lanefu changed the topic of #armbian-rockchip to: Armbian - Linux for ARM development boards | Rockchip SoC | www.armbian.com | This channel is relayed to the equivalent Discord channel | this channel is logged
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<DC-IRC>
<lanefu> Oh weird.. there's a gremlin where some sort of unisoc wifi patch is being applied on rockchip64 current,edge even with EXTRAWIFI=no
<DC-IRC>
<lanefu> causing patching failure...
<DC-IRC>
<lanefu> BUT if you build EXTRAWIFI=yes everything succeed lol..
<DC-IRC>
<lanefu> yeah need to move the patch to the harness or ditch it i guess
<DC-IRC>
<viraniac> yes, if that patch depends on driver harness, It must be placed in driver harness
<DC-IRC>
<meneerkim> The rock5b has HDMI-in, is it possible to change the edid file that it sends out?
<DC-IRC>
<tenkawa42> From my understanding no, that is a physical limitation
<DC-IRC>
<tenkawa42> The internal wiring of the board for HDMI in is completely different than out.
<DC-IRC>
<meneerkim> What do you mean with that last message? Can you elaborate?
<DC-IRC>
<tenkawa42> HDMI output does the total opposite of HDMI Input. It injects pixels, sound pitch, and now ethernet, into HDMI input. In short, HDMI Output serves like a mother who takes care of the infant, (Tv/Monitors) by supplying life-inducing colors and audio.
<DC-IRC>
<tenkawa42> So, when you see an HDMI output tag on any device, you must think of it as a mother who is ready to feed light, and sound to input that is dark. Thus, a device having HDMI Output will send data i.e. audio, video, or ethernet to input.
<DC-IRC>
<tenkawa42> In short, the sender has A/V information which it conveys to the receiver through different tools– cables, adapters, wireless devices.
<DC-IRC>
<tenkawa42> They use completely different signalling
<DC-IRC>
<tenkawa42> edid will do nothing since the "physical" hardware still expects one to be sender and receiver
<DC-IRC>
<meneerkim> Wait, as far as I understood, the EDID file is sent by the device that has the HDMI-in (E.g. a TV) am I wrong?
<DC-IRC>
<meneerkim> Wait, as far as I understood, the EDID file is sent by the device that has the HDMI-in (E.g. a TV) and then parsed by the one sending the output, am I wrong?
<DC-IRC>
<tenkawa42> yes.. but that "port".. doesn't talk to tvs that way
<DC-IRC>
<tenkawa42> it is made to receive data.. not send
<DC-IRC>
<tenkawa42> All in one pcs for example use them to make it easy to add on blueray dvd players
<DC-IRC>
<tenkawa42> @meneerkim here's good reading
<DC-IRC>
<tenkawa42> @mariob how? the HDMI input spec isn't the same
<DC-IRC>
<tenkawa42> That's the whole point
<DC-IRC>
<mariob> they want to change the edid reported by the hdmi input port
<DC-IRC>
<mariob> hdmi input acts like a screen basically
<DC-IRC>
<tenkawa42> yeah to make it an output.... its not "physicly" wired internally to be able to
<DC-IRC>
<tenkawa42> on the sbc
<DC-IRC>
<mariob> by "edid file it sends out" they were referring to the display info the rk3588 boards presents to the output
<DC-IRC>
<mariob> not to convert that port into a hdmi out one
<DC-IRC>
<tenkawa42> umm....
<DC-IRC>
<mariob> by "edid file it sends out" they were referring to the display info the rk3588 boards present to the output
<DC-IRC>
<mariob> by "edid file it sends out" they were referring to the display info the rk3588 board presents to the output
<DC-IRC>
<tenkawa42> The rock5b has HDMI-in, is it possible to change the edid file that it sends out?
<DC-IRC>
<mariob> this is done by the hdmi rx driver, i have no idea if it can be controlled from userspace
<DC-IRC>
<tenkawa42> the rock5 send nothing ... only receives
<DC-IRC>
<mariob> it does send an EDID
<DC-IRC>
<tenkawa42> yeah
<DC-IRC>
<tenkawa42> good point
<DC-IRC>
<mariob> like a regular display does
<DC-IRC>
<tenkawa42> otherwise... what good would a bt drive be either
<DC-IRC>
<tenkawa42> but being an input channel the drive (the HDMI IN.) would need to be the need the initiator doesn't it?
<DC-IRC>
<tenkawa42> but being an input channel the drive (the HDMI OUT.) would need to be the need the initiator doesn't it?
<DC-IRC>
<tenkawa42> but for example... being an input channel the drive (the HDMI OUT.) would need to be the need the initiator doesn't it?
<DC-IRC>
<tenkawa42> but for example... being an input channel the drive (the HDMI OUT.) would need to be the initiator doesn't it?
<DC-IRC>
<tenkawa42> (I truly despise video.... and this is one of the x*5000 reasons why)
<DC-IRC>
<tenkawa42> No real standards..
<DC-IRC>
<mariob> yes
<DC-IRC>
<mariob> it's the hdmi out that detects the device, reads edid from i2c and then there's some handshake going on
<DC-IRC>
<mariob> similar to how usb-pd negotiates voltage
<DC-IRC>
<tenkawa42> Yeah but if his intent was to say put 3 displays on the unit... I don't think "that" can be done... He didn't really say what practical application he was trying to solve
<DC-IRC>
<tenkawa42> Not without a expander anyway
<DC-IRC>
<tenkawa42> 2 outputs and 1 input... (Then again I don't use any of mine)
<DC-IRC>
<lanefu> indiedroid nova can drive 3 displays 😛
<DC-IRC>
<mariob> yeah on rock 5b it's tricky as the only usb-c is also used for power
<DC-IRC>
<tenkawa42> Yeah but its specificly built with 3 out not 2 out 1 in right?
<DC-IRC>
<lanefu> cirrect
<DC-IRC>
<tenkawa42> (which seems odd on a sbc)
<DC-IRC>
<tenkawa42> this all in one I was looking at for research had 1 in.. no output
<DC-IRC>
<tenkawa42> Which did make sense knowing it had no dvd/etc hard attached to it
<DC-IRC>
<tenkawa42> So attaching a Blueray especially.....
<DC-IRC>
<aashitech> very philosophical ... 😃
<DC-IRC>
<tenkawa42> That was a "pure copy/paste"
<DC-IRC>
<tenkawa42> lol
<DC-IRC>
<tenkawa42> I am nowhere that articulate with words.... now music... that's different
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