Thomas Sowell badc9953e7 Support setting sync polarity (#553) ...

Include sync polarities in the UIO_SET_VIDEO command.  Polarities are
specified in the high bits of the hsync and vsync values.  0 is
negative, 1 is positive.

Horizontal and vertical polarities can optionally be included as two
numbers at the end of custom modes.  Again, 0 is negative, 1 is
positive.

2022-02-26 14:26:51 +08:00

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