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drm/amd/pm: avoid driver getting empty metrics table for the first time

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add metrics.AccumulationCouter check to avoid driver getting an empty
metrics data since metrics table not updated completely in pmfw side.

Signed-off-by: Yang Wang <KevinYang.Wang@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Tested-by: Asad Kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yang Wang 2023-05-30 17:08:08 +08:00 committed by Alex Deucher
parent bd6040b0ea
commit e01eeffc3f
1 changed files with 15 additions and 5 deletions
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20
drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
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@ -325,14 +325,24 @@ static int smu_v13_0_6_setup_driver_pptable(struct smu_context *smu)
MetricsTable_t *metrics = (MetricsTable_t *)smu_table->metrics_table;
struct PPTable_t *pptable =
(struct PPTable_t *)smu_table->driver_pptable;
int ret;
int i;
int ret, i, retry = 100;
/* Store one-time values in driver PPTable */
if (!pptable->Init) {
ret = smu_v13_0_6_get_metrics_table(smu, NULL, false);
if (ret)
return ret;
while (retry--) {
ret = smu_v13_0_6_get_metrics_table(smu, NULL, true);
if (ret)
return ret;
/* Ensure that metrics have been updated */
if (metrics->AccumulationCounter)
break;
usleep_range(1000, 1100);
}
if (!retry)
return -ETIME;
pptable->MaxSocketPowerLimit =
SMUQ10_TO_UINT(metrics->MaxSocketPowerLimit);