drm/amd/display: Add dynamic link encoder selection.

[Why]
Some display endpoints may be programmably mapped to compatible link
encoders. The assignment of link encoders to links has to be dynamic to
accommodate the increased flexibility in comparison to conventional
display endpoints.

[How]
- Add link encoder assignment tracking variables.
- Execute link encoder assignment algorithm before enabling link and
release link encoders from links once they are disabled.

Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h
index 80757a0ea7c6..b5e875ee9027 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_types.h
@@ -934,4 +934,19 @@ enum dc_psr_version {
 	DC_PSR_VERSION_UNSUPPORTED		= 0xFFFFFFFF,
 };
 
+/* Possible values of display_endpoint_id.endpoint */
+enum display_endpoint_type {
+	DISPLAY_ENDPOINT_PHY = 0, /* Physical connector. */
+	DISPLAY_ENDPOINT_UNKNOWN = -1
+};
+
+/* Extends graphics_object_id with an additional member 'ep_type' for
+ * distinguishing between physical endpoints (with entries in BIOS connector table) and
+ * logical endpoints.
+ */
+struct display_endpoint_id {
+	struct graphics_object_id link_id;
+	enum display_endpoint_type ep_type;
+};
+
 #endif /* DC_TYPES_H_ */