drm/amd/display: Update HPO I/O When Handling Link Retrain Automation Request

[WHY]
Previous multi-display HPO fix moved where HPO I/O enable/disable is performed.
The codepath now taken to enable/disable HPO I/O is not used for compliance
test automation, meaning that if a compliance box being driven at a DP1 rate
requests retrain at UHBR, HPO I/O will remain off if it was previously off.

[HOW]
Explicitly update HPO I/O after allocating encoders for test request.
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -5303,3 +5303,16 @@ int resource_calculate_det_for_stream(struct dc_state *state, struct pipe_ctx *o
 	}
 	return det_segments;
 }
+
+bool resource_is_hpo_acquired(struct dc_state *context)
+{
+	int i;
+
+	for (i = 0; i < MAX_HPO_DP2_ENCODERS; i++) {
+		if (context->res_ctx.is_hpo_dp_stream_enc_acquired[i]) {
+			return true;
+		}
+	}
+
+	return false;
+}

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

@@ -2350,19 +2350,6 @@ static void dce110_setup_audio_dto(
 	}
 }
 
-static bool dce110_is_hpo_enabled(struct dc_state *context)
-{
-	int i;
-
-	for (i = 0; i < MAX_HPO_DP2_ENCODERS; i++) {
-		if (context->res_ctx.is_hpo_dp_stream_enc_acquired[i]) {
-			return true;
-		}
-	}
-
-	return false;
-}
-
 enum dc_status dce110_apply_ctx_to_hw(
 		struct dc *dc,
 		struct dc_state *context)
@@ -2371,8 +2358,8 @@ enum dc_status dce110_apply_ctx_to_hw(
 	struct dc_bios *dcb = dc->ctx->dc_bios;
 	enum dc_status status;
 	int i;
-	bool was_hpo_enabled = dce110_is_hpo_enabled(dc->current_state);
-	bool is_hpo_enabled = dce110_is_hpo_enabled(context);
+	bool was_hpo_acquired = resource_is_hpo_acquired(dc->current_state);
+	bool is_hpo_acquired = resource_is_hpo_acquired(context);
 
 	/* reset syncd pipes from disabled pipes */
 	if (dc->config.use_pipe_ctx_sync_logic)
@@ -2415,8 +2402,8 @@ enum dc_status dce110_apply_ctx_to_hw(
 
 	dce110_setup_audio_dto(dc, context);
 
-	if (dc->hwseq->funcs.setup_hpo_hw_control && was_hpo_enabled != is_hpo_enabled) {
-		dc->hwseq->funcs.setup_hpo_hw_control(dc->hwseq, is_hpo_enabled);
+	if (dc->hwseq->funcs.setup_hpo_hw_control && was_hpo_acquired != is_hpo_acquired) {
+		dc->hwseq->funcs.setup_hpo_hw_control(dc->hwseq, is_hpo_acquired);
 	}
 
 	for (i = 0; i < dc->res_pool->pipe_count; i++) {

drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_init.c

@@ -111,6 +111,7 @@ static const struct hw_sequencer_funcs dcn31_funcs = {
 	.optimize_pwr_state = dcn21_optimize_pwr_state,
 	.exit_optimized_pwr_state = dcn21_exit_optimized_pwr_state,
 	.update_visual_confirm_color = dcn10_update_visual_confirm_color,
+	.setup_hpo_hw_control = dcn31_setup_hpo_hw_control,
 };
 
 static const struct hwseq_private_funcs dcn31_private_funcs = {

drivers/gpu/drm/amd/display/dc/hwss/dcn314/dcn314_init.c

@@ -114,6 +114,7 @@ static const struct hw_sequencer_funcs dcn314_funcs = {
 	.exit_optimized_pwr_state = dcn21_exit_optimized_pwr_state,
 	.update_visual_confirm_color = dcn10_update_visual_confirm_color,
 	.calculate_pix_rate_divider = dcn314_calculate_pix_rate_divider,
+	.setup_hpo_hw_control = dcn31_setup_hpo_hw_control,
 };
 
 static const struct hwseq_private_funcs dcn314_private_funcs = {

drivers/gpu/drm/amd/display/dc/hwss/dcn351/dcn351_init.c

@@ -123,6 +123,7 @@ static const struct hw_sequencer_funcs dcn351_funcs = {
 	.set_long_vtotal = dcn35_set_long_vblank,
 	.calculate_pix_rate_divider = dcn32_calculate_pix_rate_divider,
 	.program_outstanding_updates = dcn32_program_outstanding_updates,
+	.setup_hpo_hw_control = dcn35_setup_hpo_hw_control,
 };
 
 static const struct hwseq_private_funcs dcn351_private_funcs = {

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

@@ -461,6 +461,7 @@ struct hw_sequencer_funcs {
 	void (*set_long_vtotal)(struct pipe_ctx **pipe_ctx, int num_pipes, uint32_t v_total_min, uint32_t v_total_max);
 	void (*program_outstanding_updates)(struct dc *dc,
 			struct dc_state *context);
+	void (*setup_hpo_hw_control)(const struct dce_hwseq *hws, bool enable);
 };
 
 void color_space_to_black_color(

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

@@ -644,4 +644,6 @@ void resource_init_common_dml2_callbacks(struct dc *dc, struct dml2_configuratio
  *Calculate total DET allocated for all pipes for a given OTG_MASTER pipe
  */
 int resource_calculate_det_for_stream(struct dc_state *state, struct pipe_ctx *otg_master);
+
+bool resource_is_hpo_acquired(struct dc_state *context);
 #endif /* DRIVERS_GPU_DRM_AMD_DC_DEV_DC_INC_RESOURCE_H_ */

drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c

@@ -67,6 +67,8 @@ static void dp_retrain_link_dp_test(struct dc_link *link,
 {
 	struct pipe_ctx *pipes[MAX_PIPES];
 	struct dc_state *state = link->dc->current_state;
+	bool was_hpo_acquired = resource_is_hpo_acquired(link->dc->current_state);
+	bool is_hpo_acquired;
 	uint8_t count;
 	int i;
 
@@ -83,6 +85,12 @@ static void dp_retrain_link_dp_test(struct dc_link *link,
 				pipes[i]);
 	}
 
+	if (link->dc->hwss.setup_hpo_hw_control) {
+		is_hpo_acquired = resource_is_hpo_acquired(state);
+		if (was_hpo_acquired != is_hpo_acquired)
+			link->dc->hwss.setup_hpo_hw_control(link->dc->hwseq, is_hpo_acquired);
+	}
+
 	for (i = count-1; i >= 0; i--)
 		link_set_dpms_on(state, pipes[i]);
 }