linux-kernel - [PATCH v2 4/4] firmware: qcom_scm: Add multiple download mode support

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Message-ID: <1677664555-30191-5-git-send-email-quic_mojha@quicinc.com>
Date:   Wed, 1 Mar 2023 15:25:55 +0530
From:   Mukesh Ojha <quic_mojha@...cinc.com>
To:     <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>
CC:     <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Mukesh Ojha" <quic_mojha@...cinc.com>
Subject: [PATCH v2 4/4] firmware: qcom_scm: Add multiple download mode support

Currently, scm driver only supports full dump when download
mode is selected. Add support to enable minidump as well both
dump(full dump + minidump).

Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>
---
 Changes in v2:
  - Accept mini/both as acceptable output.

 drivers/firmware/qcom_scm.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index ca07208..39e071a 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -27,6 +27,8 @@
 
 #define QCOM_DOWNLOAD_MODE_MASK 0x30
 #define QCOM_DOWNLOAD_FULLDUMP	0x10
+#define QCOM_DOWNLOAD_MINIDUMP	0x20
+#define QCOM_DOWNLOAD_BOTHDUMP	(QCOM_DOWNLOAD_FULLDUMP | QCOM_DOWNLOAD_MINIDUMP)
 #define QCOM_DOWNLOAD_NODUMP	0x0
 
 #define MAX_DLOAD_LEN	8
@@ -1350,6 +1352,10 @@ static int set_dload_mode(const char *val, const struct kernel_param *kp)
 
 	if (!strncmp(val, "full", strlen("full"))) {
 		dload_mode = QCOM_DOWNLOAD_FULLDUMP;
+	} else if (!strncmp(val, "mini", strlen("mini"))) {
+		dload_mode = QCOM_DOWNLOAD_MINIDUMP;
+	} else if (!strncmp(val, "both", strlen("both"))) {
+		dload_mode = QCOM_DOWNLOAD_BOTHDUMP;
 	} else if (!strncmp(val, "off", strlen("off"))) {
 		dload_mode = QCOM_DOWNLOAD_NODUMP;
 	} else {
@@ -1383,7 +1389,7 @@ static struct kparam_string dload_mode_param = {
 
 module_param_cb(download_mode, &dload_mode_param_ops, &dload_mode_param, 0644);
 MODULE_PARM_DESC(download_mode,
-		 "Download mode: off/full or 0/1/off/on for existing users");
+		 "download mode: off/full/mini/both(full+mini) or 0/1/off/on for existing users");
 
 static int qcom_scm_probe(struct platform_device *pdev)
 {
-- 
2.7.4