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[PATCH] Patch for nvidia divide by zero error for 7600 pci-express card

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The following patch resolves the divide by zero error I encountered on my
system:

	http://marc.10east.com/?l=linux-fbdev-devel&m=116058257024413&w=2

I accomplished this by merging what I thought was appropriate from:

	http://webcvs.freedesktop.org/xorg/driver/xf86-video-nv/src/

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Wink Saville 2006-11-10 12:27:52 -08:00 committed by Linus Torvalds
parent 7947d2cc2c
commit e40c67597e
4 changed files with 39 additions and 16 deletions
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12
drivers/video/nvidia/nv_hw.c
View file

@ -145,12 +145,18 @@ static void nvGetClocks(struct nvidia_par *par, unsigned int *MClk,
if (par->Architecture >= NV_ARCH_40) {
pll = NV_RD32(par->PMC, 0x4020);
P = (pll >> 16) & 0x03;
P = (pll >> 16) & 0x07;
pll = NV_RD32(par->PMC, 0x4024);
M = pll & 0xFF;
N = (pll >> 8) & 0xFF;
MB = (pll >> 16) & 0xFF;
NB = (pll >> 24) & 0xFF;
if (((par->Chipset & 0xfff0) == 0x0290) ||
((par->Chipset & 0xfff0) == 0x0390)) {
MB = 1;
NB = 1;
} else {
MB = (pll >> 16) & 0xFF;
NB = (pll >> 24) & 0xFF;
}
*MClk = ((N * NB * par->CrystalFreqKHz) / (M * MB)) >> P;
pll = NV_RD32(par->PMC, 0x4000);

18
drivers/video/nvidia/nv_setup.c
View file

@ -359,6 +359,7 @@ int NVCommonSetup(struct fb_info *info)
case 0x0186:
case 0x0187:
case 0x018D:
case 0x0228:
case 0x0286:
case 0x028C:
case 0x0316:
@ -382,6 +383,10 @@ int NVCommonSetup(struct fb_info *info)
case 0x034C:
case 0x0160:
case 0x0166:
case 0x0169:
case 0x016B:
case 0x016C:
case 0x016D:
case 0x00C8:
case 0x00CC:
case 0x0144:
@ -639,12 +644,23 @@ int NVCommonSetup(struct fb_info *info)
par->fpHeight = NV_RD32(par->PRAMDAC, 0x0800) + 1;
par->fpSyncs = NV_RD32(par->PRAMDAC, 0x0848) & 0x30000033;
printk("Panel size is %i x %i\n", par->fpWidth, par->fpHeight);
printk("nvidiafb: Panel size is %i x %i\n", par->fpWidth, par->fpHeight);
}
if (monA)
info->monspecs = *monA;
if (!par->FlatPanel || !par->twoHeads)
par->FPDither = 0;
par->LVDS = 0;
if (par->FlatPanel && par->twoHeads) {
NV_WR32(par->PRAMDAC0, 0x08B0, 0x00010004);
if (par->PRAMDAC0[0x08b4] & 1)
par->LVDS = 1;
printk("nvidiafb: Panel is %s\n", par->LVDS ? "LVDS" : "TMDS");
}
kfree(edidA);
kfree(edidB);
done:

1
drivers/video/nvidia/nv_type.h
View file

@ -129,6 +129,7 @@ struct nvidia_par {
int fpHeight;
int PanelTweak;
int paneltweak;
int LVDS;
int pm_state;
u32 crtcSync_read;
u32 fpSyncs;

24
drivers/video/nvidia/nvidia.c
View file

@ -1160,20 +1160,20 @@ static u32 __devinit nvidia_get_arch(struct fb_info *info)
case 0x0340: /* GeForceFX 5700 */
arch = NV_ARCH_30;
break;
case 0x0040:
case 0x00C0:
case 0x0120:
case 0x0040: /* GeForce 6800 */
case 0x00C0: /* GeForce 6800 */
case 0x0120: /* GeForce 6800 */
case 0x0130:
case 0x0140:
case 0x0160:
case 0x01D0:
case 0x0090:
case 0x0210:
case 0x0220:
case 0x0140: /* GeForce 6600 */
case 0x0160: /* GeForce 6200 */
case 0x01D0: /* GeForce 7200, 7300, 7400 */
case 0x0090: /* GeForce 7800 */
case 0x0210: /* GeForce 6800 */
case 0x0220: /* GeForce 6200 */
case 0x0230:
case 0x0240:
case 0x0290:
case 0x0390:
case 0x0240: /* GeForce 6100 */
case 0x0290: /* GeForce 7900 */
case 0x0390: /* GeForce 7600 */
arch = NV_ARCH_40;
break;
case 0x0020: /* TNT, TNT2 */