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From: Maharaja Kennadyrajan <>
	Vikas Patel <>,
	Maharaja Kennadyrajan <>
Subject: [PATCH] ath10k: avoid consecutive OTP download to reduce boot time
Date: Tue,  7 Jan 2020 11:53:15 +0530	[thread overview]
Message-ID: <> (raw)

From: Vikas Patel <>

Currently, OTP is downloaded twice in case of "pre-cal-dt"
and "pre-cal-file" to fetch the board ID and takes around
~2 sec more boot uptime.

First OTP download happens in "ath10k_core_probe_fw" and
second in ath10k_core_start. First boot does not need OTP
download in core start when valid board id acquired.

The second OTP download is required upon core stop/start.

This patch skips the OTP download when first OTP download
has acquired a valid board id. This patch also marks board
id invalid in "ath10k_core_stop", which will force the OTP
download in ath10k_core_start and fetches valid board id.

Tested HW: QCA9984
Tested FW: 10.4-3.6-00104

Signed-off-by: Vikas Patel <>
Signed-off-by: Maharaja Kennadyrajan <>
 drivers/net/wireless/ath/ath10k/core.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 5ec16ce..8fef991 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -874,6 +874,13 @@ static int ath10k_core_get_board_id_from_otp(struct ath10k *ar)
 		return -ENODATA;
+	if (ar->id.bmi_ids_valid) {
+		ath10k_dbg(ar, ATH10K_DBG_BOOT,
+			   "boot already acquired valid otp board id,skip download, board_id %d chip_id %d\n",
+			   ar->id.bmi_board_id, ar->id.bmi_chip_id);
+		goto skip_otp_download;
+	}
 	ath10k_dbg(ar, ATH10K_DBG_BOOT,
 		   "boot upload otp to 0x%x len %zd for board id\n",
 		   address, ar->normal_mode_fw.fw_file.otp_len);
@@ -921,6 +928,8 @@ static int ath10k_core_get_board_id_from_otp(struct ath10k *ar)
 	ar->id.bmi_board_id = board_id;
 	ar->id.bmi_chip_id = chip_id;
 	return 0;
@@ -2863,6 +2872,8 @@ void ath10k_core_stop(struct ath10k *ar)
+	ar->id.bmi_ids_valid = false;

             reply	other threads:[~2020-01-07  6:23 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-07  6:23 Maharaja Kennadyrajan [this message]
2020-01-07  7:00 ` Maharaja Kennadyrajan
2020-02-13 14:13   ` Kalle Valo
2020-02-14  5:46     ` Maharaja Kennadyrajan
2020-03-11 16:31 ` Kalle Valo

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