linux-kernel - [PATCH 2/2] firmware: qcom: scm: disable SDI on IPQ5018

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Message-Id: <20230518135945.2248451-2-robimarko@gmail.com>
Date:   Thu, 18 May 2023 15:59:45 +0200
From:   Robert Marko <robimarko@...il.com>
To:     agross@...nel.org, andersson@...nel.orgm, konrad.dybcio@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        quic_srichara@...cinc.com
Cc:     Robert Marko <robimarko@...il.com>
Subject: [PATCH 2/2] firmware: qcom: scm: disable SDI on IPQ5018

IPQ5018 seems to have SDI (Secure Debug Image) enabled by default which
prevents normal reboot from working causing the board to just hang after
reboot is called.

So, let disable SDI during SCM probe for IPQ5018.

Signed-off-by: Robert Marko <robimarko@...il.com>
---
 drivers/firmware/qcom_scm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index bdc9324d4e62..c6a38ce49fb0 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -1525,6 +1525,14 @@ static int qcom_scm_probe(struct platform_device *pdev)
 	if (download_mode)
 		qcom_scm_set_download_mode(true);
 
+	/* IPQ5018 seems to have SDI (Secure Debug Image) enabled by default
+	 * which will prevent normal reboot causing the board to hang after
+	 * making the reboot call.
+	 * So, make a call to SCM to disable SDI.
+	 */
+	if (of_machine_is_compatible("qcom,ipq5018"))
+		qcom_scm_disable_sdi();
+
 	return 0;
 }
 
-- 
2.40.1