drm/amd/display: Add more logging for MALL static screen

[why & how]
print additional info for MALL related calculations and DMCUB messaging
to aid debugging.
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c

@@ -1309,9 +1309,11 @@ bool dcn401_apply_idle_power_optimizations(struct dc *dc, bool enable)
 	for (i = 0; i < dc->current_state->stream_count; i++) {
 		/* MALL SS messaging is not supported with PSR at this time */
 		if (dc->current_state->streams[i] != NULL &&
-				dc->current_state->streams[i]->link->psr_settings.psr_version != DC_PSR_VERSION_UNSUPPORTED)
+				dc->current_state->streams[i]->link->psr_settings.psr_version != DC_PSR_VERSION_UNSUPPORTED) {
+			DC_LOG_MALL("MALL SS not supported with PSR at this time\n");
 			return false;
 		}
+	}
 
 	memset(&cmd, 0, sizeof(cmd));
 	cmd.cab.header.type = DMUB_CMD__CAB_FOR_SS;
@@ -1320,8 +1322,9 @@ bool dcn401_apply_idle_power_optimizations(struct dc *dc, bool enable)
 	if (enable) {
 		if (dcn401_check_no_memory_request_for_cab(dc)) {
 			/* 1. Check no memory request case for CAB.
-			 * If no memory request case, send CAB_ACTION NO_DF_REQ DMUB message
+			 * If no memory request case, send CAB_ACTION NO_DCN_REQ DMUB message
 			 */
+			DC_LOG_MALL("sending CAB action NO_DCN_REQ\n");
 			cmd.cab.header.sub_type = DMUB_CMD__CAB_NO_DCN_REQ;
 		} else {
 			/* 2. Check if all surfaces can fit in CAB.
@@ -1349,13 +1352,16 @@ bool dcn401_apply_idle_power_optimizations(struct dc *dc, bool enable)
 			if (ways <= dc->caps.cache_num_ways && !mall_ss_unsupported) {
 				cmd.cab.header.sub_type = DMUB_CMD__CAB_DCN_SS_FIT_IN_CAB;
 				cmd.cab.cab_alloc_ways = ways;
+				DC_LOG_MALL("cab allocation: %d ways. CAB action: DCN_SS_FIT_IN_CAB\n", ways);
 			} else {
 				cmd.cab.header.sub_type = DMUB_CMD__CAB_DCN_SS_NOT_FIT_IN_CAB;
+				DC_LOG_MALL("frame does not fit in CAB: %d ways required. CAB action: DCN_SS_NOT_FIT_IN_CAB\n", ways);
 			}
 		}
 	} else {
 		/* Disable CAB */
 		cmd.cab.header.sub_type = DMUB_CMD__CAB_NO_IDLE_OPTIMIZATION;
+		DC_LOG_MALL("idle optimization disabled\n");
 	}
 
 	dm_execute_dmub_cmd(dc->ctx, &cmd, DM_DMUB_WAIT_TYPE_WAIT);

drivers/gpu/drm/amd/display/include/logger_types.h

@@ -61,6 +61,7 @@
 #define DC_LOG_ALL_TF_CHANNELS(...) pr_debug("[GAMMA]:"__VA_ARGS__)
 #define DC_LOG_DSC(...) drm_dbg_dp((DC_LOGGER)->dev, __VA_ARGS__)
 #define DC_LOG_SMU(...) pr_debug("[SMU_MSG]:"__VA_ARGS__)
+#define DC_LOG_MALL(...) pr_debug("[MALL]:"__VA_ARGS__)
 #define DC_LOG_DWB(...) drm_dbg((DC_LOGGER)->dev, __VA_ARGS__)
 #define DC_LOG_DP2(...) drm_dbg_dp((DC_LOGGER)->dev, __VA_ARGS__)
 #define DC_LOG_AUTO_DPM_TEST(...) pr_debug("[AutoDPMTest]: "__VA_ARGS__)