[PATCH] drm/amd/powerplay: clear VBIOS scratchs on baco exit V2

[Alex Deucher]

On Sun, Dec 8, 2019 at 8:42 PM Evan Quan <evan.quan at amd.com> wrote:
>
> This is needed for coming asic init on performing gpu reset.
>
> V2: use non-asic specific programing way
>
> Change-Id: If3671a24d239e3d288665fadaa2c40c87d5da40b
> Signed-off-by: Evan Quan <evan.quan at amd.com>

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/amd/powerplay/smu_v11_0.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
> index f5469ad43929..7781d245f8ef 100644
> --- a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
> +++ b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
> @@ -1676,10 +1676,17 @@ int smu_v11_0_baco_set_state(struct smu_context *smu, enum smu_baco_state state)
>                 }
>         } else {
>                 ret = smu_send_smc_msg(smu, SMU_MSG_ExitBaco);
> +               if (ret)
> +                       goto out;
> +
>                 bif_doorbell_intr_cntl = REG_SET_FIELD(bif_doorbell_intr_cntl,
>                                                 BIF_DOORBELL_INT_CNTL,
>                                                 DOORBELL_INTERRUPT_DISABLE, 0);
>                 WREG32_SOC15(NBIO, 0, mmBIF_DOORBELL_INT_CNTL, bif_doorbell_intr_cntl);
> +
> +               /* clear vbios scratch 6 and 7 for coming asic reinit */
> +               WREG32(adev->bios_scratch_reg_offset + 6, 0);
> +               WREG32(adev->bios_scratch_reg_offset + 7, 0);
>         }
>         if (ret)
>                 goto out;
> --
> 2.24.0
>
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