drm/amd/display: Enable Stereo in Dal3

- program infoframe for Stereo
- program stereo flip control registers properly

v2: Add missing license headers

Signed-off-by: Alvin lee <alvin.lee3@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 92 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/modules/info_packet/info_packet.c b/drivers/gpu/drm/amd/display/modules/info_packet/info_packet.c
new file mode 100644
index 000000000000..24b6cc1dfc64
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/modules/info_packet/info_packet.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2018 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 "mod_info_packet.h"
+#include "core_types.h"
+
+static void mod_build_vsc_infopacket(const struct dc_stream_state *stream,
+		struct dc_info_packet *info_packet)
+{
+	unsigned int vscPacketRevision = 0;
+	unsigned int i;
+
+	if (stream->timing.timing_3d_format != TIMING_3D_FORMAT_NONE && stream->view_format != VIEW_3D_FORMAT_NONE)
+		vscPacketRevision = 1;
+
+
+	/*VSC packet set to 2 when DP revision >= 1.2*/
+	if (stream->psr_version != 0)
+		vscPacketRevision = 2;
+
+
+	/* VSC packet not needed based on the features
+	 * supported by this DP display
+	 */
+	if (vscPacketRevision == 0)
+		return;
+
+	if (vscPacketRevision == 0x2) {
+		/* Secondary-data Packet ID = 0*/
+		info_packet->hb0 = 0x00;
+		/* 07h - Packet Type Value indicating Video
+		 * Stream Configuration packet
+		 */
+		info_packet->hb1 = 0x07;
+		/* 02h = VSC SDP supporting 3D stereo and PSR
+		 * (applies to eDP v1.3 or higher).
+		 */
+		info_packet->hb2 = 0x02;
+		/* 08h = VSC packet supporting 3D stereo + PSR
+		 * (HB2 = 02h).
+		 */
+		info_packet->hb3 = 0x08;
+
+		for (i = 0; i < 28; i++)
+			info_packet->sb[i] = 0;
+
+		info_packet->valid = true;
+	}
+
+	if (vscPacketRevision == 0x1) {
+
+		info_packet->hb0 = 0x00;	// Secondary-data Packet ID = 0
+		info_packet->hb1 = 0x07;	// 07h = Packet Type Value indicating Video Stream Configuration packet
+		info_packet->hb2 = 0x01;	// 01h = Revision number. VSC SDP supporting 3D stereo only
+		info_packet->hb3 = 0x01;	// 01h = VSC SDP supporting 3D stereo only (HB2 = 01h).
+
+		if (stream->timing.timing_3d_format == TIMING_3D_FORMAT_INBAND_FA)
+			info_packet->sb[0] = 0x1;
+
+		info_packet->valid = true;
+	}
+}
+
+void mod_build_infopackets(struct info_packet_inputs *inputs,
+		struct info_packets *info_packets)
+{
+	if (info_packets->pVscInfoPacket != NULL)
+		mod_build_vsc_infopacket(inputs->pStream, info_packets->pVscInfoPacket);
+}
+