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TV Out for the business card? #13
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Dude I almost got Doom running on it as is and I was seriously bummed that I couldn't have an "Of course it runs Doom" section of my write-up. Doom didn't like X11 forwarding... That could work. I need to play with it. Does the TV out peripheral have a Linux driver? |
I’m basically asking you about the driver XD
I hear “they” got it working with another Allwinner on Armbian.
I can’t really figure out if the tool I mentioned is a driver or just a
tool to fix overscan. Haven’t had the time to check out the source yet.
…On Wed, 22 Jan 2020 at 17.14, George Hilliard ***@***.***> wrote:
Dude I *almost* got Doom running on it as is and I was seriously bummed
that I couldn't have an "Of course it runs Doom" section of my write-up.
Doom didn't like X11 forwarding...
That could work. I need to play with it. Does the TV out peripheral have a
Linux driver?
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Ah, gotcha. I will dig and see. Certainly you could put together a demo on the Nano if the driver support is there. |
The first thing I did when I got the Nano was to replace the firmware with
this(didn’t even dump it) so I have no clue.
I bet I can find it and check it out though.
…On Wed, 22 Jan 2020 at 17.29, George Hilliard ***@***.***> wrote:
Ah, gotcha. I will dig and see. Certainly you could put together a demo on
the Nano if the driver support is there.
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https://twitter.com/Claude1079/status/1168167016269848577 some guy on the
internet.
On Wed, Jan 22, 2020 at 11:16 AM AndersBNielsen <notifications@github.com>
wrote:
… The first thing I did when I got the Nano was to replace the firmware with
this(didn’t even dump it) so I have no clue.
I bet I can find it and check it out though.
On Wed, 22 Jan 2020 at 17.29, George Hilliard ***@***.***>
wrote:
> Ah, gotcha. I will dig and see. Certainly you could put together a demo
on
> the Nano if the driver support is there.
>
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Three months late-ish :) But wow - an FPGA seems to defeat the point.
I see in the docs sipeed offers a VGA-adapter so that should work too -
without the FPGA... still a bit more bulky than just TV-out + GND broken
out.
https://github.com/Lichee-Pi/linux
Can you identify if they have a composite driver in there? ^^
On Wed, 22 Jan 2020 at 19.07, sorry-i-am-late <notifications@github.com>
wrote:
… https://twitter.com/Claude1079/status/1168167016269848577 some guy on the
internet.
On Wed, Jan 22, 2020 at 11:16 AM AndersBNielsen ***@***.***>
wrote:
> The first thing I did when I got the Nano was to replace the firmware
with
> this(didn’t even dump it) so I have no clue.
> I bet I can find it and check it out though.
>
> On Wed, 22 Jan 2020 at 17.29, George Hilliard ***@***.***>
> wrote:
>
> > Ah, gotcha. I will dig and see. Certainly you could put together a demo
> on
> > the Nano if the driver support is there.
> >
> > —
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Is this what we’re looking for here?
https://github.com/BPI-SINOVOIP/BPI-M2U-bsp/tree/master/linux-sunxi/drivers/video/sunxi/disp2/tv
Never added a driver to compile with buildroot so I have no idea how :/
…On Wed, 22 Jan 2020 at 19.41, Anders Nielsen ***@***.***> wrote:
Three months late-ish :) But wow - an FPGA seems to defeat the point.
I see in the docs sipeed offers a VGA-adapter so that should work too -
without the FPGA... still a bit more bulky than just TV-out + GND broken
out.
https://github.com/Lichee-Pi/linux
Can you identify if they have a composite driver in there? ^^
On Wed, 22 Jan 2020 at 19.07, sorry-i-am-late ***@***.***>
wrote:
> https://twitter.com/Claude1079/status/1168167016269848577 some guy on the
> internet.
>
> On Wed, Jan 22, 2020 at 11:16 AM AndersBNielsen ***@***.***
> >
> wrote:
>
> > The first thing I did when I got the Nano was to replace the firmware
> with
> > this(didn’t even dump it) so I have no clue.
> > I bet I can find it and check it out though.
> >
> > On Wed, 22 Jan 2020 at 17.29, George Hilliard ***@***.***
> >
> > wrote:
> >
> > > Ah, gotcha. I will dig and see. Certainly you could put together a
> demo
> > on
> > > the Nano if the driver support is there.
> > >
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> > > You are receiving this because you authored the thread.
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That is a driver, but it looks like it is coded against Linux 3.10, so it's unlikely to work with the mainline kernel (the kernel has no stable internal API). There's a driver in the mainline kernel for something graphics related at |
https://github.com/torvalds/linux/blob/master/drivers/gpu/drm/sun4i/sun4i_tv.c This should be it - not sure if it only works for the A10 though. Also - there seems to be "something" in uboot as well. |
It seems the linux-sunxi guys didnt get any graphics working on mainline with F1C100S hmmm... Either way I will solder on an RCA-cable and see what happens. I think I'm stuck for now if dmesg doesn't output anything interesting when I plug it in. |
True, although not much attention is usually paid to the F1C100s (until lately)... If the F1C100s TV peripheral is in the sun4i family, it should be supportable with a small amount of work on the driver. |
Hi George and Anders, |
I sincerely hope so! There is enough CPU to run it for sure. The main obstacle would be ensuring Doom can draw to the framebuffer - I imagine it can, no problem |
Currently I'm still waiting for 4,2" and 5" TFT's(800x480 and 480x272) from Asia - things are always slow this time of year but I suppose this year even more so. SPI flash should be easier - would love to see what you get out of it. In the mean time I tried the stock image to see if I could get a better understanding of the SoC-specific features - I was met with the JEDEC ID bytes issue though, so somebody must've thought it was a great idea to shave a few cents off using the actual Winbond flash, breaking all the stock images in the process. When I have the time I will try the SD card image instead and just maybe the TV-out will work with the old kernel and tell me which drivers it's using and if there are any tricks to it. |
I encountered a branch of @Icenowy's kernel that appeared to support the display peripheral: https://github.com/Icenowy/linux/tree/f1c100s-480272lcd-test As I did not need it for my project, I did not test it. However, I would imagine that that is what your mystery image is compiled from. I don't remember the difference between that branch and the other branch that I worked from (although both commit logs mention LCD things): |
I managed to get chocolate-doom running on the F1C100s :) For the next step I will add some buttons, so I can actually control the game, and a speaker ofcourse. After that maybe ESP8089 for multiplayer :) Do you know if there are working drivers for the keyadc, headphone output or esp8089? |
Awesome! There is an out-of-tree driver for esp8089: https://github.com/al177/esp8089 I don't know about keyadc or headphones, but I'd be willing to bet they're close cousins of the sun4i peripherals. |
I finally got myself a 7" 800x480 LCD and would like to try it out but I'm a little bit over my head with kernel modification. |
In Buildroot, In principle U-Boot supports TFTs, but in practice I doubt they work on the F1C100s because drivers. |
Uboot seems to support TFT's - that's how I verified my tft works. With the stock image(from 2018) it actually gave me a nice little Tux and uboot version. Nothing else though - probably because it can't boot from the off brand flash. I'll see if I can figure out how to get the 5.4 fbtft driver into this build. |
The fbtft drivers are only for small SPI based displays, so it wont work for a parallel RGB display. |
I will try the licheepi nano image on an SD card, since it doesn't boot with my spi flash. Maybe I can at least figure out which driver it is actually using. |
F1C100s & F1C200s Board with LCD and TVout RCA connector Here is a board one could test out several ideas and interfaces of the F1C100s chip. I can't read the Chinese documentation on this TaoBao website, so don't know details to share here. I was looking for a PCB that supported TVout and this seems to fit my needs. I wanted to see if I could play 1/4 VGA (320x240) videos on standard television. What would you do with this board and LCD? Please share your ideas. Fred |
if u wana take a look at my repo i have and 8080 lcd working and audio i was trying to get compisite video working but i desided that i dont have enough knowlage in that department and was going to leave it to others. if people want scematics for how i got the lcd and audio working i will gladly post them i dont exactly understand how video drivers in linux work so i made it in userland by maping the memory. i also got usb working. most of the working demos with composite use melis os or the modified kernel for allwiner chips |
the composite video controller thing has an auto detect feture to detect when a compoite tv is conected i compiled the kernel with the allwinner a10 (i think that one) composite video driver mapped to the memory of the f1c200s's it didnt detect the compostie tv i |
you can also make somthing like this https://olimex.wordpress.com/2012/06/12/low-cost-lcd-to-vga-adapter/ |
Obviously I'm thoroughly addicted to playing Rogue on businesscard-linux by now - not even kidding.
I'm just left with a feeling it's wrong to connect to it with another computer when it technically has the capability to run everything on it's own.
Connecting an LCD requires a minimum of an additional backlight-circuit and LCD-connector which increases the BOM significantly (for a business card) - and for the displays I have lying around it also needs a TFT power supply circuit like the TPS65120.
But what about TV-out/CVBS - isn't that just a matter of breaking out the pins and throwing on an RCA-cable?
Also, what's needed to enable TV-out as a framebuffer device/screen in linux?
I see there's an "Allwinner Composite Configuration Tool" that might make things easier, but I have no idea if it just works out of the box?
"My business card runs Doom" doesn't sound that bad either ;-)
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