Table 14. Kernel boot parameters (continued)
Kernel parameter
Description
Typical value
Used when
androidboot.displaymode
It is used to
configure the
kernel/driver work
mode/fps.
• 4k display should be
configured as:
androidboot.displaymode=
4k. The default fps is
60fps. To configure fps,
change this value to
4kp60/4kp50/4kp30.
• 1080p display should be
configured as:
androidboot.displaymode=
1080p. The default fps is
60fps. To configure fps,
change this value to
1080p60/1080p50/1080p3
0.
• 720p display should be
configured as:
androidboot.displaymode=
720p. The default fps is
60fps. To configure fps,
change this value to
720p60/720p50/720p30.
• 480p display should be
configured as:
androidboot.displaymode=
480p. The default fps is
60fps. To configure fps,
change this value to
480p60/480p50/480p30.
The system will find out and work at the
best display mode, and display mode can
be changed through this bootargs.
androidboot.fbTileSupport It is used to
enable
framebuffer super
tile output.
androidboot.fbTileSupport=ena
ble
It should not be set when connecting the
MIPI-to-HDMI display or MIPI panel
display.
firmware_class.path
It is used to set
the Wi-Fi firmware
path.
firmware_class.path=/vendor/
firmware
-
androidboot.wificountrycod
e=CN
It is used to set
Wi-Fi country
code. Different
countries use
different Wi-Fi
channels.
androidboot.wificountrycode=C
N
For details, see the
.
transparent_hugepage
It is used to
change the sysfs
boot time defaults
transparent_hugepage=never/
always/madvise
-
Table continues on the next page...
NXP Semiconductors
Booting
Android
™
User's Guide, Rev. P9.0.0_2.3.2, 6 March 2020
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