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发表于 2020-12-20 17:59 · 广西
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Calamity
Reply #53 on: Today at 04:08:31 am »
http://forum.arcadecontrols.com/index.php/topic,159988.40.html
最下部。
I have an important update on this topic: interlaced is confirmed to be supported by this hardware, it's just disabled in the drivers.
I managed to enable interlace support on Linux (amdgpu driver) for this specific hardware (DCN 1), through a kernel patch. Thanks to Substring for educating me on kernel modification.
After this modification, this board can do any low dotclock mode through its VGA connector, both progressive and interlace.
I doubt an equivalent patch can be ported to the Windows drivers, because it's not a trivial hack. So anyone using this hardware should consider Linux definitely.
My understanding is this same patch should work on the 3400G. Newer APUs will need a different patch.
There are still some issues, like tearing on stretching, probably related to amdgpu drivers, that will need further investigation.
I've attached the patch for kernel 5.9.9. |
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