drm/amd/display: Add replay desync error count tracking and reset functionality

[Why & How]
Build-up get/reset desync error count interface and implement the functions.

Reviewed-by: ChunTao Tso <[email protected]>
Reviewed-by: Robin Chen <[email protected]>
Signed-off-by: Jack Chang <[email protected]>
Signed-off-by: Tom Chung <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Jack Chang

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

@@ -1147,6 +1147,8 @@ struct replay_settings {
 	uint16_t abm_with_ips_on_full_screen_video_pseudo_vtotal;
 	/* Replay last pseudo vtotal set to DMUB */
 	uint16_t last_pseudo_vtotal;
+	/* Replay desync error */
+	uint32_t replay_desync_error_fail_count;
 };
 
 /* To split out "global" and "per-panel" config settings.

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c

@@ -239,6 +239,9 @@ static void handle_hpd_irq_replay_sink(struct dc_link *link)
 			&replay_configuration.raw,
 			sizeof(replay_configuration.raw));
 
+		/* Update desync error counter */
+		link->replay_settings.replay_desync_error_fail_count++;
+
 		/* Acknowledge and clear error bits */
 		dm_helpers_dp_write_dpcd(
 			link->ctx,

drivers/gpu/drm/amd/display/modules/power/power_helpers.c

@@ -1039,3 +1039,8 @@ bool fill_custom_backlight_caps(unsigned int config_no, struct dm_acpi_atif_back
 	memcpy(caps->data_points, custom_backlight_profiles[config_no].data_points, data_points_size);
 	return true;
 }
+
+void reset_replay_dsync_error_count(struct dc_link *link)
+{
+	link->replay_settings.replay_desync_error_fail_count = 0;
+}

drivers/gpu/drm/amd/display/modules/power/power_helpers.h

@@ -78,4 +78,5 @@ bool psr_su_set_dsc_slice_height(struct dc *dc, struct dc_link *link,
 
 bool fill_custom_backlight_caps(unsigned int config_no,
 		struct dm_acpi_atif_backlight_caps *caps);
+void reset_replay_dsync_error_count(struct dc_link *link);
 #endif /* MODULES_POWER_POWER_HELPERS_H_ */