touch:fts: Enable noise log when the touch scanning frequency changed

Enable noise log for helping engineer debug issues.

Bug: 149259238
Test: There are related logs when the scanning frequency changed.

Change-Id: I781234debc3a22b85dab4e78aabbc39c706c17d1
Signed-off-by: davidycchen <davidycchen@google.com>

2 files changed, 14 insertions, 3 deletions

diff --git a/fts.c b/fts.c
index 12759d1..724739a 100644
--- a/fts.c
+++ b/fts.c
@@ -3305,9 +3305,18 @@ static bool fts_status_event_handler(struct fts_ts_info *info, unsigned
 		break;
 
 	case EVT_TYPE_STATUS_NOISE:
-		pr_debug("%s: Noise Status Event = %02X %02X %02X %02X %02X %02X\n",
-			__func__, event[2], event[3], event[4], event[5],
-			event[6], event[7]);
+		if(info->scanning_frequency != event[3]) {
+			pr_info("%s: Scanning frequency changed from %02X to %02X\n",
+				__func__, info->scanning_frequency, event[3]);
+			pr_info("%s: Noise Status Event = %02X %02X %02X %02X %02X %02X\n",
+				__func__, event[2], event[3],
+				event[4], event[5], event[6], event[7]);
+			info->scanning_frequency = event[3];
+		} else {
+			pr_debug("%s: Noise Status Event = %02X %02X %02X %02X %02X %02X\n",
+				__func__, event[2], event[3], event[4],
+				event[5], event[6], event[7]);
+		}
 		break;
 
 	case EVT_TYPE_STATUS_STIMPAD:
diff --git a/fts.h b/fts.h
index 80f2426..0dd5a29 100644
--- a/fts.h
+++ b/fts.h
@@ -483,6 +483,8 @@ struct fts_ts_info {
 	/* Touch simulation details */
 	struct fts_touchsim touchsim;
 
+	u8 scanning_frequency;
+
 	/* Preallocated i/o read buffer */
 	u8 io_read_buf[READ_CHUNK + DUMMY_FIFO];
 	/* Preallocated i/o write buffer */