drm/msm/mdp5: drop global_state_lock

Since the commit b962a120 ("drm/atomic: integrate modeset lock with
private objects") the DRM framework no longer requires the external
lock for private objects. Drop the lock, letting the DRM to manage
private object locking.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/570183/
Link: https://lore.kernel.org/r/20231203000532.1290480-6-dmitry.baryshkov@linaro.org

drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c

@@ -84,11 +84,6 @@ struct mdp5_global_state *mdp5_get_global_state(struct drm_atomic_state *s)
 	struct msm_drm_private *priv = s->dev->dev_private;
 	struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
 	struct drm_private_state *priv_state;
-	int ret;
-
-	ret = drm_modeset_lock(&mdp5_kms->glob_state_lock, s->acquire_ctx);
-	if (ret)
-		return ERR_PTR(ret);
 
 	priv_state = drm_atomic_get_private_obj_state(s, &mdp5_kms->glob_state);
 	if (IS_ERR(priv_state))
@@ -138,8 +133,6 @@ static int mdp5_global_obj_init(struct mdp5_kms *mdp5_kms)
 {
 	struct mdp5_global_state *state;
 
-	drm_modeset_lock_init(&mdp5_kms->glob_state_lock);
-
 	state = kzalloc(sizeof(*state), GFP_KERNEL);
 	if (!state)
 		return -ENOMEM;
@@ -580,7 +573,6 @@ static void mdp5_destroy(struct mdp5_kms *mdp5_kms)
 		pm_runtime_disable(&mdp5_kms->pdev->dev);
 
 	drm_atomic_private_obj_fini(&mdp5_kms->glob_state);
-	drm_modeset_lock_fini(&mdp5_kms->glob_state_lock);
 }
 
 static int construct_pipes(struct mdp5_kms *mdp5_kms, int cnt,

drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h

@@ -40,7 +40,6 @@ struct mdp5_kms {
 	 * Global private object state, Do not access directly, use
 	 * mdp5_global_get_state()
 	 */
-	struct drm_modeset_lock glob_state_lock;
 	struct drm_private_obj glob_state;
 
 	struct mdp5_smp *smp;