From: Asad Kamal <asad.kamal@amd.com>
Date: Wed, 18 Mar 2026 05:48:30 +0000 (+0800)
Subject: drm/amd/pm: Skip redundant UCLK restore in smu_v13_0_6
X-Git-Tag: v7.0-rc6~19^2~4^2~8
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cdbc3b62cfc2785da32b82260f852370cc1f2a6a;p=thirdparty%2Flinux.git

drm/amd/pm: Skip redundant UCLK restore in smu_v13_0_6

Only reapply UCLK soft limits during PP_OD_RESTORE_DEFAULT when the
current max differs from the DPM table max. This avoids redundant
SMC updates and prevents -EINVAL on restore when no change is needed.

Fixes: b7a900344546 ("drm/amd/pm: Allow setting max UCLK on SMU v13.0.6")
Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 17f11bbbc76c8e83c8474ea708316b1e3631d927)
---

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
index 896b51c8a9a7..b44a85697a30 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
@@ -2122,6 +2122,7 @@ static int smu_v13_0_6_usr_edit_dpm_table(struct smu_context *smu,
 {
 	struct smu_dpm_context *smu_dpm = &(smu->smu_dpm);
 	struct smu_13_0_dpm_context *dpm_context = smu_dpm->dpm_context;
+	struct smu_dpm_table *uclk_table = &dpm_context->dpm_tables.uclk_table;
 	struct smu_umd_pstate_table *pstate_table = &smu->pstate_table;
 	uint32_t min_clk;
 	uint32_t max_clk;
@@ -2221,14 +2222,16 @@ static int smu_v13_0_6_usr_edit_dpm_table(struct smu_context *smu,
 			if (ret)
 				return ret;
 
-			min_clk = SMU_DPM_TABLE_MIN(
-				&dpm_context->dpm_tables.uclk_table);
-			max_clk = SMU_DPM_TABLE_MAX(
-				&dpm_context->dpm_tables.uclk_table);
-			ret = smu_v13_0_6_set_soft_freq_limited_range(
-				smu, SMU_UCLK, min_clk, max_clk, false);
-			if (ret)
-				return ret;
+			if (SMU_DPM_TABLE_MAX(uclk_table) !=
+			    pstate_table->uclk_pstate.curr.max) {
+				min_clk = SMU_DPM_TABLE_MIN(&dpm_context->dpm_tables.uclk_table);
+				max_clk = SMU_DPM_TABLE_MAX(&dpm_context->dpm_tables.uclk_table);
+				ret = smu_v13_0_6_set_soft_freq_limited_range(smu,
+									      SMU_UCLK, min_clk,
+									      max_clk, false);
+				if (ret)
+					return ret;
+			}
 			smu_v13_0_reset_custom_level(smu);
 		}
 		break;