drm/omap: Move HPD disconnection handling to omap_connector

On HDMI outputs, CEC support requires notification of HPD signal
deassertion. The HPD signal can be handled by various omap_dss_device
instances in the pipeline, and all of them forward HPD events to the
OMAP4 internal HDMI encoder.

Knowledge of the DSS internals need to be removed from the
omap_dss_device instances in order to migrate to drm_bridge. To do so,
move HPD handling for CEC to the omap_connector.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

diff --git a/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c b/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c
index 84cc683..6f2364a 100644 (file)
--- a/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c
+++ b/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c
@@ -137,13 +137,8 @@ static int hdmic_read_edid(struct omap_dss_device *dssdev,
 static bool hdmic_detect(struct omap_dss_device *dssdev)
 {
        struct panel_drv_data *ddata = to_panel_data(dssdev);
-       struct omap_dss_device *src = dssdev->src;
-       bool connected;
 
-       connected = gpiod_get_value_cansleep(ddata->hpd_gpio);
-       if (!connected && src->ops->hdmi.lost_hotplug)
-               src->ops->hdmi.lost_hotplug(src);
-       return connected;
+       return gpiod_get_value_cansleep(ddata->hpd_gpio);
 }
 
 static void hdmic_register_hpd_cb(struct omap_dss_device *dssdev,

diff --git a/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c b/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c
index d6d0814..da97d35 100644 (file)
--- a/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c
+++ b/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c
@@ -130,13 +130,8 @@ static int tpd_read_edid(struct omap_dss_device *dssdev,
 static bool tpd_detect(struct omap_dss_device *dssdev)
 {
        struct panel_drv_data *ddata = to_panel_data(dssdev);
-       struct omap_dss_device *src = dssdev->src;
-       bool connected;
 
-       connected = gpiod_get_value_cansleep(ddata->hpd_gpio);
-       if (!connected && src->ops->hdmi.lost_hotplug)
-               src->ops->hdmi.lost_hotplug(src);
-       return connected;
+       return gpiod_get_value_cansleep(ddata->hpd_gpio);
 }
 
 static void tpd_register_hpd_cb(struct omap_dss_device *dssdev,

diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c b/drivers/gpu/drm/omapdrm/omap_connector.c
index e77427d..344414e 100644 (file)
--- a/drivers/gpu/drm/omapdrm/omap_connector.c
+++ b/drivers/gpu/drm/omapdrm/omap_connector.c
@@ -34,6 +34,22 @@ struct omap_connector {
        bool hdmi_mode;
 };
 
+static void omap_connector_hpd_notify(struct drm_connector *connector,
+                                     struct omap_dss_device *src,
+                                     enum drm_connector_status status)
+{
+       if (status == connector_status_disconnected) {
+               /*
+                * If the source is an HDMI encoder, notify it of disconnection.
+                * This is required to let the HDMI encoder reset any internal
+                * state related to connection status, such as the CEC address.
+                */
+               if (src && src->type == OMAP_DISPLAY_TYPE_HDMI &&
+                   src->ops->hdmi.lost_hotplug)
+                       src->ops->hdmi.lost_hotplug(src);
+       }
+}
+
 static void omap_connector_hpd_cb(void *cb_data,
                                  enum drm_connector_status status)
 {
@@ -47,8 +63,12 @@ static void omap_connector_hpd_cb(void *cb_data,
        connector->status = status;
        mutex_unlock(&dev->mode_config.mutex);
 
-       if (old_status != status)
-               drm_kms_helper_hotplug_event(dev);
+       if (old_status == status)
+               return;
+
+       omap_connector_hpd_notify(connector, omap_connector->hpd, status);
+
+       drm_kms_helper_hotplug_event(dev);
 }
 
 void omap_connector_enable_hpd(struct drm_connector *connector)
@@ -103,10 +123,11 @@ static enum drm_connector_status omap_connector_detect(
                                            OMAP_DSS_DEVICE_OP_DETECT);
 
        if (dssdev) {
-               if (dssdev->ops->detect(dssdev))
-                       status = connector_status_connected;
-               else
-                       status = connector_status_disconnected;
+               status = dssdev->ops->detect(dssdev)
+                      ? connector_status_connected
+                      : connector_status_disconnected;
+
+               omap_connector_hpd_notify(connector, dssdev->src, status);
        } else {
                switch (omap_connector->dssdev->type) {
                case OMAP_DISPLAY_TYPE_DPI: