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drm: Add HPD state to drm_connector_oob_hotplug_event()

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In some implementations, such as the Qualcomm platforms, the display
driver has no way to query the current HPD state and as such it's
impossible to distinguish between disconnect and attention events.

Add a parameter to drm_connector_oob_hotplug_event() to pass the HPD
state.

Also push the test for unchanged state in the displayport altmode driver
into the i915 driver, to allow other drivers to act upon each update.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20231009174048.2695981-2-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231009174048.2695981-2-dmitry.baryshkov@linaro.org
This commit is contained in:
Bjorn Andersson
2023-10-09 20:40:46 +03:00
committed by Dmitry Baryshkov
parent 57390019b6
commit fc93835bb0
5 changed files with 34 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/drm_connector.c
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@@ -3060,6 +3060,7 @@ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
/**
* drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector
* @connector_fwnode: fwnode_handle to report the event on
* @status: hot plug detect logical state
*
* On some hardware a hotplug event notification may come from outside the display
* driver / device. An example of this is some USB Type-C setups where the hardware
@@ -3069,7 +3070,8 @@ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
* This function can be used to report these out-of-band events after obtaining
* a drm_connector reference through calling drm_connector_find_by_fwnode().
*/
void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode,
enum drm_connector_status status)
{
struct drm_connector *connector;
@@ -3078,7 +3080,7 @@ void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
return;
if (connector->funcs->oob_hotplug_event)
connector->funcs->oob_hotplug_event(connector);
connector->funcs->oob_hotplug_event(connector, status);
drm_connector_put(connector);
}