This patch has been merged by Ben yesterday.

http://cgit.freedesktop.org/~darktama/nouveau/commit/?id=8c713f90a63ffca10d122af09d439f3409c933ed

Why do you send a new version ? Is the previous patch wrong?

On 09/30/2015 01:48 PM, Ondrej Zary wrote:
SiS 761 chipset does not support AGP cards but has AGP capability (for
the onboard video). At least PC Chips A31G board using this chipset has
an AGP-like AGPro slot that's wired to the PCI bus. Enabling AGP will
fail (GPU lockup and software fbcon, X11 hangs).

Add support for matching just the host bridge in nvkm_device_agp_quirks
and add entry for SiS 761 with mode 0 (AGP disabled).

Signed-off-by: Ondrej Zary <li...@rainbow-software.org>
---
  drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c |    8 ++++++--
  1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c 
b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c
index 814cb51..385a90f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c
@@ -35,6 +35,8 @@ static const struct nvkm_device_agp_quirk
  nvkm_device_agp_quirks[] = {
        /* VIA Apollo PRO133x / GeForce FX 5600 Ultra - fdo#20341 */
        { PCI_VENDOR_ID_VIA, 0x0691, PCI_VENDOR_ID_NVIDIA, 0x0311, 2 },
+       /* SiS 761 does not support AGP cards, use PCI mode */
+       { PCI_VENDOR_ID_SI, 0x0761, PCI_ANY_ID, PCI_ANY_ID, 0 },
        {},
  };
@@ -137,8 +139,10 @@ nvkm_agp_ctor(struct nvkm_pci *pci)
        while (quirk->hostbridge_vendor) {
                if (info.device->vendor == quirk->hostbridge_vendor &&
                    info.device->device == quirk->hostbridge_device &&
-                   pci->pdev->vendor == quirk->chip_vendor &&
-                   pci->pdev->device == quirk->chip_device) {
+                   (quirk->chip_vendor == (u16)PCI_ANY_ID ||
+                   pci->pdev->vendor == quirk->chip_vendor) &&
+                   (quirk->chip_device == (u16)PCI_ANY_ID ||
+                   pci->pdev->device == quirk->chip_device)) {
                        nvkm_info(subdev, "forcing default agp mode to %dX, "
                                          "use NvAGP=<mode> to override\n",
                                  quirk->mode);

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