[PATCH] drm/admgpu: Set reference clock to 100Mhz on Renoir (v2)

[PATCH] drm/admgpu: Set reference clock to 100Mhz on Renoir (v2)

[Alex Deucher]

Fixes the rlc reference clock used for GPU timestamps.
Value is 100Mhz.  Confirmed with hardware team.

v2: reword commit message.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1480
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/soc15.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index c7d0e0e98391..230caaa3513f 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -463,6 +463,8 @@ static u32 soc15_get_xclk(struct amdgpu_device *adev)
 {
 	u32 reference_clock = adev->clock.spll.reference_freq;
 
+	if (adev->asic_type == CHIP_RENOIR)
+		return 10000;
 	if (adev->asic_type == CHIP_RAVEN)
 		return reference_clock / 4;
 
-- 
2.29.2

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Re: [PATCH] drm/admgpu: Set reference clock to 100Mhz on Renoir (v2)

[Christian König]

Am 17.02.21 um 23:20 schrieb Alex Deucher:
> Fixes the rlc reference clock used for GPU timestamps.
> Value is 100Mhz.  Confirmed with hardware team.
>
> v2: reword commit message.
>
> Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1480
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Acked-by: Christian König <christian.koenig@amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/soc15.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
> index c7d0e0e98391..230caaa3513f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/soc15.c
> +++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
> @@ -463,6 +463,8 @@ static u32 soc15_get_xclk(struct amdgpu_device *adev)
>   {
>   	u32 reference_clock = adev->clock.spll.reference_freq;
>   
> +	if (adev->asic_type == CHIP_RENOIR)
> +		return 10000;
>   	if (adev->asic_type == CHIP_RAVEN)
>   		return reference_clock / 4;
>   

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