How to display different color on a port led with different speed?

[appleCh]

According to https://github.com/Azure/SONiC/wiki/Port-Breakout-High-Level-Design,
A 100G port can be breakout to four 25G ports.
If we want to use two color to recognize port speed,
such as port up at 100G with white coler, non-100G with green color,
Have any porting guide to reference?

As far as we know that init port led is by "rcload ${PLATFORM_DIR}/led_proc_init.soc "
(https://github.com/Azure/sonic-buildimage/blob/master/platform/broadcom/docker-syncd-brcm/start.sh),
it use "led auto on" command to register led linkscan callback.
The cb seems only trun on 0x01 present LINKUP, we can not know the port up with what speed.

[serhepopovych]

One of the possible approach for doing this is turn off "led auto off" for all LED processors in your switch and write led_control.py service for your switch as described here: https://github.com/Azure/SONiC/wiki/Porting-Guide and control LED colors manually.

In most cases you may control LEDs using bcmcmd "setreg <led_microprocessor_register> " .
Register is specific to your platform/device.

As side effect you will loose ability to control LED blinking if that supported by led_proc_init.soc.

[lguohan]

there is a bigger question of whether sonic should have a standardized front panel port led scheme depending the coloring supported by each platform. we need to have a community discussion first on that.