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<
mr_rcollins >
Hmmm, Debian on CHIP doesn't seem to have drivers for FTDI usb serial
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<
karlp >
ok. buildroot gave me a console. progress I guess :)
00:57
<
mr_rcollins >
The serial port shows up fine on a Pi...
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MoeIcenowy >
yann: for libgbm, you need to use gbm variant of libMali
03:22
<
MoeIcenowy >
or usually wayland variant is also capable of gbm (because it's needed to run wayland compositor)
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chewitt >
(not sure what the H3 uses)
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hlauer >
a20/bananaPro, 5.4 kernel, tas571x.c, sun4i-i2s.c: Here is the failing aplay strace line which may be relevant: openat(AT_FDCWD, "/dev/snd/pcmC0D0p", O_RDWR|O_NONBLOCK|O_CLOEXEC) = -1 EINVAL (Invalid argument)
09:22
<
hlauer >
sorry for not having seen the request from codekipper a week ago
09:26
<
yann >
MoeIcenowy: but then, the gbm variant does not seem to be part of the sunxi-mali repo, or am I missing something ?
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rellla >
yann: use the libs, chewitt linked. you need the corresponding kernel driver, too. take the r7p0 variant and use it with r9p0-multiplatform kernel driver. works here.
10:30
<
rellla >
though you also may build the libgbm wrapper to use the newer functions, which are not included in libmali
10:32
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yann >
oh I had missed chewitt's answer - thanks!
10:35
<
rellla >
yeah, and build it like libreelec does...
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<
LordDoskias >
why doesn't the sunxi gpio driver expose pull up/pull down resistor configuration via sysfs
14:19
<
LordDoskias >
in the legacy gpio interface /sys/class/gpio ?
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plaes >
LordDoskias: gpio sysfs interface is deprecated since 4.8
16:17
<
LordDoskias >
indeed but that doesn't mean it's not working
16:18
<
LordDoskias >
OTOH does it mean if i use libgpiod i can set the pull up/down characteristics of a pin and it will work?
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plaes >
so far I have only used sysfs :(
16:18
<
LordDoskias >
actually searching for PULL in gpiod.h there is nothing so i assume it cannot be done
16:19
<
LordDoskias >
it can be done via the DT with the respective properties of a pin but i'd like to do it runtime
16:19
<
LordDoskias >
seems that's not possible atm ;(
16:19
<
mru >
unless it changed recently, the kernel doesn't have a userspace api to do taht
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<
LordDoskias >
so gpiod doesn' support pull up down
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<
LordDoskias >
mru, the only user space api is if this was exposed through the sysfs file
16:21
<
mru >
the api libgpiod uses ought to have that functionality but it doesn't
16:22
<
mru >
so libgpiod can't do it either
16:22
<
plaes >
so yes, might be "soon" :D
16:23
<
LordDoskias >
but how come the old interface supported that?
16:23
<
mru >
which old interface?
16:23
<
LordDoskias >
sysfs
16:23
<
mru >
uh, it doesn't
16:24
<
plaes >
it didn't, you could only specify active-low, active-high
16:24
<
LordDoskias >
on RPI there was a file
16:24
<
mru >
at least not all drivers
16:24
<
plaes >
ah.. RPI has custom driver
16:24
<
LordDoskias >
that i'd echo 1 to the pull-up file
16:24
<
LordDoskias >
ah right...
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<
LordDoskias >
alternatively i'd have to map the source code to the debugfs entries perhahps there might be one
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<
martinayotte >
alternatively, you could use "devmem" to actually control pinctrl pullup/pulldown registers.
20:10
<
yann >
chewitt: problem is, that gbm version is gbm-only. I am looking for an X11 version that has GBM support, after seeing that eg. the midgard aarch64 version has that, as glmark2 fails to configure in any configuration when it fails to find gbm
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yann >
I'll rather dig in the lima direction, that is probably a best usage of my time :)
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<
rellla >
yann: glmark2 works with the gbm only blob btw.
20:48
<
yann >
but I guess it will only be in drm mode, not x11, right ?
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