drm/tegra: Refactor CEC support

Most of the CEC support code already lives in the "output" library code.
Move registration and unregistration to the library code as well to make
use of the same code with HDMI on Tegra210 and later via the SOR.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/drm.h

@@ -124,7 +124,7 @@ struct tegra_output {
 	struct drm_panel *panel;
 	struct i2c_adapter *ddc;
 	const struct edid *edid;
-	struct cec_notifier *notifier;
+	struct cec_notifier *cec;
 	unsigned int hpd_irq;
 	int hpd_gpio;
 	enum of_gpio_flags hpd_gpio_flags;

drivers/gpu/drm/tegra/hdmi.c

@@ -22,8 +22,6 @@
 
 #include <sound/hda_verbs.h>
 
-#include <media/cec-notifier.h>
-
 #include "hdmi.h"
 #include "drm.h"
 #include "dc.h"
@@ -1709,10 +1707,6 @@ static int tegra_hdmi_probe(struct platform_device *pdev)
 		return PTR_ERR(hdmi->vdd);
 	}
 
-	hdmi->output.notifier = cec_notifier_get(&pdev->dev);
-	if (hdmi->output.notifier == NULL)
-		return -ENOMEM;
-
 	hdmi->output.dev = &pdev->dev;
 
 	err = tegra_output_probe(&hdmi->output);
@@ -1771,9 +1765,6 @@ static int tegra_hdmi_remove(struct platform_device *pdev)
 
 	tegra_output_remove(&hdmi->output);
 
-	if (hdmi->output.notifier)
-		cec_notifier_put(hdmi->output.notifier);
-
 	return 0;
 }
 

drivers/gpu/drm/tegra/output.c

@@ -36,7 +36,7 @@ int tegra_output_connector_get_modes(struct drm_connector *connector)
 	else if (output->ddc)
 		edid = drm_get_edid(connector, output->ddc);
 
-	cec_notifier_set_phys_addr_from_edid(output->notifier, edid);
+	cec_notifier_set_phys_addr_from_edid(output->cec, edid);
 	drm_connector_update_edid_property(connector, edid);
 
 	if (edid) {
@@ -73,7 +73,7 @@ tegra_output_connector_detect(struct drm_connector *connector, bool force)
 	}
 
 	if (status != connector_status_connected)
-		cec_notifier_phys_addr_invalidate(output->notifier);
+		cec_notifier_phys_addr_invalidate(output->cec);
 
 	return status;
 }
@@ -174,11 +174,18 @@ int tegra_output_probe(struct tegra_output *output)
 		disable_irq(output->hpd_irq);
 	}
 
+	output->cec = cec_notifier_get(output->dev);
+	if (!output->cec)
+		return -ENOMEM;
+
 	return 0;
 }
 
 void tegra_output_remove(struct tegra_output *output)
 {
+	if (output->cec)
+		cec_notifier_put(output->cec);
+
 	if (gpio_is_valid(output->hpd_gpio)) {
 		free_irq(output->hpd_irq, output);
 		gpio_free(output->hpd_gpio);