From: yzq <yzq@rock-chips.com>
Date: Tue, 27 Sep 2011 02:00:40 +0000 (+0800)
Subject: rk29fb:fix bug : UI probabilistic display err when switch video
X-Git-Tag: firefly_0821_release~9766^2~51
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=52c004cef1b4213aa57a39961bed13cc0344ab0b;p=firefly-linux-kernel-4.4.55.git

rk29fb:fix bug : UI probabilistic display err when switch video
---

diff --git a/drivers/video/rk29_fb.c b/drivers/video/rk29_fb.c
index a05b3632e8f8..464331509405 100755
--- a/drivers/video/rk29_fb.c
+++ b/drivers/video/rk29_fb.c
@@ -257,6 +257,8 @@ struct platform_device *g_pdev = NULL;
 #else
 #define CHK_SUSPEND(inf)
 #endif
+static DECLARE_WAIT_QUEUE_HEAD(fb0_wait_queue);     
+static volatile int idle_condition = 1;              //1:idel, 0:busy
 
 static DECLARE_WAIT_QUEUE_HEAD(wq);
 static int wq_condition = 0;
@@ -1462,6 +1464,8 @@ static int fb0_set_par(struct fb_info *info)
 #endif
 
     fbprintk(">>>>>> %s : %s\n", __FILE__, __FUNCTION__);
+	wait_event_interruptible(fb0_wait_queue, idle_condition);
+	idle_condition = 0;
 
     inf->setFlag = 0;
 	CHK_SUSPEND(inf);
@@ -1591,6 +1595,8 @@ static int fb0_set_par(struct fb_info *info)
         win0_set_par(info);
     }
     inf->setFlag = 1;
+	idle_condition = 1;
+	wake_up_interruptible_sync(&fb0_wait_queue);
     return 0;
 }