diff options
| author | Romano <unobe@cpan.org> | 2023-04-09 06:31:09 +0000 |
|---|---|---|
| committer | qwx <qwx@sciops.net> | 2023-04-09 06:31:09 +0000 |
| commit | 101b3c2724779fcb0e503ae274abd7b751a3a48f (patch) | |
| tree | 3d0651a32925618ca4f7afb99ba5d7f8758ed443 /sys/src/cmd/aux/vga/vesa.c | |
| parent | 83b569cbc7e772ec454f87ccd71104b23faebbc8 (diff) | |
DP 1.2 on igfx; EDID wrapping; VGA display connections
This patch more fully implements the training patterns for DP 1.2 per the spec,
which then allows more monitors to successfully train and therefore connect. In
my case it was an LG 34UM68-P.
Secondly, this fixes EDID shifting to work with a wider range of values, notably
ones which wrap.
Lastly, a small correction in vesa.c as to which bits are used to determine
available connections.
Diffstat (limited to 'sys/src/cmd/aux/vga/vesa.c')
| -rw-r--r-- | sys/src/cmd/aux/vga/vesa.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/cmd/aux/vga/vesa.c b/sys/src/cmd/aux/vga/vesa.c index 9b7165e31..5d8d5db86 100644 --- a/sys/src/cmd/aux/vga/vesa.c +++ b/sys/src/cmd/aux/vga/vesa.c @@ -638,7 +638,7 @@ vbesnarf(Vbe *vbe, Vga *vga) u.bx = 0x200; if(vbecall(vbe, &u) < 0) u.cx = 0; - dspcon = u.cx >> 8; /* CH = connected, CL = available? */ + dspcon = (u.cx >> 8) & 0xf; /* detect active display devices */ vbesetup(vbe, &u, 0x5F64); |