<srao>
so far their chips seem nice and simple relative to others I've worked on, a good thing
<srao>
I haven't seen a lot of actual data on the a12/a17 micro architecture, but it was derived from cortex a9
<srao>
so I'd guess compiling for A9 would be okay
<naobsd>
sadly most people just have interest about "can I see HD videos on (name of major distro) on rockchip?", so it's not good chip for them ;)
<naobsd>
I guessed A15 is better, but I didn't try benchmark etc yet
<amstan>
can't the rk3288 play hd video?
<naobsd>
sorry, (name of major _Linux_ distro)
<amstan>
I don't see what linux has to do with it
<amstan>
the drivers perhaps?
<naobsd>
in other words "is hardware decoder working? on Linux"
<amstan>
What's stopping you from taking the android kernel and using it in your own distro?
<naobsd>
there is kernel driver, but userland library does real work for VPU
<amstan>
i see
<naobsd>
like Mali
<srao>
a12/a17 is probably slower clock for clock against a15
<srao>
but uses much less power
<srao>
re video decode, I don't know if any popular linux media players support openmax, but that's probably the easiest way to get accelerated video decode
<naobsd>
instruction sets should be same as a15, so -march=cortex-a15 will be good
<naobsd>
no idea about -mtune
<naobsd>
Rockchip only provides binary blobs for Android
<naobsd>
libc and softfp/hardfp difference
<naobsd>
libhybris is one of answer
<naobsd>
ah
<srao>
i was suggesting -mtune=cortex-a9
<naobsd>
probably userland library for Mali for chromeos can be used on Linux too
<srao>
Mali is for 3d graphics, not for video decode though
<naobsd>
yes, I'm sure
<naobsd>
and I wanted to ask "is VPU working on chromeos/rockchip?" :)
<naobsd>
CPU is fast, software decoding will be fine for some HD videos
<srao>
i don't think we've started looking at that yet
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<naobsd>
and software decoding and rendering video frames to GL surface may be enough, but it uses CPU
<naobsd>
existing "Linux for Rockchip" doesn't use any hardware accelerator include 2D :(
<naobsd>
decoding, color space conversion, drawing are done by CPU
<srao>
hopefully at least 2d will work on mainline kernels at some point in the near future
<naobsd>
I hope so. what I talked is about RK3188 and older
<srao>
ah ok, not sure how similar the 2d on 3288 is vs 3188... we're only looking at 3288
<srao>
it might be pretty similar, 2d stuff tends to not change much
<naobsd>
I think there are new units related to 2d/video
<naobsd>
RGA2 and I...
<naobsd>
anyway
<naobsd>
it's very nice that so many guys are working for rk3288 :)
<naobsd>
rk3288 uses 3.10 kernel with dts/dtb
<naobsd>
hacking random rk3288 products on market is relatively easy (compared to rk3188 and older)
<naobsd>
I want to try chromium os too :)
<naobsd>
(lets do community thing 1st...)
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<srao>
not sure if you've heard of crouton, but that will let you run an ubuntu chroot inside chrome os
<srao>
with graphics sound, etc
<naobsd>
interesting, but I have to learn how to run/use chromium os on rockchip at 1st :)
<naobsd>
but I will not buy any RK3288 product for consumer anymore. I'm waiting dev board :)
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<rperier>
hi all
<naobsd>
hi
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<karlp>
that cloudnetgo box has the same odd choice of a fullsize usb a port being used for OTG.
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<naobsd>
karlp: oh I missed it :(
<naobsd>
I have A-A cable, but I don't like it ;)
<karlp>
yeah, I don't like it either, my minix neo x5 mini does the same thing, it's not pretty.
<karlp>
to try and stop things blowing up, it always puts the port back in host mode when it boots, you have to set a checkbox in android and reboot to get it to device mode,
<karlp>
(or hold down the reset button at boot)
<naobsd>
yup, no ID pin :(
<rperier>
mmind00: done ;)
<naobsd>
return to home...
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