1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h
new file mode 100644
index 000000000000..f79e4a4a9db6
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2022 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DC_LINK_DP_CAPABILITY_H__
+#define __DC_LINK_DP_CAPABILITY_H__
+
+#include "link.h"
+
+bool detect_dp_sink_caps(struct dc_link *link);
+
+void detect_edp_sink_caps(struct dc_link *link);
+
+struct dc_link_settings dp_get_max_link_cap(struct dc_link *link);
+
+
+enum dc_status dp_retrieve_lttpr_cap(struct dc_link *link);
+
+/* Convert PHY repeater count read from DPCD uint8_t. */
+uint8_t dp_parse_lttpr_repeater_count(uint8_t lttpr_repeater_count);
+
+bool dp_is_lttpr_present(struct dc_link *link);
+
+bool is_dp_active_dongle(const struct dc_link *link);
+
+bool is_dp_branch_device(const struct dc_link *link);
+
+void dpcd_write_cable_id_to_dprx(struct dc_link *link);
+
+/* Initialize output parameter lt_settings. */
+void dp_decide_training_settings(
+	struct dc_link *link,
+	const struct dc_link_settings *link_setting,
+	struct link_training_settings *lt_settings);
+
+
+bool decide_edp_link_settings_with_dsc(struct dc_link *link,
+		struct dc_link_settings *link_setting,
+		uint32_t req_bw,
+		enum dc_link_rate max_link_rate);
+
+void dpcd_set_source_specific_data(struct dc_link *link);
+
+/*query dpcd for version and mst cap addresses*/
+bool read_is_mst_supported(struct dc_link *link);
+
+bool decide_fallback_link_setting(
+		struct dc_link *link,
+		struct dc_link_settings *max,
+		struct dc_link_settings *cur,
+		enum link_training_result training_result);
+
+bool dp_verify_link_cap_with_retries(
+	struct dc_link *link,
+	struct dc_link_settings *known_limit_link_setting,
+	int attempts);
+
+#endif /* __DC_LINK_DP_CAPABILITY_H__ */