[bug report] drm/display: hdmi: Add HDMI 2.0 scrambling management helpers

[Dan Carpenter <error27@gmail.com>]

Hello Cristian Ciocaltea,

Commit d653818324ed ("drm/display: hdmi: Add HDMI 2.0 scrambling
management helpers") from Sep 1, 2026, leads to the following Smatch
complaint:

    drivers/gpu/drm/display/drm_hdmi_helper.c:663 drm_connector_hdmi_sync_scdc()
    warn: variable dereferenced before check 'connector' (see line 657)

drivers/gpu/drm/display/drm_hdmi_helper.c
   656		struct drm_connector_hdmi *hdmi = &connector->hdmi;
   657		struct drm_device *dev = connector->dev;
                                         ^^^^^^^^^^^^^^
Dereference.

   658		struct drm_connector_state *conn_state;
   659		struct drm_crtc *crtc;
   660		u8 config;
   661		int ret;
   662	
   663		if (!connector || !plugged || !ctx)
                     ^^^^^^^^^
Checked too late.

   664			return 0;
   665	

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regards,
dan carpenter