From 7452a8753f71c94a2b55471d376579fc2d439bbd Mon Sep 17 00:00:00 2001
From: Evan Quan <evan.quan@amd.com>
Date: Fri, 22 May 2020 15:42:40 +0800
Subject: drm/amd/powerplay: enable thermal throttling logging support V2
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Git-commit: bcdc7c05bd2dd8fa8afbd725110d5ec3075d4b42
Patch-mainline: v5.9-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322

Currently this feature is supported on Arcturus only. PMFW will
interrupt driver the first time when thermal throttling happened
and every one second afterwards if the throttling continuing. On
receiving the 1st interrupt, driver logs it the first time. However,
if the throttling continues, the logging will be performed every
minute to avoid log flooding.

V2: simplify the implemention by ratelimited printk

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/powerplay/smu_v11_0.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
index 415ccb752981..92cb7924524d 100644
--- a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
+++ b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
@@ -1524,6 +1524,7 @@ static int smu_v11_0_irq_process(struct amdgpu_device *adev,
 				 struct amdgpu_irq_src *source,
 				 struct amdgpu_iv_entry *entry)
 {
+	struct smu_context *smu = &adev->smu;
 	uint32_t client_id = entry->client_id;
 	uint32_t src_id = entry->src_id;
 	/*
@@ -1532,6 +1533,11 @@ static int smu_v11_0_irq_process(struct amdgpu_device *adev,
 	 */
 	uint32_t ctxid = entry->src_data[0];
 	uint32_t data;
+	/*
+	 * if the throttling continues, the logging will be performed every
+	 * minute to avoid log flooding.
+	 */
+	static DEFINE_RATELIMIT_STATE(ratelimit_state, 60 * HZ, 1);
 
 	if (client_id == SOC15_IH_CLIENTID_THM) {
 		switch (src_id) {
@@ -1575,6 +1581,11 @@ static int smu_v11_0_irq_process(struct amdgpu_device *adev,
 				dev_dbg(adev->dev, "Switched to DC mode!\n");
 				smu_v11_0_ack_ac_dc_interrupt(&adev->smu);
 				break;
+			case 0x7:
+				if (__ratelimit(&ratelimit_state))
+					smu_log_thermal_throttling(smu);
+
+				break;
 			}
 		}
 	}
-- 
2.29.2