drm/amd/display: Add color bit info to freesync infoframe

Parse the native color bit and send it to freesync module for future
use

Signed-off-by: SivapiriyanKumarasamy <sivapiriyan.kumarasamy@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -4797,6 +4797,8 @@ void set_freesync_on_stream(struct amdgpu_display_manager *dm,
 	mod_freesync_build_vrr_infopacket(dm->freesync_module,
 					  new_stream,
 					  &vrr,
+					  packet_type_fs1,
+					  NULL,
 					  &vrr_infopacket);
 
 	new_crtc_state->adjust = vrr.adjust;

drivers/gpu/drm/amd/display/modules/freesync/freesync.c

@@ -480,22 +480,11 @@ bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync,
 	return false;
 }
 
-void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
-		const struct dc_stream_state *stream,
-		const struct mod_vrr_params *vrr,
-		struct dc_info_packet *infopacket)
+static void build_vrr_infopacket_header_v1(enum signal_type signal,
+		struct dc_info_packet *infopacket,
+		unsigned int *payload_size)
 {
-	/* SPD info packet for FreeSync */
-	unsigned char checksum = 0;
-	unsigned int idx, payload_size = 0;
-
-	/* Check if Freesync is supported. Return if false. If true,
-	 * set the corresponding bit in the info packet
-	 */
-	if (!vrr->supported || !vrr->send_vsif)
-		return;
-
-	if (dc_is_hdmi_signal(stream->signal)) {
+	if (dc_is_hdmi_signal(signal)) {
 
 		/* HEADER */
 
@@ -510,9 +499,9 @@ void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
 		/* HB2  = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x08] */
 		infopacket->hb2 = 0x08;
 
-		payload_size = 0x08;
+		*payload_size = 0x08;
 
-	} else if (dc_is_dp_signal(stream->signal)) {
+	} else if (dc_is_dp_signal(signal)) {
 
 		/* HEADER */
 
@@ -536,9 +525,62 @@ void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
 		 */
 		infopacket->hb3 = 0x04;
 
-		payload_size = 0x1B;
+		*payload_size = 0x1B;
 	}
+}
+
+static void build_vrr_infopacket_header_v2(enum signal_type signal,
+		struct dc_info_packet *infopacket,
+		unsigned int *payload_size)
+{
+	if (dc_is_hdmi_signal(signal)) {
+
+		/* HEADER */
+
+		/* HB0  = Packet Type = 0x83 (Source Product
+		 *	  Descriptor InfoFrame)
+		 */
+		infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
+
+		/* HB1  = Version = 0x02 */
+		infopacket->hb1 = 0x02;
+
+		/* HB2  = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x09] */
+		infopacket->hb2 = 0x09;
+
+		*payload_size = 0x0A;
 
+	} else if (dc_is_dp_signal(signal)) {
+
+		/* HEADER */
+
+		/* HB0  = Secondary-data Packet ID = 0 - Only non-zero
+		 *	  when used to associate audio related info packets
+		 */
+		infopacket->hb0 = 0x00;
+
+		/* HB1  = Packet Type = 0x83 (Source Product
+		 *	  Descriptor InfoFrame)
+		 */
+		infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
+
+		/* HB2  = [Bits 7:0 = Least significant eight bits -
+		 *	  For INFOFRAME, the value must be 1Bh]
+		 */
+		infopacket->hb2 = 0x1B;
+
+		/* HB3  = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2]
+		 *	  [Bits 1:0 = Most significant two bits = 0x00]
+		 */
+		infopacket->hb3 = 0x08;
+
+		*payload_size = 0x1B;
+	}
+}
+
+static void build_vrr_infopacket_data(const struct mod_vrr_params *vrr,
+		struct dc_info_packet *infopacket)
+{
 	/* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */
 	infopacket->sb[1] = 0x1A;
 
@@ -576,15 +618,39 @@ void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
 	 */
 	infopacket->sb[8] = (unsigned char)(vrr->max_refresh_in_uhz / 1000000);
 
-	/* PB9 - PB27  = Reserved */
 
+	//FreeSync HDR
+	infopacket->sb[9] = 0;
+	infopacket->sb[10] = 0;
+}
+
+static void build_vrr_infopacket_fs2_data(enum color_transfer_func app_tf,
+		struct dc_info_packet *infopacket)
+{
+	if (app_tf != transfer_func_unknown) {
+		infopacket->valid = true;
+
+		infopacket->sb[6] |= 0x08;  // PB6 = [Bit 3 = Native Color Active]
+
+		if (app_tf == transfer_func_gamma_22) {
+			infopacket->sb[9] |= 0x04;  // PB6 = [Bit 2 = Gamma 2.2 EOTF Active]
+		}
+	}
+}
+
+static void build_vrr_infopacket_checksum(unsigned int *payload_size,
+		struct dc_info_packet *infopacket)
+{
 	/* Calculate checksum */
+	unsigned int idx = 0;
+	unsigned char checksum = 0;
+
 	checksum += infopacket->hb0;
 	checksum += infopacket->hb1;
 	checksum += infopacket->hb2;
 	checksum += infopacket->hb3;
 
-	for (idx = 1; idx <= payload_size; idx++)
+	for (idx = 1; idx <= *payload_size; idx++)
 		checksum += infopacket->sb[idx];
 
 	/* PB0 = Checksum (one byte complement) */
@@ -593,6 +659,64 @@ void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
 	infopacket->valid = true;
 }
 
+static void build_vrr_infopacket_v1(enum signal_type signal,
+		const struct mod_vrr_params *vrr,
+		struct dc_info_packet *infopacket)
+{
+	/* SPD info packet for FreeSync */
+	unsigned int payload_size = 0;
+
+	build_vrr_infopacket_header_v1(signal, infopacket, &payload_size);
+	build_vrr_infopacket_data(vrr, infopacket);
+	build_vrr_infopacket_checksum(&payload_size, infopacket);
+
+	infopacket->valid = true;
+}
+
+static void build_vrr_infopacket_v2(enum signal_type signal,
+		const struct mod_vrr_params *vrr,
+		const enum color_transfer_func *app_tf,
+		struct dc_info_packet *infopacket)
+{
+	unsigned int payload_size = 0;
+
+	build_vrr_infopacket_header_v2(signal, infopacket, &payload_size);
+	build_vrr_infopacket_data(vrr, infopacket);
+
+	if (app_tf != NULL)
+		build_vrr_infopacket_fs2_data(*app_tf, infopacket);
+
+	build_vrr_infopacket_checksum(&payload_size, infopacket);
+
+	infopacket->valid = true;
+}
+
+void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
+		const struct dc_stream_state *stream,
+		const struct mod_vrr_params *vrr,
+		enum vrr_packet_type packet_type,
+		const enum color_transfer_func *app_tf,
+		struct dc_info_packet *infopacket)
+{
+	/* SPD info packet for FreeSync */
+
+	/* Check if Freesync is supported. Return if false. If true,
+	 * set the corresponding bit in the info packet
+	 */
+	if (!vrr->supported || !vrr->send_vsif)
+		return;
+
+	switch (packet_type) {
+	case packet_type_fs2:
+		build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket);
+		break;
+	case packet_type_vrr:
+	case packet_type_fs1:
+	default:
+		build_vrr_infopacket_v1(stream->signal, vrr, infopacket);
+	}
+}
+
 void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
 		const struct dc_stream_state *stream,
 		struct mod_freesync_config *in_config,

drivers/gpu/drm/amd/display/modules/inc/mod_freesync.h

@@ -54,7 +54,7 @@
 #ifndef MOD_FREESYNC_H_
 #define MOD_FREESYNC_H_
 
-#include "dm_services.h"
+#include "mod_shared.h"
 
 // Access structures
 struct mod_freesync {
@@ -144,6 +144,8 @@ void mod_freesync_get_settings(struct mod_freesync *mod_freesync,
 void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
 		const struct dc_stream_state *stream,
 		const struct mod_vrr_params *vrr,
+		enum vrr_packet_type packet_type,
+		const enum color_transfer_func *app_tf,
 		struct dc_info_packet *infopacket);
 
 void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,

drivers/gpu/drm/amd/display/modules/inc/mod_shared.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2016 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 MOD_SHARED_H_
+#define MOD_SHARED_H_
+
+enum color_transfer_func {
+	transfer_func_unknown,
+	transfer_func_srgb,
+	transfer_func_bt709,
+	transfer_func_pq2084,
+	transfer_func_pq2084_interim,
+	transfer_func_linear_0_1,
+	transfer_func_linear_0_125,
+	transfer_func_dolbyvision,
+	transfer_func_gamma_22,
+	transfer_func_gamma_26
+};
+
+enum vrr_packet_type {
+	packet_type_vrr,
+	packet_type_fs1,
+	packet_type_fs2
+};
+
+#endif /* MOD_SHARED_H_ */