drm/amd/display: Synchronize displays with different timings

[why]
 Vendor based fan noise improvement

[how]
Report timing synchronizable when DP streams time frame
difference is less than 0.05 percent. Adjust DP  DTOs and
sync displays using  MASTER_UPDATE_LOCK_DB_X_Y

Signed-off-by: Vladimir Stempen <vladimir.stempen@amd.com>
Acked-by: Bindu Ramamurthy <bindu.r@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

4 files changed, 24 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/inc/clock_source.h b/drivers/gpu/drm/amd/display/dc/inc/clock_source.h
index 1b01a9a58d14..e2b3a2c7a927 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/clock_source.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/clock_source.h
@@ -170,6 +170,11 @@ struct clock_source_funcs {
 			const struct clock_source *clock_source,
 			unsigned int inst,
 			unsigned int *pixel_clk_khz);
+	bool (*override_dp_pix_clk)(
+			struct clock_source *clock_source,
+			unsigned int inst,
+			unsigned int pixel_clk,
+			unsigned int ref_clk);
 };
 
 struct clock_source {
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h b/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h
index 754832d216fd..9ff68b67780c 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h
@@ -109,6 +109,12 @@ enum h_timing_div_mode {
 	H_TIMING_DIV_BY4,
 };
 
+enum timing_synchronization_type {
+	NOT_SYNCHRONIZABLE,
+	TIMING_SYNCHRONIZABLE,
+	VBLANK_SYNCHRONIZABLE
+};
+
 struct crc_params {
 	/* Regions used to calculate CRC*/
 	uint16_t windowa_x_start;
@@ -292,6 +298,12 @@ struct timing_generator_funcs {
 			uint32_t window_start, uint32_t window_end);
 	void (*set_vtotal_change_limit)(struct timing_generator *optc,
 			uint32_t limit);
+	void (*align_vblanks)(struct timing_generator *master_optc,
+			struct timing_generator *slave_optc,
+			uint32_t master_pixel_clock_100Hz,
+			uint32_t slave_pixel_clock_100Hz,
+			uint8_t master_clock_divider,
+			uint8_t slave_clock_divider);
 };
 
 #endif
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
index 613b3e3cb46a..2fedfcac6705 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
@@ -111,6 +111,9 @@ struct hw_sequencer_funcs {
 	void (*enable_timing_synchronization)(struct dc *dc,
 			int group_index, int group_size,
 			struct pipe_ctx *grouped_pipes[]);
+	void (*enable_vblanks_synchronization)(struct dc *dc,
+			int group_index, int group_size,
+			struct pipe_ctx *grouped_pipes[]);
 	void (*setup_periodic_interrupt)(struct dc *dc,
 			struct pipe_ctx *pipe_ctx,
 			enum vline_select vline);
diff --git a/drivers/gpu/drm/amd/display/dc/inc/resource.h b/drivers/gpu/drm/amd/display/dc/inc/resource.h
index d89815a46190..3d97078d52a9 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/resource.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/resource.h
@@ -115,6 +115,10 @@ bool resource_are_streams_timing_synchronizable(
 		struct dc_stream_state *stream1,
 		struct dc_stream_state *stream2);
 
+bool resource_are_vblanks_synchronizable(
+		struct dc_stream_state *stream1,
+		struct dc_stream_state *stream2);
+
 struct clock_source *resource_find_used_clk_src_for_sharing(
 		struct resource_context *res_ctx,
 		struct pipe_ctx *pipe_ctx);