drm/nouveau/mxm: handle DCB 4.1 modification

Allows MXM DCB modification to be handled on GM20x and newer boards.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/nv50.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/nv50.c
index db14fad..d4ecc43 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/nv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/nv50.c
@@ -190,7 +190,7 @@ mxm_dcb_sanitise(struct nvkm_mxm *mxm)
        struct nvkm_bios *bios = subdev->device->bios;
        u8  ver, hdr, cnt, len;
        u16 dcb = dcb_table(bios, &ver, &hdr, &cnt, &len);
-       if (dcb == 0x0000 || ver != 0x40) {
+       if (dcb == 0x0000 || (ver != 0x40 && ver != 0x41)) {
                nvkm_debug(subdev, "unsupported DCB version\n");
                return;
        }