[media] sti: hdmi: add CEC notifier support

Implement the CEC notifier support to allow CEC drivers to
be informed when there is a new physical address.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/gpu/drm/sti/sti_hdmi.c

@@ -771,6 +771,8 @@ static void sti_hdmi_disable(struct drm_bridge *bridge)
 	clk_disable_unprepare(hdmi->clk_pix);
 
 	hdmi->enabled = false;
+
+	cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID);
 }
 
 /**
@@ -973,6 +975,7 @@ static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
 	DRM_DEBUG_KMS("%s : %dx%d cm\n",
 		      (hdmi->hdmi_monitor ? "hdmi monitor" : "dvi monitor"),
 		      edid->width_cm, edid->height_cm);
+	cec_notifier_set_phys_addr_from_edid(hdmi->notifier, edid);
 
 	count = drm_add_edid_modes(connector, edid);
 	drm_mode_connector_update_edid_property(connector, edid);
@@ -1035,6 +1038,7 @@ sti_hdmi_connector_detect(struct drm_connector *connector, bool force)
 	}
 
 	DRM_DEBUG_DRIVER("hdmi cable disconnected\n");
+	cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID);
 	return connector_status_disconnected;
 }
 
@@ -1423,6 +1427,10 @@ static int sti_hdmi_probe(struct platform_device *pdev)
 		goto release_adapter;
 	}
 
+	hdmi->notifier = cec_notifier_get(&pdev->dev);
+	if (!hdmi->notifier)
+		goto release_adapter;
+
 	hdmi->reset = devm_reset_control_get(dev, "hdmi");
 	/* Take hdmi out of reset */
 	if (!IS_ERR(hdmi->reset))
@@ -1442,11 +1450,14 @@ static int sti_hdmi_remove(struct platform_device *pdev)
 {
 	struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
 
+	cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID);
+
 	i2c_put_adapter(hdmi->ddc_adapt);
 	if (hdmi->audio_pdev)
 		platform_device_unregister(hdmi->audio_pdev);
 	component_del(&pdev->dev, &sti_hdmi_ops);
 
+	cec_notifier_put(hdmi->notifier);
 	return 0;
 }