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ramapcsx2 / gbs-control

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Clockgen preventing 'Force PAL 50hz to 60hz' at 1080p preset #250

Open TimbleThimble opened 3 years ago

TimbleThimble commented 3 years ago

So cutting #155 and #237 as short as possible, I (and these other people) are having issues when trying to use PAL 50hz output forced to 60hz specifically at 1920x1080.

For me, it works fine when forcing PAL 60hz on 1280x1024 but not with 1920x1080 because (from what I can gather the clockgen is preventing it.) Display choice isn't the issue. I can display 1280x1024 50hz perfectly.

When the clockgen is involved, setting it to 1080p with force 60 toggled-on resets the clockgen during the process at the wrong frequency or atleast to my understanding. That is what I believe it is doing in the screenshots provided. (I have also passed through my GBS to the OSSC to show the display data)

1 Before Soft-Reset

Soft-resetting will then allow it to work at the correct 60hz, but with the trade-off of it no longer recognizing the clock-gen which causes other issues.

2 After Soft-Reset

Power-resetting will put it back to 50hz, even if the toggle is still on, even if a preset has been made, no matter what it will go back to 50hz.

3 After Hard-Reset

I hope this doesn't sound too much like complaining but like the OP of #237 it's a bit annoying trying to find a solution other than 'buy a display that works with 50hz.' Furthermore, I'm not sure if this is something that could even be fixed in the CFW. If it is needed to elaborate further I am happy to help.

EDIT: This is the very latest firmware.

ramapcsx2 commented 3 years ago

Coders: Look for "GBS_OPTION_PALFORCED60_ENABLED" throughout the gbscontrol.ino file for all the references. It probably doesn't have code for calculating a 60Hz timing... Thinking about it, that will be quite hard to do, too ><

TimbleThimble commented 3 years ago

I wish I could help more in the coding aspect but having this properly working would be a big benefit to me personally who plays a lot of PAL PS2 games.

Just to add, I hope this isn't bordering on feature request but even with forced pal 60hz 1080p (image below excluding clock-gen) the image is initially too tall to properly fit the 1080p frame without adjusting any of the scaling options. (Shown below)

Screenshot 2021-07-12 21-40-50

I figure there is a reason for this (pardon my ignorance), more-so just curious as to why this is and what to do. I'm fine with using the scaling options but then I'm unsure/worried about maintaining proper geometry/shapes being correct, on par to the 1280x1024 preset and I'm not sure how to scale properly to keep that proper shape.