Re: [PATCH 10/21] drm/amdgpu: wire up emit_wreg for UVD v6

["Christian König" <ckoenig.leichtzumerken-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Am 16.01.2018 um 21:01 schrieb Alex Deucher:
> On Tue, Jan 16, 2018 at 2:40 PM, Christian König
> <ckoenig.leichtzumerken@gmail.com> wrote:
>> Needed for vm_flush unification.
>>
>> Signed-off-by: Christian König <christian.koenig@amd.com>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c | 12 ++++++++++++
>>   1 file changed, 12 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
>> index c6e22eff89e7..b48b843c66ae 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
>> @@ -1059,6 +1059,17 @@ static void uvd_v6_0_enc_ring_emit_ib(struct amdgpu_ring *ring,
>>          amdgpu_ring_write(ring, ib->length_dw);
>>   }
>>
>> +static void uvd_v6_0_ring_emit_wreg(struct amdgpu_ring *ring,
>> +                                   uint32_t reg, uint32_t val)
>> +{
>> +       amdgpu_ring_write(ring, PACKET0(mmUVD_GPCOM_VCPU_DATA0, 0));
>> +       amdgpu_ring_write(ring, reg << 2);
>> +       amdgpu_ring_write(ring, PACKET0(mmUVD_GPCOM_VCPU_DATA1, 0));
>> +       amdgpu_ring_write(ring, val);
>> +       amdgpu_ring_write(ring, PACKET0(mmUVD_GPCOM_VCPU_CMD, 0));
>> +       amdgpu_ring_write(ring, 0x8);
> Is this valid on UVD6?

This is valid on the decode ring of UVD6, only the HEVC UVD6 encode and 
VCE3 rings use different commands.

>    I think this may be a UVD7 thing.  Looking at
> the other UVD code, I think we just want:
>          amdgpu_ring_write(ring, PACKET0(reg, 0));
>          amdgpu_ring_write(ring, val);

IIRC that won't work. The UVD RBC can only write to UVD registers using 
the PACKET0 command.

Regards,
Christian.

>
> Alex
>
>
>> +}
>> +
>>   static void uvd_v6_0_ring_emit_vm_flush(struct amdgpu_ring *ring,
>>                                          unsigned vmid, unsigned pasid,
>>                                          uint64_t pd_addr)
>> @@ -1595,6 +1606,7 @@ static const struct amdgpu_ring_funcs uvd_v6_0_ring_vm_funcs = {
>>          .pad_ib = amdgpu_ring_generic_pad_ib,
>>          .begin_use = amdgpu_uvd_ring_begin_use,
>>          .end_use = amdgpu_uvd_ring_end_use,
>> +       .emit_wreg = uvd_v6_0_ring_emit_wreg,
>>   };
>>
>>   static const struct amdgpu_ring_funcs uvd_v6_0_enc_ring_vm_funcs = {
>> --
>> 2.14.1
>>
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>> amd-gfx@lists.freedesktop.org
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