plankton_display

Source code: plankton_display.py

Tests USB type-C DP function with Plankton.

Description

See here for Plankton introduction.

1. There is a fixture called Plankton-Raiden, which links/unlinks the DUT USB Type-C port.

2. There is another fixture called Plankton-HDMI, which is a DP sink and it can capture the DP output and verify it.

This test uses these fixtures to test USB type-C DP function.

Internal references

1. http://go/plankton_v3

2. http://go/cros-plankton-hdmi-introduction

Test Procedure

This is an automatic test that doesn’t need any user interaction.

Dependency

• bft_fixture

• Plankton

Examples

No example is found.

Test Arguments

Name	Type	Description
bft_fixture	dict	A dictionary with the following items: class_name Fully-qualified class name of the BFTFixture implementation to use. params A dictionary of parameters for the BFTFixture class’s Init() method. The default value of None means that no BFT fixture is used.
usb_c_index	int	Index of DUT USB type-C port
bft_media_device	str	Device name of BFT used to insert/remove the media.
display_id	str	Display ID used to identify display in xrandr/modeprint.
capture_resolution	list	(optional; default: [1920, 1080]) [x-res, y-res] indicating the image capture resolution to use.
capture_fps	int	(optional; default: 30) Camera capture rate in frames per second.
uvc_video_dev_index	int	(optional; default: -1) index of video device (-1 for default)
uvc_video_dev_port	str, None	(optional; default: None) port of video device (ex. 3-1)
corr_value_threshold	list	(optional; default: [0.8, 0.8, 0.8]) [b, g, r] channel histogram correlation pass/fail threshold. Should be int/float type, ex. [0.8, 0.8, 0.8]
dp_verify_server	str, None	(optional; default: None) Server URL for verifying DP output, e.g. “http://192.168.0.1:9999”. Default None means verifying locally.
verify_display_switch	bool	(optional; default: True) Set False to test without display switch, and compare default wallpaper only (can save more testing time).
force_dp_renegotiated	bool	(optional; default: False) Force DP to renegotiate with plankton by disconnecting TypeC port
fire_hpd_manually	bool	(optional; default: False) Fire HPD manually.