[PATCH] drm/display: hdmi: Do not read EDID on disconnected connectors

[Cristian Ciocaltea]

The recently introduced hotplug event handler in the HDMI Connector
framework attempts to unconditionally read the EDID data, leading to a
bunch of non-harmful, yet quite annoying DDC/I2C related errors being
reported.

Ensure the operation is performed only for connectors having the status
connected or unknown.

Fixes: ab716b74dc9d ("drm/display/hdmi: implement hotplug functions")
Signed-off-by: Cristian Ciocaltea <cristian.ciocal...@collabora.com>
---
 drivers/gpu/drm/display/drm_hdmi_state_helper.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c 
b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
index 
2691e8b3e480131ac6e4e4b74b24947be55694bd..8e4b30e09b53b84cfd36199d56db3221a00085b0
 100644
--- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c
+++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
@@ -786,8 +786,10 @@ drm_atomic_helper_connector_hdmi_update(struct 
drm_connector *connector,
        const struct drm_edid *drm_edid;
 
        if (status == connector_status_disconnected) {
+               drm_edid_connector_update(connector, NULL);
                // TODO: also handle CEC and scramber, HDMI sink disconnected.
                drm_connector_hdmi_audio_plugged_notify(connector, false);
+               return;
        }
 
        if (connector->hdmi.funcs->read_edid)

---
base-commit: 1854df7087be70ad54e24b2e308d7558ebea9f27
change-id: 20250110-hdmi-conn-edid-read-fix-178513c2b7ea