From: chenli <chenli@rock-chips.com>
Date: Mon, 19 Sep 2011 10:24:55 +0000 (+0800)
Subject: rk29-ipp:use dsb() only after we start ipp
X-Git-Tag: firefly_0821_release~9767^2~25^2~2
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=72ece66e12d2296998934cc55fcce0ff4f772b8b;p=firefly-linux-kernel-4.4.55.git

rk29-ipp:use dsb() only after we start ipp
---

diff --git a/drivers/staging/rk29/ipp/rk29-ipp.c b/drivers/staging/rk29/ipp/rk29-ipp.c
index 455b4da9c272..d8903cbdf2f1 100755
--- a/drivers/staging/rk29/ipp/rk29-ipp.c
+++ b/drivers/staging/rk29/ipp/rk29-ipp.c
@@ -139,7 +139,6 @@ struct ipp_context
 static inline void ipp_write( uint32_t b, uint32_t r)
 {
 	__raw_writel(b, drvdata->ipp_base + r);
-	dsb();
 }
 
 static inline uint32_t ipp_read( uint32_t r)
@@ -888,6 +887,8 @@ int ipp_blit(const struct rk29_ipp_req *req)
 	ipp_write(8, IPP_INT);		
 
 	ipp_write(1, IPP_PROCESS_ST);
+
+	dsb();
 	dmac_clean_range(drvdata->ipp_base,drvdata->ipp_base+0x54);
 #ifdef IPP_TEST
 	hw_start = ktime_get();