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 --- drivers/gpu/drm/omapdrm/displays/connector-hdmi.c | 7 +---- .../gpu/drm/omapdrm/displays/encoder-tpd12s015.c | 7 +---- drivers/gpu/drm/omapdrm/omap_connector.c | 33 ++++++++++++++++++---- 3 files changed, 29 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c b/drivers/gpu/drm/omapdrm/displays/connector-hdmi.c index 84cc68388940..6f2364afb14a 100644 --- 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 d6d08148a3e5..da97d357bde7 100644 --- 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 e77427d81eb9..344414ef3962 100644 --- 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: