linux-kernel - [PATCH v4 27/34] mei: Migrate to aggregate driver

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Date:   Thu,  2 Dec 2021 14:27:25 -0800
From:   Stephen Boyd <swboyd@...omium.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        Tomas Winkler <tomas.winkler@...el.com>,
        Arnd Bergmann <arnd@...db.de>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Rob Clark <robdclark@...il.com>,
        Russell King <rmk+kernel@....linux.org.uk>,
        Saravana Kannan <saravanak@...gle.com>
Subject: [PATCH v4 27/34] mei: Migrate to aggregate driver

Use an aggregate driver instead of component ops so that we can get
proper driver probe ordering of the aggregate device with respect to all
the component devices that make up the aggregate device.

Cc: Tomas Winkler <tomas.winkler@...el.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Rob Clark <robdclark@...il.com>
Cc: Russell King <rmk+kernel@....linux.org.uk>
Cc: Saravana Kannan <saravanak@...gle.com>
Signed-off-by: Stephen Boyd <swboyd@...omium.org>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index ec2a4fce8581..79dcc02277d2 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -732,8 +732,9 @@ static const struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.close_hdcp_session = mei_hdcp_close_session,
 };
 
-static int mei_component_master_bind(struct device *dev)
+static int mei_component_master_bind(struct aggregate_device *adev)
 {
+	struct device *dev = adev->parent;
 	struct mei_cl_device *cldev = to_mei_cl_device(dev);
 	struct i915_hdcp_comp_master *comp_master =
 						mei_cldev_get_drvdata(cldev);
@@ -749,8 +750,9 @@ static int mei_component_master_bind(struct device *dev)
 	return 0;
 }
 
-static void mei_component_master_unbind(struct device *dev)
+static void mei_component_master_unbind(struct aggregate_device *adev)
 {
+	struct device *dev = adev->parent;
 	struct mei_cl_device *cldev = to_mei_cl_device(dev);
 	struct i915_hdcp_comp_master *comp_master =
 						mei_cldev_get_drvdata(cldev);
@@ -759,9 +761,13 @@ static void mei_component_master_unbind(struct device *dev)
 	component_unbind_all(dev, comp_master);
 }
 
-static const struct component_master_ops mei_component_master_ops = {
-	.bind = mei_component_master_bind,
-	.unbind = mei_component_master_unbind,
+static struct aggregate_driver mei_aggregate_driver = {
+	.probe = mei_component_master_bind,
+	.remove = mei_component_master_unbind,
+	.driver = {
+		.name = "mei_agg",
+		.owner = THIS_MODULE,
+	},
 };
 
 /**
@@ -826,9 +832,7 @@ static int mei_hdcp_probe(struct mei_cl_device *cldev,
 	}
 
 	mei_cldev_set_drvdata(cldev, comp_master);
-	ret = component_master_add_with_match(&cldev->dev,
-					      &mei_component_master_ops,
-					      master_match);
+	ret = component_aggregate_register(&cldev->dev, &mei_aggregate_driver, master_match);
 	if (ret < 0) {
 		dev_err(&cldev->dev, "Master comp add failed %d\n", ret);
 		goto err_exit;
@@ -850,7 +854,7 @@ static void mei_hdcp_remove(struct mei_cl_device *cldev)
 						mei_cldev_get_drvdata(cldev);
 	int ret;
 
-	component_master_del(&cldev->dev, &mei_component_master_ops);
+	component_aggregate_unregister(&cldev->dev, &mei_aggregate_driver);
 	kfree(comp_master);
 	mei_cldev_set_drvdata(cldev, NULL);
 
-- 
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