[PATCH v4 2/8] drm/connector: pass down IRQ_HPD to the drivers

[Dmitry Baryshkov]

The DisplayPort standard defines a special kind of HPD events called
IRQ_HPD. These events are used to notify DP Source about the events on
the Sink side.

Extend drm_connector_funcs::oob_hotplug_event() to pass the
notifications about the IRQ_HPD events down to the individual drivers,
letting them handle those as required.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at oss.qualcomm.com>
---
 drivers/gpu/drm/display/drm_bridge_connector.c | 17 ++++++++++-------
 drivers/gpu/drm/drm_connector.c                |  2 +-
 drivers/gpu/drm/i915/display/intel_dp.c        |  3 ++-
 include/drm/drm_connector.h                    |  3 ++-
 4 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/display/drm_bridge_connector.c b/drivers/gpu/drm/display/drm_bridge_connector.c
index 649969fca141..046efd913064 100644
--- a/drivers/gpu/drm/display/drm_bridge_connector.c
+++ b/drivers/gpu/drm/display/drm_bridge_connector.c
@@ -141,7 +141,8 @@ struct drm_bridge_connector {
  */
 
 static void drm_bridge_connector_hpd_notify(struct drm_connector *connector,
-					    enum drm_connector_status status)
+					    enum drm_connector_status status,
+					    enum drm_connector_status_extra extra_status)
 {
 	struct drm_bridge_connector *bridge_connector =
 		to_drm_bridge_connector(connector);
@@ -154,7 +155,8 @@ static void drm_bridge_connector_hpd_notify(struct drm_connector *connector,
 }
 
 static void drm_bridge_connector_handle_hpd(struct drm_bridge_connector *drm_bridge_connector,
-					    enum drm_connector_status status)
+					    enum drm_connector_status status,
+					    enum drm_connector_status_extra extra_status)
 {
 	struct drm_connector *connector = &drm_bridge_connector->base;
 	struct drm_device *dev = connector->dev;
@@ -163,7 +165,7 @@ static void drm_bridge_connector_handle_hpd(struct drm_bridge_connector *drm_bri
 	connector->status = status;
 	mutex_unlock(&dev->mode_config.mutex);
 
-	drm_bridge_connector_hpd_notify(connector, status);
+	drm_bridge_connector_hpd_notify(connector, status, extra_status);
 
 	drm_kms_helper_connector_hotplug_event(connector);
 }
@@ -171,16 +173,17 @@ static void drm_bridge_connector_handle_hpd(struct drm_bridge_connector *drm_bri
 static void drm_bridge_connector_hpd_cb(void *cb_data,
 					enum drm_connector_status status)
 {
-	drm_bridge_connector_handle_hpd(cb_data, status);
+	drm_bridge_connector_handle_hpd(cb_data, status, DRM_CONNECTOR_NO_EXTRA_STATUS);
 }
 
 static void drm_bridge_connector_oob_hotplug_event(struct drm_connector *connector,
-						   enum drm_connector_status status)
+						   enum drm_connector_status status,
+						   enum drm_connector_status_extra extra_status)
 {
 	struct drm_bridge_connector *bridge_connector =
 		to_drm_bridge_connector(connector);
 
-	drm_bridge_connector_handle_hpd(bridge_connector, status);
+	drm_bridge_connector_handle_hpd(bridge_connector, status, extra_status);
 }
 
 static void drm_bridge_connector_enable_hpd(struct drm_connector *connector)
@@ -223,7 +226,7 @@ drm_bridge_connector_detect(struct drm_connector *connector, bool force)
 		if (hdmi)
 			drm_atomic_helper_connector_hdmi_hotplug(connector, status);
 
-		drm_bridge_connector_hpd_notify(connector, status);
+		drm_bridge_connector_hpd_notify(connector, status, DRM_CONNECTOR_NO_EXTRA_STATUS);
 	} else {
 		switch (connector->connector_type) {
 		case DRM_MODE_CONNECTOR_DPI:
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index bb128dd0263a..d99019fdea9c 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -3528,7 +3528,7 @@ void drm_connector_dp_oob_status(struct fwnode_handle *connector_fwnode,
 		return;
 
 	if (connector->funcs->oob_hotplug_event)
-		connector->funcs->oob_hotplug_event(connector, status);
+		connector->funcs->oob_hotplug_event(connector, status, extra_status);
 
 	drm_connector_put(connector);
 }
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 85d3aa3b9894..31acb3129723 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -6990,7 +6990,8 @@ static int intel_dp_connector_atomic_check(struct drm_connector *_connector,
 }
 
 static void intel_dp_oob_hotplug_event(struct drm_connector *_connector,
-				       enum drm_connector_status hpd_state)
+				       enum drm_connector_status hpd_state,
+				       enum drm_connector_status_extra extra_status)
 {
 	struct intel_connector *connector = to_intel_connector(_connector);
 	struct intel_display *display = to_intel_display(connector);
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 105da7c94910..5784bb9c4021 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1720,7 +1720,8 @@ struct drm_connector_funcs {
 	 * has been received from a source outside the display driver / device.
 	 */
 	void (*oob_hotplug_event)(struct drm_connector *connector,
-				  enum drm_connector_status status);
+				  enum drm_connector_status status,
+				  enum drm_connector_status_extra extra_status);
 
 	/**
 	 * @debugfs_init:

-- 
2.47.3