linux-kernel - [PATCH v12 4/9] firmware: qcom: scm: Rework dload mode availability check

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Message-ID: <20240227155308.18395-5-quic_mojha@quicinc.com>
Date: Tue, 27 Feb 2024 21:23:03 +0530
From: Mukesh Ojha <quic_mojha@...cinc.com>
To: <andersson@...nel.org>, <konrad.dybcio@...aro.org>
CC: <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linus.walleij@...aro.org>, <linux-gpio@...r.kernel.org>,
        Mukesh Ojha
	<quic_mojha@...cinc.com>,
        Elliot Berman <quic_eberman@...cinc.com>
Subject: [PATCH v12 4/9] firmware: qcom: scm: Rework dload mode availability check

QCOM_SCM_BOOT_SET_DLOAD_MODE was only valid for very older
target and firmware and for recent targets there is dload
mode tcsr registers available to set the download mode.

So, it is better to keep it as fallback check instead of
checking its availability and failing it always.

Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>
Reviewed-by: Elliot Berman <quic_eberman@...cinc.com>
---
 drivers/firmware/qcom/qcom_scm.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c
index bd6bfdf2d828..3fd89cddba3b 100644
--- a/drivers/firmware/qcom/qcom_scm.c
+++ b/drivers/firmware/qcom/qcom_scm.c
@@ -540,18 +540,16 @@ static int __qcom_scm_set_dload_mode(struct device *dev, bool enable)
 static void qcom_scm_set_download_mode(bool enable)
 {
 	u32 val = enable ? QCOM_DLOAD_FULLDUMP : QCOM_DLOAD_NODUMP;
-	bool avail;
 	int ret = 0;
 
-	avail = __qcom_scm_is_call_available(__scm->dev,
-					     QCOM_SCM_SVC_BOOT,
-					     QCOM_SCM_BOOT_SET_DLOAD_MODE);
-	if (avail) {
-		ret = __qcom_scm_set_dload_mode(__scm->dev, enable);
-	} else if (__scm->dload_mode_addr) {
+	if (__scm->dload_mode_addr) {
 		ret = qcom_scm_io_rmw(__scm->dload_mode_addr,
 				      QCOM_DLOAD_MASK,
 				      FIELD_PREP(QCOM_DLOAD_MASK, val));
+	} else if (__qcom_scm_is_call_available(__scm->dev,
+						QCOM_SCM_SVC_BOOT,
+						QCOM_SCM_BOOT_SET_DLOAD_MODE)) {
+		ret = __qcom_scm_set_dload_mode(__scm->dev, enable);
 	} else {
 		dev_err(__scm->dev,
 			"No available mechanism for setting download mode\n");
-- 
2.43.0.254.ga26002b62827