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
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -5173,6 +5173,43 @@
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 @@
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 @@
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;
+ }
+
}
}