rellla changed the topic of #linux-sunxi to: Allwinner/sunxi /development discussion - did you try looking at our wiki? https://linux-sunxi.org - Don't ask to ask. Just ask and wait! - https://github.com/linux-sunxi/ - Logs at http://irclog.whitequark.org/linux-sunxi - *only registered users can talk*
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<noblock> H5: Do you know, if we can have a mali frequency higher than 297Mhz? clk_set_rate generate nothing higher than 297Mhz...
<noblock> q
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<catphish> yay pointless success: https://i.imgur.com/oumvyY5.png
<catphish> low resolution framebuffer, hardware scaled to 1080p with software sprite placer :)
<catphish> what little antialiasing remains doesn't detract from what i was trying to achieve
<catphish> and now i must sleep
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<lykt> \join #armbian
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<crmingle> Hi all, anyone have any experience with RTL836x switches and H3 boards?
<crmingle> I'm using mainline linux and having issue trying to get the mdio-bus to communicate with the chip
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<mrkiko> Hello to all of you reading my message. I encountered a Banana PI M2+ H3 standard, with h3 allwinner soc I guess. I would like to install a minimal distribution, with no GUI; I was thinking of a Debian derivative or something like that. Any help would be greatly apreciated. I saw that bananian doesn't support this device yet. Any recomendations / suggestions? Thank you very much guys.
<KotCzarny> mrkiko: see armbian
<mrkiko> thank you very much
<mrkiko> KotCzarny: downloading the stretch armbian now;
<mrkiko> KotCzarny: thank you
<KotCzarny> join #armbian for further distro specific questions
<KotCzarny> and see their forum, it's full of information
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<mrkiko> KotCzarny: thank you
<mrkiko> thanks for all, really
<KotCzarny> also, for hardware/kernel specific information about the board see linux-sunxi.org wiki
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<mrkiko> KotCzarny: thank you very much. My last non-so specific distro question is regarding the etcher software... they tell you you can use that software to write the images to the SD cards. may I use dd instead or does etcher use / rely on a specific format? I am still downloading the image. Thank you very much and sorry for the bothering
<KotCzarny> dd is fine if you are sure about your cardwriter/card quality
<KotCzarny> for lesser cards etcher saves some troubleshooting as it verifies writing
<KotCzarny> also dont forget to unpack images if they are packed with xz
<mrkiko> KotCzarny: sure, thank you
<KotCzarny> (for dd, etcher unpacks on the fly afair)
<KotCzarny> and read armbian docs, first boot does some housekeeping
<mrkiko> thank you; it'll ask me to change my password; I am a blind user, so interacting with display and keyboard at first boot won't be easy, so I hope there's some form of ssh, but a friend will be with me so I think we'll get along. Thank you really for the help and patience
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<KotCzarny> default pass is 1234
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<diego71> KotCzarny: funny, it's the same password of my luggage
<KotCzarny> at least in case of software you can easily change it
<mrkiko> KotCzarny: thank you!!
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<willmore> catphish, when you awake, let us know how you solved it.
<KotCzarny> (or better, add the info to wiki)
<willmore> This^^^^
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<catphish> willmore: hey, happy to document what i did :) but essentially nothing more than i said yesterday, i configured the taps such that only a single coefficient was active (at offset 0)
<catphish> the slight antialiasing that was still visible is not a result of the scaling, but something else, i never got to the bottom of it, but the same effect occurs even if i render at full 1080, so it's likely related to the display, not the sunxi
<catphish> i don't know if this procedure would be useful to anyone else, but i'd certainly be happy to document what i learned about how the FE works
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<karlp> a demo app on github would probably be handy enough,
<catphish> i'll tidy this up and publish it soone :)
<catphish> this is the end result https://i.imgur.com/oumvyY5.png - hoping i can have some fun with pixel art now that it works
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<willmore> Thanks, catphish!
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<jaganteki> Hi wens
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<anarsoul|2> jaganteki: just ask your question and check the log later :)
<jaganteki> it was about the ctp patch series, regarding vcc-ctp regulator. since it's a private question.
<jaganteki> I just pinged and waiting.
<jaganteki> anyway I'm writing on the ML, sorry for the noice.
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<catphish> pushed my demo code to github: https://github.com/catphish/a20-lowres/blob/master/display.c it's probably not terribly useful but does a nice job if you happen to want a low res pixel buffer :)
<catphish> i'm looking at how to synchronize frames with the display engine and can't find much information, is there any sync between hdmi, backend and frontend? any way to sync data with frame output?
<mru> there must be
<mru> all display systems can do that
<catphish> i'd think so too, struggling to find it though, the frontend seems to have an interrupt that can be triggered on a certain line, but it's not at all clear to me how that relates to the other layers
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<catphish> i'll look for any interrupts that might be useful
<mru> what are you trying to achieve?
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<catphish> so, i have DE_FE->DE_BE->HDMI, i'd like to write one full frame to the DE_FE for each frame output to the HDMI
<catphish> and do so in such a way that i'm never writing data at the same time as the frontend is reading it
<KotCzarny> ie. vsync
<catphish> i guess a combination of vsync and double buffering
<mru> the line interrupt will fire once per frame
<catphish> that's the one i found too, will that be vsync's all the way down to the hdmi?
<catphish> easy to test :)
<mru> there has to be a constant latency
<mru> the framebuffer base address registers are probably latched at the start of each frame
<mru> so you can likely just set the interrupt to fire on line 0 and update the address in the interrupt handler
<mru> or some other line
<catphish> that sounds ideal, i'll try that, i was thinking that the frontend would just run free and not be sync'd with the backend / hdmi, but hopefully that's not the case
<mru> that wouldn't make much sense
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<catphish> well, thats the only interrupt i can find, so fingers crossed, it's sync's all the way up by the hardware, and i can just swap the frame in on that FE line interrupt
<mru> that's the interrupt that matters even if there are others
<catphish> ideal
<catphish> i can't find any others anyway
<catphish> ugh, i don't even have interrupts set up, off i go :)
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<mrkiko> thanks for all, exiting, sorry
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