drm/amd/pm: disable OD_FAN_CURVE if temp or pwm range invalid for smu v14

Forcibly disable the OD_FAN_CURVE feature when temperature or PWM range is invalid,
otherwise PMFW will reject this configuration on smu v14.0.2/14.0.3.

example:
$ sudo cat /sys/bus/pci/devices/<BDF>/gpu_od/fan_ctrl/fan_curve

OD_FAN_CURVE:
0: 0C 0%
1: 0C 0%
2: 0C 0%
3: 0C 0%
4: 0C 0%
OD_RANGE:
FAN_CURVE(hotspot temp): 0C 0C
FAN_CURVE(fan speed): 0% 0%

$ echo "0 50 40" | sudo tee fan_curve

kernel log:
[  969.761627] amdgpu 0000:03:00.0: amdgpu: Fan curve temp setting(50) must be within [0, 0]!
[ 1010.897800] amdgpu 0000:03:00.0: amdgpu: Fan curve temp setting(50) must be within [0, 0]!

Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0_2_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0_2_ppt.c
index 73762d9b5969e18e23131a36acfa06e555566313..c3ebfac062a7a54c89d22ee600bb1a7ece3a9dee 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0_2_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0_2_ppt.c
@@ -56,6 +56,10 @@
 
 #define to_amdgpu_device(x) (container_of(x, struct amdgpu_device, pm.smu_i2c))
 
+static void smu_v14_0_2_get_od_setting_limits(struct smu_context *smu,
+                                             int od_feature_bit,
+                                             int32_t *min, int32_t *max);
+
 static const struct smu_feature_bits smu_v14_0_2_dpm_features = {
        .bits = { SMU_FEATURE_BIT_INIT(FEATURE_DPM_GFXCLK_BIT),
                  SMU_FEATURE_BIT_INIT(FEATURE_DPM_UCLK_BIT),
@@ -922,8 +926,35 @@ static bool smu_v14_0_2_is_od_feature_supported(struct smu_context *smu,
        PPTable_t *pptable = smu->smu_table.driver_pptable;
        const OverDriveLimits_t * const overdrive_upperlimits =
                                &pptable->SkuTable.OverDriveLimitsBasicMax;
+       int32_t min_value, max_value;
+       bool feature_enabled;
 
-       return overdrive_upperlimits->FeatureCtrlMask & (1U << od_feature_bit);
+       switch (od_feature_bit) {
+       case PP_OD_FEATURE_FAN_CURVE_BIT:
+               feature_enabled = !!(overdrive_upperlimits->FeatureCtrlMask & (1U << od_feature_bit));
+               if (feature_enabled) {
+                       smu_v14_0_2_get_od_setting_limits(smu, PP_OD_FEATURE_FAN_CURVE_TEMP,
+                                                         &min_value, &max_value);
+                       if (!min_value && !max_value) {
+                               feature_enabled = false;
+                               goto out;
+                       }
+
+                       smu_v14_0_2_get_od_setting_limits(smu, PP_OD_FEATURE_FAN_CURVE_PWM,
+                                                         &min_value, &max_value);
+                       if (!min_value && !max_value) {
+                               feature_enabled = false;
+                               goto out;
+                       }
+               }
+               break;
+       default:
+               feature_enabled = !!(overdrive_upperlimits->FeatureCtrlMask & (1U << od_feature_bit));
+               break;
+       }
+
+out:
+       return feature_enabled;
 }
 
 static void smu_v14_0_2_get_od_setting_limits(struct smu_context *smu,