drm/amd/display: Add Freesync HDMI support to DMCU

[Why]
Adding support for Freesync HDMI to DC and DMCU

[How]
Create DC interface and implementation on top of DMCU to support
parsing CEA blocks in DMCU.

Signed-off-by: Stylon Wang <stylon.wang@amd.com>
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dc_edid_parser.c b/drivers/gpu/drm/amd/display/dc/dc_edid_parser.c
new file mode 100644
index 000000000000..0db5b49e9d5e
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dc_edid_parser.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2021 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
+ *
+ */
+
+#include "dce/dce_dmcu.h"
+#include "dc_edid_parser.h"
+
+bool dc_edid_parser_send_cea(struct dc *dc,
+		int offset,
+		int total_length,
+		uint8_t *data,
+		int length)
+{
+	struct dmcu *dmcu = dc->res_pool->dmcu;
+
+	if (dmcu &&
+	    dmcu->funcs->is_dmcu_initialized(dmcu) &&
+	    dmcu->funcs->send_edid_cea) {
+		return dmcu->funcs->send_edid_cea(dmcu,
+				offset,
+				total_length,
+				data,
+				length);
+	}
+
+	return false;
+}
+
+bool dc_edid_parser_recv_cea_ack(struct dc *dc, int *offset)
+{
+	struct dmcu *dmcu = dc->res_pool->dmcu;
+
+	if (dmcu &&
+	    dmcu->funcs->is_dmcu_initialized(dmcu) &&
+	    dmcu->funcs->recv_edid_cea_ack) {
+		return dmcu->funcs->recv_edid_cea_ack(dmcu, offset);
+	}
+
+	return false;
+}
+
+bool dc_edid_parser_recv_amd_vsdb(struct dc *dc,
+		int *version,
+		int *min_frame_rate,
+		int *max_frame_rate)
+{
+	struct dmcu *dmcu = dc->res_pool->dmcu;
+
+	if (dmcu &&
+	    dmcu->funcs->is_dmcu_initialized(dmcu) &&
+	    dmcu->funcs->recv_amd_vsdb) {
+		return dmcu->funcs->recv_amd_vsdb(dmcu,
+				version,
+				min_frame_rate,
+				max_frame_rate);
+	}
+
+	return false;
+}