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Subject:  Re: [9front] core-i5(TypeSNB) and vesa mode
Date: Sat, 30 Jul 2016 08:41:50 +0900
From: kokamoto@hera.eonet.ne.jp
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> FDI is the backbone for everything. your analog DACs (vga) and external display
> port connectors are on the PCH (north) side. the FDI is the connection from the
> cpu (north) side to the PCH.

After your suggestion,  "Is it really crt timing related?".
I researched my old 965 machine's log for 1680x01050x32 mode, though
that machine corrupted, and found it had also 146400000Htz for 146250000Hrz.
Although its value is the same value as the present i5 machine, it worked fine.
So, you are right.   My facing problem does not come from another reason.
Ok, I'll have just a rest (yes, much tired), and try your suggestion 
on the initialization process itself.

> I would guess that the reason for DP not working has todo with your code
> overriding DREF_CONTROL register. Some debugging in the display port link
> training code might give some hints whats going on. Do you get edid from
> displayport aux channel?

Yes, in the vesa mode, but not igfx mode.
for vesa mode like below:
....
vesa mode           0x160 848x480x8 m8 packed
vesa mode           0x161 848x480x16 r5g6b5 direct
vesa mode           0x162 848x480x32 x8r8g8b8 direct
vesa mode           0x165 1280x1024x32 x8r8g8b8 direct
vesa mode           0x168 1440x900x32 x8r8g8b8 direct
vesa mode           0x107 1280x1024x8 m8 packed
vesa mode           0x11a 1280x1024x16 r5g6b5 direct
vesa mode           0x11b 1280x1024x32 x8r8g8b8 direct
vesa mode           0x105 1024x768x8 m8 packed
vesa mode           0x117 1024x768x16 r5g6b5 direct
vesa mode           0x118 1024x768x32 x8r8g8b8 direct
vesa mode           0x112 640x480x32 x8r8g8b8 direct
vesa mode           0x114 800x600x16 r5g6b5 direct
vesa mode           0x115 800x600x32 x8r8g8b8 direct
vesa mode           0x101 640x480x8 m8 packed
vesa mode           0x103 800x600x8 m8 packed
vesa mode           0x111 640x480x16 r5g6b5 direct
vesa mode           0x17d 1920x1080x8 m8 packed (unoffered)
vesa mode           0x17e 1920x1080x16 r5g6b5 direct (unoffered)
vesa mode           0x17f 1920x1080x32 x8r8g8b8 direct (unoffered)
edid mfr            SHP
edid serialstr      
edid name           SHARP HDMI
edid product        4256
edid serial         0
edid version        1.3
edid mfrdate        2012.255
edid size (cm)      89x50
edid gamma          2.20
edid vert (Hz)      23-76
edid horz (Hz)      15000-68000
edid pclkmax        150000000
edid flags           digital activeoff
edid 1360x768@60Hz  
		clock=85.5
		shb=1424 ehb=1536 ht=1792
		vrs=771 vre=777 vt=795
		hsync=+ vsync=+ 
edid 1920x1080@60Hz 
		clock=148.5
		shb=2008 ehb=2052 ht=2200
		vrs=1084 vre=1089 vt=1125
		hsync=+ vsync=+ 
	....

Kenji