[PATCH 1/5] drm/amdgpu: send msg to IMU for the front-door loading

[Quan, Evan]

[AMD Official Use Only - General]



> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of
> Xiaojian Du
> Sent: Thursday, July 28, 2022 3:04 PM
> To: amd-gfx at lists.freedesktop.org
> Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Huang, Tim
> <Tim.Huang at amd.com>; Du, Xiaojian <Xiaojian.Du at amd.com>; Zhang, Yifan
> <Yifan1.Zhang at amd.com>
> Subject: [PATCH 1/5] drm/amdgpu: send msg to IMU for the front-door
> loading
> 
> This patch will make SMU send msg to IMU for the front-door loading, it is
> required by some ASICs.
> 
> Signed-off-by: Yifan Zhang <yifan1.zhang at amd.com>
> Signed-off-by: Xiaojian Du <Xiaojian.Du at amd.com>
> ---
>  drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> index 6d9b3c6af164..79c01fa4b875 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
> @@ -1360,6 +1360,14 @@ static int smu_hw_init(void *handle)
>  		return ret;
>  	}
> 
> +	if (smu->ppt_funcs->set_gfx_power_up_by_imu) {
> +		ret = smu->ppt_funcs->set_gfx_power_up_by_imu(smu);
> +		if (ret) {
> +			dev_err(adev->dev, "Failed to Enable gfx imu!\n");
> +			return ret;
> +		}
> +	}
[Quan, Evan] Per my understandings, this should be needed by APU only. Can you move this under "smu->is_apu" control as other features below?

Evan
> +
>  	if (smu->is_apu) {
>  		smu_dpm_set_vcn_enable(smu, true);
>  		smu_dpm_set_jpeg_enable(smu, true);
> --
> 2.25.1