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-rw-r--r--drivers/video/nvidia/nvidia.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/video/nvidia/nvidia.c b/drivers/video/nvidia/nvidia.c
index 96d51144094..691151e2bce 100644
--- a/drivers/video/nvidia/nvidia.c
+++ b/drivers/video/nvidia/nvidia.c
@@ -411,6 +411,7 @@ MODULE_DEVICE_TABLE(pci, nvidiafb_pci_tbl);
/* command line data, set in nvidiafb_setup() */
static int flatpanel __devinitdata = -1; /* Autodetect later */
+static int fpdither __devinitdata = -1;
static int forceCRTC __devinitdata = -1;
static int hwcur __devinitdata = 0;
static int noaccel __devinitdata = 0;
@@ -1026,10 +1027,19 @@ static int nvidiafb_set_par(struct fb_info *info)
NVTRACE_ENTER();
NVLockUnlock(par, 1);
- if (!par->FlatPanel || (info->var.bits_per_pixel != 24) ||
- !par->twoHeads)
+ if (!par->FlatPanel || !par->twoHeads)
par->FPDither = 0;
+ if (par->FPDither < 0) {
+ if ((par->Chipset & 0x0ff0) == 0x0110)
+ par->FPDither = !!(NV_RD32(par->PRAMDAC, 0x0528)
+ & 0x00010000);
+ else
+ par->FPDither = !!(NV_RD32(par->PRAMDAC, 0x083C) & 1);
+ printk(KERN_INFO PFX "Flat panel dithering %s\n",
+ par->FPDither ? "enabled" : "disabled");
+ }
+
info->fix.visual = (info->var.bits_per_pixel == 8) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
@@ -1548,9 +1558,9 @@ static int __devinit nvidiafb_probe(struct pci_dev *pd,
sprintf(nvidiafb_fix.id, "NV%x", (pd->device & 0x0ff0) >> 4);
par->FlatPanel = flatpanel;
-
if (flatpanel == 1)
printk(KERN_INFO PFX "flatpanel support enabled\n");
+ par->FPDither = fpdither;
par->CRTCnumber = forceCRTC;
par->FpScale = (!noscale);
@@ -1729,6 +1739,8 @@ static int __devinit nvidiafb_setup(char *options)
} else if (!strncmp(this_opt, "nomtrr", 6)) {
nomtrr = 1;
#endif
+ } else if (!strncmp(this_opt, "fpdither:", 9)) {
+ fpdither = simple_strtol(this_opt+9, NULL, 0);
} else
mode_option = this_opt;
}
@@ -1775,7 +1787,11 @@ module_exit(nvidiafb_exit);
module_param(flatpanel, int, 0);
MODULE_PARM_DESC(flatpanel,
"Enables experimental flat panel support for some chipsets. "
- "(0 or 1=enabled) (default=0)");
+ "(0=disabled, 1=enabled, -1=autodetect) (default=-1)");
+module_param(fpdither, int, 0);
+MODULE_PARM_DESC(fpdither,
+ "Enables dithering of flat panel for 6 bits panels. "
+ "(0=disabled, 1=enabled, -1=autodetect) (default=-1)");
module_param(hwcur, int, 0);
MODULE_PARM_DESC(hwcur,
"Enables hardware cursor implementation. (0 or 1=enabled) "