shithub: patch

ref: c2103276d324781df709f39564f54da596f302d8
dir: /igfx-pineview/

diff 2a6e03968b9227e91b2df181fe8461d719395359 uncommitted
--- a//sys/src/cmd/aux/vga/igfx.c
+++ b//sys/src/cmd/aux/vga/igfx.c
@@ -176,6 +176,7 @@
 
 	/* G45 */
 	Reg	gmbus[6];	/* GMBUSx */
+	int ispnv;
 
 	Reg	sdvoc;
 	Reg	sdvob;
@@ -389,7 +390,10 @@
 	case 0x0102:	/* Dell Optiplex 790 */
 	case 0x0126:	/* Thinkpad X220 */
 		return TypeSNB;
+	case 0xa001:    /* PineView Graphics */
 	case 0xa011:    /* PineView Graphics */
+		igfx->ispnv = 1;
+		/* wet floor */
 	case 0x27ae:	/* Intel 945GME */
 	case 0x27a2:	/* GM945/82940GML - ThinkPad X60 Tablet */
 	case 0x29a2:	/* 82P965/G965 HECI desktop */
@@ -733,17 +737,21 @@
 
 	best = -1;
 	for(N=3; N<=8; N++)
-	for(M2=5; M2<=9; M2++)
+	//for(M2=5; M2<=9; M2++)
+	for(M2=0; M2<=254; M2++)
 //	for(M1=10; M1<=20; M1++){
-	for(M1=12; M1<=22; M1++){
+	//for(M1=12; M1<=22; M1++){
+	for(M1=0; M1<=0; M1++){
 		M = 5*(M1+2) + (M2+2);
-		if(M < 79 || M > 127)
+		//if(M < 79 || M > 127)
 //		if(M < 70 || M > 120)
+		if(M < 2 || M > 256)
 			continue;
 		for(P1=1; P1<=8; P1++){
 			P = P1 * P2;
-			if(P < 5 || P > 98)
+			//if(P < 5 || P > 98)
 //			if(P < 4 || P > 98)
+			if(P < 7 || P > 112)
 				continue;
 			a = cref;
 			a *= M;
@@ -871,8 +879,10 @@
 		 * preconfigured by the BIOS.
 		 */
 		if(freq > 112*MHz || (igfx->lvds.v>>4 & 3) == 3){
-			p2 >>= 1;
-			dpll->ctrl.v |= (1<<24);
+			if(!igfx->ispnv){	// FIXME: check DPLLB_LVDS_P2_CLOCK_DIV_7
+				p2 >>= 1;
+				dpll->ctrl.v |= (1<<24);
+			}
 		}
 		if(genpll(freq, cref, p2, &m1, &m2, &n, &p1) < 0)
 			return -1;
@@ -917,7 +927,7 @@
 	/* FP1 P1 Post divisor */
 	if(igfx->pci->did != 0x27a2 && igfx->pci->did != 0x2592){
 		dpll->ctrl.v &= ~0xFF;
-		dpll->ctrl.v |=  0x01<<(p1-1);
+		dpll->ctrl.v |=  0x01<<(p1-1);	// FIXME: post_div different for pnv?
 		dpll->fp1.v = dpll->fp0.v;
 	}