drm/amd/display: Calc vline position in dc.

We need to calcualte vline position in DC for DCN.
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1572,13 +1572,13 @@ static void commit_planes_do_stream_update(struct dc *dc,
 					stream_update->adjust->v_total_min,
 					stream_update->adjust->v_total_max);
 
-			if (stream_update->vline0_config && pipe_ctx->stream_res.tg->funcs->program_vline_interrupt)
+			if (stream_update->periodic_vsync_config && pipe_ctx->stream_res.tg->funcs->program_vline_interrupt)
 				pipe_ctx->stream_res.tg->funcs->program_vline_interrupt(
-					pipe_ctx->stream_res.tg, VLINE0, &stream->vline0_config);
+					pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing, VLINE0, &stream->periodic_vsync_config);
 
-			if (stream_update->vline1_config && pipe_ctx->stream_res.tg->funcs->program_vline_interrupt)
+			if (stream_update->enhanced_sync_config && pipe_ctx->stream_res.tg->funcs->program_vline_interrupt)
 				pipe_ctx->stream_res.tg->funcs->program_vline_interrupt(
-					pipe_ctx->stream_res.tg, VLINE1, &stream->vline1_config);
+					pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing, VLINE1, &stream->enhanced_sync_config);
 
 			if ((stream_update->hdr_static_metadata && !stream->use_dynamic_meta) ||
 					stream_update->vrr_infopacket ||

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

@@ -51,11 +51,12 @@ struct freesync_context {
 	bool dummy;
 };
 
-struct vline_config {
-	unsigned int start_line;
-	unsigned int end_line;
+union vline_config {
+	unsigned int line_number;
+	unsigned long long delta_in_ns;
 };
 
+
 struct dc_stream_state {
 	// sink is deprecated, new code should not reference
 	// this pointer
@@ -105,8 +106,8 @@ struct dc_stream_state {
 	/* DMCU info */
 	unsigned int abm_level;
 
-	struct vline_config vline0_config;
-	struct vline_config vline1_config;
+	union vline_config periodic_vsync_config;
+	union vline_config enhanced_sync_config;
 
 	/* from core_stream struct */
 	struct dc_context *ctx;
@@ -155,8 +156,8 @@ struct dc_stream_update {
 	struct dc_info_packet *hdr_static_metadata;
 	unsigned int *abm_level;
 
-	struct vline_config *vline0_config;
-	struct vline_config *vline1_config;
+	union vline_config *periodic_vsync_config;
+	union vline_config *enhanced_sync_config;
 
 	struct dc_crtc_timing_adjust *adjust;
 	struct dc_info_packet *vrr_infopacket;

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c

@@ -92,22 +92,94 @@ static void optc1_disable_stereo(struct timing_generator *optc)
 		OTG_3D_STRUCTURE_STEREO_SEL_OVR, 0);
 }
 
+static uint32_t get_start_vline(struct timing_generator *optc, const struct dc_crtc_timing *dc_crtc_timing)
+{
+	struct dc_crtc_timing patched_crtc_timing;
+	int vesa_sync_start;
+	int asic_blank_end;
+	int interlace_factor;
+	int vertical_line_start;
+
+	patched_crtc_timing = *dc_crtc_timing;
+	optc1_apply_front_porch_workaround(optc, &patched_crtc_timing);
+
+	vesa_sync_start = patched_crtc_timing.h_addressable +
+			patched_crtc_timing.h_border_right +
+			patched_crtc_timing.h_front_porch;
+
+	asic_blank_end = patched_crtc_timing.h_total -
+			vesa_sync_start -
+			patched_crtc_timing.h_border_left;
+
+	interlace_factor = patched_crtc_timing.flags.INTERLACE ? 2 : 1;
+
+	vesa_sync_start = patched_crtc_timing.v_addressable +
+			patched_crtc_timing.v_border_bottom +
+			patched_crtc_timing.v_front_porch;
+
+	asic_blank_end = (patched_crtc_timing.v_total -
+			vesa_sync_start -
+			patched_crtc_timing.v_border_top)
+			* interlace_factor;
+
+	vertical_line_start = asic_blank_end - optc->dlg_otg_param.vstartup_start + 1;
+	if (vertical_line_start < 0) {
+		ASSERT(0);
+		vertical_line_start = 0;
+	}
+
+	return vertical_line_start;
+}
+
+static void calc_vline_position(
+		struct timing_generator *optc,
+		const struct dc_crtc_timing *dc_crtc_timing,
+		unsigned long long vsync_delta,
+		uint32_t *start_line,
+		uint32_t *end_line)
+{
+	unsigned long long req_delta_tens_of_usec = div64_u64((vsync_delta + 9999), 10000);
+	unsigned long long pix_clk_hundreds_khz = div64_u64((dc_crtc_timing->pix_clk_100hz + 999), 1000);
+	uint32_t req_delta_lines = (uint32_t) div64_u64(
+			(req_delta_tens_of_usec * pix_clk_hundreds_khz + dc_crtc_timing->h_total - 1),
+								dc_crtc_timing->h_total);
+
+	uint32_t vsync_line = get_start_vline(optc, dc_crtc_timing);
+
+	if (req_delta_lines != 0)
+			req_delta_lines--;
+
+		if (req_delta_lines > vsync_line)
+			*start_line = dc_crtc_timing->v_total - (req_delta_lines - vsync_line) - 1;
+		else
+			*start_line = vsync_line - req_delta_lines;
+
+		*end_line = *start_line + 2;
+
+		if (*end_line >= dc_crtc_timing->v_total)
+			*end_line = 2;
+}
+
 void optc1_program_vline_interrupt(
 		struct timing_generator *optc,
+		const struct dc_crtc_timing *dc_crtc_timing,
 		enum vline_select vline,
-		const struct vline_config *vline_config)
+		const union vline_config *vline_config)
 {
 	struct optc *optc1 = DCN10TG_FROM_TG(optc);
+	uint32_t start_line = 0;
+	uint32_t end_line = 0;
 
 	switch (vline) {
 	case VLINE0:
+		calc_vline_position(optc, dc_crtc_timing, vline_config->delta_in_ns, &start_line, &end_line);
 		REG_SET_2(OTG_VERTICAL_INTERRUPT0_POSITION, 0,
-				OTG_VERTICAL_INTERRUPT0_LINE_START, vline_config->start_line,
-				OTG_VERTICAL_INTERRUPT0_LINE_END, vline_config->end_line);
+				OTG_VERTICAL_INTERRUPT0_LINE_START, start_line,
+				OTG_VERTICAL_INTERRUPT0_LINE_END, end_line);
 		break;
 	case VLINE1:
 		REG_SET(OTG_VERTICAL_INTERRUPT1_POSITION, 0,
-					OTG_VERTICAL_INTERRUPT1_LINE_START, vline_config->start_line);
+					OTG_VERTICAL_INTERRUPT1_LINE_START, vline_config->line_number);
 		break;
 	default:
 		break;

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.h

@@ -483,9 +483,11 @@ void optc1_program_timing(
 	const struct dc_crtc_timing *dc_crtc_timing,
 	bool use_vbios);
 
-void optc1_program_vline_interrupt(struct timing_generator *optc,
+void optc1_program_vline_interrupt(
+		struct timing_generator *optc,
+		const struct dc_crtc_timing *dc_crtc_timing,
 		enum vline_select vline,
-		const struct vline_config *vline_config);
+		const union vline_config *vline_config);
 
 void optc1_program_global_sync(
 		struct timing_generator *optc);

drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h

@@ -134,7 +134,7 @@ struct dc_crtc_timing;
 
 struct drr_params;
 
-struct vline_config;
+union vline_config;
 
 
 enum vline_select {
@@ -149,9 +149,11 @@ struct timing_generator_funcs {
 	void (*program_timing)(struct timing_generator *tg,
 							const struct dc_crtc_timing *timing,
 							bool use_vbios);
-	void (*program_vline_interrupt)(struct timing_generator *optc,
+	void (*program_vline_interrupt)(
+			struct timing_generator *optc,
+			const struct dc_crtc_timing *dc_crtc_timing,
 			enum vline_select vline,
-			const struct vline_config *vline_config);
+			const union vline_config *vline_config);
 	bool (*enable_crtc)(struct timing_generator *tg);
 	bool (*disable_crtc)(struct timing_generator *tg);
 	bool (*is_counter_moving)(struct timing_generator *tg);