feat: Add Rockchip MPP plugin for hardware encoder/decoder monitoring

[csvke]

Summary

Adds a new MPP (Media Process Platform) plugin to monitor Rockchip hardware video encoder/decoder engines in real time. This is the codec counterpart to the existing NPU plugin.

Rockchip SoCs expose per-engine load and session information through /proc/mpp_service/. This plugin reads that data and displays it in both the TUI and WebUI.

What it monitors

Engine	Type	Description
RKVENC	Encoder	Hardware H.264/H.265/MJPEG encoder
RKVDEC	Decoder	Hardware H.264/H.265/VP9/AV1 decoder
RKJPEGD	JPEG Decoder	Hardware JPEG decoder

For each engine:

• Load % — percentage of time the engine was busy in the polling interval
• Utilization % — effective utilization accounting for clock scaling
• Active sessions — number of encode/decode sessions currently using the engine

Implementation

Backend (glances/plugins/mpp/)

• cards/mpp.py — MPPStats dataclass
• cards/rockchip_mpp.py — Reads /proc/mpp_service/load and /proc/mpp_service/sessions-summary
• __init__.py — MppPlugin class with fields_description, history tracking, alert thresholds, and curses rendering

Key details:

• Auto-sets /proc/mpp_service/load_interval to 1000ms if not already configured (required for the kernel to report load stats)
• Parses the load format: 21f40000.rkvenc load: 24.80% utilization: 24.39%
• Counts sessions per engine from the sessions-summary

TUI (glances/outputs/glances_curses.py)

• Added 'mpp' to the _top bar between NPU and GPU
• Hotkey 8 toggles MPP display @nicolargo you may want it with another hotkey, you decide :)
• Updated fullquicklook methods

WebUI

• New Vue component: plugin-mpp.vue
• Registered in App.vue (import, component, template, hasMpp() computed property)
• Added to uiconfig.json topMenu
• CSS styling in style.scss
• Rebuilt webpack bundle

Configuration

Add to glances.conf:

[mpp]
disable=False
load_careful=50
load_warning=70
load_critical=90

Testing

Tested on Rockchip RV1126B-P board with ffmpeg rkmpp hardware transcode:

# Generate load: HW decode → HW encode
ffmpeg -c:v h264_rkmpp -i input.mp4 -c:v h264_rkmpp -b:v 2M output.mp4

TUI output (glances --stdout mpp):

mpp: [{'engine_id': 'rockchip_rkvenc', 'name': 'RKVENC', 'type': 'enc', 'load': 23.81, ...},
      {'engine_id': 'rockchip_rkvdec', 'name': 'RKVDEC', 'type': 'dec', 'load': 26.91, ...},
      {'engine_id': 'rockchip_jpegd', 'name': 'JPEGD', 'type': 'jpeg', 'load': 0.0, ...}]

Results during H.264 HW transcode:

• RKVENC: ~23-25% load, 1 session
• RKVDEC: ~25-28% load, 1 session
• RKJPEGD: 0%, idle

Affected devices

• RV1126B (confirmed)
• Should work on any Rockchip SoC with /proc/mpp_service/ (RK3588, RK3576, RK3568, RK3566, RK3399, etc.)
• Non-Rockchip systems are unaffected (plugin detects /proc/mpp_service/ availability)

[nicolargo]

Hi @csvke

thanks for the PR. Before merging into develop some changes are needed:

1. Add the following section in the default ./conf/glances.conf file

[mpp]
disable=True
load_careful=50
load_warning=70
load_critical=90

Note: the plugin should be disabled by default because it is not a top stat to monitor on a system.

2. Add documentation in the ./docs/aoa folder.

3. if relevant add somes units tests.

Thanks !