Hi,
On 10/1/19 16:29, Liu, Leo wrote:
>
> On 2019-10-01 1:16 p.m., Gustavo A. R. Silva wrote:
>> Notice that there is a *continue* statement in the middle of the
>> for loop and that prevents the code below from ever being reached:
>>
>> r = amdgpu_ring_test_ring(ring);
>> if (r) {
>> ring->sched.ready = false;
>> goto done;
>> }
>>
>> Fix this by removing the continue statement and updating ring->sched.ready
>> to true before calling amdgpu_ring_test_ring(ring).
>>
>> Notice that this fix is based on
>> commit 1b61de45dfaf ("drm/amdgpu: add initial VCN2.0 support (v2)")
>>
>> Addresses-Coverity-ID 1485608 ("Structurally dead code")
>> Fixes: 28c17d72072b ("drm/amdgpu: add VCN2.5 basic supports")
>> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
>> ---
>>
>> Any feedback is greatly appreciated.
>>
>> drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c | 5 +++--
>> 1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
>> index 395c2259f979..47b0dcd59e13 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c
>> @@ -258,6 +258,7 @@ static int vcn_v2_5_hw_init(void *handle)
>> adev->nbio_funcs->vcn_doorbell_range(adev, ring->use_doorbell,
>> ring->doorbell_index, j);
>>
>> + ring->sched.ready = true;
>
> This is redundant. all the sched->ready is initialized as true, please
> refer to drm_sched_init()
>
I see... so in the following commit 1b61de45dfaf ("drm/amdgpu: add initial VCN2.0 support (v2)")
that line is also redundant?
>
>> r = amdgpu_ring_test_ring(ring);
>> if (r) {
>> ring->sched.ready = false;
>> @@ -266,8 +267,7 @@ static int vcn_v2_5_hw_init(void *handle)
>>
>> for (i = 0; i < adev->vcn.num_enc_rings; ++i) {
>> ring = &adev->vcn.inst[j].ring_enc[i];
>> - ring->sched.ready = false;
>> - continue;
>> + ring->sched.ready = true;
>
> Because the VCN 2.5 FW still has issue for encode, so we have it
> disabled here.
>
OK. So, maybe we can add a comment pointing that out?
Thanks
--
Gustavo
>
>> r = amdgpu_ring_test_ring(ring);
>> if (r) {
>> ring->sched.ready = false;
>> @@ -276,6 +276,7 @@ static int vcn_v2_5_hw_init(void *handle)
>> }
>>
>> ring = &adev->vcn.inst[j].ring_jpeg;
>> + ring->sched.ready = true;
>> r = amdgpu_ring_test_ring(ring);
>> if (r) {
>> ring->sched.ready = false;
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