<smaeul>
tuxd3v: CONFIG_VIDEO_SUNXI_CEDRUS does exist for H6, but you have to enable several things for it to show up. Try searching for it in menuconfig/nconfig.
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<tuxd3v>
smaeul, thanks, I will try menuconfig
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<grosso>
hi
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<grosso>
I have a problem with my camera, using A33 wit linux 3.4. Driver sunxi.vfe, framerate is locked at 30 fps, cannot change, but in practice it captures at 15fps
<wens>
practically no one here uses the 3.4 kernel
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<montjoie>
running 3.4 in 2020 is not sane
<grosso>
in fact we use official bsd...
<buZz>
the linux 3.4 bsd kernel?
<buZz>
oh, i guess bsd is 'board support d...something'
<buZz>
either way, this channel is about the linux kernel thats available on kernel.org
<buZz>
and getting code in that to support allwinner cpus
<KotCzarny>
:>
<KotCzarny>
but there are *bsd folks lurking around
<KotCzarny>
and i thought they do mainline drivers for bsd too
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<KotCzarny>
ahm. you mean bsp
<KotCzarny>
board support package
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<buZz>
yeah, the ancient kernels that allwinner offers arent really being developed on, grosso
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<megi>
I wonder if DE mixer's hw error can be caused by lack of bandwidth on the input
<megi>
I'm probably stressing the memory bus somewhat with the rotation engine in/out, csi capture dma, and display dma with 3 different planes and scaling going at the same time, and if priorities don't align right, sometimes mixer will take a hit and disable the layer input
<megi>
everything is basically running on dma
<megi>
and maybe sometimes the timing of incomming csi frame and rotation and de dma happening at the precisely same time align and the memory bus get overloaded
<megi>
I can probably try to increase the memory stress even more, to see if it starts failing even more often...
<megi>
that might verify it?
<megi>
it's certainly not happening if I'm not using the rotation engine
<megi>
and it seems that rotation engine is not naturally throttled by any external timings, it just runs the rotation as fast as it can read/write data from the memory
<megi>
maybe I can change dma memory access priorities somewhere?
<mripard>
megi: there's a bug/feature in DE1 where you would read random registers content too in some situations
<megi>
hmm
<mripard>
iirc, there's a commit bit in the backend to make the device use the values you programmed in the registers
<mripard>
and it's not immediately cleared
<mripard>
and if you read a register while you have a commit in flight, you'll read the value from another register
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<mripard>
maybe throwing the rotation engine into the mix just change the timings of your accesses and put it into a similar window?
<megi>
interesting, I'll look into it more, though it seems that when I force the mixer to enable the layer right after it reads back it's disabled, I can still see some flash on the screen, so there's probably real failure there somewhere
<mripard>
yeah, I'm not saying it's what you're seeing, just that it might be a lead
<mripard>
the memory bandwidth is definitely one worth looking into :)
<megi>
and that regmap_bits_update call would not actually write back the wrong value with LAYER_EN 0
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<keesj>
so my a10-lime board usb does not work and I am mostly guessing this is a dtb issue. what is a good place to start looking
<megi>
so even if the read is persistent
<megi>
s/even if//
<megi>
mripard: thanks for the lead
<mripard>
megi: depending on the SoC, the MBUS is supposed to have some probes that could help you see if it comes from the memory side
<megi>
right, that looks better, and it's what mripard suggested to me
<megi>
when I posted my patch
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<jernej>
has anyone issues with IR on H5 with Linux 5.4 ?
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<damex>
is it expected for h5 board to be surprisingly hot ? i have (not so big) heatsink on https://linux-sunxi.org/Libre_Computer_Board_ALL-H3-CC and when i do compute (compile kernel?) - temperature rise very high like 95*C. does it desperately need a fan?
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<megi>
damex: that's rather hot, though H5 doesn't have cpufreq in the mainline kernel, so it's probably running constantly on whatever voltage/frequency set by u-boot
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<z3ntu>
Hi, does anybody know how to get Kodi working with Cedrus?
<z3ntu>
(or how to use any other media player with cedrus, up-to-date documentation seems to be non-existant for cedrus, I just find stuff from 2017 or before)