[PATCH] drm/amd/pm: add fan abnormal detection

[Wang, Yang(Kevin)]

[AMD Official Use Only - AMD Internal Distribution Only]

Reviewed-by: Yang Wang <kevinyang.wang at amd.com>

Best Regards,
Kevin

-----Original Message-----
From: Kenneth Feng <kenneth.feng at amd.com>
Sent: Thursday, February 27, 2025 10:16
To: amd-gfx at lists.freedesktop.org
Cc: Wang, Yang(Kevin) <KevinYang.Wang at amd.com>; Feng, Kenneth <Kenneth.Feng at amd.com>
Subject: [PATCH] drm/amd/pm: add fan abnormal detection

add fan abnormal detection on smu v14.0.2&smu v14.0.3

Signed-off-by: Kenneth Feng <kenneth.feng at amd.com>
---
 .../gpu/drm/amd/pm/swsmu/smu14/smu_v14_0.c    | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0.c
index adbb6332376e..14a5760082b8 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0.c
@@ -950,6 +950,14 @@ static int smu_v14_0_irq_process(struct amdgpu_device *adev,
        uint32_t client_id = entry->client_id;
        uint32_t src_id = entry->src_id;

+       /*
+        * ctxid is used to distinguish different
+        * events for SMCToHost interrupt.
+        */
+       uint32_t ctxid = entry->src_data[0];
+       uint32_t data;
+       uint32_t high;
+
        if (client_id == SOC15_IH_CLIENTID_THM) {
                switch (src_id) {
                case THM_11_0__SRCID__THM_DIG_THERM_L2H:
@@ -964,6 +972,50 @@ static int smu_v14_0_irq_process(struct amdgpu_device *adev,
                                  src_id);
                        break;
                }
+       } else if (client_id == SOC15_IH_CLIENTID_MP1) {
+               if (src_id == SMU_IH_INTERRUPT_ID_TO_DRIVER) {
+                       /* ACK SMUToHost interrupt */
+                       data = RREG32_SOC15(MP1, 0, regMP1_SMN_IH_SW_INT_CTRL);
+                       data = REG_SET_FIELD(data, MP1_SMN_IH_SW_INT_CTRL, INT_ACK, 1);
+                       WREG32_SOC15(MP1, 0, regMP1_SMN_IH_SW_INT_CTRL, data);
+
+                       switch (ctxid) {
+                       case SMU_IH_INTERRUPT_CONTEXT_ID_FAN_ABNORMAL:
+                               high = smu->thermal_range.software_shutdown_temp +
+                                       smu->thermal_range.software_shutdown_temp_offset;
+                               high = min_t(typeof(high),
+                                            SMU_THERMAL_MAXIMUM_ALERT_TEMP,
+                                            high);
+                               dev_emerg(adev->dev, "Reduce soft CTF limit to %d (by an offset %d)\n",
+                                                       high,
+                                                       smu->thermal_range.software_shutdown_temp_offset);
+
+                               data = RREG32_SOC15(THM, 0, regTHM_THERMAL_INT_CTRL);
+                               data = REG_SET_FIELD(data, THM_THERMAL_INT_CTRL,
+                                                       DIG_THERM_INTH,
+                                                       (high & 0xff));
+                               data = data & (~THM_THERMAL_INT_CTRL__THERM_TRIGGER_MASK_MASK);
+                               WREG32_SOC15(THM, 0, regTHM_THERMAL_INT_CTRL, data);
+                               break;
+                       case SMU_IH_INTERRUPT_CONTEXT_ID_FAN_RECOVERY:
+                               high = min_t(typeof(high),
+                                            SMU_THERMAL_MAXIMUM_ALERT_TEMP,
+                                            smu->thermal_range.software_shutdown_temp);
+                               dev_emerg(adev->dev, "Recover soft CTF limit to %d\n", high);
+
+                               data = RREG32_SOC15(THM, 0, regTHM_THERMAL_INT_CTRL);
+                               data = REG_SET_FIELD(data, THM_THERMAL_INT_CTRL,
+                                                       DIG_THERM_INTH,
+                                                       (high & 0xff));
+                               data = data & (~THM_THERMAL_INT_CTRL__THERM_TRIGGER_MASK_MASK);
+                               WREG32_SOC15(THM, 0, regTHM_THERMAL_INT_CTRL, data);
+                               break;
+                       default:
+                               dev_dbg(adev->dev, "Unhandled context id %d from client:%d!\n",
+                                                                       ctxid, client_id);
+                               break;
+                       }
+               }
        }

        return 0;
--
2.34.1