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Commit 6b854fa1 authored by Ajay Singh Parmar's avatar Ajay Singh Parmar
Browse files

drm/msm/dp: fix hot plug event notification 



Fill the uevent data correctly so that the listening
user modules can parse the data correctly and handle
the hot plug events from sink.

CRs-Fixed: 2072336
Change-Id: If7b5aa3a0bee058652e7ed93e2740e17b2ce6940
Signed-off-by: default avatarAjay Singh Parmar <aparmar@codeaurora.org>
parent 6044b96e

drivers/gpu/drm/msm/msm_drv.c

+12 −14
Original line number Diff line number Diff line
@@ -58,13 +58,14 @@ 
#define MSM_VERSION_PATCHLEVEL	0



#define TEARDOWN_DEADLOCK_RETRY_MAX 5

#define HPD_STRING_SIZE 30



static void msm_drm_helper_hotplug_event(struct drm_device *dev)

{

	struct drm_connector *connector;

	char *event_string;

	char name[HPD_STRING_SIZE], status[HPD_STRING_SIZE];

	char const *connector_name;

	char *envp[2];

	char *envp[3];



	if (!dev) {

		DRM_ERROR("hotplug_event failed, invalid input\n");
@@ -74,12 +75,6 @@ static void msm_drm_helper_hotplug_event(struct drm_device *dev) 
	if (!dev->mode_config.poll_enabled)

		return;



	event_string = kzalloc(SZ_4K, GFP_KERNEL);

	if (!event_string) {

		DRM_ERROR("failed to allocate event string\n");

		return;

	}



	mutex_lock(&dev->mode_config.mutex);

	drm_for_each_connector(connector, dev) {

		/* Only handle HPD capable connectors. */
@@ -93,17 +88,20 @@ static void msm_drm_helper_hotplug_event(struct drm_device *dev) 
		else

			connector_name = "unknown";



		snprintf(event_string, SZ_4K, "name=%s status=%s\n",

			connector_name,

		snprintf(name, HPD_STRING_SIZE, "name=%s", connector_name);



		snprintf(status, HPD_STRING_SIZE, "status=%s",

			drm_get_connector_status_name(connector->status));

		DRM_DEBUG("generating hotplug event [%s]\n", event_string);

		envp[0] = event_string;

		envp[1] = NULL;



		DRM_DEBUG("generating hotplug event [%s]: [%s]\n",

			name, status);

		envp[0] = name;

		envp[1] = status;

		envp[2] = NULL;

		kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE,

				envp);

	}

	mutex_unlock(&dev->mode_config.mutex);

	kfree(event_string);

}



static void msm_fb_output_poll_changed(struct drm_device *dev)