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drm/amd/display: Disable mem gating for DCHVM on DCHVM init

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[Why] Hang occurs with global gating enabled if req=1

Reviewed-by: Leo Chen <leo.chen@amd.com>
Signed-off-by: Andrew Lichmanov <Andrew.Lichmanov@amd.com>
Signed-off-by: George Zhang <george.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Andrew Lichmanov
2026-06-19 15:04:15 -04:00
committed by Alex Deucher
parent 1cc0fbdd95
commit 94b9b67fec
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/dc/hubbub/dcn35/dcn35_hubbub.c
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@@ -571,7 +571,7 @@ void dcn35_dchvm_init(struct hubbub *hubbub)
if (riommu_active) {
// Disable gating and memory power requests
REG_UPDATE(DCHVM_MEM_CTRL, HVM_GPUVMRET_PWR_REQ_DIS, 1);
REG_UPDATE_2(DCHVM_MEM_CTRL, HVM_GPUVMRET_PWR_REQ_DIS, 1, HVM_GPUVMRET_FORCE_REQ, 0);
REG_UPDATE_4(DCHVM_CLK_CTRL,
HVM_DISPCLK_R_GATE_DIS, 1,
HVM_DISPCLK_G_GATE_DIS, 1,