drm/amd/display: Add DSC Debug Log

Add DSC log in each critical routines to facilitate debugging.
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -6452,7 +6452,8 @@ static void apply_dsc_policy_for_stream(struct amdgpu_dm_connector *aconnector,
 						dc_link_get_highest_encoding_format(aconnector->dc_link),
 						&stream->timing.dsc_cfg)) {
 				stream->timing.flags.DSC = 1;
-				DRM_DEBUG_DRIVER("%s: [%s] DSC is selected from SST RX\n", __func__, drm_connector->name);
+				DRM_DEBUG_DRIVER("%s: SST_DSC [%s] DSC is selected from SST RX\n",
+							__func__, drm_connector->name);
 			}
 		} else if (sink->link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_HDMI_CONVERTER) {
 			timing_bw_in_kbps = dc_bandwidth_in_kbps_from_timing(&stream->timing,
@@ -6471,7 +6472,7 @@ static void apply_dsc_policy_for_stream(struct amdgpu_dm_connector *aconnector,
 						dc_link_get_highest_encoding_format(aconnector->dc_link),
 						&stream->timing.dsc_cfg)) {
 					stream->timing.flags.DSC = 1;
-					DRM_DEBUG_DRIVER("%s: [%s] DSC is selected from DP-HDMI PCON\n",
+					DRM_DEBUG_DRIVER("%s: SST_DSC [%s] DSC is selected from DP-HDMI PCON\n",
 									 __func__, drm_connector->name);
 				}
 		}
@@ -11594,7 +11595,7 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 		if (dc_resource_is_dsc_encoding_supported(dc)) {
 			ret = compute_mst_dsc_configs_for_state(state, dm_state->context, vars);
 			if (ret) {
-				drm_dbg_atomic(dev, "compute_mst_dsc_configs_for_state() failed\n");
+				drm_dbg_atomic(dev, "MST_DSC compute_mst_dsc_configs_for_state() failed\n");
 				ret = -EINVAL;
 				goto fail;
 			}
@@ -11615,7 +11616,7 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 		 */
 		ret = drm_dp_mst_atomic_check(state);
 		if (ret) {
-			drm_dbg_atomic(dev, "drm_dp_mst_atomic_check() failed\n");
+			drm_dbg_atomic(dev, "MST drm_dp_mst_atomic_check() failed\n");
 			goto fail;
 		}
 		status = dc_validate_global_state(dc, dm_state->context, true);

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c

@@ -759,7 +759,7 @@ static uint8_t write_dsc_enable_synaptics_non_virtual_dpcd_mst(
 	uint8_t ret = 0;
 
 	drm_dbg_dp(aux->drm_dev,
-		   "Configure DSC to non-virtual dpcd synaptics\n");
+		   "MST_DSC Configure DSC to non-virtual dpcd synaptics\n");
 
 	if (enable) {
 		/* When DSC is enabled on previous boot and reboot with the hub,
@@ -772,7 +772,7 @@ static uint8_t write_dsc_enable_synaptics_non_virtual_dpcd_mst(
 			apply_synaptics_fifo_reset_wa(aux);
 
 		ret = drm_dp_dpcd_write(aux, DP_DSC_ENABLE, &enable, 1);
-		DRM_INFO("Send DSC enable to synaptics\n");
+		DRM_INFO("MST_DSC Send DSC enable to synaptics\n");
 
 	} else {
 		/* Synaptics hub not support virtual dpcd,
@@ -781,7 +781,7 @@ static uint8_t write_dsc_enable_synaptics_non_virtual_dpcd_mst(
 		 */
 		if (!stream->link->link_status.link_active) {
 			ret = drm_dp_dpcd_write(aux, DP_DSC_ENABLE, &enable, 1);
-			DRM_INFO("Send DSC disable to synaptics\n");
+			DRM_INFO("MST_DSC Send DSC disable to synaptics\n");
 		}
 	}
 
@@ -823,14 +823,14 @@ bool dm_helpers_dp_write_dsc_enable(
 							DP_DSC_ENABLE,
 							&enable_passthrough, 1);
 				drm_dbg_dp(dev,
-					   "Sent DSC pass-through enable to virtual dpcd port, ret = %u\n",
+					   "MST_DSC Sent DSC pass-through enable to virtual dpcd port, ret = %u\n",
 					   ret);
 			}
 
 			ret = drm_dp_dpcd_write(aconnector->dsc_aux,
 						DP_DSC_ENABLE, &enable_dsc, 1);
 			drm_dbg_dp(dev,
-				   "Sent DSC decoding enable to %s port, ret = %u\n",
+				   "MST_DSC Sent DSC decoding enable to %s port, ret = %u\n",
 				   (port->passthrough_aux) ? "remote RX" :
 				   "virtual dpcd",
 				   ret);
@@ -838,7 +838,7 @@ bool dm_helpers_dp_write_dsc_enable(
 			ret = drm_dp_dpcd_write(aconnector->dsc_aux,
 						DP_DSC_ENABLE, &enable_dsc, 1);
 			drm_dbg_dp(dev,
-				   "Sent DSC decoding disable to %s port, ret = %u\n",
+				   "MST_DSC Sent DSC decoding disable to %s port, ret = %u\n",
 				   (port->passthrough_aux) ? "remote RX" :
 				   "virtual dpcd",
 				   ret);
@@ -848,7 +848,7 @@ bool dm_helpers_dp_write_dsc_enable(
 							DP_DSC_ENABLE,
 							&enable_passthrough, 1);
 				drm_dbg_dp(dev,
-					   "Sent DSC pass-through disable to virtual dpcd port, ret = %u\n",
+					   "MST_DSC Sent DSC pass-through disable to virtual dpcd port, ret = %u\n",
 					   ret);
 			}
 		}
@@ -858,12 +858,12 @@ bool dm_helpers_dp_write_dsc_enable(
 		if (stream->sink->link->dpcd_caps.dongle_type == DISPLAY_DONGLE_NONE) {
 			ret = dm_helpers_dp_write_dpcd(ctx, stream->link, DP_DSC_ENABLE, &enable_dsc, 1);
 			drm_dbg_dp(dev,
-				   "Send DSC %s to SST RX\n",
+				   "SST_DSC Send DSC %s to SST RX\n",
 				   enable_dsc ? "enable" : "disable");
 		} else if (stream->sink->link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_HDMI_CONVERTER) {
 			ret = dm_helpers_dp_write_dpcd(ctx, stream->link, DP_DSC_ENABLE, &enable_dsc, 1);
 			drm_dbg_dp(dev,
-				   "Send DSC %s to DP-HDMI PCON\n",
+				   "SST_DSC Send DSC %s to DP-HDMI PCON\n",
 				   enable_dsc ? "enable" : "disable");
 		}
 	}