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@xxxxxxxxxxxxxxxx>
Reviewed-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxxxx>
---
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:
--
Regards,
Laurent Pinchart
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