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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
*/
#define pr_fmt(fmt) "[drm-dp] %s: " fmt, __func__
#include <linux/slab.h>
#include <linux/device.h>
#include "dp_hpd.h"
/* DP specific VDM commands */
#define DP_USBPD_VDM_STATUS 0x10
#define DP_USBPD_VDM_CONFIGURE 0x11
/* USBPD-TypeC specific Macros */
#define VDM_VERSION 0x0
#define USB_C_DP_SID 0xFF01
struct dp_hpd_private {
struct device *dev;
struct dp_usbpd_cb *dp_cb;
struct dp_usbpd dp_usbpd;
};
int dp_hpd_connect(struct dp_usbpd *dp_usbpd, bool hpd)
{
int rc = 0;
struct dp_hpd_private *hpd_priv;
hpd_priv = container_of(dp_usbpd, struct dp_hpd_private,
dp_usbpd);
dp_usbpd->hpd_high = hpd;
if (!hpd_priv->dp_cb || !hpd_priv->dp_cb->configure
|| !hpd_priv->dp_cb->disconnect) {
pr_err("hpd dp_cb not initialized\n");
return -EINVAL;
}
if (hpd)
hpd_priv->dp_cb->configure(hpd_priv->dev);
else
hpd_priv->dp_cb->disconnect(hpd_priv->dev);
return rc;
}
struct dp_usbpd *dp_hpd_get(struct device *dev, struct dp_usbpd_cb *cb)
{
struct dp_hpd_private *dp_hpd;
if (!cb) {
pr_err("invalid cb data\n");
return ERR_PTR(-EINVAL);
}
dp_hpd = devm_kzalloc(dev, sizeof(*dp_hpd), GFP_KERNEL);
if (!dp_hpd)
return ERR_PTR(-ENOMEM);
dp_hpd->dev = dev;
dp_hpd->dp_cb = cb;
dp_hpd->dp_usbpd.connect = dp_hpd_connect;
return &dp_hpd->dp_usbpd;
}
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