drm/msm/kms: Update msm_kms_init/destroy

Add msm_kms_destroy() and add err return from msm_kms_init().  Prep work
for next patch.
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c

@@ -718,6 +718,8 @@ static void dpu_kms_destroy(struct msm_kms *kms)
 	dpu_kms = to_dpu_kms(kms);
 
 	_dpu_kms_hw_destroy(dpu_kms);
+
+	msm_kms_destroy(&dpu_kms->base);
 }
 
 static void _dpu_kms_set_encoder_mode(struct msm_kms *kms,
@@ -1108,7 +1110,11 @@ static int dpu_bind(struct device *dev, struct device *master, void *data)
 
 	platform_set_drvdata(pdev, dpu_kms);
 
-	msm_kms_init(&dpu_kms->base, &kms_funcs);
+	ret = msm_kms_init(&dpu_kms->base, &kms_funcs);
+	if (ret) {
+		DPU_ERROR("failed to init kms, ret=%d\n", ret);
+		goto err;
+	}
 	dpu_kms->dev = ddev;
 	dpu_kms->pdev = pdev;
 

drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c

@@ -175,6 +175,8 @@ static void mdp4_destroy(struct msm_kms *kms)
 	if (mdp4_kms->rpm_enabled)
 		pm_runtime_disable(dev);
 
+	mdp_kms_destroy(&mdp4_kms->base);
+
 	kfree(mdp4_kms);
 }
 
@@ -427,7 +429,11 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev)
 		goto fail;
 	}
 
-	mdp_kms_init(&mdp4_kms->base, &kms_funcs);
+	ret = mdp_kms_init(&mdp4_kms->base, &kms_funcs);
+	if (ret) {
+		DRM_DEV_ERROR(dev->dev, "failed to init kms\n");
+		goto fail;
+	}
 
 	kms = &mdp4_kms->base.base;
 

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

@@ -232,6 +232,8 @@ static void mdp5_kms_destroy(struct msm_kms *kms)
 		aspace->mmu->funcs->detach(aspace->mmu);
 		msm_gem_address_space_put(aspace);
 	}
+
+	mdp_kms_destroy(&mdp5_kms->base);
 }
 
 #ifdef CONFIG_DEBUG_FS
@@ -592,11 +594,14 @@ struct msm_kms *mdp5_kms_init(struct drm_device *dev)
 		return NULL;
 
 	mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
-
-	mdp_kms_init(&mdp5_kms->base, &kms_funcs);
-
 	pdev = mdp5_kms->pdev;
 
+	ret = mdp_kms_init(&mdp5_kms->base, &kms_funcs);
+	if (ret) {
+		DRM_DEV_ERROR(&pdev->dev, "failed to init kms\n");
+		goto fail;
+	}
+
 	irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
 	if (irq < 0) {
 		ret = irq;

drivers/gpu/drm/msm/disp/mdp_kms.h

@@ -36,12 +36,17 @@ struct mdp_kms {
 };
 #define to_mdp_kms(x) container_of(x, struct mdp_kms, base)
 
-static inline void mdp_kms_init(struct mdp_kms *mdp_kms,
+static inline int mdp_kms_init(struct mdp_kms *mdp_kms,
 		const struct mdp_kms_funcs *funcs)
 {
 	mdp_kms->funcs = funcs;
 	INIT_LIST_HEAD(&mdp_kms->irq_list);
-	msm_kms_init(&mdp_kms->base, &funcs->base);
+	return msm_kms_init(&mdp_kms->base, &funcs->base);
+}
+
+static inline void mdp_kms_destroy(struct mdp_kms *mdp_kms)
+{
+	msm_kms_destroy(&mdp_kms->base);
 }
 
 /*

drivers/gpu/drm/msm/msm_kms.h

@@ -160,7 +160,7 @@ struct msm_kms {
 	struct msm_pending_timer pending_timers[MAX_CRTCS];
 };
 
-static inline void msm_kms_init(struct msm_kms *kms,
+static inline int msm_kms_init(struct msm_kms *kms,
 		const struct msm_kms_funcs *funcs)
 {
 	unsigned i;
@@ -172,6 +172,12 @@ static inline void msm_kms_init(struct msm_kms *kms,
 
 	for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++)
 		msm_atomic_init_pending_timer(&kms->pending_timers[i], kms, i);
+
+	return 0;
+}
+
+static inline void msm_kms_destroy(struct msm_kms *kms)
+{
 }
 
 struct msm_kms *mdp4_kms_init(struct drm_device *dev);