drm/amd/display: Add vline IRQ programming for DCN

Signed-off-by: SivapiriyanKumarasamy <sivapiriyan.kumarasamy@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1375,6 +1375,12 @@ static void commit_planes_for_stream(struct dc *dc,
 					pipe_ctx->stream_res.abm->funcs->set_abm_level(
 							pipe_ctx->stream_res.abm, stream->abm_level);
 			}
+
+			if (stream_update && stream_update->periodic_fn_vsync_delta &&
+					pipe_ctx->stream_res.tg->funcs->program_vline_interrupt)
+				pipe_ctx->stream_res.tg->funcs->program_vline_interrupt(
+						pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing,
+						pipe_ctx->stream->periodic_fn_vsync_delta);
 		}
 	}
 

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

@@ -70,6 +70,9 @@ struct dc_stream_state {
 	enum color_transfer_func output_tf;
 
 	bool ignore_msa_timing_param;
+
+	unsigned long long periodic_fn_vsync_delta;
+
 	/* TODO: custom INFO packets */
 	/* TODO: ABM info (DMCU) */
 	/* PSR info */
@@ -113,6 +116,7 @@ struct dc_stream_update {
 	struct dc_hdr_static_metadata *hdr_static_metadata;
 	enum color_transfer_func color_output_tf;
 	unsigned int *abm_level;
+	unsigned long long *periodic_fn_vsync_delta;
 };
 
 bool dc_is_stream_unchanged(

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

@@ -93,6 +93,81 @@ 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;
+	uint32_t vesa_sync_start;
+	uint32_t asic_blank_end;
+	uint32_t interlace_factor;
+	uint32_t 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;
+}
+
+void optc1_program_vline_interrupt(
+		struct timing_generator *optc,
+		const struct dc_crtc_timing *dc_crtc_timing,
+		unsigned long long vsync_delta)
+{
+
+	struct optc *optc1 = DCN10TG_FROM_TG(optc);
+
+	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_khz + 99), 100);
+	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);
+	uint32_t start_line = 0;
+	uint32_t endLine = 0;
+
+	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;
+
+	endLine = start_line + 2;
+
+	if (endLine >= dc_crtc_timing->v_total)
+		endLine = 2;
+
+	REG_SET_2(OTG_VERTICAL_INTERRUPT0_POSITION, 0,
+			OTG_VERTICAL_INTERRUPT0_LINE_START, start_line,
+			OTG_VERTICAL_INTERRUPT0_LINE_END, endLine);
+}
+
 /**
  * program_timing_generator   used by mode timing set
  * Program CRTC Timing Registers - OTG_H_*, OTG_V_*, Pixel repetition.
@@ -1215,6 +1290,7 @@ static bool optc1_is_optc_underflow_occurred(struct timing_generator *optc)
 static const struct timing_generator_funcs dcn10_tg_funcs = {
 		.validate_timing = optc1_validate_timing,
 		.program_timing = optc1_program_timing,
+		.program_vline_interrupt = optc1_program_vline_interrupt,
 		.program_global_sync = optc1_program_global_sync,
 		.enable_crtc = optc1_enable_crtc,
 		.disable_crtc = optc1_disable_crtc,

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

@@ -65,6 +65,8 @@
 	SRI(OTG_NOM_VERT_POSITION, OTG, inst),\
 	SRI(OTG_BLACK_COLOR, OTG, inst),\
 	SRI(OTG_CLOCK_CONTROL, OTG, inst),\
+	SRI(OTG_VERTICAL_INTERRUPT0_CONTROL, OTG, inst),\
+	SRI(OTG_VERTICAL_INTERRUPT0_POSITION, OTG, inst),\
 	SRI(OTG_VERTICAL_INTERRUPT2_CONTROL, OTG, inst),\
 	SRI(OTG_VERTICAL_INTERRUPT2_POSITION, OTG, inst),\
 	SRI(OPTC_INPUT_CLOCK_CONTROL, ODM, inst),\
@@ -124,6 +126,8 @@ struct dcn_optc_registers {
 	uint32_t OTG_TEST_PATTERN_CONTROL;
 	uint32_t OTG_TEST_PATTERN_COLOR;
 	uint32_t OTG_CLOCK_CONTROL;
+	uint32_t OTG_VERTICAL_INTERRUPT0_CONTROL;
+	uint32_t OTG_VERTICAL_INTERRUPT0_POSITION;
 	uint32_t OTG_VERTICAL_INTERRUPT2_CONTROL;
 	uint32_t OTG_VERTICAL_INTERRUPT2_POSITION;
 	uint32_t OPTC_INPUT_CLOCK_CONTROL;
@@ -206,6 +210,9 @@ struct dcn_optc_registers {
 	SF(OTG0_OTG_CLOCK_CONTROL, OTG_CLOCK_EN, mask_sh),\
 	SF(OTG0_OTG_CLOCK_CONTROL, OTG_CLOCK_ON, mask_sh),\
 	SF(OTG0_OTG_CLOCK_CONTROL, OTG_CLOCK_GATE_DIS, mask_sh),\
+	SF(OTG0_OTG_VERTICAL_INTERRUPT0_CONTROL, OTG_VERTICAL_INTERRUPT0_INT_ENABLE, mask_sh),\
+	SF(OTG0_OTG_VERTICAL_INTERRUPT0_POSITION, OTG_VERTICAL_INTERRUPT0_LINE_START, mask_sh),\
+	SF(OTG0_OTG_VERTICAL_INTERRUPT0_POSITION, OTG_VERTICAL_INTERRUPT0_LINE_END, mask_sh),\
 	SF(OTG0_OTG_VERTICAL_INTERRUPT2_CONTROL, OTG_VERTICAL_INTERRUPT2_INT_ENABLE, mask_sh),\
 	SF(OTG0_OTG_VERTICAL_INTERRUPT2_POSITION, OTG_VERTICAL_INTERRUPT2_LINE_START, mask_sh),\
 	SF(ODM0_OPTC_INPUT_CLOCK_CONTROL, OPTC_INPUT_CLK_EN, mask_sh),\
@@ -323,6 +330,9 @@ struct dcn_optc_registers {
 	type OTG_CLOCK_EN;\
 	type OTG_CLOCK_ON;\
 	type OTG_CLOCK_GATE_DIS;\
+	type OTG_VERTICAL_INTERRUPT0_INT_ENABLE;\
+	type OTG_VERTICAL_INTERRUPT0_LINE_START;\
+	type OTG_VERTICAL_INTERRUPT0_LINE_END;\
 	type OTG_VERTICAL_INTERRUPT2_INT_ENABLE;\
 	type OTG_VERTICAL_INTERRUPT2_LINE_START;\
 	type OPTC_INPUT_CLK_EN;\
@@ -420,6 +430,10 @@ void optc1_program_timing(
 	const struct dc_crtc_timing *dc_crtc_timing,
 	bool use_vbios);
 
+void optc1_program_vline_interrupt(struct timing_generator *optc,
+		const struct dc_crtc_timing *dc_crtc_timing,
+		unsigned long long vsync_delta);
+
 void optc1_program_global_sync(
 		struct timing_generator *optc);
 

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

@@ -140,6 +140,9 @@ 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,
+			const struct dc_crtc_timing *dc_crtc_timing,
+			unsigned long long vsync_delta);
 	bool (*enable_crtc)(struct timing_generator *tg);
 	bool (*disable_crtc)(struct timing_generator *tg);
 	bool (*is_counter_moving)(struct timing_generator *tg);

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

@@ -135,6 +135,13 @@ enum dc_irq_source {
 	DC_IRQ_SOURCE_VBLANK5,
 	DC_IRQ_SOURCE_VBLANK6,
 
+	DC_IRQ_SOURCE_DC1_VLINE0,
+	DC_IRQ_SOURCE_DC2_VLINE0,
+	DC_IRQ_SOURCE_DC3_VLINE0,
+	DC_IRQ_SOURCE_DC4_VLINE0,
+	DC_IRQ_SOURCE_DC5_VLINE0,
+	DC_IRQ_SOURCE_DC6_VLINE0,
+
 	DAL_IRQ_SOURCES_NUMBER
 };