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From:   Mukesh Ojha <quic_mojha@quicinc.com>
To:     <agross@kernel.org>, <andersson@kernel.org>,
        <konrad.dybcio@linaro.org>, <linus.walleij@linaro.org>
CC:     <linux-arm-msm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-gpio@vger.kernel.org>, Mukesh Ojha <quic_mojha@quicinc.com>
Subject: [PATCH v5 5/5] firmware: qcom_scm: Add multiple download mode support
Date:   Tue, 28 Mar 2023 21:07:49 +0530
Message-ID: <1680017869-22421-6-git-send-email-quic_mojha@quicinc.com>
In-Reply-To: <1680017869-22421-1-git-send-email-quic_mojha@quicinc.com>
References: <1680017869-22421-1-git-send-email-quic_mojha@quicinc.com>
MIME-Version: 1.0
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Currently, scm driver only supports full dump when download
mode is selected. Add support to enable minidump as well as
enable it along with fulldump.

Signed-off-by: Mukesh Ojha <quic_mojha@quicinc.com>
---
 drivers/firmware/qcom_scm.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 53ee301..2a16431 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -32,6 +32,8 @@ static u32 download_mode;
 
 #define QCOM_DOWNLOAD_MODE_MASK 0x30
 #define QCOM_DOWNLOAD_FULLDUMP	0x1
+#define QCOM_DOWNLOAD_MINIDUMP  0x2
+#define QCOM_DOWNLOAD_BOTHDUMP	(QCOM_DOWNLOAD_FULLDUMP | QCOM_DOWNLOAD_MINIDUMP)
 #define QCOM_DOWNLOAD_NODUMP	0x0
 
 struct qcom_scm {
@@ -1420,13 +1422,16 @@ static irqreturn_t qcom_scm_irq_handler(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-
 static int get_download_mode(char *buffer, const struct kernel_param *kp)
 {
 	int len = 0;
 
 	if (download_mode == QCOM_DOWNLOAD_FULLDUMP)
 		len = sysfs_emit(buffer, "full\n");
+	else if (download_mode == QCOM_DOWNLOAD_MINIDUMP)
+		len = sysfs_emit(buffer, "mini\n");
+	else if (download_mode == QCOM_DOWNLOAD_BOTHDUMP)
+		len = sysfs_emit(buffer, "full,mini\n");
 	else if (download_mode == QCOM_DOWNLOAD_NODUMP)
 		len = sysfs_emit(buffer, "off\n");
 
@@ -1437,8 +1442,13 @@ static int set_download_mode(const char *val, const struct kernel_param *kp)
 {
 	u32 old = download_mode;
 
-	if (!strncmp(val, "full", strlen("full"))) {
+	if (!strncmp(val, "full,mini", strlen("full,mini")) ||
+	    !strncmp(val, "mini,full", strlen("mini,full"))) {
+		download_mode = QCOM_DOWNLOAD_BOTHDUMP;
+	} else if (!strncmp(val, "full", strlen("full"))) {
 		download_mode = QCOM_DOWNLOAD_FULLDUMP;
+	} else if (!strncmp(val, "mini", strlen("mini"))) {
+		download_mode = QCOM_DOWNLOAD_MINIDUMP;
 	} else if (!strncmp(val, "off", strlen("off"))) {
 		download_mode = QCOM_DOWNLOAD_NODUMP;
 	} else if (kstrtouint(val, 0, &download_mode) ||
@@ -1461,7 +1471,7 @@ static const struct kernel_param_ops download_mode_param_ops = {
 
 module_param_cb(download_mode, &download_mode_param_ops, NULL, 0644);
 MODULE_PARM_DESC(download_mode,
-		 "Download mode: off/full or 0/1 for existing users");
+		"download mode: off/full/mini/full,mini or mini,full and 0/1 for existing users");
 
 static int qcom_scm_probe(struct platform_device *pdev)
 {
-- 
2.7.4