drm/amd/display: Add new infopacket definition

Modify freesync module to build VTEM infopackets when in HdmiVRR mode
Signed-off-by: NBayan Zabihiyan <Bayan.Zabihiyan@amd.com>
Reviewed-by: NJun Lei <Jun.Lei@amd.com>
Acked-by: NLeo Li <sunpeng.li@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -461,6 +461,26 @@ bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync,
 	return false;
 }
 
+static void build_vrr_infopacket_header_vtem(enum signal_type signal,
+		struct dc_info_packet *infopacket)
+{
+	// HEADER
+
+	// HB0, HB1, HB2 indicates PacketType VTEMPacket
+	infopacket->hb0 = 0x7F;
+	infopacket->hb1 = 0xC0;
+	infopacket->hb2 = 0x00;
+	/* HB3 Bit Fields
+	 * Reserved :1 = 0
+	 * Sync     :1 = 0
+	 * VFR      :1 = 1
+	 * Ds_Type  :2 = 0
+	 * End      :1 = 0
+	 * New      :1 = 0
+	 */
+	infopacket->hb3 = 0x20;
+}
+
 static void build_vrr_infopacket_header_v1(enum signal_type signal,
 		struct dc_info_packet *infopacket,
 		unsigned int *payload_size)
@@ -559,6 +579,54 @@ static void build_vrr_infopacket_header_v2(enum signal_type signal,
 	}
 }
 
+static void build_vrr_vtem_infopacket_data(const struct dc_stream_state *stream,
+		const struct mod_vrr_params *vrr,
+		struct dc_info_packet *infopacket)
+{
+	/* dc_info_packet to VtemPacket Translation of Bit-fields,
+	 * SB[6]
+	 * unsigned char VRR_EN        :1
+	 * unsigned char M_CONST       :1
+	 * unsigned char Reserved2     :2
+	 * unsigned char FVA_Factor_M1 :4
+	 * SB[7]
+	 * unsigned char Base_Vfront   :8
+	 * SB[8]
+	 * unsigned char Base_Refresh_Rate_98 :2
+	 * unsigned char RB                   :1
+	 * unsigned char Reserved3            :5
+	 * SB[9]
+	 * unsigned char Base_RefreshRate_07  :8
+	 */
+	unsigned int fieldRateInHz;
+
+	if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
+				vrr->state == VRR_STATE_ACTIVE_FIXED){
+		infopacket->sb[6] |= 0x80; //VRR_EN Bit = 1
+	} else {
+		infopacket->sb[6] &= 0x7F; //VRR_EN Bit = 0
+	}
+
+	if (!stream->timing.vic) {
+		infopacket->sb[7] = stream->timing.v_front_porch;
+
+		/* TODO: In dal2, we check mode flags for a reduced blanking timing.
+		 * Need a way to relay that information to this function.
+		 * if("ReducedBlanking")
+		 * {
+		 *   infopacket->sb[8] |= 0x20; //Set 3rd bit to 1
+		 * }
+		 */
+		fieldRateInHz = (stream->timing.pix_clk_100hz * 100)/
+				(stream->timing.h_total * stream->timing.v_total);
+
+		infopacket->sb[8] |= ((fieldRateInHz & 0x300) >> 2);
+		infopacket->sb[9] |= fieldRateInHz & 0xFF;
+
+	}
+	infopacket->valid = true;
+}
+
 static void build_vrr_infopacket_data(const struct mod_vrr_params *vrr,
 		struct dc_info_packet *infopacket)
 {
@@ -672,6 +740,19 @@ static void build_vrr_infopacket_v2(enum signal_type signal,
 	infopacket->valid = true;
 }
 
+static void build_vrr_infopacket_vtem(const struct dc_stream_state *stream,
+		const struct mod_vrr_params *vrr,
+		struct dc_info_packet *infopacket)
+{
+	//VTEM info packet for HdmiVrr
+
+	//VTEM Packet is structured differently
+	build_vrr_infopacket_header_vtem(stream->signal, infopacket);
+	build_vrr_vtem_infopacket_data(stream, vrr, 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,
@@ -679,18 +760,21 @@ void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
 		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,
+	/* SPD info packet for FreeSync
+	 * VTEM info packet for HdmiVRR
+	 * Check if Freesync is supported. Return if false. If true,
 	 * set the corresponding bit in the info packet
 	 */
-	if (!vrr->supported || !vrr->send_vsif)
+	if (!vrr->supported || (!vrr->send_info_frame && packet_type != PACKET_TYPE_VTEM))
 		return;
 
 	switch (packet_type) {
 	case PACKET_TYPE_FS2:
 		build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket);
 		break;
+	case PACKET_TYPE_VTEM:
+		build_vrr_infopacket_vtem(stream, vrr, infopacket);
+		break;
 	case PACKET_TYPE_VRR:
 	case PACKET_TYPE_FS1:
 	default:
@@ -739,7 +823,7 @@ void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
 		return;
 
 	in_out_vrr->state = in_config->state;
-	in_out_vrr->send_vsif = in_config->vsif_supported;
+	in_out_vrr->send_info_frame = in_config->vsif_supported;
 
 	if (in_config->state == VRR_STATE_UNSUPPORTED) {
 		in_out_vrr->state = VRR_STATE_UNSUPPORTED;

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

@@ -104,7 +104,7 @@ struct mod_vrr_params_fixed_refresh {
 
 struct mod_vrr_params {
 	bool supported;
-	bool send_vsif;
+	bool send_info_frame;
 	enum mod_vrr_state state;
 
 	uint32_t min_refresh_in_uhz;

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

@@ -41,7 +41,8 @@ enum color_transfer_func {
 enum vrr_packet_type {
 	PACKET_TYPE_VRR,
 	PACKET_TYPE_FS1,
-	PACKET_TYPE_FS2
+	PACKET_TYPE_FS2,
+	PACKET_TYPE_VTEM
 };