From: Erik Gilling <konkers@android.com>
Date: Tue, 15 Feb 2011 01:18:37 +0000 (-0800)
Subject: HACK: dump clock tree on nvhost suspend hang
X-Git-Tag: firefly_0821_release~9834^2~115
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=254b5e1c65cd70f16f44f7f2e7ee2b2b76cebecc;p=firefly-linux-kernel-4.4.55.git

HACK: dump clock tree on nvhost suspend hang

Change-Id: Iaf3075535fa6a100389a0b02508a0b7bc45e8ff9
Signed-off-by: Erik Gilling <konkers@android.com>
---

diff --git a/arch/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c
index e97cc2532aef..964c4c39ddd0 100644
--- a/arch/arm/mach-tegra/clock.c
+++ b/arch/arm/mach-tegra/clock.c
@@ -832,6 +832,36 @@ err_out:
 	return -ENOMEM;
 }
 
+static char tegra_clk_dump_buff[16 * 1024];
+
+void tegra_clk_dump(void)
+{
+	struct seq_file s;
+	int i;
+	char c;
+
+	memset(&s, 0x0, sizeof(s));
+
+	s.buf = tegra_clk_dump_buff;
+	s.size = sizeof(tegra_clk_dump_buff);
+
+	clock_tree_show(&s, NULL);
+
+	i = 0;
+	while (i < s.count ) {
+		if ((s.count - i) > 256) {
+			c = s.buf[i + 256];
+			s.buf[i + 256] = 0;
+			printk("%s", s.buf + i);
+			s.buf[i + 256] = c;
+		} else {
+			printk("%s", s.buf + i);
+		}
+		i += 256;
+	}
+}
+
+
 static int clk_debugfs_register(struct clk *c)
 {
 	int err;
diff --git a/drivers/video/tegra/host/nvhost_acm.c b/drivers/video/tegra/host/nvhost_acm.c
index ef8f1ea2c13a..aac2757f7ca0 100644
--- a/drivers/video/tegra/host/nvhost_acm.c
+++ b/drivers/video/tegra/host/nvhost_acm.c
@@ -194,14 +194,18 @@ static int is_module_idle(struct nvhost_module *mod)
 	return (count == 0);
 }
 
+void tegra_clk_dump(void);
+
 void nvhost_module_suspend(struct nvhost_module *mod)
 {
 	int ret;
 
 	ret = wait_event_timeout(mod->idle, is_module_idle(mod),
 			   ACM_TIMEOUT + msecs_to_jiffies(500));
-	if (ret == 0)
+	if (ret == 0) {
+		tegra_clk_dump();
 		nvhost_debug_dump();
+	}
 	flush_delayed_work(&mod->powerdown);
 	BUG_ON(mod->powered);
 }