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ANDROID: usb: typec: tcpci: Add vendor hooks for tcpci interface

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Needed to implement chip specific features that are not defined
in the Type-C spec.

OOT_bug:
Bug: 169213252
Bug: 168245874
Bug: 173252019
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Change-Id: I36fe75dddd8cd4e2054db01ed4fee7ea08dd8702
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Badhri Jagan Sridharan
2021-03-17 15:02:21 -07:00
committed by Greg Kroah-Hartman
parent 892e618852
commit 08879ea0d6
3 changed files with 29 additions and 1 deletions
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2
drivers/android/vendor_hooks.c
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@@ -45,6 +45,7 @@
#include <trace/hooks/creds.h>
#include <trace/hooks/module.h>
#include <trace/hooks/memory.h>
#include <trace/hooks/typec.h>
/*
* Export tracepoints that act as a bare tracehook (ie: have no trace event
@@ -211,3 +212,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alloc_pages_slowpath);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_show_mem);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_print_slabinfo_header);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_cache_show);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_typec_tcpci_override_toggling);

6
drivers/usb/typec/tcpm/tcpci.c
View File

@@ -15,6 +15,7 @@
#include <linux/usb/pd.h>
#include <linux/usb/tcpm.h>
#include <linux/usb/typec.h>
#include <trace/hooks/typec.h>
#include "tcpci.h"
@@ -122,14 +123,17 @@ static int tcpci_start_toggling(struct tcpc_dev *tcpc,
int ret;
struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
unsigned int reg = TCPC_ROLE_CTRL_DRP;
int override_toggling = 0;
if (port_type != TYPEC_PORT_DRP)
return -EOPNOTSUPP;
/* Handle vendor drp toggling */
if (tcpci->data->start_drp_toggling) {
trace_android_vh_typec_tcpci_override_toggling(tcpci, tcpci->data,
&override_toggling);
ret = tcpci->data->start_drp_toggling(tcpci, tcpci->data, cc);
if (ret < 0)
if (ret < 0 || override_toggling)
return ret;
}

22
include/trace/hooks/typec.h Normal file
View File

@@ -0,0 +1,22 @@
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM typec
#define TRACE_INCLUDE_PATH trace/hooks
#if !defined(_TRACE_HOOK_TYPEC_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_HOOK_TYPEC_H
#include <linux/tracepoint.h>
#include <trace/hooks/vendor_hooks.h>
/*
* Following tracepoints are not exported in tracefs and provide a
* mechanism for vendor modules to hook and extend functionality
*/
struct tcpci;
struct tcpci_data;
DECLARE_HOOK(android_vh_typec_tcpci_override_toggling,
TP_PROTO(struct tcpci *tcpci, struct tcpci_data *data, int *override_toggling),
TP_ARGS(tcpci, data, override_toggling));
#endif /* _TRACE_HOOK_UFSHCD_H */
/* This part must be outside protection */
#include <trace/define_trace.h>