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Direct Video no longer syncs to my CRT with latest version 20220517 #605

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chr0m opened this issue May 18, 2022 · 17 comments
Closed

Direct Video no longer syncs to my CRT with latest version 20220517 #605

chr0m opened this issue May 18, 2022 · 17 comments

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@chr0m
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chr0m commented May 18, 2022

I updated to 20220517 and my CRT no longer syncs via direct video

It works if I go back to the previous version 20220511
@paulb-nl
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@sorgelig It works with Pixel repetition set to b00 Auto instead of b10. I guess the Directvideo resolution of the Menu core is too low (640x240) for the HDMI chip so it needs the repetition.

Main_MiSTer/video.cpp

Lines 957 to 958 in a37231a

0x3B, 0b01000000, // Pixel repetition [6:5] b00 AUTO. [4:3] b00 x1 mult of input clock. [2:1] b00 x1 pixel rep to send to HDMI Rx.
// Pixel repetition set to manual to avoid VIC auto detection as defined in ADV7513 Programming Guide

@wickerwaka
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Good catch. Minimum HDMI dot clock is 25Mhz.

@sorgelig
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interesting, as all cores (at least i've tweaked for direct video) use video clock >25MHz.

@sorgelig
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Thanks for finding it out!

@chr0m
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chr0m commented May 19, 2022 •
edited

Thanks for figuring this out!

Happy to test if someone wants to shoot me a binary

@birdybro
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birdybro commented May 19, 2022 •
edited

https://github.com/MiSTer-unstable-nightlies/Main_MiSTer/releases/download/unstable-builds/MiSTer_unstable_20220518_20ff6d

Rename the MiSTer file in the root of your sdcard (or if over network like samba/ftp, then in /media/fat) to something else, copy this over and rename it to MiSTer. Wait 10 seconds, then reboot.

@chr0m
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chr0m commented May 19, 2022

@birdybro Thanks. It works!

@chr0m chr0m closed this as completed May 19, 2022
@paulb-nl
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I suggest to enable Pixel repetition with Directvideo in the Menu core only because the pixel repetition is the reason why Vsync must be aligned to HSync start with Directvideo & composite_sync=1.

There are some cores which don't work with Directvideo and composite sync such as Atari ST(just fixed), Tatung Einstein, Armstrad, Coco3. These cores all work fine with Directvideo if pixel repetition is disabled.

Changing these cores to align Vsync to HSync is sometimes difficult because some can output interlaced and it takes time. So it seems better to fix it in here in Main.

@misteraddons
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misteraddons commented May 22, 2022 via email

@ArchiveRL ArchiveRL mentioned this issue May 22, 2022
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@paulb-nl
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Do you mean on the analog output? The Sync 480i to HDMI is to prevent the scaler with vsync_adjust=2 to lose sync during 240p/480i transitions. It should not be enabled if you use the analog output.

@birdybro
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Exactly, maybe that's the source of this users problem. But it should only effect 480i video.

@misteraddons
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misteraddons commented May 22, 2022 via email

@chr0m
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chr0m commented May 23, 2022 •
edited

The Sync 480i to HDMI is to prevent the scaler with vsync_adjust=2 to lose sync during 240p/480i transitions. It should not be enabled if you use the analog output.

Hmmm, if I don't enable it PSX doesn't sync for me

Check out the FMV on Tekken 3, and Gran Turismo 1 and 2. Sync is broken without the “sync 480i to HDMI” option.

Yep, that's what I get

@paulb-nl
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You should create an issue in the PSX repo for that. I am seeing the same behavior with a Ugreen DAC but not with another one. The PSX core also has some crazy sync issues with Directvideo in general if I connect the DACs to a HDMI splitter which works fine with all other cores.

@chr0m
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chr0m commented May 23, 2022 •
edited

You should create an issue in the PSX repo for that. I am seeing the same behavior with a Ugreen DAC but not with another one. The PSX core also has some crazy sync issues with Directvideo in general if I connect the DACs to a HDMI splitter which works fine with all other cores.

Which ugreen one? I have both :) I got one and it had issues with some other cores. Mainly the Atari consoles and Commodore 16. I got a different ugreen and it seems perfect on every core. The Tendak seemed to work on everything except PSX (with or without the 480i HDMI sync) It didn't seem to like 480i at all. I tried it in the Genesis 240p test suite.

I have a HDMI to VGA cable where PSX breaks when I plug it into a splitter, but strangely plugging it into the splitter fixes bouncing image issues I had on some other cores :)

My perfect combo now is https://www.ugreen.com/products/hdmi-to-vga-adapter-with-audio-jack?_pos=3&_sid=f2e327390&_ss=r combined with https://etim.net.au/shop/shop.php?crn=220&rn=582&action=show_detail

It still requires "Sync 480i for HDMI" on for Tekken 3 FMV though

All of the other HDMI to VGA adapters I tried had issues with at least one core

@misteraddons
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misteraddons commented May 23, 2022 via email

@birdybro
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The only direct video issue I'm aware of that is the fault of the core and not the template/Main is with the SMS core's border issue --> MiSTer-devel/SMS_MiSTer#120

So yes, the Main_MiSTer or Template_MiSTer repos are the appropriate places to raise issues regarding direct video not working.

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@sorgelig @paulb-nl @wickerwaka @chr0m @birdybro @misteraddons