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drm/amd/display: Drop atomic_obj_lock for private obj 

[Why]
New DRM versions manage locking for private objects for us, so this
is no longer needed.

This also prevents a WARN_ON from occurring when the private object is
duplicated during the forced atomic commit that occurs from the HPD
handler.

The HPD handler calls drm_modeset_lock_all before the forced commit
and if the private object is duplicated then the
DEBUG_LOCKS_WARN_ON(ww_ctx->done_acquire) warning will be triggered
since we're trying to lock something when everything should have
already been locked.

[How]
Drop the lock and let DRM manage this.

Cc: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicholas Kazlauskas 2019-03-05 09:14:17 -05:00 committed by Alex Deucher
parent 054d282d17
commit c33f533417
2 changed files with 0 additions and 9 deletions
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7
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@ -1568,15 +1568,10 @@ static int dm_atomic_get_state(struct drm_atomic_state *state,
struct amdgpu_device *adev = dev->dev_private;
struct amdgpu_display_manager *dm = &adev->dm;
struct drm_private_state *priv_state;
int ret;
if (*dm_state)
return 0;
ret = drm_modeset_lock(&dm->atomic_obj_lock, state->acquire_ctx);
if (ret)
return ret;
priv_state = drm_atomic_get_private_obj_state(state, &dm->atomic_obj);
if (IS_ERR(priv_state))
return PTR_ERR(priv_state);
@ -1683,8 +1678,6 @@ static int amdgpu_dm_mode_config_init(struct amdgpu_device *adev)
adev->ddev->mode_config.fb_base = adev->gmc.aper_base;
drm_modeset_lock_init(&adev->dm.atomic_obj_lock);
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return -ENOMEM;

2
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
View File

@ -132,8 +132,6 @@ struct amdgpu_display_manager {
*/
struct drm_private_obj atomic_obj;
struct drm_modeset_lock atomic_obj_lock;
/**
* @dc_lock:
*