Mir¶

Overview of all Mir keys:

<devicename>:
  MirAndroidPlatformClientEglFlush: <comma-separated-list/"all">
  MirAndroidPlatformClientFenceSync: <comma-separated-list/"all">
  MirAndroidPlatformServerBackpressure: <boolean>
  MirAndroidPlatformServerClearFbFence: <boolean>
  MirAndroidPlatformServerEglSync: <boolean>
  MirAndroidPlatformServerPartialUpdates: <boolean>

mir-platform-android¶

Key	Description	Value(s)	Default value
MirAndroidPlatformClientEglFlush	See below	Comma-separated list (or special value „all“)	Empty
MirAndroidPlatformClientFenceSync	See below	Comma-separated list (or special value „all“)	Empty
MirAndroidPlatformServerBackpressure	See below	Boolean	False
MirAndroidPlatformServerClearFbFence	See below	Boolean	False
MirAndroidPlatformServerEglSync	See below	Boolean	Launcher argument (`default`)
MirAndroidPlatformServerPartialUpdates	See below	Boolean	False

MirAndroidPlatformClientEglFlush¶

Force GL command buffer flush on eglSwapBuffers, in case the driver doesn’t follow the spec.

MirAndroidPlatformClientFenceSync¶

Classic fence-only synchronization without GL command buffer flushing.

MirAndroidPlatformServerBackpressure¶

Allows redrawing to be skipped or not after a missed frame, similarly to SurfaceFlinger.

MirAndroidPlatformServerClearFbFence¶

Framebuffer changes only continue after the fence has been successfully waited on.

MirAndroidPlatformServerEglSync¶

Allow or avoid synchronization using EGL fencing primitives when drawing the screen.

Overrules existing launcher argument.

MirAndroidPlatformServerPartialUpdates¶

Allow partial redraws to HWC-assigned server-side buffers.

Examples¶

Device sample using:

Enabling egl flushing for every client except for lomiri and unity8
- Note that you can use ! to invert conditions and turn the allow into a deny list.
Disabling egl sync for the server
Enabling partial updates for the server

Config file:

$ cat /etc/deviceinfo/devices/sample.yaml
sample:
  MirAndroidPlatformClientEglFlush:
    - "!/usr/bin/unity8,!/usr/bin/lomiri,all"
  MirAndroidPlatformServerEglSync:
    - false
  MirAndroidPlatformServerPartialUpdates:
    - true