Dvfs; Display; Camera - VIA Technologies SOM-3000-STK Quick Start Manual

To check the BSP version, use the following command:
console:/ # cat /proc/version

3.4 DVFS

To verify the DVFS (Dynamic Voltage Frequency Scaling) function and list all the supported features, use the
following commands:
console:/ # ls -l /sys/devices/system/cpu/cpu0/cpufreq/
total 0
-r--r--r-- 1 root root
-r-------- 1 root root
-r--r--r-- 1 root root
-r--r--r-- 1 root root
-r--r--r-- 1 root root
-r--r--r-- 1 root root
-r--r--r-- 1 root root
-r--r--r-- 1 root root
-r--r--r-- 1 root root
-r--r--r-- 1 root root
-rw-r--r-- 1 root root
-rw-rw---- 1 system system 4096 2000-01-01 00:00 scaling_max_freq
-rw-rw-r-- 1 system system 4096 2000-01-01 00:00 scaling_min_freq
-rw-r--r-- 1 root root
drwxr-xr-x 2 root root
drwxr-xr-x 2 root root
console:/ #
To check the supported and current CPU frequency, use the following commands:
console:/ # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
850000 918000 987000 1056000 1125000 1216000 1308000 1400000 1466000 1533000 1633000 1700000
1767000 1834000 1917000 2001000
console:/ # cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
1633000

3.5 Display

There is no need to set the display device. If you connect an HDMI display, HDMI output will be automatically
enabled after booting. If you connect an LCD panel, LCD panel output will be automatically enabled after
booting.

3.6 Camera

If a desired CSI camera module was connected correctly to the VIA SOM-3000 starter kit before booting the
VIA SOM-3000 starter kit, a "Camera" APK can be found on the Android desktop. Click to open it and test the
camera functions.
If the CSI camera module was connected correctly before booting the VIA SOM-3000 starter kit, but there is no
"Camera" APK on the Android desktop, navigate to "Settings > System > Reset options" and click "Erase all data
VIA SOM-3000-STK Android 12.0 EVK Quick Start Guide
4096 2022-02-24 18:16 affected_cpus
4096 2022-02-24 18:16 cpuinfo_cur_freq
4096 2022-02-24 18:16 cpuinfo_max_freq
4096 2022-02-24 18:16 cpuinfo_min_freq
4096 2022-02-24 18:16 cpuinfo_transition_latency
4096 2022-02-24 18:16 related_cpus
4096 2000-01-01 00:00 scaling_available_frequencies
4096 2022-02-24 18:16 scaling_available_governors
4096 2022-02-24 18:16 scaling_cur_freq
4096 2022-02-24 18:16 scaling_driver
4096 2022-02-23 15:46 scaling_governor
4096 2022-02-24 18:16 scaling_setspeed
0 2022-02-24 18:16 schedutil
0 2000-01-01 00:00 stats
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