RE: drm/amdgpu/gfx9: change the reference clock for raven/raven2

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

[AMD Official Use Only - General]

 

Better to update the patch title with prefix as “drm/amdgpu:” instead of “drm/amdgpu/gfx9:”.

Either way, the patch is Reviewed-by: Evan Quan <evan.quan@xxxxxxx>

 

Evan

From: Zhang, Jesse(Jie) <Jesse.Zhang@xxxxxxx>
Sent: Wednesday, April 12, 2023 9:25 AM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx; Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Quan, Evan <Evan.Quan@xxxxxxx>; Zhang, Yifan <Yifan1.Zhang@xxxxxxx>
Subject: drm/amdgpu/gfx9: change the reference clock for raven/raven2

 

[AMD Official Use Only - General]

 

    Due to switch to golden tsc register to get clock counter for raven/ raven2.

    Chang the reference clock from 25MHZ to 100MHZ.

 

    Signed-off-by: Jesse Zhang  Jesse.Zhang@xxxxxxx

 

diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c

index 7d04c39332ad..0367a97c606b 100644

--- a/drivers/gpu/drm/amd/amdgpu/soc15.c

+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c

@@ -301,11 +301,10 @@ static u32 soc15_get_xclk(struct amdgpu_device *adev)

        u32 reference_clock = adev->clock.spll.reference_freq;

 

        if (adev->ip_versions[MP1_HWIP][0] == IP_VERSION(12, 0, 0) ||

-           adev->ip_versions[MP1_HWIP][0] == IP_VERSION(12, 0, 1))

-               return 10000;

-       if (adev->ip_versions[MP1_HWIP][0] == IP_VERSION(10, 0, 0) ||

+           adev->ip_versions[MP1_HWIP][0] == IP_VERSION(12, 0, 1) ||

+           adev->ip_versions[MP1_HWIP][0] == IP_VERSION(10, 0, 0) ||

            adev->ip_versions[MP1_HWIP][0] == IP_VERSION(10, 0, 1))

-               return reference_clock / 4;

+               return 10000;

 

        return reference_clock;

}