[PATCH 1/2] drm/amd/pm: enable baco reset for Hawaii

[Sandeep]

On Tue, 27 Oct 2020 at 17:04, Sandeep <sandy.8925 at gmail.com> wrote:
>
>
>
> On Tue, 27 Oct, 2020, 17:01 Sandeep, <sandy.8925 at gmail.com> wrote:
>>
>>
>> On Tue, 27 Oct, 2020, 08:10 Evan Quan, <evan.quan at amd.com> wrote:
>>>
>>> Which can be used for S4(hibernation) support.
>>>
>>> Change-Id: I6e4962c120a3baed14cea04ed1742ff11a273d34
>>> Signed-off-by: Evan Quan <evan.quan at amd.com>
>>> ---
>>>  drivers/gpu/drm/amd/amdgpu/cik.c                 | 4 +++-
>>>  drivers/gpu/drm/amd/pm/powerplay/hwmgr/ci_baco.c | 7 ++++---
>>>  2 files changed, 7 insertions(+), 4 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/cik.c b/drivers/gpu/drm/amd/amdgpu/cik.c
>>> index 03ff8bd1fee8..5442df094102 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/cik.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/cik.c
>>> @@ -1336,11 +1336,13 @@ cik_asic_reset_method(struct amdgpu_device *adev)
>>>
>>>         switch (adev->asic_type) {
>>>         case CHIP_BONAIRE:
>>> -       case CHIP_HAWAII:
>>>                 /* disable baco reset until it works */
>>>                 /* smu7_asic_get_baco_capability(adev, &baco_reset); */
>>>                 baco_reset = false;
>>>                 break;
>>> +       case CHIP_HAWAII:
>>> +               baco_reset = cik_asic_supports_baco(adev);
>>> +               break;
>>>         default:
>>>                 baco_reset = false;
>>>                 break;
>>> diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ci_baco.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ci_baco.c
>>> index 3be40114e63d..45f608838f6e 100644
>>> --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ci_baco.c
>>> +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ci_baco.c
>>> @@ -142,12 +142,12 @@ static const struct baco_cmd_entry exit_baco_tbl[] =
>>>         { CMD_READMODIFYWRITE, mmBACO_CNTL, BACO_CNTL__BACO_BCLK_OFF_MASK,           BACO_CNTL__BACO_BCLK_OFF__SHIFT, 0, 0x00 },
>>>         { CMD_READMODIFYWRITE, mmBACO_CNTL, BACO_CNTL__BACO_POWER_OFF_MASK,          BACO_CNTL__BACO_POWER_OFF__SHIFT, 0, 0x00 },
>>>         { CMD_DELAY_MS, 0, 0, 0, 20, 0 },
>>> -       { CMD_WAITFOR, mmBACO_CNTL, BACO_CNTL__PWRGOOD_BF_MASK, 0, 0xffffffff, 0x20 },
>>> +       { CMD_WAITFOR, mmBACO_CNTL, BACO_CNTL__PWRGOOD_BF_MASK, 0, 0xffffffff, 0x200 },
>>>         { CMD_READMODIFYWRITE, mmBACO_CNTL, BACO_CNTL__BACO_ISO_DIS_MASK, BACO_CNTL__BACO_ISO_DIS__SHIFT, 0, 0x01 },
>>> -       { CMD_WAITFOR, mmBACO_CNTL, BACO_CNTL__PWRGOOD_MASK, 0, 5, 0x1c },
>>> +       { CMD_WAITFOR, mmBACO_CNTL, BACO_CNTL__PWRGOOD_MASK, 0, 5, 0x1c00 },
>>>         { CMD_READMODIFYWRITE, mmBACO_CNTL, BACO_CNTL__BACO_ANA_ISO_DIS_MASK, BACO_CNTL__BACO_ANA_ISO_DIS__SHIFT, 0, 0x01 },
>>>         { CMD_READMODIFYWRITE, mmBACO_CNTL, BACO_CNTL__BACO_RESET_EN_MASK, BACO_CNTL__BACO_RESET_EN__SHIFT, 0, 0x00 },
>>> -       { CMD_WAITFOR, mmBACO_CNTL, BACO_CNTL__RCU_BIF_CONFIG_DONE_MASK, 0, 5, 0x10 },
>>> +       { CMD_WAITFOR, mmBACO_CNTL, BACO_CNTL__RCU_BIF_CONFIG_DONE_MASK, 0, 5, 0x100 },
>>>         { CMD_READMODIFYWRITE, mmBACO_CNTL, BACO_CNTL__BACO_EN_MASK, BACO_CNTL__BACO_EN__SHIFT, 0, 0x00 },
>>>         { CMD_WAITFOR, mmBACO_CNTL, BACO_CNTL__BACO_MODE_MASK, 0, 0xffffffff, 0x00 }
>>>  };
>>> @@ -155,6 +155,7 @@ static const struct baco_cmd_entry exit_baco_tbl[] =
>>>  static const struct baco_cmd_entry clean_baco_tbl[] =
>>>  {
>>>         { CMD_WRITE, mmBIOS_SCRATCH_6, 0, 0, 0, 0 },
>>> +       { CMD_WRITE, mmBIOS_SCRATCH_7, 0, 0, 0, 0 },
>>>         { CMD_WRITE, mmCP_PFP_UCODE_ADDR, 0, 0, 0, 0 }
>>>  };
>>>
>>> --
>>> 2.29.0
>>
>>
>>
>> Not sure why I'm cc'd on this, I'm not a maintainer, nor does this patch seem related to any patches I've contributed.
>>
>> - Sandeep
>
>
> Ok, I just saw the other email. I'll try testing the patch and see if it fixes the hibernation bug.
>
> - Sandeep

I tested and while suspend works correctly, hibernation is completely
broken. The system fails to resume from hibernation which is much
worse than before.

- Sandeep