[PATCH] drm/amd/pm: disable pcie speed switching on Intel platform for smu v14.0.2/3

Kenneth Feng kenneth.feng at amd.com
Mon Nov 18 08:01:14 UTC 2024


disable pcie speed switching on Intel platform for smu v14.0.2/3
based on Intel's requirement.

Signed-off-by: Kenneth Feng <kenneth.feng at amd.com>
---
 drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0_2_ppt.c | 8 ++++++++
 1 file changed, 8 insertions(+)

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 59b369eff30f..337d3312ef30 100644
--- 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
@@ -1472,6 +1472,14 @@ static int smu_v14_0_2_update_pcie_parameters(struct smu_context *smu,
 		if (pcie_table->pcie_lane[i] > pcie_width_cap)
 			pcie_table->pcie_lane[i] = pcie_width_cap;
 
+		if (i < pcie_table->num_of_link_levels - 1 &&
+			!(smu->adev->pm.pp_feature & PP_PCIE_DPM_MASK)) {
+			if (pcie_table->pcie_gen[i] < pcie_gen_cap)
+				pcie_table->pcie_gen[i] = pcie_gen_cap;
+			if (pcie_table->pcie_lane[i] < pcie_width_cap)
+				pcie_table->pcie_lane[i] = pcie_width_cap;
+		}
+
 		smu_pcie_arg = i << 16;
 		smu_pcie_arg |= pcie_table->pcie_gen[i] << 8;
 		smu_pcie_arg |= pcie_table->pcie_lane[i];
-- 
2.34.1



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