diff mbox series

[v3,29/71] drm/vc4: dpi: Switch to DRM-managed encoder initialization

Message ID 20220629123510.1915022-30-maxime@cerno.tech (mailing list archive)
State New, archived
Headers show
Series drm/vc4: Fix hotplug for vc4 | expand

Commit Message

Maxime Ripard June 29, 2022, 12:34 p.m. UTC
The current code will call drm_encoder_cleanup() when the device is
unbound. However, by then, there might still be some references held to
that encoder, including by the userspace that might still have the DRM
device open.

Let's switch to a DRM-managed initialization to clean up after ourselves
only once the DRM device has been last closed.

Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_dpi.c | 23 ++++++++---------------
 1 file changed, 8 insertions(+), 15 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/vc4/vc4_dpi.c b/drivers/gpu/drm/vc4/vc4_dpi.c
index 9c5629e9e446..6e0d8da4ae1e 100644
--- a/drivers/gpu/drm/vc4/vc4_dpi.c
+++ b/drivers/gpu/drm/vc4/vc4_dpi.c
@@ -315,35 +315,28 @@  static int vc4_dpi_bind(struct device *dev, struct device *master, void *data)
 	if (ret)
 		return ret;
 
-	drm_simple_encoder_init(drm, &dpi->encoder.base, DRM_MODE_ENCODER_DPI);
+	ret = drmm_encoder_init(drm, &dpi->encoder.base,
+				NULL,
+				DRM_MODE_ENCODER_DPI,
+				NULL);
+	if (ret)
+		return ret;
+
 	drm_encoder_helper_add(&dpi->encoder.base, &vc4_dpi_encoder_helper_funcs);
 
 	ret = vc4_dpi_init_bridge(dpi);
 	if (ret)
-		goto err_destroy_encoder;
+		return ret;
 
 	dev_set_drvdata(dev, dpi);
 
 	vc4_debugfs_add_regset32(drm, "dpi_regs", &dpi->regset);
 
 	return 0;
-
-err_destroy_encoder:
-	drm_encoder_cleanup(&dpi->encoder.base);
-	return ret;
-}
-
-static void vc4_dpi_unbind(struct device *dev, struct device *master,
-			   void *data)
-{
-	struct vc4_dpi *dpi = dev_get_drvdata(dev);
-
-	drm_encoder_cleanup(&dpi->encoder.base);
 }
 
 static const struct component_ops vc4_dpi_ops = {
 	.bind   = vc4_dpi_bind,
-	.unbind = vc4_dpi_unbind,
 };
 
 static int vc4_dpi_dev_probe(struct platform_device *pdev)