drm/amd/display: Add support for USB4 on C20 PHY for DCN3.1

[Why]
Created new fields that matches new B0 structs On DCN31 the mapping of
DIO output to PHY differs from A0 to B0 boards with new PHY C20 & this
new mapping needed to be handled.

[How]
Mapped new structure based on new structs Added logic for mapping over
A0 and B0 boards Hooked all new structs together.

Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Ahmad Othman <Ahmad.Othman@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link.c

@@ -3874,6 +3874,9 @@ static void update_psp_stream_config(struct pipe_ctx *pipe_ctx, bool dpms_off)
 	struct cp_psp *cp_psp = &pipe_ctx->stream->ctx->cp_psp;
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	struct link_encoder *link_enc = NULL;
+	struct dc_state *state = pipe_ctx->stream->ctx->dc->current_state;
+	struct link_enc_assignment link_enc_assign;
+	int i;
 #endif
 
 	if (cp_psp && cp_psp->funcs.update_stream_config) {
@@ -3887,9 +3890,57 @@ static void update_psp_stream_config(struct pipe_ctx *pipe_ctx, bool dpms_off)
 		config.dig_be = pipe_ctx->stream->link->link_enc_hw_inst;
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 		config.stream_enc_idx = pipe_ctx->stream_res.stream_enc->id - ENGINE_ID_DIGA;
-		if (pipe_ctx->stream->link->ep_type == DISPLAY_ENDPOINT_PHY) {
+
+		if (pipe_ctx->stream->link->ep_type == DISPLAY_ENDPOINT_PHY ||
+				pipe_ctx->stream->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) {
 			link_enc = pipe_ctx->stream->link->link_enc;
+			config.dio_output_type = pipe_ctx->stream->link->ep_type;
+			config.dio_output_idx = link_enc->transmitter - TRANSMITTER_UNIPHY_A;
+			// Initialize PHY ID with ABCDE - 01234 mapping except when it is B0
 			config.phy_idx = link_enc->transmitter - TRANSMITTER_UNIPHY_A;
+
+			//look up the link_enc_assignment for the current pipe_ctx
+			for (i = 0; i < state->stream_count; i++) {
+				if (pipe_ctx->stream == state->streams[i]) {
+					link_enc_assign = state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i];
+				}
+			}
+
+			if (pipe_ctx->stream->ctx->dc->enable_c20_dtm_b0)
+				config.dig_be = link_enc_assign.eng_id;
+
+			// Add RegKey to guard B0 implementation
+			if (pipe_ctx->stream->ctx->dc->enable_c20_dtm_b0 && link_enc->ctx->asic_id.hw_internal_rev == YELLOW_CARP_B0) {
+				if (pipe_ctx->stream->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) {
+					link_enc = pipe_ctx->stream->link->link_enc;
+
+					// enum ID 1-4 maps to DPIA PHY ID 0-3
+					config.phy_idx = link_enc_assign.ep_id.link_id.enum_id - ENUM_ID_1;
+				} else {  // for non DPIA mode over B0, ABCDE maps to 01564
+
+					switch (link_enc->transmitter) {
+					case TRANSMITTER_UNIPHY_A:
+						config.phy_idx = 0;
+						break;
+					case TRANSMITTER_UNIPHY_B:
+						config.phy_idx = 1;
+						break;
+					case TRANSMITTER_UNIPHY_C:
+						config.phy_idx = 5;
+						break;
+					case TRANSMITTER_UNIPHY_D:
+						config.phy_idx = 6;
+						break;
+					case TRANSMITTER_UNIPHY_E:
+						config.phy_idx = 4;
+						break;
+					default:
+						config.phy_idx = 0;
+						break;
+					}
+
+				}
+			}
 		} else if (pipe_ctx->stream->link->dc->res_pool->funcs->link_encs_assign) {
 			link_enc = link_enc_cfg_get_link_enc_used_by_stream(
 					pipe_ctx->stream->ctx->dc,

drivers/gpu/drm/amd/display/dc/dc.h

@@ -211,12 +211,12 @@ struct dc_dcc_setting {
 	unsigned int max_uncompressed_blk_size;
 	bool independent_64b_blks;
 #if defined(CONFIG_DRM_AMD_DC_DCN)
-	//These bitfields to be used starting with DCN 3.0
+	//These bitfields to be used starting with DCN
 	struct {
-		uint32_t dcc_256_64_64 : 1;//available in ASICs before DCN 3.0 (the worst compression case)
-		uint32_t dcc_128_128_uncontrained : 1;  //available in ASICs before DCN 3.0
-		uint32_t dcc_256_128_128 : 1;		//available starting with DCN 3.0
-		uint32_t dcc_256_256_unconstrained : 1;  //available in ASICs before DCN 3.0 (the best compression case)
+		uint32_t dcc_256_64_64 : 1;//available in ASICs before DCN (the worst compression case)
+		uint32_t dcc_128_128_uncontrained : 1;  //available in ASICs before DCN
+		uint32_t dcc_256_128_128 : 1;		//available starting with DCN
+		uint32_t dcc_256_256_unconstrained : 1;  //available in ASICs before DCN (the best compression case)
 	} dcc_controls;
 #endif
 };
@@ -731,6 +731,9 @@ struct dc {
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	bool idle_optimizations_allowed;
 #endif
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	bool enable_c20_dtm_b0;
+#endif
 
 	/* Require to maintain clocks and bandwidth for UEFI enabled HW */
 

drivers/gpu/drm/amd/display/dc/dm_cp_psp.h

@@ -35,6 +35,8 @@ struct cp_psp_stream_config {
 	uint8_t link_enc_idx;
 	uint8_t stream_enc_idx;
 	uint8_t phy_idx;
+	uint8_t dio_output_idx;
+	uint8_t dio_output_type;
 	uint8_t assr_enabled;
 	uint8_t mst_enabled;
 	uint8_t dp2_enabled;

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

@@ -249,6 +249,8 @@ struct mod_hdcp_link {
 	uint8_t ddc_line;
 	uint8_t link_enc_idx;
 	uint8_t phy_idx;
+	uint8_t dio_output_type;
+	uint8_t dio_output_id;
 	uint8_t hdcp_supported_informational;
 	union {
 		struct mod_hdcp_displayport dp;