From: Hosung Kim <hosung0.kim@samsung.com>
Date: Mon, 22 Oct 2018 11:26:35 +0000 (+0900)
Subject: [ERD][NEUS7920-76] [COMMON] lib: dss: support connected logging for platform log
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=574082a80b91d14975d902e0c85c980549e42792;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[ERD][NEUS7920-76] [COMMON] lib: dss: support connected logging for platform log

Change-Id: I448813459c3b931ad969bc031085c7ab95b3c36e
Signed-off-by: Hosung Kim <hosung0.kim@samsung.com>
---

diff --git a/lib/debug-snapshot-log.h b/lib/debug-snapshot-log.h
index 35fd4ac76ea7..64e066662d41 100644
--- a/lib/debug-snapshot-log.h
+++ b/lib/debug-snapshot-log.h
@@ -66,6 +66,7 @@
 #define DSS_OFFSET_SCRATCH		(0x100)
 #define DSS_OFFSET_DEBUG_LEVEL		(0x180)
 #define DSS_OFFSET_LAST_LOGBUF		(0x200)
+#define DSS_OFFSET_LAST_PLATFORM_LOGBUF	(0x280)
 #define DSS_OFFSET_EMERGENCY_REASON	(0x300)
 #define DSS_OFFSET_CORE_POWER_STAT	(0x400)
 #define DSS_OFFSET_PANIC_STAT		(0x500)
diff --git a/lib/debug-snapshot.c b/lib/debug-snapshot.c
index 1cdf89c5a1a5..9027ae5a32b1 100644
--- a/lib/debug-snapshot.c
+++ b/lib/debug-snapshot.c
@@ -197,10 +197,18 @@ static inline void dbg_snapshot_hook_logger(const char *name,
 	struct dbg_snapshot_item *item = &dss_items[dss_desc.log_platform_num];
 
 	if (likely(dss_base.enabled && item->entry.enabled)) {
+		size_t last_buf;
+
 		if (unlikely((dbg_snapshot_check_eob(item, size))))
 			item->curr_ptr = item->head_ptr;
+
 		memcpy(item->curr_ptr, buf, size);
 		item->curr_ptr += size;
+		/*  save the address of last_buf to physical address */
+		last_buf = (size_t)item->curr_ptr;
+
+		__raw_writel(item->entry.paddr + (last_buf - item->entry.vaddr),
+			dbg_snapshot_get_base_vaddr() + DSS_OFFSET_LAST_PLATFORM_LOGBUF);
 	}
 }
 
@@ -612,6 +620,16 @@ static void __init dbg_snapshot_fixmap(void)
 				/*  initialize logbuf to 0 */
 				memset((size_t *)vaddr, 0, size);
 			}
+		} else if (i == dss_desc.log_platform_num) {
+			last_buf = (size_t)__raw_readl(dbg_snapshot_get_base_vaddr() +
+							DSS_OFFSET_LAST_PLATFORM_LOGBUF);
+			if (last_buf >= dss_items[i].entry.vaddr &&
+				(last_buf) <= (dss_items[i].entry.vaddr + dss_items[i].entry.size)) {
+				dss_items[i].curr_ptr = (unsigned char *)(last_buf);
+			} else {
+				dss_items[i].curr_ptr = (unsigned char *)vaddr;
+				memset((size_t *)vaddr, 0, size);
+			}
 		} else {
 			/*  initialized log to 0 if persist == false */
 			if (!dss_items[i].entry.persist)