From: Changki Kim <changki.kim@samsung.com>
Date: Tue, 26 Mar 2019 11:20:46 +0000 (+0900)
Subject: [ERD][RAMEN9610-14963] [COMMON] lib: dss: Change debug level policy.
X-Git-Tag: MMI-QSAS30.62-33-3~746
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2b577af2c4c16c3b035d08e395d2a085a8b99716;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

[ERD][RAMEN9610-14963] [COMMON] lib: dss: Change debug level policy.

debug level is related with ramdump.
low: if error(like panic, wdtreset ..) happened,
     system does not enter fastboot mode.
mid: system enters fastboot mode.

debug level is determined in bootloader.

Change-Id: I9186dc97ee7591ef2f4e888da488602141779ebf
Signed-off-by: Changki Kim <changki.kim@samsung.com>
---

diff --git a/include/linux/debug-snapshot.h b/include/linux/debug-snapshot.h
index 0ee303467fa7..0acc2a59dd8f 100644
--- a/include/linux/debug-snapshot.h
+++ b/include/linux/debug-snapshot.h
@@ -39,9 +39,7 @@ extern int dbg_snapshot_post_panic(void);
 extern int dbg_snapshot_post_reboot(char *cmd);
 extern int dbg_snapshot_set_hardlockup(int);
 extern int dbg_snapshot_get_hardlockup(void);
-extern int dbg_snapshot_set_debug_level(int);
 extern int dbg_snapshot_get_debug_level(void);
-extern void dbg_snapshot_set_debug_level_reg(void);
 extern int dbg_snapshot_get_debug_level_reg(void);
 extern unsigned int dbg_snapshot_get_item_size(char *);
 extern unsigned int dbg_snapshot_get_item_paddr(char *);
@@ -217,8 +215,8 @@ extern void dbg_snapshot_binder(struct trace_binder_transaction_base *base,
 #define dbg_snapshot_post_reboot(a)	do { } while(0)
 #define dbg_snapshot_set_hardlockup(a)	do { } while(0)
 #define dbg_snapshot_get_hardlockup()	do { } while(0)
-#define dbg_snapshot_set_debug_level(a) do { } while(0)
 #define dbg_snapshot_get_debug_level()	do { } while(0)
+#define dbg_snapshot_get_debug_level_reg()     do { } while (0)
 #define dbg_snapshot_check_crash_key(a,b)	do { } while(0)
 #define dbg_snapshot_dm(a,b,c,d,e)		do { } while(0)
 #define dbg_snapshot_panic_handler_safe()	do { } while(0)
@@ -301,7 +299,6 @@ enum dsslog_freq_flag {
 	DSS_FLAG_END
 };
 
-#define DSS_DEBUG_LEVEL_NONE	(-1)
 #define DSS_DEBUG_LEVEL_PREFIX	(0xDB9 << 16)
 #define DSS_DEBUG_LEVEL_LOW	(0)
 #define DSS_DEBUG_LEVEL_MID	(1)
diff --git a/lib/debug-snapshot-helper.c b/lib/debug-snapshot-helper.c
index 8a42d09092bf..7f464ee04c04 100644
--- a/lib/debug-snapshot-helper.c
+++ b/lib/debug-snapshot-helper.c
@@ -104,16 +104,9 @@ static void dbg_snapshot_report_reason(unsigned int val)
 		__raw_writel(val, dbg_snapshot_get_base_vaddr() + DSS_OFFSET_EMERGENCY_REASON);
 }
 
-void dbg_snapshot_set_debug_level_reg(void)
-{
-	if (dbg_snapshot_get_enable("header"))
-		__raw_writel(dss_desc.debug_level | DSS_DEBUG_LEVEL_PREFIX,
-			dbg_snapshot_get_base_vaddr() + DSS_OFFSET_DEBUG_LEVEL);
-}
-
 int dbg_snapshot_get_debug_level_reg(void)
 {
-	int ret = DSS_DEBUG_LEVEL_NONE;
+	int ret = DSS_DEBUG_LEVEL_MID;
 
 	if (dbg_snapshot_get_enable("header")) {
 		int val = __raw_readl(dbg_snapshot_get_base_vaddr() + DSS_OFFSET_DEBUG_LEVEL);
diff --git a/lib/debug-snapshot.c b/lib/debug-snapshot.c
index 201824b8581e..f38f4fa07302 100644
--- a/lib/debug-snapshot.c
+++ b/lib/debug-snapshot.c
@@ -83,21 +83,6 @@ struct dbg_snapshot_desc dss_desc;
 /* Variable for assigning virtual address base */
 static size_t g_dbg_snapshot_vaddr_base = DSS_FIXED_VIRT_BASE;
 
-int dbg_snapshot_set_debug_level(int level)
-{
-	if (level > -1 && level < ARRAY_SIZE(debug_level_val)) {
-		dss_desc.debug_level = level;
-	} else {
-#if !IS_ENABLED(CONFIG_DEBUG_SNAPSHOT_USER_MODE)
-		dss_desc.debug_level = DSS_DEBUG_LEVEL_MID;
-#else
-		dss_desc.debug_level = DSS_DEBUG_LEVEL_LOW;
-#endif
-	}
-	dbg_snapshot_set_debug_level_reg();
-	return 0;
-}
-
 int dbg_snapshot_get_debug_level(void)
 {
 	return dss_desc.debug_level;
@@ -748,14 +733,13 @@ static int __init dbg_snapshot_init_dt(void)
 
 static int __init dbg_snapshot_init_value(void)
 {
-	int val = dbg_snapshot_get_debug_level_reg();
-
-	dbg_snapshot_set_debug_level(val);
+	dss_desc.debug_level = dbg_snapshot_get_debug_level_reg();
 
 	pr_info("debug-snapshot: debug_level [%s]\n",
 		debug_level_val[dss_desc.debug_level]);
 
-	dbg_snapshot_scratch_reg(DSS_SIGN_SCRATCH);
+	if (dss_desc.debug_level != DSS_DEBUG_LEVEL_LOW)
+		dbg_snapshot_scratch_reg(DSS_SIGN_SCRATCH);
 
 	/* copy linux_banner, physical address of
 	 * kernel log / platform log / kevents to DSS header */