[PATCH] drm/exynos: update to use component match support

[Inki Dae]

Update Exynos's DRM driver to use component match support rater than
add_components.

Signed-off-by: Inki Dae <inki.dae at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_drv.c |   40 ++++++++++++++-----------------
 1 file changed, 18 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index feee991..dae62c2 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -503,16 +503,15 @@ static int compare_of(struct device *dev, void *data)
 	return dev == (struct device *)data;
 }
 
-static int exynos_drm_add_components(struct device *dev, struct master *m)
+static struct component_match *exynos_drm_match_add(struct device *dev)
 {
+	struct component_match *match = NULL;
 	struct component_dev *cdev;
 	unsigned int attach_cnt = 0;
 
 	mutex_lock(&drm_component_lock);
 
 	list_for_each_entry(cdev, &drm_component_list, list) {
-		int ret;
-
 		/*
 		 * Add components to master only in case that crtc and
 		 * encoder/connector device objects exist.
@@ -527,16 +526,10 @@ static int exynos_drm_add_components(struct device *dev, struct master *m)
 		/*
 		 * fimd and dpi modules have same device object so add
 		 * only crtc device object in this case.
-		 *
-		 * TODO. if dpi module follows driver-model driver then
-		 * below codes can be removed.
 		 */
 		if (cdev->crtc_dev == cdev->conn_dev) {
-			ret = component_master_add_child(m, compare_of,
-					cdev->crtc_dev);
-			if (ret < 0)
-				return ret;
-
+			component_match_add(dev, &match, compare_of,
+						cdev->crtc_dev);
 			goto out_lock;
 		}
 
@@ -546,11 +539,8 @@ static int exynos_drm_add_components(struct device *dev, struct master *m)
 		 * connector/encoder need pipe number of crtc when they
 		 * are created.
 		 */
-		ret = component_master_add_child(m, compare_of, cdev->crtc_dev);
-		ret |= component_master_add_child(m, compare_of,
-							cdev->conn_dev);
-		if (ret < 0)
-			return ret;
+		component_match_add(dev, &match, compare_of, cdev->crtc_dev);
+		component_match_add(dev, &match, compare_of, cdev->conn_dev);
 
 out_lock:
 		mutex_lock(&drm_component_lock);
@@ -558,7 +548,7 @@ out_lock:
 
 	mutex_unlock(&drm_component_lock);
 
-	return attach_cnt ? 0 : -ENODEV;
+	return attach_cnt ? match : ERR_PTR(-EPROBE_DEFER);
 }
 
 static int exynos_drm_bind(struct device *dev)
@@ -572,13 +562,13 @@ static void exynos_drm_unbind(struct device *dev)
 }
 
 static const struct component_master_ops exynos_drm_ops = {
-	.add_components = exynos_drm_add_components,
 	.bind		= exynos_drm_bind,
 	.unbind		= exynos_drm_unbind,
 };
 
 static int exynos_drm_platform_probe(struct platform_device *pdev)
 {
+	struct component_match *match;
 	int ret;
 
 	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
@@ -645,13 +635,19 @@ static int exynos_drm_platform_probe(struct platform_device *pdev)
 		goto err_unregister_ipp_drv;
 #endif
 
-	ret = component_master_add(&pdev->dev, &exynos_drm_ops);
-	if (ret < 0)
-		DRM_DEBUG_KMS("re-tried by last sub driver probed later.\n");
+	match = exynos_drm_match_add(&pdev->dev);
+	if (IS_ERR(match)) {
+		ret = PTR_ERR(match);
+		goto err_unregister_ipp_dev;
+	}
 
-	return 0;
+	return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
+						match);
+
+err_unregister_ipp_dev:
 
 #ifdef CONFIG_DRM_EXYNOS_IPP
+	exynos_platform_device_ipp_unregister();
 err_unregister_ipp_drv:
 	platform_driver_unregister(&ipp_driver);
 err_unregister_gsc_drv:
-- 
1.7.9.5