On 1/25/2024 8:52 AM, Prike Liang wrote:
> In the pm abort case the gfx power rail not turn off from FCH side and
> this will lead to the gfx reinitialized failed base on the unknown gfx
> HW status, so let's reset the gpu to a known good power state.
>
>From the description, this an APU only problem (or this patch could only
resolve APU abort sequence). However, there is no check for APU in the
patch below.
> Signed-off-by: Prike Liang <Prike.Liang@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 +++++
> drivers/gpu/drm/amd/amdgpu/soc15.c | 8 +++++++-
> 2 files changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 56d9dfa61290..4c40ffaaa5c2 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -4627,6 +4627,11 @@ int amdgpu_device_resume(struct drm_device *dev, bool fbcon)
> return r;
> }
>
> + if(amdgpu_asic_need_reset_on_init(adev)) {
> + DRM_INFO("PM abort case and let's reset asic \n");
> + amdgpu_asic_reset(adev);
> + }
> +
suspend_noirq is specific for suspend scenarios and not valid for
freeze/thaw. I guess this could trigger reset for successful restore on
APUs.
> if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
> return 0;
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
> index 15033efec2ba..9329a00b6abc 100644
> --- a/drivers/gpu/drm/amd/amdgpu/soc15.c
> +++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
> @@ -804,9 +804,16 @@ static bool soc15_need_reset_on_init(struct amdgpu_device *adev)
> if (adev->asic_type == CHIP_RENOIR)
> return true;
>
> + sol_reg = RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_81);
> +
> /* Just return false for soc15 GPUs. Reset does not seem to
> * be necessary.
> */
The comment now doesn't make sense.
Thanks,
Lijo
> + if (adev->in_suspend && !adev->in_s0ix &&
> + !adev->pm_complete &&
> + sol_reg)
> + return true;
> +
> if (!amdgpu_passthrough(adev))
> return false;
>
> @@ -816,7 +823,6 @@ static bool soc15_need_reset_on_init(struct amdgpu_device *adev)
> /* Check sOS sign of life register to confirm sys driver and sOS
> * are already been loaded.
> */
> - sol_reg = RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_81);
> if (sol_reg)
> return true;
>
