[PATCH 15/17] drm/amd/powerplay: add control method to bypass metrics cache on Renoir

[Evan Quan]

As for the gpu metric export, metrics cache makes no sense. It's up to
user to decide how often the metrics should be retrieved.

Change-Id: I780aba0be35a35bd9c9727118b33625e7cc9bf1f
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/powerplay/renoir_ppt.c | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/renoir_ppt.c b/drivers/gpu/drm/amd/powerplay/renoir_ppt.c
index 61e8700a7bdb..4c1a506c3c17 100644
--- a/drivers/gpu/drm/amd/powerplay/renoir_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/renoir_ppt.c
@@ -129,13 +129,17 @@ static struct cmn2asic_mapping renoir_workload_map[PP_SMC_POWER_PROFILE_COUNT] =
 };
 
 static int renoir_get_metrics_table(struct smu_context *smu,
-				    SmuMetrics_t *metrics_table)
+				    SmuMetrics_t *metrics_table,
+				    bool bypass_cache)
 {
 	struct smu_table_context *smu_table= &smu->smu_table;
 	int ret = 0;
 
 	mutex_lock(&smu->metrics_lock);
-	if (!smu_table->metrics_time || time_after(jiffies, smu_table->metrics_time + msecs_to_jiffies(100))) {
+
+	if (bypass_cache ||
+	    !smu_table->metrics_time ||
+	    time_after(jiffies, smu_table->metrics_time + msecs_to_jiffies(100))) {
 		ret = smu_cmn_update_table(smu, SMU_TABLE_SMU_METRICS, 0,
 				(void *)smu_table->metrics_table, false);
 		if (ret) {
@@ -146,7 +150,9 @@ static int renoir_get_metrics_table(struct smu_context *smu,
 		smu_table->metrics_time = jiffies;
 	}
 
-	memcpy(metrics_table, smu_table->metrics_table, sizeof(SmuMetrics_t));
+	if (metrics_table)
+		memcpy(metrics_table, smu_table->metrics_table, sizeof(SmuMetrics_t));
+
 	mutex_unlock(&smu->metrics_lock);
 
 	return ret;
@@ -375,7 +381,7 @@ static int renoir_print_clk_levels(struct smu_context *smu,
 
 	memset(&metrics, 0, sizeof(metrics));
 
-	ret = renoir_get_metrics_table(smu, &metrics);
+	ret = renoir_get_metrics_table(smu, &metrics, false);
 	if (ret)
 		return ret;
 
@@ -529,7 +535,7 @@ static int renoir_get_current_clk_freq_by_table(struct smu_context *smu,
 	int ret = 0, clk_id = 0;
 	SmuMetrics_t metrics;
 
-	ret = renoir_get_metrics_table(smu, &metrics);
+	ret = renoir_get_metrics_table(smu, &metrics, false);
 	if (ret)
 		return ret;
 
@@ -612,7 +618,7 @@ static int renoir_get_gpu_temperature(struct smu_context *smu, uint32_t *value)
 	if (!value)
 		return -EINVAL;
 
-	ret = renoir_get_metrics_table(smu, &metrics);
+	ret = renoir_get_metrics_table(smu, &metrics, false);
 	if (ret)
 		return ret;
 
@@ -632,7 +638,7 @@ static int renoir_get_current_activity_percent(struct smu_context *smu,
 	if (!value)
 		return -EINVAL;
 
-	ret = renoir_get_metrics_table(smu, &metrics);
+	ret = renoir_get_metrics_table(smu, &metrics, false);
 	if (ret)
 		return ret;
 
@@ -1018,7 +1024,7 @@ static ssize_t renoir_get_gpu_metrics(struct smu_context *smu,
 	SmuMetrics_t metrics;
 	int ret = 0;
 
-	ret = renoir_get_metrics_table(smu, &metrics);
+	ret = renoir_get_metrics_table(smu, &metrics, true);
 	if (ret)
 		return ret;
 
-- 
2.28.0