[media] dvb_frontend.h: Document suspend/resume functions (41c0b78e) · Commits · 戴 / test

drivers/media/dvb-core/dvb_frontend.h

+38 −2

Original line number	Diff line number	Diff line
		@@ -754,8 +754,44 @@ int dvb_unregister_frontend(struct dvb_frontend *fe);
		*/
		void dvb_frontend_detach(struct dvb_frontend *fe);

		extern int dvb_frontend_suspend(struct dvb_frontend *fe);
		extern int dvb_frontend_resume(struct dvb_frontend *fe);
		/**
		* dvb_frontend_suspend() - Suspends a Digital TV frontend
		*
		* @fe: pointer to the frontend struct
		*
		* This function prepares a Digital TV frontend to suspend.
		*
		* In order to prepare the tuner to suspend, if
		* &dvb_frontend_ops.tuner_ops.suspend() is available, it calls it. Otherwise,
		* it will call &dvb_frontend_ops.tuner_ops.sleep(), if available.
		*
		* It will also call &dvb_frontend_ops.sleep() to put the demod to suspend.
		*
		* The drivers should also call dvb_frontend_suspend() as part of their
		* handler for the &device_driver.suspend().
		*/
		int dvb_frontend_suspend(struct dvb_frontend *fe);

		/**
		* dvb_frontend_resume() - Resumes a Digital TV frontend
		*
		* @fe: pointer to the frontend struct
		*
		* This function resumes the usual operation of the tuner after resume.
		*
		* In order to resume the frontend, it calls the demod &dvb_frontend_ops.init().
		*
		* If &dvb_frontend_ops.tuner_ops.resume() is available, It, it calls it.
		* Otherwise,t will call &dvb_frontend_ops.tuner_ops.init(), if available.
		*
		* Once tuner and demods are resumed, it will enforce that the SEC voltage and
		* tone are restored to their previous values and wake up the frontend's
		* kthread in order to retune the frontend.
		*
		* The drivers should also call dvb_frontend_resume() as part of their
		* handler for the &device_driver.resume().
		*/
		int dvb_frontend_resume(struct dvb_frontend *fe);

		/**
		* dvb_frontend_reinitialise() - forces a reinitialisation at the frontend

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