drm/amd/display: Add some hardware status in DTN log debugfs

[Why]
For debug purpose, we need to check the following hardware status
in DTN log debugfs:
1.dpp & hubp clock enable;
2.crtc blank enable;
3.link phy status;

[How]
Add the upper information in the amdgpu_dm_dtn_log debugfs.

For CRTC blanked status, since DCN2 and greater reports it on the OPP
instead of OTG, we patch it in after calling optc1_read_otg_states.
Ideally, this should be done in the DCN version specific function hooks.
It has been left as a TODO item.
Signed-off-by: Leo (Hanghong) Ma <hanghong.ma@amd.com>
Reviewed-by: Mikita Lipski <Mikita.Lipski@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@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/dcn10/dcn10_hubp.c

@@ -1014,6 +1014,9 @@ void hubp1_read_state_common(struct hubp *hubp)
 			HUBP_TTU_DISABLE, &s->ttu_disable,
 			HUBP_UNDERFLOW_STATUS, &s->underflow_status);
 
+	REG_GET(HUBP_CLK_CNTL,
+			HUBP_CLOCK_ENABLE, &s->clock_en);
+
 	REG_GET(DCN_GLOBAL_TTU_CNTL,
 			MIN_TTU_VBLANK, &s->min_ttu_vblank);
 

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.h

@@ -670,6 +670,7 @@ struct dcn_hubp_state {
 	uint32_t sw_mode;
 	uint32_t dcc_en;
 	uint32_t blank_en;
+	uint32_t clock_en;
 	uint32_t underflow_status;
 	uint32_t ttu_disable;
 	uint32_t min_ttu_vblank;

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -129,9 +129,8 @@ static void dcn10_log_hubp_states(struct dc *dc, void *log_ctx)
 	struct resource_pool *pool = dc->res_pool;
 	int i;
 
-	DTN_INFO("HUBP:  format  addr_hi  width  height"
-			"  rot  mir  sw_mode  dcc_en  blank_en  ttu_dis  underflow"
-			"   min_ttu_vblank       qos_low_wm      qos_high_wm\n");
+	DTN_INFO(
+		"HUBP:  format  addr_hi  width  height  rot  mir  sw_mode  dcc_en  blank_en  clock_en  ttu_dis  underflow   min_ttu_vblank       qos_low_wm      qos_high_wm\n");
 	for (i = 0; i < pool->pipe_count; i++) {
 		struct hubp *hubp = pool->hubps[i];
 		struct dcn_hubp_state *s = &(TO_DCN10_HUBP(hubp)->state);
@@ -139,8 +138,7 @@ static void dcn10_log_hubp_states(struct dc *dc, void *log_ctx)
 		hubp->funcs->hubp_read_state(hubp);
 
 		if (!s->blank_en) {
-			DTN_INFO("[%2d]:  %5xh  %6xh  %5d  %6d  %2xh  %2xh  %6xh"
-					"  %6d  %8d  %7d  %8xh",
+			DTN_INFO("[%2d]:  %5xh  %6xh  %5d  %6d  %2xh  %2xh  %6xh  %6d  %8d  %8d  %7d  %8xh",
 					hubp->inst,
 					s->pixel_format,
 					s->inuse_addr_hi,
@@ -151,6 +149,7 @@ static void dcn10_log_hubp_states(struct dc *dc, void *log_ctx)
 					s->sw_mode,
 					s->dcc_en,
 					s->blank_en,
+					s->clock_en,
 					s->ttu_disable,
 					s->underflow_status);
 			DTN_INFO_MICRO_SEC(s->min_ttu_vblank);
@@ -308,21 +307,35 @@ void dcn10_log_hw_state(struct dc *dc,
 	}
 	DTN_INFO("\n");
 
-	DTN_INFO("OTG:  v_bs  v_be  v_ss  v_se  vpol  vmax  vmin  vmax_sel  vmin_sel"
-			"  h_bs  h_be  h_ss  h_se  hpol  htot  vtot  underflow\n");
+	DTN_INFO("OTG:  v_bs  v_be  v_ss  v_se  vpol  vmax  vmin  vmax_sel  vmin_sel  h_bs  h_be  h_ss  h_se  hpol  htot  vtot  underflow blank_en\n");
 
 	for (i = 0; i < pool->timing_generator_count; i++) {
 		struct timing_generator *tg = pool->timing_generators[i];
 		struct dcn_otg_state s = {0};
-
+		/* Read shared OTG state registers for all DCNx */
 		optc1_read_otg_state(DCN10TG_FROM_TG(tg), &s);
 
+#ifdef CONFIG_DRM_AMD_DC_DCN2_0
+		/*
+		 * For DCN2 and greater, a register on the OPP is used to
+		 * determine if the CRTC is blanked instead of the OTG. So use
+		 * dpg_is_blanked() if exists, otherwise fallback on otg.
+		 *
+		 * TODO: Implement DCN-specific read_otg_state hooks.
+		 */
+		if (pool->opps[i]->funcs->dpg_is_blanked)
+			s.blank_enabled = pool->opps[i]->funcs->dpg_is_blanked(pool->opps[i]);
+		else
+			s.blank_enabled = tg->funcs->is_blanked(tg);
+#else
+		s.blank_enabled = tg->funcs->is_blanked(tg);
+#endif
+
 		//only print if OTG master is enabled
 		if ((s.otg_enabled & 1) == 0)
 			continue;
 
-		DTN_INFO("[%d]: %5d %5d %5d %5d %5d %5d %5d %9d %9d %5d %5d %5d"
-				" %5d %5d %5d %5d  %9d\n",
+		DTN_INFO("[%d]: %5d %5d %5d %5d %5d %5d %5d %9d %9d %5d %5d %5d %5d %5d %5d %5d  %9d %8d\n",
 				tg->inst,
 				s.v_blank_start,
 				s.v_blank_end,
@@ -340,7 +353,8 @@ void dcn10_log_hw_state(struct dc *dc,
 				s.h_sync_a_pol,
 				s.h_total,
 				s.v_total,
-				s.underflow_occurred_status);
+				s.underflow_occurred_status,
+				s.blank_enabled);
 
 		// Clear underflow for debug purposes
 		// We want to keep underflow sticky bit on for the longevity tests outside of test environment.
@@ -387,7 +401,7 @@ void dcn10_log_hw_state(struct dc *dc,
 	}
 	DTN_INFO("\n");
 
-	DTN_INFO("L_ENC: DPHY_FEC_EN  DPHY_FEC_READY_SHADOW  DPHY_FEC_ACTIVE_STATUS\n");
+	DTN_INFO("L_ENC: DPHY_FEC_EN  DPHY_FEC_READY_SHADOW  DPHY_FEC_ACTIVE_STATUS  DP_LINK_TRAINING_COMPLETE\n");
 	for (i = 0; i < dc->link_count; i++) {
 		struct link_encoder *lenc = dc->links[i]->link_enc;
 
@@ -395,11 +409,12 @@ void dcn10_log_hw_state(struct dc *dc,
 
 		if (lenc->funcs->read_state) {
 			lenc->funcs->read_state(lenc, &s);
-			DTN_INFO("[%-3d]: %-12d %-22d %-22d\n",
+			DTN_INFO("[%-3d]: %-12d %-22d %-22d %-25d\n",
 				i,
 				s.dphy_fec_en,
 				s.dphy_fec_ready_shadow,
-				s.dphy_fec_active_status);
+				s.dphy_fec_active_status,
+				s.dp_link_training_complete);
 			DTN_INFO("\n");
 		}
 	}

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c

@@ -406,6 +406,7 @@ static const struct opp_funcs dcn10_opp_funcs = {
 		.opp_pipe_clock_control = opp1_pipe_clock_control,
 #if defined(CONFIG_DRM_AMD_DC_DCN2_0)
 		.opp_set_disp_pattern_generator = NULL,
+		.dpg_is_blanked = NULL,
 #endif
 		.opp_destroy = opp1_destroy
 };

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

@@ -542,6 +542,7 @@ struct dcn_otg_state {
 	uint32_t h_total;
 	uint32_t underflow_occurred_status;
 	uint32_t otg_enabled;
+	uint32_t blank_enabled;
 };
 
 void optc1_read_otg_state(struct optc *optc1,

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c

@@ -203,6 +203,7 @@ void link_enc2_read_state(struct link_encoder *enc, struct link_enc_state *s)
 	REG_GET(DP_DPHY_CNTL, DPHY_FEC_EN, &s->dphy_fec_en);
 	REG_GET(DP_DPHY_CNTL, DPHY_FEC_READY_SHADOW, &s->dphy_fec_ready_shadow);
 	REG_GET(DP_DPHY_CNTL, DPHY_FEC_ACTIVE_STATUS, &s->dphy_fec_active_status);
+	REG_GET(DP_LINK_CNTL, DP_LINK_TRAINING_COMPLETE, &s->dp_link_training_complete);
 }
 #endif
 

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

@@ -124,6 +124,7 @@ struct link_enc_state {
 		uint32_t dphy_fec_en;
 		uint32_t dphy_fec_ready_shadow;
 		uint32_t dphy_fec_active_status;
+		uint32_t dp_link_training_complete;
 
 };
 #endif