drm/amd/display: change static screen wait frame_count for ips

[Why]
the original wait for 2 static frames before enter static screen
was not good enough for IPS-enabled case since enter/exit takes more time.

[How]
Changed logic for hardcoded wait frame values.
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Allen Pan <allen.pan@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/dc.h

@@ -982,6 +982,7 @@ struct dc_debug_options {
 	unsigned int ips2_entry_delay_us;
 	bool disable_timeout;
 	bool disable_extblankadj;
+	unsigned int static_screen_wait_frames;
 };
 
 struct gpu_info_soc_bounding_box_v1_0;

drivers/gpu/drm/amd/display/dc/dcn35/dcn35_init.c

@@ -68,7 +68,7 @@ static const struct hw_sequencer_funcs dcn35_funcs = {
 	.prepare_bandwidth = dcn35_prepare_bandwidth,
 	.optimize_bandwidth = dcn35_optimize_bandwidth,
 	.update_bandwidth = dcn20_update_bandwidth,
-	.set_drr = dcn10_set_drr,
+	.set_drr = dcn35_set_drr,
 	.get_position = dcn10_get_position,
 	.set_static_screen_control = dcn30_set_static_screen_control,
 	.setup_stereo = dcn10_setup_stereo,

drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c

@@ -1312,3 +1312,44 @@ uint32_t dcn35_get_idle_state(const struct dc *dc)
 
 	return 0;
 }
+
+void dcn35_set_drr(struct pipe_ctx **pipe_ctx,
+		int num_pipes, struct dc_crtc_timing_adjust adjust)
+{
+	int i = 0;
+	struct drr_params params = {0};
+	// DRR set trigger event mapped to OTG_TRIG_A (bit 11) for manual control flow
+	unsigned int event_triggers = 0x800;
+	// Note DRR trigger events are generated regardless of whether num frames met.
+	unsigned int num_frames = 2;
+
+	params.vertical_total_max = adjust.v_total_max;
+	params.vertical_total_min = adjust.v_total_min;
+	params.vertical_total_mid = adjust.v_total_mid;
+	params.vertical_total_mid_frame_num = adjust.v_total_mid_frame_num;
+
+	for (i = 0; i < num_pipes; i++) {
+		if ((pipe_ctx[i]->stream_res.tg != NULL) && pipe_ctx[i]->stream_res.tg->funcs) {
+			struct dc_crtc_timing *timing = &pipe_ctx[i]->stream->timing;
+			struct dc *dc = pipe_ctx[i]->stream->ctx->dc;
+
+			if (dc->debug.static_screen_wait_frames) {
+				unsigned int frame_rate = timing->pix_clk_100hz / (timing->h_total * timing->v_total);
+
+				if (frame_rate >= 120 && dc->caps.ips_support &&
+					dc->config.disable_ips != DMUB_IPS_DISABLE_ALL) {
+					/*ips enable case*/
+					num_frames = 2 * (frame_rate % 60);
+				}
+			}
+			if (pipe_ctx[i]->stream_res.tg->funcs->set_drr)
+				pipe_ctx[i]->stream_res.tg->funcs->set_drr(
+					pipe_ctx[i]->stream_res.tg, &params);
+			if (adjust.v_total_max != 0 && adjust.v_total_min != 0)
+				if (pipe_ctx[i]->stream_res.tg->funcs->set_static_screen_control)
+					pipe_ctx[i]->stream_res.tg->funcs->set_static_screen_control(
+						pipe_ctx[i]->stream_res.tg,
+						event_triggers, num_frames);
+		}
+	}
+}

drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.h

@@ -86,4 +86,8 @@ void dcn35_dsc_pg_control(
 
 void dcn35_set_idle_state(const struct dc *dc, bool allow_idle);
 uint32_t dcn35_get_idle_state(const struct dc *dc);
+
+void dcn35_set_drr(struct pipe_ctx **pipe_ctx,
+		int num_pipes, struct dc_crtc_timing_adjust adjust);
+
 #endif /* __DC_HWSS_DCN35_H__ */

drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c

@@ -780,7 +780,8 @@ static const struct dc_debug_options debug_defaults_drv = {
 	.ignore_pg = true,
 	.psp_disabled_wa = true,
 	.ips2_eval_delay_us = 200,
-	.ips2_entry_delay_us = 400
+	.ips2_entry_delay_us = 400,
+	.static_screen_wait_frames = 2,
 };
 
 static const struct dc_panel_config panel_config_defaults = {