<jogoes>
Hi guys, I am trying to configure the V3S UART in order to achieve a baudrate of 4Mbits/s. But when I modify the registers, my debug UART crashes. Has anybody managed to get that baudrate?
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<Pe3ucTop>
jogoes: in short - there is no easy way to get precise 4M Baudrate, there is many different rates higher and lower, but those values not comfortable to use.
<jogoes>
Is it no possible to get 4Mb by modifying APB2 register and using as clock input PLL600 instead of 24MHOSC?
<Pe3ucTop>
jogoes: jep, best you can get around 4M is : 4.166(6)M and 3.75M
<jogoes>
And, do you know which files should I modify in order to get that $Mb baudrate? I know the registers, but I cannot find the kernel files where I should make the modifications
<Pe3ucTop>
or you need to use APB2 not 600Mhz (which is suggested to Do NOT set other then 600M by Allwinner datasheet).
<Pe3ucTop>
jogoes: you can change frequency source for UART in devicetree (for mainline kernel)
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<jogoes>
I think I have no devicetree file...
<Pe3ucTop>
jogoes: which version of kernel do you use ??
<jogoes>
3.4
<jogoes>
duoxc
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<jogoes>
just 3.4
<Pe3ucTop>
ok, sorry can't help on legacy kernel configuration. Look for APB2 initialization drivers, but where it is setup in u-boot or kernel I don't know.
<jogoes>
ok!!
<jogoes>
thank you very much anyway
<jogoes>
And, do you know if it is possible to use hardware video encoding decoding on linux versions higher than 3.4?
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<Pe3ucTop>
Did not tried yet, but going to near future.
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<freelikegnu>
qq what versions of OpenGL or OpenGL ES will the blob mali driver support
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<freelikegnu>
mali-400 MP2 to be precise
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<icenowy[m]>
OpenGL ES 2.0
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<freelikegnu>
thank you icenowy[m] :D
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<paulk-gagarine>
mhh, I can't see the kernel booting (it probably doesn't) running U-Boot 2017.05 and Linux 4.12 on both a Cubieboard2 and Lamobo-R1
<paulk-gagarine>
is there a trick to it?
<paulk-gagarine>
I\m loading the zImage and the dtb from extlinux, which seems to go fine
<paulk-gagarine>
I've tried with two different sdcards
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