video: s3c-fb: modify runtime pm functions

Runtime suspend and runtime resume are modified in order to
reduce the complexity and improve the usability of runtime pm.
After probe function, s3c-fb driver is not suspended until
suspend or remove is called.

The scheme is changed as follows:
 runtime_get is only called in probe and resume.
 runtime_put is only called in remove and suspend.
 open/close cannot call the runtime_get/put.

Also, runtime_susepnd/resume are just called by runtime pm,
not doing suspend/resume routine any longer. This is because
open/close cannot call the runtime_get/put; the suspend/resume
routine in runtime_suspend/resume were previously used when
open and close were called.

The name of s3c-fb dev_pm_ops is changed from s3cfb_pm_ops to
s3c_fb_pm_ops in order to use more consistent naming.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

drivers/video/s3c-fb.c

@@ -1029,30 +1029,8 @@ static int s3c_fb_ioctl(struct fb_info *info, unsigned int cmd,
 	return ret;
 }
 
-static int s3c_fb_open(struct fb_info *info, int user)
-{
-	struct s3c_fb_win *win = info->par;
-	struct s3c_fb *sfb = win->parent;
-
-	pm_runtime_get_sync(sfb->dev);
-
-	return 0;
-}
-
-static int s3c_fb_release(struct fb_info *info, int user)
-{
-	struct s3c_fb_win *win = info->par;
-	struct s3c_fb *sfb = win->parent;
-
-	pm_runtime_put_sync(sfb->dev);
-
-	return 0;
-}
-
 static struct fb_ops s3c_fb_ops = {
 	.owner		= THIS_MODULE,
-	.fb_open	= s3c_fb_open,
-	.fb_release	= s3c_fb_release,
 	.fb_check_var	= s3c_fb_check_var,
 	.fb_set_par	= s3c_fb_set_par,
 	.fb_blank	= s3c_fb_blank,
@@ -1459,7 +1437,6 @@ static int __devinit s3c_fb_probe(struct platform_device *pdev)
 	}
 
 	platform_set_drvdata(pdev, sfb);
-	pm_runtime_put_sync(sfb->dev);
 
 	return 0;
 
@@ -1499,8 +1476,6 @@ static int __devexit s3c_fb_remove(struct platform_device *pdev)
 	struct s3c_fb *sfb = platform_get_drvdata(pdev);
 	int win;
 
-	pm_runtime_get_sync(sfb->dev);
-
 	for (win = 0; win < S3C_FB_MAX_WIN; win++)
 		if (sfb->windows[win])
 			s3c_fb_release_win(sfb, sfb->windows[win]);
@@ -1526,7 +1501,7 @@ static int __devexit s3c_fb_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int s3c_fb_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
@@ -1547,6 +1522,8 @@ static int s3c_fb_suspend(struct device *dev)
 		clk_disable(sfb->lcd_clk);
 
 	clk_disable(sfb->bus_clk);
+	pm_runtime_put_sync(sfb->dev);
+
 	return 0;
 }
 
@@ -1558,6 +1535,7 @@ static int s3c_fb_resume(struct device *dev)
 	struct s3c_fb_win *win;
 	int win_no;
 
+	pm_runtime_get_sync(sfb->dev);
 	clk_enable(sfb->bus_clk);
 
 	if (!sfb->variant.has_clksel)
@@ -1591,11 +1569,19 @@ static int s3c_fb_resume(struct device *dev)
 
 	return 0;
 }
-#else
-#define s3c_fb_suspend NULL
-#define s3c_fb_resume  NULL
 #endif
 
+#ifdef CONFIG_PM_RUNTIME
+static int s3c_fb_runtime_suspend(struct device *dev)
+{
+	return 0;
+}
+
+static int s3c_fb_runtime_resume(struct device *dev)
+{
+	return 0;
+}
+#endif
 
 #define VALID_BPP124 (VALID_BPP(1) | VALID_BPP(2) | VALID_BPP(4))
 #define VALID_BPP1248 (VALID_BPP124 | VALID_BPP(8))
@@ -1918,7 +1904,10 @@ static struct platform_device_id s3c_fb_driver_ids[] = {
 };
 MODULE_DEVICE_TABLE(platform, s3c_fb_driver_ids);
 
-static UNIVERSAL_DEV_PM_OPS(s3cfb_pm_ops, s3c_fb_suspend, s3c_fb_resume, NULL);
+static const struct dev_pm_ops s3c_fb_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(s3c_fb_suspend, s3c_fb_resume)
+	SET_RUNTIME_PM_OPS(s3c_fb_runtime_suspend, s3c_fb_runtime_resume, NULL)
+};
 
 static struct platform_driver s3c_fb_driver = {
 	.probe		= s3c_fb_probe,
@@ -1927,7 +1916,7 @@ static struct platform_driver s3c_fb_driver = {
 	.driver		= {
 		.name	= "s3c-fb",
 		.owner	= THIS_MODULE,
-		.pm	= &s3cfb_pm_ops,
+		.pm	= &s3c_fb_pm_ops,
 	},
 };