From 99830a1a242c97cb183169f4f103a33318ac6218 Mon Sep 17 00:00:00 2001
From: Lijo Lazar <lijo.lazar@amd.com>
Date: Fri, 22 Oct 2021 15:35:25 +0800
Subject: drm/amd/pm: Disable fan control if not supported
Git-commit: 47b67c9900db0db41e7a678bc0b2fc54983b6cb9
Patch-mainline: v5.16-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
On arcturus, not all platforms use PMFW based fan control. On such
ASICs fan control by PMFW will be disabled in PPTable. Disable hwmon
knobs for fan control also as it is not possible to report or control
fan speed on such platforms through driver.
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
index 082f01893f3d..fd1d30a93db5 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
@@ -436,6 +436,19 @@ static void arcturus_check_bxco_support(struct smu_context *smu)
}
}
+static void arcturus_check_fan_support(struct smu_context *smu)
+{
+ struct smu_table_context *table_context = &smu->smu_table;
+ PPTable_t *pptable = table_context->driver_pptable;
+
+ /* No sort of fan control possible if PPTable has it disabled */
+ smu->adev->pm.no_fan =
+ !(pptable->FeaturesToRun[0] & FEATURE_FAN_CONTROL_MASK);
+ if (smu->adev->pm.no_fan)
+ dev_info_once(smu->adev->dev,
+ "PMFW based fan control disabled");
+}
+
static int arcturus_check_powerplay_table(struct smu_context *smu)
{
struct smu_table_context *table_context = &smu->smu_table;
@@ -443,6 +456,7 @@ static int arcturus_check_powerplay_table(struct smu_context *smu)
table_context->power_play_table;
arcturus_check_bxco_support(smu);
+ arcturus_check_fan_support(smu);
table_context->thermal_controller_type =
powerplay_table->thermal_controller_type;
--
2.38.1