Re: [PATCH] drm/amdgpu: fix structurally dead code vcn_v2_5_hw_init
On 10/1/19 17:21, Liu, Leo wrote: OK. So, maybe we can add a comment pointing that out? >>> That could be better. >>> >> Great. I'm glad it's not a bug. I'll write a patch for that so other >> people don't waste time taking a look. > > Thanks, just sent two patches to add comment, and long with the patch to > make VCN ring ready properly. > Awesome. Thank you. I would just add a commit log to this patch: [PATCH 2/2] drm/amdgpu: add a comment to VCN 2.5 encode ring I'd update the subject to: drm/amdgpu: add code comment in vcn_v2_5_hw_init and add this as a commit log: Add a comment to VCN 2.5 encode ring Also, I think it's important to follow the process and CC all the people and lists below: $ scripts/get_maintainer.pl --nokeywords --nogit --nogit-fallback drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c Alex Deucher (supporter:RADEON and AMDGPU DRM DRIVERS) "Christian König" (supporter:RADEON and AMDGPU DRM DRIVERS) "David (ChunMing) Zhou" (supporter:RADEON and AMDGPU DRM DRIVERS) David Airlie (maintainer:DRM DRIVERS) Daniel Vetter (maintainer:DRM DRIVERS) amd-gfx@lists.freedesktop.org (open list:RADEON and AMDGPU DRM DRIVERS) dri-de...@lists.freedesktop.org (open list:DRM DRIVERS) linux-ker...@vger.kernel.org (open list) Thanks -- Gustavo
Re: [PATCH] drm/amdgpu: fix structurally dead code vcn_v2_5_hw_init
On 2019-10-01 5:57 p.m., Gustavo A. R. Silva wrote:
>
> On 10/1/19 16:46, Liu, Leo wrote:
>
> + 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?
>> Yes.
>>
> OK.
>
> 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 = >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?
>> That could be better.
>>
> Great. I'm glad it's not a bug. I'll write a patch for that so other
> people don't waste time taking a look.
Thanks, just sent two patches to add comment, and long with the patch to
make VCN ring ready properly.
Leo
>
> I appreciate your feedback.
> Thanks
> --
> Gustavo
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Re: [PATCH] drm/amdgpu: fix structurally dead code vcn_v2_5_hw_init
On 10/1/19 16:46, Liu, Leo wrote:
+ 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?
>
> Yes.
>
OK.
>
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 = >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?
>
> That could be better.
>
Great. I'm glad it's not a bug. I'll write a patch for that so other
people don't waste time taking a look.
I appreciate your feedback.
Thanks
--
Gustavo
Re: [PATCH] drm/amdgpu: fix structurally dead code vcn_v2_5_hw_init
On 2019-10-01 5:43 p.m., Gustavo A. R. Silva wrote:
> 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
>>> ---
>>>
>>> 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?
Yes.
>>> 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 = >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?
That could be better.
Thanks,
Leo
>
> 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 = >vcn.inst[j].ring_jpeg;
>>> + ring->sched.ready = true;
>>> r = amdgpu_ring_test_ring(ring);
>>> if (r) {
>>> ring->sched.ready = false;
Re: [PATCH] drm/amdgpu: fix structurally dead code vcn_v2_5_hw_init
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
>> ---
>>
>> 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 = >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 = >vcn.inst[j].ring_jpeg;
>> +ring->sched.ready = true;
>> r = amdgpu_ring_test_ring(ring);
>> if (r) {
>> ring->sched.ready = false;
Re: [PATCH] drm/amdgpu: fix structurally dead code vcn_v2_5_hw_init
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
> ---
>
> 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()
> 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 = >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.
Regards,
Leo
> 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 = >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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[PATCH] drm/amdgpu: fix structurally dead code vcn_v2_5_hw_init
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
---
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;
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 = >vcn.inst[j].ring_enc[i];
- ring->sched.ready = false;
- continue;
+ ring->sched.ready = true;
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 = >vcn.inst[j].ring_jpeg;
+ ring->sched.ready = true;
r = amdgpu_ring_test_ring(ring);
if (r) {
ring->sched.ready = false;
--
2.23.0
