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drm/amd: Disable MES LR compute W/A

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A workaround was introduced in commit 1fb710793c ("drm/amdgpu: Enable
MES lr_compute_wa by default") to help with some hangs observed in gfx1151.

This WA didn't fully fix the issue.  It was actually fixed by adjusting
the VGPR size to the correct value that matched the hardware in commit
b42f3bf953 ("drm/amdkfd: bump minimum vgpr size for gfx1151").

There are reports of instability on other products with newer GC microcode
versions, and I believe they're caused by this workaround. As we don't
need the workaround any more, remove it.

Fixes: b42f3bf953 ("drm/amdkfd: bump minimum vgpr size for gfx1151")
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 9973e64bd6ee7642860a6f3b6958cbf14e89cabd)
Cc: stable@vger.kernel.org
This commit is contained in:
Mario Limonciello
2026-02-25 10:51:16 -06:00
committed by Alex Deucher
parent b57c4ec98c
commit 6b0d812971
2 changed files with 0 additions and 10 deletions
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5
drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
View File

@@ -720,11 +720,6 @@ static int mes_v11_0_set_hw_resources(struct amdgpu_mes *mes)
mes_set_hw_res_pkt.enable_reg_active_poll = 1;
mes_set_hw_res_pkt.enable_level_process_quantum_check = 1;
mes_set_hw_res_pkt.oversubscription_timer = 50;
if ((mes->adev->mes.sched_version & AMDGPU_MES_VERSION_MASK) >= 0x7f)
mes_set_hw_res_pkt.enable_lr_compute_wa = 1;
else
dev_info_once(mes->adev->dev,
"MES FW version must be >= 0x7f to enable LR compute workaround.\n");
if (amdgpu_mes_log_enable) {
mes_set_hw_res_pkt.enable_mes_event_int_logging = 1;

5
drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
View File

@@ -779,11 +779,6 @@ static int mes_v12_0_set_hw_resources(struct amdgpu_mes *mes, int pipe)
mes_set_hw_res_pkt.use_different_vmid_compute = 1;
mes_set_hw_res_pkt.enable_reg_active_poll = 1;
mes_set_hw_res_pkt.enable_level_process_quantum_check = 1;
if ((mes->adev->mes.sched_version & AMDGPU_MES_VERSION_MASK) >= 0x82)
mes_set_hw_res_pkt.enable_lr_compute_wa = 1;
else
dev_info_once(adev->dev,
"MES FW version must be >= 0x82 to enable LR compute workaround.\n");
/*
* Keep oversubscribe timer for sdma . When we have unmapped doorbell