[PATCH] drm/amd/display: Print type if we get wrong ObjectID from bios

[Harry Wentland]

We've seen a bunch of issues where we can't get the connector from vbios
for what we think should be a valid connector id. Print some more info
when this happens.

Change-Id: I96aee657ed4632fbc0ab313671da356dc225c8c4
Signed-off-by: Harry Wentland <harry.wentland at amd.com>
---

Hi Shawn,

mind trying this patch? It won't fix anything but should give us a bit
more info on why you're getting this invalid connector ObjectId.

Harry

 drivers/gpu/drm/amd/display/dc/bios/bios_parser.c | 13 ++++++++++---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c     |  5 +++--
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c
index aaaebd06d7ee..065f855fd39c 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c
@@ -190,6 +190,7 @@ static struct graphics_object_id bios_parser_get_connector_id(
 	struct bios_parser *bp = BP_FROM_DCB(dcb);
 	struct graphics_object_id object_id = dal_graphics_object_id_init(
 		0, ENUM_ID_UNKNOWN, OBJECT_TYPE_UNKNOWN);
+	uint16_t id;
 
 	uint32_t connector_table_offset = bp->object_info_tbl_offset
 		+ le16_to_cpu(bp->object_info_tbl.v1_1->usConnectorObjectTableOffset);
@@ -197,12 +198,18 @@ static struct graphics_object_id bios_parser_get_connector_id(
 	ATOM_OBJECT_TABLE *tbl =
 		GET_IMAGE(ATOM_OBJECT_TABLE, connector_table_offset);
 
-	if (tbl && tbl->ucNumberOfObjects > i) {
-		const uint16_t id = le16_to_cpu(tbl->asObjects[i].usObjectID);
+	if (!tbl) {
+		dm_error("Can't get connector table from atom bios.\n");
+		return object_id;
+	}
 
-		object_id = object_id_from_bios_object_id(id);
+	if (tbl->ucNumberOfObjects > i) {
+		dm_error("Can't find connector id %d in connector table of size %d.\n",
+			 i, tbl->ucNumberOfObjects);
 	}
 
+	id = le16_to_cpu(tbl->asObjects[i].usObjectID);
+	object_id = object_id_from_bios_object_id(id);
 	return object_id;
 }
 
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 7b0e43c0685c..80fc02671e0e 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -938,8 +938,9 @@ static bool construct(
 	link->link_id = bios->funcs->get_connector_id(bios, init_params->connector_index);
 
 	if (link->link_id.type != OBJECT_TYPE_CONNECTOR) {
-		dm_error("%s: Invalid Connector ObjectID from Adapter Service for connector index:%d!\n",
-				__func__, init_params->connector_index);
+		dm_error("%s: Invalid Connector ObjectID from Adapter Service for connector index:%d! type %d expected %d\n",
+			 __func__, init_params->connector_index,
+			 link->link_id.type, OBJECT_TYPE_CONNECTOR);
 		goto create_fail;
 	}
 
-- 
2.14.1