[PATCH 2/2] drm/amdgpu: Configure doorbell to maximum slots

[Alex Deucher]

On Wed, Jun 24, 2015 at 3:46 PM, Oded Gabbay <oded.gabbay at gmail.com> wrote:
> On Wed, Jun 24, 2015 at 10:06 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
>> On Fri, Jun 12, 2015 at 4:08 AM, Oded Gabbay <oded.gabbay at gmail.com> wrote:
>>> From: Ben Goz <ben.goz at amd.com>
>>>
>>> Signed-off-by: Ben Goz <ben.goz at amd.com>
>>> Acked-by: Oded Gabbay <oded.gabbay at amd.com>
>>
>> This patch effectively reverts a fix for a hw bug IIRC.
>>
>> Alex
> Hmm, let's see what Ben says about this. To which H/W bug are you referring ?

Nevermind, it was a tonga bug which is handled by a separate code
path.  Patch applied.

Alex

>
>        Oded
>>
>>> ---
>>>  drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
>>> index e4aeb74..7683d7f 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
>>> @@ -3128,7 +3128,7 @@ static int gfx_v8_0_cp_compute_resume(struct amdgpu_device *adev)
>>>                                 WREG32(mmCP_MEC_DOORBELL_RANGE_LOWER,
>>>                                        AMDGPU_DOORBELL_KIQ << 2);
>>>                                 WREG32(mmCP_MEC_DOORBELL_RANGE_UPPER,
>>> -                                      AMDGPU_DOORBELL_MEC_RING7 << 2);
>>> +                                               0x7FFFF << 2);
>>>                         }
>>>                         tmp = RREG32(mmCP_HQD_PQ_DOORBELL_CONTROL);
>>>                         tmp = REG_SET_FIELD(tmp, CP_HQD_PQ_DOORBELL_CONTROL,
>>> --
>>> 2.4.3
>>>