From: Nicholas Kazlauskas Date: Tue, 5 Mar 2019 14:14:17 +0000 (-0500) Subject: drm/amd/display: Drop atomic_obj_lock for private obj X-Git-Tag: v5.2-rc1~48^2~36^2~158 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=c33f53341790a130e68aafc70cc93916b061a709;p=uclinux-h8%2Flinux.git 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 Signed-off-by: Nicholas Kazlauskas Reviewed-by: Leo Li Signed-off-by: Alex Deucher --- 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 0fbc27e282cf..279cd6e52c90 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -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; 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 fbd161ddc3f4..f741ea35c3ab 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -132,8 +132,6 @@ struct amdgpu_display_manager { */ struct drm_private_obj atomic_obj; - struct drm_modeset_lock atomic_obj_lock; - /** * @dc_lock: *