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Commit 43ad2dc4 authored by Ajay Singh Parmar's avatar Ajay Singh Parmar Committed by Stephen Boyd
Browse files

mdss: hdmi: sysfs node for hdcp status 



The change provides the sysfs node to query hdcp authentication
status. "status" node under hdcp folder will be:
not available: if target doesn't support HDCP
0: inactive
1: authenticating
2: authentication pass
3: authentication fail

Change-Id: I685a25566cfee9cbc89b14263e30a4af3a410f7d
Signed-off-by: default avatarAjay Singh Parmar <aparmar@codeaurora.org>
parent 0db204ad

drivers/video/msm/mdss/mdss_hdmi_hdcp.c

+42 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <linux/types.h>

#include <linux/delay.h>

#include <linux/slab.h>

#include <linux/stat.h>



#include "mdss_hdmi_hdcp.h"
@@ -1171,6 +1172,38 @@ error: 
	return rc;

} /* hdmi_hdcp_isr */



static ssize_t hdmi_hdcp_sysfs_rda_status(struct device *dev,

			struct device_attribute *attr, char *buf)

{

	ssize_t ret;

	struct hdmi_hdcp_ctrl *hdcp_ctrl =

		hdmi_get_featuredata_from_sysfs_dev(dev, HDMI_TX_FEAT_HDCP);



	if (!hdcp_ctrl) {

		DEV_ERR("%s: invalid input\n", __func__);

		return -EINVAL;

	}



	mutex_lock(hdcp_ctrl->init_data.mutex);

	ret = snprintf(buf, PAGE_SIZE, "%d\n", hdcp_ctrl->hdcp_state);

	DEV_DBG("%s: '%d'\n", __func__, hdcp_ctrl->hdcp_state);

	mutex_unlock(hdcp_ctrl->init_data.mutex);



	return ret;

} /* hdmi_hdcp_sysfs_rda_hdcp*/



static DEVICE_ATTR(status, S_IRUGO, hdmi_hdcp_sysfs_rda_status, NULL);



static struct attribute *hdmi_hdcp_fs_attrs[] = {

	&dev_attr_status.attr,

	NULL,

};



static struct attribute_group hdmi_hdcp_fs_attr_group = {

	.name = "hdcp",

	.attrs = hdmi_hdcp_fs_attrs,

};



void hdmi_hdcp_deinit(void *input)

{

	struct hdmi_hdcp_ctrl *hdcp_ctrl = (struct hdmi_hdcp_ctrl *)input;
@@ -1180,6 +1213,9 @@ void hdmi_hdcp_deinit(void *input) 
		return;

	}



	sysfs_remove_group(hdcp_ctrl->init_data.sysfs_kobj,

				&hdmi_hdcp_fs_attr_group);



	kfree(hdcp_ctrl);

} /* hdmi_hdcp_deinit */
@@ -1203,6 +1239,12 @@ void *hdmi_hdcp_init(struct hdmi_hdcp_init_data *init_data) 


	hdcp_ctrl->init_data = *init_data;



	if (sysfs_create_group(init_data->sysfs_kobj,

				&hdmi_hdcp_fs_attr_group)) {

		DEV_ERR("%s: hdcp sysfs group creation failed\n", __func__);

		goto error;

	}



	INIT_DELAYED_WORK(&hdcp_ctrl->hdcp_auth_work, hdmi_hdcp_auth_work);

	INIT_WORK(&hdcp_ctrl->hdcp_int_work, hdmi_hdcp_int_work);

drivers/video/msm/mdss/mdss_hdmi_hdcp.h

+1 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ struct hdmi_hdcp_init_data { 
	struct dss_io_data *core_io;

	struct dss_io_data *qfprom_io;

	struct mutex *mutex;

	struct kobject *sysfs_kobj;

	struct workqueue_struct *workq;

	void *cb_data;

	void (*notify_status)(void *cb_data, enum hdmi_hdcp_state status);

drivers/video/msm/mdss/mdss_hdmi_tx.c

+1 −0
Original line number Diff line number Diff line
@@ -740,6 +740,7 @@ static int hdmi_tx_init_features(struct hdmi_tx_ctrl *hdmi_ctrl) 
		hdcp_init_data.qfprom_io =

			&hdmi_ctrl->pdata.io[HDMI_TX_QFPROM_IO];

		hdcp_init_data.mutex = &hdmi_ctrl->mutex;

		hdcp_init_data.sysfs_kobj = hdmi_ctrl->kobj;

		hdcp_init_data.ddc_ctrl = &hdmi_ctrl->ddc_ctrl;

		hdcp_init_data.workq = hdmi_ctrl->workq;

		hdcp_init_data.notify_status = hdmi_tx_hdcp_cb;