video: s3c-fb: add runtime_get/put to suspend/resume

This patch adds runtime_get/put to suspend/resume, which should be
necessary to prevent the problem to access the fimd register
without block power on.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c
index 18c84b8d45b5..ecb82bb4e606 100644
--- a/drivers/video/s3c-fb.c
+++ b/drivers/video/s3c-fb.c
@@ -1557,6 +1557,8 @@ static int s3c_fb_suspend(struct device *dev)
         struct s3c_fb_win *win;
         int win_no;
 
+        pm_runtime_get_sync(sfb->dev);
+
         for (win_no = S3C_FB_MAX_WIN - 1; win_no >= 0; win_no--) {
                 win = sfb->windows[win_no];
                 if (!win)
@@ -1570,6 +1572,9 @@ 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;
 }
 
@@ -1582,6 +1587,8 @@ static int s3c_fb_resume(struct device *dev)
         int win_no;
         u32 reg;
 
+        pm_runtime_get_sync(sfb->dev);
+
         clk_enable(sfb->bus_clk);
 
         if (!sfb->variant.has_clksel)
@@ -1628,6 +1635,8 @@ static int s3c_fb_resume(struct device *dev)
                 s3c_fb_set_par(win->fbinfo);
         }
 
+        pm_runtime_put_sync(sfb->dev);
+
         return 0;
 }
 #endif