drm/nouveau/mxm: initial implementation of dcb sanitisation

The DCB table provided by the VBIOS on most MXM chips has a number of
entries which either need to be disabled, or modified according to the
MXM-SIS Output Device Descriptors.

The x86 vbios code usually takes care of this for us, however, with the
large number of laptops now with switchable graphics or optimus, a lot
of the time nouveau is responsible for POSTing the card instead - leaving
some fun situations like, plugging in a monitor and having nouveau decide
3 connectors actually just got plugged in..

No MXM-SIS fetching methods implemented yet.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h
index fb126c1508b5..891c91b14886 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
@@ -793,6 +793,7 @@ struct drm_nouveau_private {
         struct nouveau_vm *chan_vm;
 
         struct nvbios vbios;
+        u8 *mxms;
         struct list_head i2c_ports;
 
         struct nv04_mode_state mode_reg;
@@ -864,6 +865,7 @@ extern char *nouveau_perflvl;
 extern int nouveau_perflvl_wr;
 extern int nouveau_msi;
 extern int nouveau_ctxfw;
+extern int nouveau_mxmdcb;
 
 extern int nouveau_pci_suspend(struct pci_dev *pdev, pm_message_t pm_state);
 extern int nouveau_pci_resume(struct pci_dev *pdev);
@@ -1108,6 +1110,10 @@ extern int call_lvds_script(struct drm_device *, struct dcb_entry *, int head,
                             enum LVDS_script, int pxclk);
 bool bios_encoder_match(struct dcb_entry *, u32 hash);
 
+/* nouveau_mxm.c */
+int  nouveau_mxm_init(struct drm_device *dev);
+void nouveau_mxm_fini(struct drm_device *dev);
+
 /* nouveau_ttm.c */
 int nouveau_ttm_global_init(struct drm_nouveau_private *);
 void nouveau_ttm_global_release(struct drm_nouveau_private *);