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drm/bridge: synopsys: dw-dp: Support unregistering the AUX channel

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The DisplayPort AUX channel gets initialized and registered during
dw_dp_bind(), but it is never unregistered, which may lead to resource
leaks and/or use-after-free.

Add the missing dw_dp_unbind() function to allow the users of the
library to handle the required cleanup, i.e. unregister the AUX adapter.

Fixes: 86eecc3a9c ("drm/bridge: synopsys: Add DW DPTX Controller support library")
Reviewed-by: Andy Yan <andy.yan@rock-chips.com>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patch.msgid.link/20260601-drm-rk-fixes-v4-1-c3f3f123e1da@collabora.com
This commit is contained in:
Cristian Ciocaltea 2026-06-01 19:13:44 +03:00 committed by Heiko Stuebner
parent 28e670a088
commit ed04e8e230
2 changed files with 7 additions and 0 deletions
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6
drivers/gpu/drm/bridge/synopsys/dw-dp.c
View File

@ -2093,6 +2093,12 @@ struct dw_dp *dw_dp_bind(struct device *dev, struct drm_encoder *encoder,
}
EXPORT_SYMBOL_GPL(dw_dp_bind);
void dw_dp_unbind(struct dw_dp *dp)
{
drm_dp_aux_unregister(&dp->aux);
}
EXPORT_SYMBOL_GPL(dw_dp_unbind);
MODULE_AUTHOR("Andy Yan <andyshrk@163.com>");
MODULE_DESCRIPTION("DW DP Core Library");
MODULE_LICENSE("GPL");

1
include/drm/bridge/dw_dp.h
View File

@ -24,4 +24,5 @@ struct dw_dp_plat_data {
struct dw_dp *dw_dp_bind(struct device *dev, struct drm_encoder *encoder,
const struct dw_dp_plat_data *plat_data);
void dw_dp_unbind(struct dw_dp *dp);
#endif /* __DW_DP__ */