're configuring this parameter, ensure that the alloc-config parameter is omitted from the globals section of your configuration file.
  • There's no need to include this wfd-server-alloc-config parameter if your WFD driver isn't compatible with an allocator module. However, in this case, you must ensure that the WFD driver supports the wfdCreateWFDEGLImagesQNX() extension.
String 
jacinto7-alloc
wfd-server-config-device%d Pipelines that are available for the client specified by %d to post buffers directly to the display controller via WFD API and extensions.
Note:
If you specify a pipeline identifier that's not supported by the WFD driver on your hardware platform, wfd-server won't start. Use the -e option to wfd-server to see a list of pipeline identifiers that are supported on your target platform.
Specify the client identifier %d as an integer in the range of [1..(WFD_MAX_INT-1)]. where WFD_MAX_INT is 16777216. Screen must be configured as wfd-server-config-device1.

Use wfd-server-info for information on the current setup.

 Integer list

(comma-

separated)

 Range varies based on your display device.
wfd-server-config-device
                                %d-power-ports 		Ports that the client specified by %d can control the power of. For example, if you specify 
wfd-server-config-device3-power-ports = 1,2
in your configuration, this allows the client application that's identified as device 3 to be able to call wfdSetPortAttribi() to set the WFD_PORT_POWER_MODE attribute on ports 1 or 2. Otherwise, if multiple client applications are using the same port, wfd-server may not permit a client application to change the power on that port.

Specify %d as an integer in the range of [1..(WFD_MAX_INT-1)]. where WFD_MAX_INT is 16777216. Screen must be configured as wfd-server-config-device1.

Integer list

(comma-

separated)

 Range varies based on your display device.
wfd-server-config-device
                                %d-writeback-ports 		Ports that the client specified by %d can use for writeback. For example, if you specify 
wfd-server-config-device3-writeback-ports = 1,2
in your configuration, this allows the client application that's associated with device 3 to be able to use ports 1 and 2 for writeback.
Note:
Writeback support is available only to client applications that are rendering using image buffers. Writeback isn't supported for Screen applications.

Specify %d as an integer in the range of [1..(WFD_MAX_INT-1)]. where WFD_MAX_INT is 16777216.

Integer list

(comma-

separated)

 Range varies based on your display device.
wfd-dlls The OpenWF Display Client library. You must specify libWFDClient.so for this parameter when you're using wfd-server. Otherwise, specify the platform-specific WFD drivers and Wfdcfg library for Screen. String 
libWFDClient.so
wfd-server-wfd-dlls The platform-specific WFD drivers when you're using wfd-server. String 
  • libwfdcfg-generic.so
  • libWFDjacinto7.so
Note:

On your target, all platform-specific libraries that you specify in this wfd device subsection of your configuration file should be accessible in your library search path.

For more information on the graphics configuration file, refer to the Configuring Screen chapter of the Screen Developer's Guide.

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