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msm: camera: utils: Route camera logs to ftrace

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Add debugfs setting to route camera logs : ERR,
WARN, INFO, DBG to ftrace.
Add CAM_TRACE macro for adding any new traces in drivers.

Usage:
CAM_TRACE : By default printed in ftrace
CAM_ERR, CAM_WARN, CAM_INFO, CAM_DBG : enable using
debugfs debug_type = 1 or 2
For CAM_DBG : In addition to above enable debug_mdl with
required mask.

adb shell "echo <value> > /sys/module/camera/parameters/debug_type"
All CAM_xx (except CAM_TRACE) logs are routed as below :
0 (default) - only logcat
1 - only ftrace
2 - both logcat and ftrace.

CRs-Fixed: 2762931
Change-Id: I5254a7fef346c7ba21a3ea1eed21e5353f42fd03
Signed-off-by: Pavan Kumar Chilamkurthi <pchilamk@codeaurora.org>
This commit is contained in:
Pavan Kumar Chilamkurthi
2020-08-25 04:13:14 -07:00
parent 80e8ff8cff
commit ca73e251f0
3 changed files with 216 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

77
drivers/cam_utils/cam_debug_util.c
View File

@@ -6,11 +6,17 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/module.h>
#include "cam_trace.h"
#include "cam_debug_util.h"
static uint debug_mdl;
module_param(debug_mdl, uint, 0644);
/* 0x0 - only logs, 0x1 - only trace, 0x2 - logs + trace */
static uint debug_type;
module_param(debug_type, uint, 0644);
struct camera_debug_settings cam_debug;
const struct camera_debug_settings *cam_debug_get_settings()
@@ -217,6 +223,34 @@ const char *cam_get_module_name(unsigned int module_id)
return name;
}
const char *cam_get_tag_name(unsigned int tag_id)
{
const char *name = NULL;
switch (tag_id) {
case CAM_TYPE_TRACE:
name = "CAM_TRACE";
break;
case CAM_TYPE_ERR:
name = "CAM_ERR";
break;
case CAM_TYPE_WARN:
name = "CAM_WARN";
break;
case CAM_TYPE_INFO:
name = "CAM_INFO";
break;
case CAM_TYPE_DBG:
name = "CAM_DBG";
break;
default:
name = "CAM";
break;
}
return name;
}
void cam_debug_log(unsigned int module_id, const char *func, const int line,
const char *fmt, ...)
{
@@ -227,10 +261,47 @@ void cam_debug_log(unsigned int module_id, const char *func, const int line,
if (debug_mdl & module_id) {
vsnprintf(str_buffer, STR_BUFFER_MAX_LENGTH, fmt, args);
pr_info("CAM_DBG: %s: %s: %d: %s\n",
cam_get_module_name(module_id),
func, line, str_buffer);
if ((debug_type == 0) || (debug_type == 2)) {
pr_info("CAM_DBG: %s: %s: %d: %s\n",
cam_get_module_name(module_id),
func, line, str_buffer);
}
if ((debug_type == 1) || (debug_type == 2)) {
char trace_buffer[STR_BUFFER_MAX_LENGTH];
snprintf(trace_buffer, sizeof(trace_buffer),
"%s: %s: %s: %d: %s",
cam_get_tag_name(CAM_TYPE_DBG),
cam_get_module_name(module_id),
func, line, str_buffer);
trace_cam_log_debug(trace_buffer);
}
}
va_end(args);
}
void cam_debug_trace(unsigned int tag, unsigned int module_id,
const char *func, const int line, const char *fmt, ...)
{
char str_buffer[STR_BUFFER_MAX_LENGTH];
va_list args;
if ((tag == CAM_TYPE_TRACE) || (debug_type == 1) || (debug_type == 2)) {
char trace_buffer[STR_BUFFER_MAX_LENGTH];
va_start(args, fmt);
vsnprintf(str_buffer, STR_BUFFER_MAX_LENGTH, fmt, args);
snprintf(trace_buffer, sizeof(trace_buffer),
"%s: %s: %s: %d: %s",
cam_get_tag_name(tag), cam_get_module_name(module_id),
func, line, str_buffer);
trace_cam_log_debug(trace_buffer);
va_end(args);
}
}