drm/meson: fix memory leak on ->hpd_notify callback

The EDID returned by drm_bridge_get_edid() needs to be freed.

Fixes: 0af5e0b ("drm/meson: encoder_hdmi: switch to bridge DRM_BRIDGE_ATTACH_NO_CONNECTOR")
Cc: Neil Armstrong <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Cc: Martin Blumenstingl <[email protected]>
Cc: Neil Armstrong <[email protected]>
Cc: Kevin Hilman <[email protected]>
Cc: Jerome Brunet <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected] # v5.17+
Signed-off-by: Jani Nikula <[email protected]>
Reviewed-by: Neil Armstrong <[email protected]>
Signed-off-by: Neil Armstrong <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: jnikula

drivers/gpu/drm/meson/meson_encoder_hdmi.c

@@ -334,6 +334,8 @@ static void meson_encoder_hdmi_hpd_notify(struct drm_bridge *bridge,
 			return;
 
 		cec_notifier_set_phys_addr_from_edid(encoder_hdmi->cec_notifier, edid);
+
+		kfree(edid);
 	} else
 		cec_notifier_phys_addr_invalidate(encoder_hdmi->cec_notifier);
 }