drm/amd/display: Support DAC in dce110_hwseq

The dce110_hwseq is used by all DCE hardware,
so add the DAC support here.

When enabling/disabling a stream for a RGB signal,
this will call the VBIOS to enable/disable the DAC.
Additionally, when applying the controller context,
call SelectCRTC_Source from VBIOS in order to
direct the CRTC output to the DAC.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Timur Kristóf

drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c

@@ -659,6 +659,20 @@ void dce110_update_info_frame(struct pipe_ctx *pipe_ctx)
 	}
 }
 
+static void
+dce110_dac_encoder_control(struct pipe_ctx *pipe_ctx, bool enable)
+{
+	struct dc_link *link = pipe_ctx->stream->link;
+	struct dc_bios *bios = link->ctx->dc_bios;
+	struct bp_encoder_control encoder_control = {0};
+
+	encoder_control.action = enable ? ENCODER_CONTROL_ENABLE : ENCODER_CONTROL_DISABLE;
+	encoder_control.engine_id = link->link_enc->analog_engine;
+	encoder_control.pixel_clock = pipe_ctx->stream->timing.pix_clk_100hz / 10;
+
+	bios->funcs->encoder_control(bios, &encoder_control);
+}
+
 void dce110_enable_stream(struct pipe_ctx *pipe_ctx)
 {
 	enum dc_lane_count lane_count =
@@ -689,6 +703,9 @@ void dce110_enable_stream(struct pipe_ctx *pipe_ctx)
 		early_control = lane_count;
 
 	tg->funcs->set_early_control(tg, early_control);
+
+	if (dc_is_rgb_signal(pipe_ctx->stream->signal))
+		dce110_dac_encoder_control(pipe_ctx, true);
 }
 
 static enum bp_result link_transmitter_control(
@@ -1176,7 +1193,8 @@ void dce110_disable_stream(struct pipe_ctx *pipe_ctx)
 		pipe_ctx->stream_res.stream_enc->funcs->stop_dp_info_packets(
 			pipe_ctx->stream_res.stream_enc);
 
-	dc->hwss.disable_audio_stream(pipe_ctx);
+	if (!dc_is_rgb_signal(pipe_ctx->stream->signal))
+		dc->hwss.disable_audio_stream(pipe_ctx);
 
 	link_hwss->reset_stream_encoder(pipe_ctx);
 
@@ -1196,6 +1214,9 @@ void dce110_disable_stream(struct pipe_ctx *pipe_ctx)
 		dccg->funcs->disable_symclk_se(dccg, stream_enc->stream_enc_inst,
 					       link_enc->transmitter - TRANSMITTER_UNIPHY_A);
 	}
+
+	if (dc_is_rgb_signal(pipe_ctx->stream->signal))
+		dce110_dac_encoder_control(pipe_ctx, false);
 }
 
 void dce110_unblank_stream(struct pipe_ctx *pipe_ctx,
@@ -1581,6 +1602,51 @@ static enum dc_status dce110_enable_stream_timing(
 	return DC_OK;
 }
 
+static void
+dce110_select_crtc_source(struct pipe_ctx *pipe_ctx)
+{
+	struct dc_link *link = pipe_ctx->stream->link;
+	struct dc_bios *bios = link->ctx->dc_bios;
+	struct bp_crtc_source_select crtc_source_select = {0};
+	enum engine_id engine_id = link->link_enc->preferred_engine;
+	uint8_t bit_depth;
+
+	if (dc_is_rgb_signal(pipe_ctx->stream->signal))
+		engine_id = link->link_enc->analog_engine;
+
+	switch (pipe_ctx->stream->timing.display_color_depth) {
+	case COLOR_DEPTH_UNDEFINED:
+		bit_depth = 0;
+		break;
+	case COLOR_DEPTH_666:
+		bit_depth = 6;
+		break;
+	default:
+	case COLOR_DEPTH_888:
+		bit_depth = 8;
+		break;
+	case COLOR_DEPTH_101010:
+		bit_depth = 10;
+		break;
+	case COLOR_DEPTH_121212:
+		bit_depth = 12;
+		break;
+	case COLOR_DEPTH_141414:
+		bit_depth = 14;
+		break;
+	case COLOR_DEPTH_161616:
+		bit_depth = 16;
+		break;
+	}
+
+	crtc_source_select.controller_id = CONTROLLER_ID_D0 + pipe_ctx->stream_res.tg->inst;
+	crtc_source_select.bit_depth = bit_depth;
+	crtc_source_select.engine_id = engine_id;
+	crtc_source_select.sink_signal = pipe_ctx->stream->signal;
+
+	bios->funcs->select_crtc_source(bios, &crtc_source_select);
+}
+
 enum dc_status dce110_apply_single_controller_ctx_to_hw(
 		struct pipe_ctx *pipe_ctx,
 		struct dc_state *context,
@@ -1600,6 +1666,10 @@ enum dc_status dce110_apply_single_controller_ctx_to_hw(
 		hws->funcs.disable_stream_gating(dc, pipe_ctx);
 	}
 
+	if (pipe_ctx->stream->signal == SIGNAL_TYPE_RGB) {
+		dce110_select_crtc_source(pipe_ctx);
+	}
+
 	if (pipe_ctx->stream_res.audio != NULL) {
 		struct audio_output audio_output = {0};
 
@@ -1679,7 +1749,8 @@ enum dc_status dce110_apply_single_controller_ctx_to_hw(
 		pipe_ctx->stream_res.tg->funcs->set_static_screen_control(
 				pipe_ctx->stream_res.tg, event_triggers, 2);
 
-	if (!dc_is_virtual_signal(pipe_ctx->stream->signal))
+	if (!dc_is_virtual_signal(pipe_ctx->stream->signal) &&
+		!dc_is_rgb_signal(pipe_ctx->stream->signal))
 		pipe_ctx->stream_res.stream_enc->funcs->dig_connect_to_otg(
 			pipe_ctx->stream_res.stream_enc,
 			pipe_ctx->stream_res.tg->inst);