[PATCHv6 03/10] exynos_hdmi: add CEC notifier support

[Hans Verkuil]

From: Hans Verkuil <hans.verk...@cisco.com>

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

Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Tested-by: Marek Szyprowski <m.szyprow...@samsung.com>
Acked-by: Daniel Vetter <daniel.vet...@ffwll.ch>
Acked-by: Krzysztof Kozlowski <k...@kernel.org>
---
 drivers/gpu/drm/exynos/exynos_hdmi.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c 
b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 88ccc0469316..bc4c8d0a66f4 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -43,6 +43,8 @@
 
 #include <drm/exynos_drm.h>
 
+#include <media/cec-notifier.h>
+
 #include "exynos_drm_drv.h"
 #include "exynos_drm_crtc.h"
 
@@ -119,6 +121,7 @@ struct hdmi_context {
        bool                            dvi_mode;
        struct delayed_work             hotplug_work;
        struct drm_display_mode         current_mode;
+       struct cec_notifier             *notifier;
        const struct hdmi_driver_data   *drv_data;
 
        void __iomem                    *regs;
@@ -822,6 +825,7 @@ static enum drm_connector_status hdmi_detect(struct 
drm_connector *connector,
        if (gpiod_get_value(hdata->hpd_gpio))
                return connector_status_connected;
 
+       cec_notifier_set_phys_addr(hdata->notifier, CEC_PHYS_ADDR_INVALID);
        return connector_status_disconnected;
 }
 
@@ -860,6 +864,7 @@ static int hdmi_get_modes(struct drm_connector *connector)
                edid->width_cm, edid->height_cm);
 
        drm_mode_connector_update_edid_property(connector, edid);
+       cec_notifier_set_phys_addr_from_edid(hdata->notifier, edid);
 
        ret = drm_add_edid_modes(connector, edid);
 
@@ -1503,6 +1508,7 @@ static void hdmi_disable(struct drm_encoder *encoder)
        if (funcs && funcs->disable)
                (*funcs->disable)(crtc);
 
+       cec_notifier_set_phys_addr(hdata->notifier, CEC_PHYS_ADDR_INVALID);
        cancel_delayed_work(&hdata->hotplug_work);
 
        hdmiphy_disable(hdata);
@@ -1878,15 +1884,22 @@ static int hdmi_probe(struct platform_device *pdev)
                }
        }
 
+       hdata->notifier = cec_notifier_get(&pdev->dev);
+       if (hdata->notifier == NULL) {
+               ret = -ENOMEM;
+               goto err_hdmiphy;
+       }
+
        pm_runtime_enable(dev);
 
        ret = component_add(&pdev->dev, &hdmi_component_ops);
        if (ret)
-               goto err_disable_pm_runtime;
+               goto err_notifier_put;
 
        return ret;
 
-err_disable_pm_runtime:
+err_notifier_put:
+       cec_notifier_put(hdata->notifier);
        pm_runtime_disable(dev);
 
 err_hdmiphy:
@@ -1905,9 +1918,11 @@ static int hdmi_remove(struct platform_device *pdev)
        struct hdmi_context *hdata = platform_get_drvdata(pdev);
 
        cancel_delayed_work_sync(&hdata->hotplug_work);
+       cec_notifier_set_phys_addr(hdata->notifier, CEC_PHYS_ADDR_INVALID);
 
        component_del(&pdev->dev, &hdmi_component_ops);
 
+       cec_notifier_put(hdata->notifier);
        pm_runtime_disable(&pdev->dev);
 
        if (!IS_ERR(hdata->reg_hdmi_en))
-- 
2.11.0