releases/6.12.44/drm-amdgpu-swm14-update-power-limit-logic.patch

From 79e25cd06e85105c75701ef1773c6c64bb304091 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 8 Aug 2025 13:12:07 -0400
Subject: drm/amdgpu/swm14: Update power limit logic

From: Alex Deucher <alexander.deucher@amd.com>

commit 79e25cd06e85105c75701ef1773c6c64bb304091 upstream.

Take into account the limits from the vbios.  Ported
from the SMU13 code.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4352
Reviewed-by: Jesse Zhang <Jesse.Zhang@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 203cc7f1dd86f2c8de5c3c6182f19adac7c9c206)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0_2_ppt.c |   30 +++++++++++++++----
 1 file changed, 25 insertions(+), 5 deletions(-)

--- 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
@@ -1668,9 +1668,11 @@ static int smu_v14_0_2_get_power_limit(s
 				       uint32_t *min_power_limit)
 {
 	struct smu_table_context *table_context = &smu->smu_table;
+	struct smu_14_0_2_powerplay_table *powerplay_table =
+		table_context->power_play_table;
 	PPTable_t *pptable = table_context->driver_pptable;
 	CustomSkuTable_t *skutable = &pptable->CustomSkuTable;
-	uint32_t power_limit;
+	uint32_t power_limit, od_percent_upper = 0, od_percent_lower = 0;
 	uint32_t msg_limit = pptable->SkuTable.MsgLimits.Power[PPT_THROTTLER_PPT0][POWER_SOURCE_AC];
 
 	if (smu_v14_0_get_current_power_limit(smu, &power_limit))
@@ -1683,11 +1685,29 @@ static int smu_v14_0_2_get_power_limit(s
 	if (default_power_limit)
 		*default_power_limit = power_limit;
 
-	if (max_power_limit)
-		*max_power_limit = msg_limit;
+	if (powerplay_table) {
+		if (smu->od_enabled &&
+		    smu_v14_0_2_is_od_feature_supported(smu, PP_OD_FEATURE_PPT_BIT)) {
+			od_percent_upper = pptable->SkuTable.OverDriveLimitsBasicMax.Ppt;
+			od_percent_lower = pptable->SkuTable.OverDriveLimitsBasicMin.Ppt;
+		} else if (smu_v14_0_2_is_od_feature_supported(smu, PP_OD_FEATURE_PPT_BIT)) {
+			od_percent_upper = 0;
+			od_percent_lower = pptable->SkuTable.OverDriveLimitsBasicMin.Ppt;
+		}
+	}
 
-	if (min_power_limit)
-		*min_power_limit = 0;
+	dev_dbg(smu->adev->dev, "od percent upper:%d, od percent lower:%d (default power: %d)\n",
+					od_percent_upper, od_percent_lower, power_limit);
+
+	if (max_power_limit) {
+		*max_power_limit = msg_limit * (100 + od_percent_upper);
+		*max_power_limit /= 100;
+	}
+
+	if (min_power_limit) {
+		*min_power_limit = power_limit * (100 + od_percent_lower);
+		*min_power_limit /= 100;
+	}
 
 	return 0;
 }