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<willmore>
ssvb, I think the issue with 3.0V being used on the GPIO is not WRT logic levels, but when it's used as a power supply for an external 3.3V device. 3.0V is just above 3.3V-10% which is on the lower edge of the accepted range for a 3.3V device. A little voltage drop could push it out of spec.
<willmore>
Optionally, how would the SoC deal with getting a > 3.0V input on a GPIO if the Vio was set to 3.0V? I assume it has clamping diodes on the inputs. That might cause the external device to have to source more current on that signal line than it's designed for.
<willmore>
Either the SoC or the external device could be damaged, maybe.
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<nikre>
the uart output has a lot of missing characters. i use it for openelec.
<nikre>
isnt the baud rate 115200?
<KotCzarny>
might be some interference?
<nikre>
very short cable like 10-15cm. could it still be that?
<KotCzarny>
interference from power brick?
<wens>
loose cable?
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<nikre>
btw i try it on orange pi pc
<nikre>
maybe a special case for it?
<nikre>
or my usb-ttl is bad
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<nikre>
another thing: i enabled tvout on opipc. i see the openelec logo but when kodi starts signal is lost.
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<KotCzarny>
hrm, how to change simplefb resolution in mainline?
<KotCzarny>
it doesnt seem to react to cmdline option starting with disp.
<KotCzarny>
it seems to correctly pick up hdmi monitor resolution automatically (which is nice), but i would like to run in lower mode (ie. 640x512 for speeding things up)
<nikre>
retro pi?
<KotCzarny>
nah, trying to make mplayer workable/watchable
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<ssvb>
KotCzarny: for configuring simplefb you need to change the screen resolution in U-Boot
<ssvb>
as for mplayer on the mainline kernel, it needs at least yuv planes support for kms
<KotCzarny>
yeah, noticed that
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<KotCzarny>
ssvb, how do i change res in uboot?
<KotCzarny>
(my google skills fail me regarding sunxi/hdmi/fb res)
<ssvb>
that's a good question, right now it uses edid but maybe there is a way to override the resolution using some environment variable
<ssvb>
if you find a solution, please document it in the wiki :-)
<KotCzarny>
hehe
<KotCzarny>
ssvb, any chance to add yuv planes support to fbturbo? xv entension?
<ssvb>
xv extension is the x server thing
<ssvb>
fbturbo is the ddx, or in other words a glue between the kernel and the x server
<ssvb>
the kernel needs to provide an interface for setting up yuv planes/layers
<KotCzarny>
i was thinking about some kind of emulation
<KotCzarny>
virtual device
<ssvb>
oh, do you mean software accelerated yuv->rgb conversion and scaling?
<KotCzarny>
yup
<ssvb>
yes, it's kind of been on my low priority todo list for years
<KotCzarny>
lol
<ssvb>
the software rendering backend needs this for feature parity with glamor
<KotCzarny>
it would allow for more general solution than trying to find out why it uses c based conversion
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<KotCzarny>
right now:
<KotCzarny>
[swscaler @ 0xd7c748]bicubic scaler, from yuv420p to bgra using C
<KotCzarny>
[swscaler @ 0xd7c748]No accelerated colorspace conversion found from yuv420p to bgra.
<KotCzarny>
[swscaler @ 0xd7c748]using unscaled yuv420p -> bgra special converter
<KotCzarny>
another funky thing is its configuration script saying neon is unsupported on this cpu (a20)
<ssvb>
swscaler in mplayer is not particularly good
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<ssvb>
and nobody has probably optimized it with neon yet
<ssvb>
if mplayer is compiled without neon support, then video decoding is also slow
<KotCzarny>
that's why having emulated yuv* modes in fbturbo would be nice general solution
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<miasma>
where do they ship from? china? :D it can't be that expensive
<miasma>
i think we have one of the most expensive mail in finland and it's no more than around $30 to ship a SBC to china
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<apritzel>
seems like a reasonable move to avoid running into issues when the demand is very high: then you have to spend quite some money to get every board on the road
<apritzel>
so they can afford to hire people to do the packaging and stuff
<apritzel>
miasma: and skimming through the list the only country that's less than 30 bucks is the US (15$), so I guess this is the origin