drm/amd/display: Fix manual trigger source for DCN2

Fix manual trigger source correctly be TRIGA for DCN2
rather than MANUAL_FLOW.
Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c

@@ -390,14 +390,8 @@ void optc2_setup_manual_trigger(struct timing_generator *optc)
 {
 	struct optc *optc1 = DCN10TG_FROM_TG(optc);
 
-	REG_SET(OTG_MANUAL_FLOW_CONTROL, 0,
-			MANUAL_FLOW_CONTROL, 1);
-
-	REG_SET(OTG_GLOBAL_CONTROL2, 0,
-			MANUAL_FLOW_CONTROL_SEL, optc->inst);
-
 	REG_SET_8(OTG_TRIGA_CNTL, 0,
-			OTG_TRIGA_SOURCE_SELECT, 22,
+			OTG_TRIGA_SOURCE_SELECT, 21,
 			OTG_TRIGA_SOURCE_PIPE_SELECT, optc->inst,
 			OTG_TRIGA_RISING_EDGE_DETECT_CNTL, 1,
 			OTG_TRIGA_FALLING_EDGE_DETECT_CNTL, 0,

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.h

@@ -106,6 +106,7 @@ void optc2_triplebuffer_lock(struct timing_generator *optc);
 void optc2_triplebuffer_unlock(struct timing_generator *optc);
 void optc2_lock_doublebuffer_disable(struct timing_generator *optc);
 void optc2_lock_doublebuffer_enable(struct timing_generator *optc);
+void optc2_setup_manual_trigger(struct timing_generator *optc);
 void optc2_program_manual_trigger(struct timing_generator *optc);
 bool optc2_is_two_pixels_per_containter(const struct dc_crtc_timing *timing);
 #endif /* __DC_OPTC_DCN20_H__ */