RE: [PATCH] drm/amdgpu/pm/smu11: fix static fan speed readback

["Quan, Evan" <Evan.Quan@xxxxxxx>]

[AMD Official Use Only - Internal Distribution Only]

Actually after switching to retrieve fan speed from metrics table always, this API is not used any more.
Maybe we can just drop it. Either way the patch is reviewed-by: Evan Quan <evan.quan@xxxxxxx>

BR
Evan
-----Original Message-----
From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Alex Deucher
Sent: Wednesday, January 27, 2021 2:17 AM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>
Subject: [PATCH] drm/amdgpu/pm/smu11: fix static fan speed readback

The xclk needs to be divided by 4.

Fixes: acab02c1af43d3 ("drm/amdgpu/pm/smu11: Fix fan set speed bug")
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
 drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
index 147efe12973c..36dac106ed4b 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
@@ -1245,7 +1245,11 @@ int smu_v11_0_get_fan_speed_rpm(struct smu_context *smu,
 if (!tach_period)
 return -EINVAL;

-crystal_clock_freq = amdgpu_asic_get_xclk(adev);
+/*
+ * crystal_clock_freq div by 4 is required since the fan control
+ * module refers to 25MHz
+ */
+crystal_clock_freq = amdgpu_asic_get_xclk(adev) / 4;

 tmp64 = (uint64_t)crystal_clock_freq * 60 * 10000;
 do_div(tmp64, (tach_period * 8));
--
2.29.2

_______________________________________________
amd-gfx mailing list
amd-gfx@xxxxxxxxxxxxxxxxxxxxx
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.freedesktop.org%2Fmailman%2Flistinfo%2Famd-gfx&amp;data=04%7C01%7Cevan.quan%40amd.com%7C4f685f8c77d040728b3608d8c226a209%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637472818479610219%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Ri7h4UWgkSGOtQNa982bK9vAhUuvyOkhLOADurh3YYg%3D&amp;reserved=0
_______________________________________________
amd-gfx mailing list
amd-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/amd-gfx