diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_mem.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_mem.c | 43 |
1 files changed, 29 insertions, 14 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c index 568bcc21216..a9f36ab256b 100644 --- a/drivers/gpu/drm/nouveau/nouveau_mem.c +++ b/drivers/gpu/drm/nouveau/nouveau_mem.c @@ -341,18 +341,36 @@ nouveau_mem_detect(struct drm_device *dev) return -ENOMEM; } -#if __OS_HAS_AGP -static void nouveau_mem_reset_agp(struct drm_device *dev) +int +nouveau_mem_reset_agp(struct drm_device *dev) { - uint32_t saved_pci_nv_1, saved_pci_nv_19, pmc_enable; +#if __OS_HAS_AGP + uint32_t saved_pci_nv_1, pmc_enable; + int ret; + + /* First of all, disable fast writes, otherwise if it's + * already enabled in the AGP bridge and we disable the card's + * AGP controller we might be locking ourselves out of it. */ + if (dev->agp->acquired) { + struct drm_agp_info info; + struct drm_agp_mode mode; + + ret = drm_agp_info(dev, &info); + if (ret) + return ret; + + mode.mode = info.mode & ~0x10; + ret = drm_agp_enable(dev, mode); + if (ret) + return ret; + } saved_pci_nv_1 = nv_rd32(dev, NV04_PBUS_PCI_NV_1); - saved_pci_nv_19 = nv_rd32(dev, NV04_PBUS_PCI_NV_19); /* clear busmaster bit */ nv_wr32(dev, NV04_PBUS_PCI_NV_1, saved_pci_nv_1 & ~0x4); - /* clear SBA and AGP bits */ - nv_wr32(dev, NV04_PBUS_PCI_NV_19, saved_pci_nv_19 & 0xfffff0ff); + /* disable AGP */ + nv_wr32(dev, NV04_PBUS_PCI_NV_19, 0); /* power cycle pgraph, if enabled */ pmc_enable = nv_rd32(dev, NV03_PMC_ENABLE); @@ -364,11 +382,12 @@ static void nouveau_mem_reset_agp(struct drm_device *dev) } /* and restore (gives effect of resetting AGP) */ - nv_wr32(dev, NV04_PBUS_PCI_NV_19, saved_pci_nv_19); nv_wr32(dev, NV04_PBUS_PCI_NV_1, saved_pci_nv_1); -} #endif + return 0; +} + int nouveau_mem_init_agp(struct drm_device *dev) { @@ -378,11 +397,6 @@ nouveau_mem_init_agp(struct drm_device *dev) struct drm_agp_mode mode; int ret; - if (nouveau_noagp) - return 0; - - nouveau_mem_reset_agp(dev); - if (!dev->agp->acquired) { ret = drm_agp_acquire(dev); if (ret) { @@ -479,7 +493,8 @@ nouveau_mem_init(struct drm_device *dev) /* GART */ #if !defined(__powerpc__) && !defined(__ia64__) - if (drm_device_is_agp(dev) && dev->agp) { + if (drm_device_is_agp(dev) && dev->agp && !nouveau_noagp) { + nouveau_mem_reset_agp(dev); ret = nouveau_mem_init_agp(dev); if (ret) NV_ERROR(dev, "Error initialising AGP: %d\n", ret); |