drivers: nvs-dfsh: Add tracing for sensor events

Enable atraces for sensor events. This helps in monitoring
performance of sensor packets by injecting timestamps

AV-388

Change-Id: I923af58747d641d3c3067978a26f1297217b4a29
Reviewed-on: https://git-master.nvidia.com/r/1511854
Signed-off-by: Suril Dhruv <sdhruv@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1560224
Reviewed-by: Maneet Maneet Singh <mmaneetsingh@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>

1 files changed, 12 insertions, 3 deletions

diff --git a/drivers/misc/nvs-dfsh/nvs_dfsh.c b/drivers/misc/nvs-dfsh/nvs_dfsh.c
index df397e6ce..4b59fdd25 100644
--- a/drivers/misc/nvs-dfsh/nvs_dfsh.c
+++ b/drivers/misc/nvs-dfsh/nvs_dfsh.c
@@ -23,9 +23,12 @@
 #include <linux/nvs.h>
 #include <linux/crc32.h>
 #include <linux/time.h>
-
 #include "nvs_dfsh.h"
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/atrace.h>
+#define TRACE_SENSOR_ID                 (100)
+
 #define DFSH_DRIVER_VERSION             (1)
 #define DFSH_NAME                               "dfsh"
 #define DFSH_POR_DELAY_MS               (100)
@@ -498,6 +501,13 @@ static inline void dfsh_parse_pkt(struct tty_struct *tty, unsigned char c)
         static s64 prev_ktime;
         static s64 prev_mcutime;
         struct sensor_sync_pkt_t sensor_sync_pkt;
+        int cookie;
+
+        ktime_get_ts64(&k_ts);
+        k_ts_ns = timespec_to_ns(&k_ts);
+        cookie = (int) k_ts_ns;
+        trace_async_atrace_begin(__func__, TRACE_SENSOR_ID, cookie);
+
         /* sanity check index */
         if (st->pkt_byte_idx >= sizeof(st->pkt_buf))
                 /* Reset if byte index longer than longest packet */
@@ -543,8 +553,6 @@ static inline void dfsh_parse_pkt(struct tty_struct *tty, unsigned char c)
                                                sizeof(ts));
                                         /*convert timestamp from usec to nsec*/
                                         ts = ts * 1000;
-                                        ktime_get_ts64(&k_ts);
-                                        k_ts_ns = timespec_to_ns(&k_ts);
                                         if (prev_mcutime == ts)
                                                 k_ts_ns = prev_ktime;
                                         if (st->pkt.header.type == MSG_CAMERA) {
@@ -600,6 +608,7 @@ static inline void dfsh_parse_pkt(struct tty_struct *tty, unsigned char c)
                 }
                 break;
         }
+        trace_async_atrace_end(__func__, TRACE_SENSOR_ID, cookie);
 }
 
 static void dfsh_receive_buf(struct tty_struct *tty, const unsigned char *cp,