I got Android6 working onto the SECO A62 Board, starting from the Android6 imahe from A62 BSP download page. it works well but very slowly. It seems the Quad processor do not run their full speed. I installed ''system monitor light'' to see the CPU activity, and the CPU graphs show a max of 792MHz. I could change the Parameters-general-governor parameter from ''interactive'' to ''performance'' but it does not change the CPU activity to a speeder one. and I think I lose it at every reboot. does somebody have an idea how to have the full speed available, and how to keep it after reboot ? Thanks a lot for your help.
Hi @alain PAUMIER, On Dual Lite you should get these frequencies (on Quad it goes up to 1200000). cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq 996000 cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq 396000 cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq 396000 If the CPU is doing anything wrong, the frequency is supposed to be low. To see it going up you should stress the system, making it run something. For example, making it unpack a bzip. I exclude problems that force the CPU to clock at 792MHz. In the sources the frequencies that the processor can use are set here: kernel_imx/arch/arm/boot/dts/imx6q.dtsi
OK, the reason why is that the CPU is frequency limited in large Temperature range in orer to avoid the CPU overheating. I have bought a commercial temperature range which is less large, and the CPU is no more limited. With this board I could have the 4 CPU running full frequencies.
Hi @alain PAUMIER, I haven't understood: you bought another board, did you? Larger temperature ranger means that the board can resist hotter and colder temperatures, does it?
yes I bought a new board with commercial Temp. Range. This new one can only support 0° to 50° instead of -20 à° 70° so they allow the processor to run at full speed. the normal A62 in industrial T range is not allowed run at 1.2GHz By the way, this new board has also 2GB of RAM but the Android 6 image only take care of 1GB. Where can I said to Android thtat There are 2GB ? which config file do I need to change ? u-boot config file ? do I need to re-compile Android ? or can we just change a config file ?
As far as I know the guys at Seco did not implemented a way to detect the board variants So there is no u-boot capable of detecting what d-ram config is available. There is an I2C EEPROM attached to the board but as far as I know there is as-well no identification provided. So only hardcoded variant of u-boot with 2G is possible. Maybe @Andrea Rovai or @Francesco do have a tipp
Hi @graugans, hi @alain PAUMIER, you should recompile the kernel. Anyway, we've contacted SECO to know if they already have a precompiled version, so I can share it with you.
@Andrea Rovai thanks for the fast response. For the DRAM you need a special u-boot. It would be really helpful if there is a way to detect what kind of RAM is attached so I can select it in SPL code
Here is an u-boot for A62 2GB Android (attachment at the bottom of the page). It's been tested without any display, but according to the logcat at boot it should be ok. The only change is in this file Code: myandroid60/bootable/bootloader/uboot-imx/configs/mx6qdl_a62_android_defconfig this is the change Code: # Android support for A62 Quad/Dual and DualLite/Solo boards with 1024 memory size CONFIG_SPL=y CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/imx-common/spl_sd.cfg,MX6QDL,DDR_SIZE=2048,ANDROID_SUPPORT" CONFIG_ARM=y CONFIG_TARGET_A62=y CONFIG_DM=y CONFIG_DM_THERMAL=y Could you give us a feedback?
