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Commit 9ca8dc32 authored by Vignesh Kulothungan's avatar Vignesh Kulothungan Committed by Gerrit - the friendly Code Review server
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soc: soundwire: Add support to listen for DC detection 



Add support to listen for DC detection event.
Shutdown WSA on receiving DC detection event.

CRs-Fixed: 2244131
Change-Id: Ifecab8bb9862976a647a161bad4c202b6e6459c7
Signed-off-by: default avatarVignesh Kulothungan <vigneshk@codeaurora.org>
parent 94bd8731

soc/swr-wcd-ctrl.c

+32 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/uaccess.h>

#include <soc/soundwire.h>

#include <soc/swr-wcd.h>

#include <dsp/msm-audio-event-notify.h>

#include "swrm_registers.h"

#include "swr-wcd-ctrl.h"
@@ -1393,6 +1394,32 @@ static int swrm_master_init(struct swr_mstr_ctrl *swrm) 
	return ret;

}



static int swrm_event_notify(struct notifier_block *self,

				unsigned long action, void *data)

{

	struct swr_mstr_ctrl *swrm = container_of(self, struct swr_mstr_ctrl,

							event_notifier);

	if (!swrm || !swrm->pdev) {

		pr_err("%s: swrm or pdev is NULL\n", __func__);

		return -EINVAL;

	}

	if (action != MSM_AUD_DC_EVENT) {

		dev_err(&swrm->pdev->dev, "%s: invalid event type: %lu\n", __func__, action);

		return -EINVAL;

	}



	schedule_work(&(swrm->dc_presence_work));



	return 0;

}



static void swrm_notify_work_fn(struct work_struct *work)

{

	struct swr_mstr_ctrl *swrm = container_of(work, struct swr_mstr_ctrl,

							dc_presence_work);

	swrm_wcd_notify(swrm->pdev, SWR_DEVICE_DOWN, NULL);

}



static int swrm_probe(struct platform_device *pdev)

{

	struct swr_mstr_ctrl *swrm;
@@ -1553,6 +1580,10 @@ static int swrm_probe(struct platform_device *pdev) 
	pm_runtime_enable(&pdev->dev);

	pm_runtime_mark_last_busy(&pdev->dev);



	INIT_WORK(&swrm->dc_presence_work, swrm_notify_work_fn);

	swrm->event_notifier.notifier_call  = swrm_event_notify;

	msm_aud_evt_register_client(&swrm->event_notifier);



	return 0;

err_mstr_fail:

	swrm->reg_irq(swrm->handle, swr_mstr_interrupt,
@@ -1583,6 +1614,7 @@ static int swrm_remove(struct platform_device *pdev) 
	pm_runtime_disable(&pdev->dev);

	pm_runtime_set_suspended(&pdev->dev);

	swr_unregister_master(&swrm->master);

	msm_aud_evt_unregister_client(&swrm->event_notifier);

	mutex_destroy(&swrm->mlock);

	mutex_destroy(&swrm->reslock);

	mutex_destroy(&swrm->force_down_lock);

soc/swr-wcd-ctrl.h

+3 −0
Original line number Diff line number Diff line
@@ -108,6 +108,9 @@ struct swr_mstr_ctrl { 
	u8 num_cfg_devs;

	struct mutex force_down_lock;

	int force_down_state;



	struct notifier_block event_notifier;

	struct work_struct dc_presence_work;

};



#endif /* _SWR_WCD_CTRL_H */