drm/nouveau: Add module parameter to override the default AGP rate.
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index a885cd0..02aa9d2 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -430,6 +430,16 @@
if (dev_priv->chipset == 0x18)
mode &= ~PCI_AGP_COMMAND_FW;
+ /*
+ * AGP mode set in the command line.
+ */
+ if (nouveau_agpmode > 0) {
+ bool agpv3 = mode & 0x8;
+ int rate = agpv3 ? nouveau_agpmode / 4 : nouveau_agpmode;
+
+ mode = (mode & ~0x7) | (rate & 0x7);
+ }
+
return mode;
}
#endif
@@ -613,7 +623,7 @@
dev_priv->gart_info.type = NOUVEAU_GART_NONE;
#if !defined(__powerpc__) && !defined(__ia64__)
- if (drm_device_is_agp(dev) && dev->agp && !nouveau_noagp) {
+ if (drm_device_is_agp(dev) && dev->agp && nouveau_agpmode) {
ret = nouveau_mem_init_agp(dev);
if (ret)
NV_ERROR(dev, "Error initialising AGP: %d\n", ret);