drm/nouveau: check for known dcb connector types

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

diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index ea690a7..8dd97b2 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -5173,6 +5173,43 @@ nouveau_bios_connector_entry(struct drm_device *dev, int index)
        return cte;
 }
 
+static enum dcb_connector_type
+divine_connector_type(struct nvbios *bios, int index)
+{
+       struct dcb_table *dcb = &bios->dcb;
+       unsigned encoders = 0, type = DCB_CONNECTOR_NONE;
+       int i;
+
+       for (i = 0; i < dcb->entries; i++) {
+               if (dcb->entry[i].connector == index)
+                       encoders |= (1 << dcb->entry[i].type);
+       }
+
+       if (encoders & (1 << OUTPUT_DP)) {
+               if (encoders & (1 << OUTPUT_TMDS))
+                       type = DCB_CONNECTOR_DP;
+               else
+                       type = DCB_CONNECTOR_eDP;
+       } else
+       if (encoders & (1 << OUTPUT_TMDS)) {
+               if (encoders & (1 << OUTPUT_ANALOG))
+                       type = DCB_CONNECTOR_DVI_I;
+               else
+                       type = DCB_CONNECTOR_DVI_D;
+       } else
+       if (encoders & (1 << OUTPUT_ANALOG)) {
+               type = DCB_CONNECTOR_VGA;
+       } else
+       if (encoders & (1 << OUTPUT_LVDS)) {
+               type = DCB_CONNECTOR_LVDS;
+       } else
+       if (encoders & (1 << OUTPUT_TV)) {
+               type = DCB_CONNECTOR_TV_0;
+       }
+
+       return type;
+}
+
 static void
 parse_dcb_connector_table(struct nvbios *bios)
 {
@@ -5205,6 +5242,7 @@ parse_dcb_connector_table(struct nvbios *bios)
                        cte->entry = ROM16(entry[0]);
                else
                        cte->entry = ROM32(entry[0]);
+
                cte->type  = (cte->entry & 0x000000ff) >> 0;
                cte->index = (cte->entry & 0x00000f00) >> 8;
                switch (cte->entry & 0x00033000) {
@@ -5230,6 +5268,29 @@ parse_dcb_connector_table(struct nvbios *bios)
 
                NV_INFO(dev, "  %d: 0x%08x: type 0x%02x idx %d tag 0x%02x\n",
                        i, cte->entry, cte->type, cte->index, cte->gpio_tag);
+
+               /* check for known types, fallback to guessing the type
+                * from attached encoders if we hit an unknown.
+                */
+               switch (cte->type) {
+               case DCB_CONNECTOR_VGA:
+               case DCB_CONNECTOR_TV_0:
+               case DCB_CONNECTOR_TV_1:
+               case DCB_CONNECTOR_TV_3:
+               case DCB_CONNECTOR_DVI_I:
+               case DCB_CONNECTOR_DVI_D:
+               case DCB_CONNECTOR_LVDS:
+               case DCB_CONNECTOR_DP:
+               case DCB_CONNECTOR_eDP:
+               case DCB_CONNECTOR_HDMI_0:
+               case DCB_CONNECTOR_HDMI_1:
+                       break;
+               default:
+                       cte->type = divine_connector_type(bios, cte->index);
+                       NV_WARN(dev, "unknown type, using 0x%02x", cte->type);
+                       break;
+               }
+
        }
 }
 

diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.h b/drivers/gpu/drm/nouveau/nouveau_bios.h
index e3163f1..9f688aa 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_bios.h
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.h
@@ -68,6 +68,7 @@ enum dcb_connector_type {
        DCB_CONNECTOR_eDP = 0x47,
        DCB_CONNECTOR_HDMI_0 = 0x60,
        DCB_CONNECTOR_HDMI_1 = 0x61,
+       DCB_CONNECTOR_NONE = 0xff
 };
 
 struct dcb_connector_table_entry {