Re: [9front] core-i3 and vesa mode

[kokamoto@hera.eonet.ne.jp]

> I'm now trying to make use of sandy-bridge machine, and
> met annoying one.

My temporal report.

I see scrambled screen, one time moving parallel horizontal color band,
or colored scatterring dotts one.  In any case, I can open terminal, and can commands in it.
I have to guss the mouse point and the shape of rio terminal, though :-)
For example, I can do aux/vga -m igfx -l 1024x768x32 (now 1280x1024x32),
and see the screen was changed.
In addition, I can see a kind of broad shadow of moving mouse, when I move it.

Based on the above observations, I think only the screen is not suitable, just like
a timing error, such as horizontal blank etc.

However I think those values from the port reading are correct, like:
(at 1280x1024x32 resolution)
rmmio 00060000 69704ff 	HTOTAL_A
	69704ff: total size=1687, active size=1279
rmmio 00060004 69704ff	HBLANK_A
	69704ff: horizontal blank end=1687, start=1279
rmmio 000e0008 59f052f	PCH_TRANS_HSYNC_A
	59f052f: hsync end=1439, start=1327
rmmio 000e000c 42903ff 	PCH_TRANS_VTOTAL_A
	42903ff: Vtotal=1065, Vactive size=1023
rmmio 000e0010 42903ff	PCH_TRANS_VBLANK_A
	42903ff: vblank end=1065, start=1023
rmmio 000e0014 4030400	PCH_TRANS_VSYNC_A
	4030400: vsync end=1027, start=1024

If you have some comments, please make me know.

Kenji

----from here------
I made changes like:
1) /sys/src/9/pc/vgaigfx.c
 (1-A) in stolenmb()
	switch(p->did){
	case 0x0166:	/* Ivy Bridge */
	case 0x0102:	/* Core-5 Sandy Bridge */

(1-B) in igfxcurregs()
	case 0x2a42:	/* X200 */
	case 0x2a02:	/* CF-R7 */
	case 0x0102:	/* Core-i5 Sndy Bridge */
		if(pipe > 1)
2) /sys/src/cmd/aux/vga/igfx.c
 (2-A) in snarfpipe()
		/* display port control */
		p->fdi->dpctl = snarfreg(igfx, o + 0x300);	/* TRANS_DP_CTL[AB..]

//		p->fdi->rxctl = snarfreg(igfx, o + 0x1000c);	/* FDI_RX[AB..]_CTL */
		p->fdi->rxctl = snarfreg(igfx, o + 0x1000C);	/* FDI_RX[AB..]_CTL */ <=== here

	/* cursor plane */
	switch(igfx->type){
//	case TypeSNB:		<=== deleted
	case TypeIVB:
		p->cur->cntr	= snarfreg(igfx, 0x70080 + x*0x1000);
		p->cur->base	= snarfreg(igfx, 0x70084 + x*0x1000);
		p->cur->pos	= snarfreg(igfx, 0x70088 + x*0x1000);
		break;
	case TypeSNB:		<==== added
		p->cur->cntr	= snarfreg(igfx, 0x70080 + x*0x40);	/* cursol control */
		p->cur->base	= snarfreg(igfx, 0x70084 + x*0x40);	/* cursol base address */
		p->cur->pos	= snarfreg(igfx, 0x70088 + x*0x40);	/* Cursol Position */
		break;
	case TypeG45:
 (2-B) in devtype()
	switch(igfx->pci->did){
	case 0x0166:	/* 3rd Gen Core - ThinkPad X230 */
		return TypeIVB;
	case 0x0102:	/* Dell Optiplex 790 */  <=== added
	case 0x0126:	/* Thinkpad X220 */
		return TypeSNB;

 (2-C) in inittrans()
	t->vs.v = (m->vre - 1)<<16 | (m->vrs - 1);

	t->hb.v = t->ht.v;
//	t->hb.v = (m->ehb - 1)<<16 | (m->shb - 1);	<=== changed, but no change
	t->vb.v = t->vt.v;

 (2-D) in init()
	switch(port){
	default:
	Badport:
		error("%s: display #%d not supported\n", ctlr->name, port+1);
		break;

	case PortVGA:
		if(igfx->type == TypeG45)	<=== from here
			x = (igfx->adpa.v >> 30) & 1;	/* pipe select o/1 */
		if(igfx->type == TypeSNB || igfx->type == TypeIVB)	/* K.Okamoto */
			x = (igfx->adpa.v >> 29) & 3;	/* transcoder A or B or C */ <==== to here
		igfx->adpa.v |= (1<<31);			/* ADPA enable */
		if(igfx->type == TypeG45){	/* set DPMS VSYNC, HSYNC */
		....
	case PortLCD:
		if(igfx->type == TypeG45)	<=== from here
			x = (igfx->lvds.v >> 30) & 1;	/* pipe select o/1 */
		if(igfx->type == TypeSNB || igfx->type == TypeIVB)
			x = (igfx->lvds.v >> 29) & 3;	/* transcoder A or B or C */	<=== to here
		igfx->lvds.v |= (1<<31);

 (2-E) in enablepipe()
	if(p->fdi->rxctl.a != 0){
			....
		sleep(5);
		p->fdi->txctl.v &= ~(7<<8 | 1);	/* clear auto training bits */
		p->fdi->txctl.v &= ~(1<<31);	/* disable 
		p->fdi->rxctl.v |= (1<<14);	/* enable pll */
//		p->fdi->txctl.v |= (1<<14);	<==== here
		loadreg(igfx, p->fdi->txctl);
		sleep(5);
	}
---- to here--------