11a51b0ef5
Return ERR_PTR with -ENODEV when the USBPD module is not enabled. This allows the DP driver to handle the failure correctly and prevents any potential NULL pointer dereferencing in the clean up path. Change-Id: I4fbc559276bebe770a27935243a59c10c1bb5491 Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>
76 satır
1.9 KiB
C
76 satır
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _DP_USBPD_H_
|
|
#define _DP_USBPD_H_
|
|
|
|
#include <linux/types.h>
|
|
#include "dp_hpd.h"
|
|
|
|
struct device;
|
|
|
|
/**
|
|
* enum dp_usbpd_port - usb/dp port type
|
|
* @DP_USBPD_PORT_NONE: port not configured
|
|
* @DP_USBPD_PORT_UFP_D: Upstream Facing Port - DisplayPort
|
|
* @DP_USBPD_PORT_DFP_D: Downstream Facing Port - DisplayPort
|
|
* @DP_USBPD_PORT_D_UFP_D: Both UFP & DFP - DisplayPort
|
|
*/
|
|
|
|
enum dp_usbpd_port {
|
|
DP_USBPD_PORT_NONE,
|
|
DP_USBPD_PORT_UFP_D,
|
|
DP_USBPD_PORT_DFP_D,
|
|
DP_USBPD_PORT_D_UFP_D,
|
|
};
|
|
|
|
/**
|
|
* struct dp_usbpd - DisplayPort status
|
|
*
|
|
* @port: port configured
|
|
* @low_pow_st: low power state
|
|
* @adaptor_dp_en: adaptor functionality enabled
|
|
* @usb_config_req: request to switch to usb
|
|
* @exit_dp_mode: request exit from displayport mode
|
|
* @debug_en: bool to specify debug mode
|
|
*/
|
|
struct dp_usbpd {
|
|
struct dp_hpd base;
|
|
enum dp_usbpd_port port;
|
|
bool low_pow_st;
|
|
bool adaptor_dp_en;
|
|
bool usb_config_req;
|
|
bool exit_dp_mode;
|
|
bool debug_en;
|
|
};
|
|
|
|
#if IS_ENABLED(CONFIG_DRM_MSM_DP_USBPD_LEGACY)
|
|
/**
|
|
* dp_usbpd_get() - setup usbpd module
|
|
*
|
|
* @dev: device instance of the caller
|
|
* @cb: struct containing callback function pointers.
|
|
*
|
|
* This function allows the client to initialize the usbpd
|
|
* module. The module will communicate with usb driver and
|
|
* handles the power delivery (PD) communication with the
|
|
* sink/usb device. This module will notify the client using
|
|
* the callback functions about the connection and status.
|
|
*/
|
|
struct dp_hpd *dp_usbpd_get(struct device *dev, struct dp_hpd_cb *cb);
|
|
void dp_usbpd_put(struct dp_hpd *pd);
|
|
#else
|
|
static inline struct dp_hpd *dp_usbpd_get(struct device *dev,
|
|
struct dp_hpd_cb *cb)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static inline void dp_usbpd_put(struct dp_hpd *pd)
|
|
{
|
|
}
|
|
#endif /* CONFIG_DRM_MSM_DP_USBPD_LEGACY */
|
|
#endif /* _DP_USBPD_H_ */
|