[PATCH 4/5] drm/amd/pm: change return value in aldebaran_get_power_limit()

[Kevin Wang]

1. change return value to avoid smu driver probe fails when FEATURE_PPT is
not enabled.
2. if FEATURE_PPT is not enabled, set power limit value to 0.

Signed-off-by: Kevin Wang <kevin1.wang at amd.com>
---
 .../gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c    | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c
index fd04391364ac..e00ac43515bb 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c
@@ -1194,8 +1194,19 @@ static int aldebaran_get_power_limit(struct smu_context *smu,
 	uint32_t power_limit = 0;
 	int ret;
 
-	if (!smu_cmn_feature_is_enabled(smu, SMU_FEATURE_PPT_BIT))
-		return -EINVAL;
+	if (!smu_cmn_feature_is_enabled(smu, SMU_FEATURE_PPT_BIT)) {
+		if (current_power_limit)
+			*current_power_limit = 0;
+		if (default_power_limit)
+			*default_power_limit = 0;
+		if (max_power_limit)
+			*max_power_limit = 0;
+
+		dev_err(smu->adev->dev,
+			"the PPT feature is not enabled, set power limit to 0");
+
+		return 0;
+	}
 
 	/* Valid power data is available only from primary die.
 	 * For secondary die show the value as 0.
-- 
2.25.1