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<suprothunderbolt>
i'm attempting to get i2s to work with codec as master and so I set a fixed-clock for the osc / crystal but the frequency reported in the driver isn't what I set in the device tree
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<suprothunderbolt>
oh I see the issue. I can play or record but when I do both at once the LRCLK is wrong, it's two wave forms on top of each other
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<paulk-leonov>
hey -- has anyone tried mesa llvmpipe on A83t/H8?
<paulk-leonov>
I'd expect that the 8 cores allow somewhat-efficient rendering
<Mangy_Dog>
Can anyone tell me what the on oad wattage is of the H3? and H5?
<Mangy_Dog>
trying to figure out how much cooling i need to provide my thing
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<KotCzarny>
without any devices connected it draws ~0.3-0.5A in idle android (h3)
<KotCzarny>
with load it can go up to 1-2A
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<KotCzarny>
hope you have added voltage regulation on your design
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<JohnDoe_71Rus>
Sorry, android is here offtopic. How do you think, is it possible build image android (> oreo) with mainline kernel for the A13 tablet?
<Mangy_Dog>
not a regulator but a 5v boost
<Mangy_Dog>
well i guess it has an internal reg
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<mru>
what part are you using?
<Mangy_Dog>
but i think i need to double check it can do up to 2 amps
<Mangy_Dog>
mt3608
<mru>
obscure
<mru>
why not something mainstream from ADI or TI?
<Mangy_Dog>
source current 4 amp
<Mangy_Dog>
im following another design for this part of the circuit
<Mangy_Dog>
i dont know power boost circuits too well
<mru>
following the datasheet recommendations usually works
<Mangy_Dog>
2A Step Up Converter
<Mangy_Dog>
silly me says it right ast the top of the datasheet
<mru>
but nowhere in the electrical characteristics table
<Mangy_Dog>
blame great scott for this one :p
<Mangy_Dog>
its his design
<Mangy_Dog>
well the whole charge and rail circuit
<mru>
what are your input and output voltages?
<Mangy_Dog>
lipo in
<Mangy_Dog>
5v out
<mru>
so ~3-4 V in
<Mangy_Dog>
4.3 yeah
<Mangy_Dog>
4.2~
<mru>
that'll drop as the battery discharges
<Mangy_Dog>
yeah
<mru>
look at the characteristics graphs
<mru>
the load regulation doesn't look good at high Iout
<mru>
what are you powering with this?
<Mangy_Dog>
a lipo....
<Mangy_Dog>
ohh
<mru>
no, that's what you're powering it with
<Mangy_Dog>
a handheld game machine
<KotCzarny>
Mangy_Dog: nope, i was talking about voltage regulator for soc/cpu
<Mangy_Dog>
orange pi zero plus
<Mangy_Dog>
as a base
<mru>
well, that should have onboard regulators
<KotCzarny>
unless you use ready made board and not own design
<Mangy_Dog>
what stepuo chip should i use then for this?
<mru>
fwiw, we've noticed that the nanopi neo core (H3 based) is sensitive to brownouts
<mru>
Mangy_Dog: this chip will likely be fine
<Mangy_Dog>
that isnt instilling confidance :p
<mru>
we just added an external watchdog
<mru>
the internal one dies along with everything else in certain brownout conditions
<mru>
which we never bothered investigating in detail
<mru>
now about that boost converter, wth is aerosemi and where do you even buy this thing?
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<Mangy_Dog>
ali i expsect
<Mangy_Dog>
hmmm nm need a different regulator
<mru>
not necessarily
<Mangy_Dog>
even in greatscotts video could only get 1amp before voltage breakdown
<ndufresne>
marcodiego, imx.6 have an opensource (and well supported in gst) driver, it's called coda, Coda is the name of the chip made by chips&media
<ndufresne>
marcodiego, for IMX8, it's a different chip, Hantro G1/G2/H1, there is work in progress on that one, but for GStreamer support it's a bit more complex, we will likely implement that as a VAAPI driver as a first step
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<marcodiego>
ndufresne, but it needs a proprietary firmware, right?
<marcodiego>
ndufresne, AFAIK the hantro is the same chip on some rochip soc's, right? Also, AFAIK, they don't need proprietary firmware. Can we hope for IMX8 no longer needing proprietary drivers or firmware in the future?
<ndufresne>
CODA needs proprietary firmware, Hantro requires no firmware
<ndufresne>
marcodiego, so yes, except for the IMX.8 plus (not to sure of the name) for which the accelerator (which is unknown chip) is wired to a cortex M0, which needs to run a firmware
<marcodiego>
ndufresne, cool! Where/how can I track the effort to free IMX8 VPU?
<ndufresne>
marcodiego, one of paulk-leonov long term goal, would be to start reversing the firmware code, extracting the bit that controls the accelerator, and then implement a family of open source firmware with a common interface, but simple firmware, that would just expose the accellerators
<paulk-leonov>
ndufresne, is there even a firmware in the first place for the i.mx8?
<ndufresne>
marcodiego, I think it's in pH5 mind for now, bbrezillon have something working for the RK3288, Kwiboo figure-out the missing bits for interlaced context, and found an issue with scaling list, but appart from that, it will be how to figure-out the form for a generic driver that can be shared
<marcodiego>
ndufresne, I saw that. Is there any public repository or mailing list where this is being developed/discussed so that I can follow it?
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<ndufresne>
paulk-leonov, depends on which imx.8, that's what's I was saying, the one with Hantro G1/G2/H1 don't have firmwares, the IMX.8 plus needs one
<paulk-leonov>
ndufresne, oh right, thanks
<ndufresne>
we've used mostly #v4l channel to discuss, give me a second for repo links
<ndufresne>
marcodiego, you'll also find patchset in master of LibreELEC
<marcodiego>
ndufresne, Thanks! I already followed these. Is there anything IMX specific or getting the one for rk working means it will also work for IMX?
<ndufresne>
clocks and their settings are propably SoC specific, I would not be surprise if mmu stuff is also SoC specific
<ndufresne>
we haven't worked on that at all yet
<ndufresne>
all we know, is that the interrupt, controls and parameters registers are the same
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