From: Zheng Yang <zhengyang@rock-chips.com>
Date: Thu, 21 May 2015 05:40:15 +0000 (+0800)
Subject: display-sys: debug node support to show debug information.
X-Git-Tag: firefly_0821_release~4142
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=57fc92cd719a8f54be58680f19e3110057d9a4f5;p=firefly-linux-kernel-4.4.55.git

display-sys: debug node support to show debug information.

	Add a callback function getdebug() to show debug information.

Signed-off-by: Zheng Yang <zhengyang@rock-chips.com>
---

diff --git a/drivers/video/rockchip/display-sys.c b/drivers/video/rockchip/display-sys.c
index bcf19988006e..8fd6926c67a9 100755
--- a/drivers/video/rockchip/display-sys.c
+++ b/drivers/video/rockchip/display-sys.c
@@ -364,7 +364,12 @@ static ssize_t display_show_monspecs(struct device *dev,
 static ssize_t display_show_debug(struct device *dev,
 				  struct device_attribute *attr, char *buf)
 {
-	return -EINVAL;
+	struct rk_display_device *dsp = dev_get_drvdata(dev);
+
+	if (dsp->ops && dsp->ops->getdebug)
+		return dsp->ops->getdebug(dsp, buf);
+	else
+		return -EINVAL;
 }
 
 static ssize_t display_store_debug(struct device *dev,
diff --git a/include/linux/display-sys.h b/include/linux/display-sys.h
index b229b9b2bab1..72a044ba5c1b 100755
--- a/include/linux/display-sys.h
+++ b/include/linux/display-sys.h
@@ -61,6 +61,7 @@ struct rk_display_ops {
 	int (*getcolor)(struct rk_display_device *, char *);
 	int (*setcolor)(struct rk_display_device *, const char *, int);
 	int (*setdebug)(struct rk_display_device *, int);
+	int (*getdebug)(struct rk_display_device *, char *);
 	int (*getedidaudioinfo)(struct rk_display_device *,
 				char *audioinfo, int len);
 	int (*getmonspecs)(struct rk_display_device *,