[PATCH v2 11/68] drm/vc4: drv: Call component_unbind_all()

[Maxime Ripard]

While we were using the component framework to deal with all the DRM
subdevices, we were not calling component_unbind_all().

This leads to none of the subdevices freeing up their resources as part of
their unbind() or device managed hooks.

Fixes: c8b75bca92cb ("drm/vc4: Add KMS support for Raspberry Pi.")
Reviewed-by: Dave Stevenson <dave.stevenson at raspberrypi.com>
Signed-off-by: Maxime Ripard <maxime at cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_drv.c | 14 ++++++++++++--
 drivers/gpu/drm/vc4/vc4_drv.h |  1 +
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 0f0f0263e744..90575171824d 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -267,6 +267,13 @@ static void vc4_match_add_drivers(struct device *dev,
 	}
 }
 
+static void vc4_component_unbind_all(void *ptr)
+{
+	struct vc4_dev *vc4 = ptr;
+
+	component_unbind_all(vc4->dev, &vc4->base);
+}
+
 static int vc4_drm_bind(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
@@ -291,6 +298,7 @@ static int vc4_drm_bind(struct device *dev)
 	if (IS_ERR(vc4))
 		return PTR_ERR(vc4);
 	vc4->is_vc5 = is_vc5;
+	vc4->dev = dev;
 
 	drm = &vc4->base;
 	platform_set_drvdata(pdev, drm);
@@ -341,6 +349,10 @@ static int vc4_drm_bind(struct device *dev)
 	if (ret)
 		return ret;
 
+	ret = devm_add_action_or_reset(dev, vc4_component_unbind_all, vc4);
+	if (ret)
+		return ret;
+
 	ret = vc4_plane_create_additional_planes(drm);
 	if (ret)
 		goto unbind_all;
@@ -361,8 +373,6 @@ static int vc4_drm_bind(struct device *dev)
 	return 0;
 
 unbind_all:
-	component_unbind_all(dev, drm);
-
 	return ret;
 }
 
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index 93fd55b9e99e..c48a73914200 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -75,6 +75,7 @@ struct vc4_perfmon {
 
 struct vc4_dev {
 	struct drm_device base;
+	struct device *dev;
 
 	bool is_vc5;
 
-- 
2.36.1