[PATCH] drm/amdgpu: fix gfx9 rlc modprobe rlcg program timeout issue

[Huang Rui]

On Tue, Apr 06, 2021 at 03:29:48PM +0800, Zhu, Changfeng wrote:
> From: changzhu <Changfeng.Zhu at amd.com>
> 
> From: Changfeng <Changfeng.Zhu at amd.com>
> 
> It needs to add amdgpu_sriov_fullaccess judgement as gfx_v10_rlcg_wreg
> when doing gfx_v9_0_rlcg_wreg.
> Or it will cause modprobe issue as below:
> kernel: [   59.992843] amdgpu: timeout: rlcg program reg:0x02984 failed!
> 
> Fix for patch:
> drm/amdgpu: indirect register access for nv12 sriov
> 
> Change-Id: I971804e4e8dbd83e4179beefa8ae8a06bd52913b
> Signed-off-by: Changfeng <Changfeng.Zhu at amd.com>

Acked-by: Huang Rui <ray.huang at amd.com>

> ---
>  drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> index 2111e4c46a52..06811a1f4625 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> @@ -734,7 +734,7 @@ static const u32 GFX_RLC_SRM_INDEX_CNTL_DATA_OFFSETS[] =
>  	mmRLC_SRM_INDEX_CNTL_DATA_7 - mmRLC_SRM_INDEX_CNTL_DATA_0,
>  };
>  
> -void gfx_v9_0_rlcg_wreg(struct amdgpu_device *adev, u32 offset, u32 v, u32 flag)
> +static void gfx_v9_0_rlcg_rw(struct amdgpu_device *adev, u32 offset, u32 v, u32 flag)
>  {
>  	static void *scratch_reg0;
>  	static void *scratch_reg1;
> @@ -787,6 +787,20 @@ void gfx_v9_0_rlcg_wreg(struct amdgpu_device *adev, u32 offset, u32 v, u32 flag)
>  
>  }
>  
> +static void gfx_v9_0_rlcg_wreg(struct amdgpu_device *adev, u32 offset, u32 v, u32 flag)
> +{
> +	if (amdgpu_sriov_fullaccess(adev)) {
> +		gfx_v9_0_rlcg_rw(adev, offset, v, flag);
> +
> +		return;
> +	}
> +
> +	if (flag & AMDGPU_REGS_NO_KIQ)
> +		WREG32_NO_KIQ(offset, v);
> +	else
> +		WREG32(offset, v);
> +}
> +
>  #define VEGA10_GB_ADDR_CONFIG_GOLDEN 0x2a114042
>  #define VEGA12_GB_ADDR_CONFIG_GOLDEN 0x24104041
>  #define RAVEN_GB_ADDR_CONFIG_GOLDEN 0x24000042
> -- 
> 2.17.1
>