1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream_priv.h b/drivers/gpu/drm/amd/display/dc/dc_stream_priv.h
new file mode 100644
index 000000000000..ca37eac20986
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream_priv.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2023 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_STREAM_PRIV_H_
+#define _DC_STREAM_PRIV_H_
+
+#include "dc_stream.h"
+
+bool dc_stream_construct(struct dc_stream_state *stream,
+	struct dc_sink *dc_sink_data);
+void dc_stream_destruct(struct dc_stream_state *stream);
+
+void dc_stream_assign_stream_id(struct dc_stream_state *stream);
+
+/*
+ * Finds the highest refresh rate that can be achieved
+ * from starting_freq while staying within flicker criteria
+ */
+int dc_stream_calculate_max_flickerless_refresh_rate(struct dc_stream_state *stream,
+						      int starting_refresh_hz,
+						      bool is_gaming);
+
+/*
+ * Finds the lowest refresh rate that can be achieved
+ * from starting_freq while staying within flicker criteria
+ */
+int dc_stream_calculate_min_flickerless_refresh_rate(struct dc_stream_state *stream,
+						      int starting_refresh_hz,
+						      bool is_gaming);
+
+/*
+ * Determines if there will be a flicker when moving between 2 refresh rates
+ */
+bool dc_stream_is_refresh_rate_range_flickerless(struct dc_stream_state *stream,
+						  int hz1,
+						  int hz2,
+						  bool is_gaming);
+
+/*
+ * Determines the max instant vtotal delta increase that can be applied without
+ * flickering for a given stream
+ */
+unsigned int dc_stream_get_max_flickerless_instant_vtotal_decrease(struct dc_stream_state *stream,
+									  bool is_gaming);
+
+/*
+ * Determines the max instant vtotal delta decrease that can be applied without
+ * flickering for a given stream
+ */
+unsigned int dc_stream_get_max_flickerless_instant_vtotal_increase(struct dc_stream_state *stream,
+									  bool is_gaming);
+
+#endif // _DC_STREAM_PRIV_H_