[PATCH v6 5/5] firmware: qcom_scm: Add multiple download mode support

Mukesh Ojha
2023-03-29T07:47:48Z

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 | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index fa6502a..780e50a 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 +1442,12 @@ static int set_download_mode(const char *val, const struct kernel_param *kp)
{
u32 old = download_mode;

- if (sysfs_streq(val, "full")) {
+ if (sysfs_streq(val, "full,mini") || sysfs_streq(val, "mini,full")) {
+ download_mode = QCOM_DOWNLOAD_BOTHDUMP;
+ } else if (sysfs_streq(val, "full")) {
download_mode = QCOM_DOWNLOAD_FULLDUMP;
+ } else if (sysfs_streq(val, "mini")) {
+ download_mode = QCOM_DOWNLOAD_MINIDUMP;
} else if (sysfs_streq(val, "off")) {
download_mode = QCOM_DOWNLOAD_NODUMP;
} else if (kstrtouint(val, 0, &download_mode) ||
@@ -1461,7 +1470,7 @@ 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