[PATCH v3 1/6] drm/amd/display: Use DRM new-style object iterators.

[Andrey Grodzovsky]

On 10/13/2017 05:01 PM, Leo wrote:
>
>
> On 2017-10-13 04:36 PM, Andrey Grodzovsky wrote:
>>
>>
>> On 10/13/2017 03:29 PM, sunpeng.li at amd.com wrote:
>>> From: "Leo (Sunpeng) Li" <sunpeng.li at amd.com>
>>>
>>> Use the correct for_each_new/old_* iterators instead of for_each_*
>>>
>>> The following functions were considered:
>>>
>>> amdgpu_dm_find_first_crtc_matching_connector: use for_each_new
>>>      - Old from_state_var flag was always choosing the new state
>>>
>>> amdgpu_dm_display_resume: use for_each_new
>>>      - drm_atomic_helper_duplicate_state is called during suspend to
>>>        cache the state
>>>      - It sets 'state' within the state triplet to 'new_state'
>>>
>>> amdgpu_dm_commit_planes: use for_each_old
>>>      - Called after the state was swapped (via atomic commit tail)
>>>
>>> amdgpu_dm_atomic_commit: use for_each_new
>>>      - Called before the state is swapped
>>>
>>> amdgpu_dm_atomic_commit_tail: use for_each_old
>>>      - Called after the state was swapped
>>>
>>> dm_update_crtcs_state: use for_each_new
>>>      - Called before the state is swapped (via atomic check)
>>>
>>> amdgpu_dm_atomic_check: use for_each_new
>>>      - Called before the state is swapped
>>>
>>> v2: Split out typo fixes to a new patch.
>>>
>>> v3: Say "functions considered" instead of "affected functions". The
>>>      latter implies that changes are made to each.
>>>
>>> Signed-off-by: Leo (Sunpeng) Li <sunpeng.li at amd.com>
>>> ---
>>>   drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 32 
>>> ++++++++---------------
>>>   drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  3 +--
>>>   2 files changed, 12 insertions(+), 23 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c 
>>> b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>>> index 9bfe1f9..cc024ab 100644
>>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>>> @@ -570,23 +570,15 @@ static int dm_suspend(void *handle)
>>>   struct amdgpu_dm_connector 
>>> *amdgpu_dm_find_first_crct_matching_connector(
>>>       struct drm_atomic_state *state,
>>> -    struct drm_crtc *crtc,
>>> -    bool from_state_var)
>>> +    struct drm_crtc *crtc)
>>>   {
>>>       uint32_t i;
>>>       struct drm_connector_state *conn_state;
>>>       struct drm_connector *connector;
>>>       struct drm_crtc *crtc_from_state;
>>> -    for_each_new_connector_in_state(
>>> -        state,
>>> -        connector,
>>> -        conn_state,
>>> -        i) {
>>> -        crtc_from_state =
>>> -            from_state_var ?
>>> -                conn_state->crtc :
>>> -                connector->state->crtc;
>>> +    for_each_new_connector_in_state(state, connector, conn_state, i) {
>>> +        crtc_from_state = conn_state->crtc;
>>>           if (crtc_from_state == crtc)
>>>               return to_amdgpu_dm_connector(connector);
>>> @@ -3890,7 +3882,7 @@ static void amdgpu_dm_commit_planes(struct 
>>> drm_atomic_state *state,
>>>       unsigned long flags;
>>>       /* update planes when needed */
>>> -    for_each_new_plane_in_state(state, plane, old_plane_state, i) {
>>> +    for_each_old_plane_in_state(state, plane, old_plane_state, i) {
>>>           struct drm_plane_state *plane_state = plane->state;
>>>           struct drm_crtc *crtc = plane_state->crtc;
>>>           struct drm_framebuffer *fb = plane_state->fb;
>>> @@ -4024,7 +4016,7 @@ void amdgpu_dm_atomic_commit_tail(
>>>       dm_state = to_dm_atomic_state(state);
>>>       /* update changed items */
>>> -    for_each_new_crtc_in_state(state, crtc, old_crtc_state, i) {
>>> +    for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) {
>>
>> Better just use for_each_new_old here, so you can get both old and 
>> new from the iterator.
>>
>>>           struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
>>>           struct drm_crtc_state *new_state = crtc->state;
>>> @@ -4113,11 +4105,9 @@ void amdgpu_dm_atomic_commit_tail(
>>>               new_acrtc_state = 
>>> to_dm_crtc_state(new_crtcs[i]->base.state);
>>>               new_stream = new_acrtc_state->stream;
>>> -            aconnector =
>>> -                amdgpu_dm_find_first_crct_matching_connector(
>>> +            aconnector = amdgpu_dm_find_first_crct_matching_connector(
>>>                       state,
>>> -                    &new_crtcs[i]->base,
>>> -                    false);
>>> +                    &new_crtcs[i]->base);
>>>               if (!aconnector) {
>>>                   DRM_DEBUG_DRIVER("Atomic commit: Failed to find 
>>> connector for acrtc id:%d "
>>>                        "skipping freesync init\n",
>>> @@ -4151,7 +4141,7 @@ void amdgpu_dm_atomic_commit_tail(
>>>       }
>>>       /* Handle scaling and undersacn changes*/
>>> -    for_each_new_connector_in_state(state, connector, 
>>> old_conn_state, i) {
>>> +    for_each_old_connector_in_state(state, connector, 
>>> old_conn_state, i) {
>>>           struct amdgpu_dm_connector *aconnector = 
>>> to_amdgpu_dm_connector(connector);
>>>           struct dm_connector_state *con_new_state =
>>> to_dm_connector_state(aconnector->base.state);
>>> @@ -4205,7 +4195,7 @@ void amdgpu_dm_atomic_commit_tail(
>>>       }
>>>       /* update planes when needed per crtc*/
>>> -    for_each_new_crtc_in_state(state, pcrtc, old_crtc_state, j) {
>>> +    for_each_old_crtc_in_state(state, pcrtc, old_crtc_state, j) {
>>>           new_acrtc_state = to_dm_crtc_state(pcrtc->state);
>>
>> Why did you switch to for_each_old iterator here ? if you use the 
>> for_each_new
>> iterator you can get rid of new_acrtc_state = 
>> to_dm_crtc_state(pcrtc->state);
>> and just use the iterator's state
>>>           if (new_acrtc_state->stream)
>>> @@ -4218,7 +4208,7 @@ void amdgpu_dm_atomic_commit_tail(
>>>        * mark consumed event for drm_atomic_helper_commit_hw_done
>>>        */
>>>       spin_lock_irqsave(&adev->ddev->event_lock, flags);
>>> -    for_each_new_crtc_in_state(state, crtc, old_crtc_state, i) {
>>> +    for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) {
>>>           struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
>>
>> Same as above
>>
>> Thanks,
>> Andrey
>>
>
> Patches 1/6 and 2/6 should really be squashed, sorry for the confusion.
> What you've pointed out is addressed in 2/6 :)
>
> Leo

Oh, I see.

Thanks,
Andrey

>
>>>           if (acrtc->base.state->event)
>>> @@ -4402,7 +4392,7 @@ static int dm_update_crtcs_state(
>>>           new_acrtc_state = to_dm_crtc_state(crtc_state);
>>>           acrtc = to_amdgpu_crtc(crtc);
>>> -        aconnector = 
>>> amdgpu_dm_find_first_crct_matching_connector(state, crtc, true);
>>> +        aconnector = 
>>> amdgpu_dm_find_first_crct_matching_connector(state, crtc);
>>>           /* TODO This hack should go away */
>>>           if (aconnector) {
>>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h 
>>> b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
>>> index 630e6cd..1c55a0b 100644
>>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
>>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
>>> @@ -228,8 +228,7 @@ void amdgpu_dm_update_connector_after_detect(
>>>   struct amdgpu_dm_connector 
>>> *amdgpu_dm_find_first_crct_matching_connector(
>>>       struct drm_atomic_state *state,
>>> -    struct drm_crtc *crtc,
>>> -    bool from_state_var);
>>> +    struct drm_crtc *crtc);
>>>   struct amdgpu_framebuffer;
>>