From: Soeren Moch <smoch@web.de>
Date: Fri, 24 Oct 2014 14:33:30 +0000 (+0200)
Subject: video: speedup writing strings to fb console
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=d37e96ecb9886714e0b5e167a91404cde8351b19;p=u-boot.git

video: speedup writing strings to fb console

With enabled framebuffer console the printenv command can take several
seconds to complete. This patch temporarily disables cache flush when
writing strings to fb console. Then there is no noticable delay anymore.

Tested with imx6 hdmi framebuffer.

Signed-off-by: Soeren Moch <smoch@web.de>
Acked-by: Stefano Babic <sbabic@denx.de>
---

diff --git a/drivers/video/cfb_console.c b/drivers/video/cfb_console.c
index 6aa50cb4f9..a347e13d7d 100644
--- a/drivers/video/cfb_console.c
+++ b/drivers/video/cfb_console.c
@@ -1160,10 +1160,19 @@ static void video_putc(struct stdio_dev *dev, const char c)
 
 static void video_puts(struct stdio_dev *dev, const char *s)
 {
+	int flush = cfb_do_flush_cache;
 	int count = strlen(s);
 
+	/* temporarily disable cache flush */
+	cfb_do_flush_cache = 0;
+
 	while (count--)
 		video_putc(dev, *s++);
+
+	if (flush) {
+		cfb_do_flush_cache = flush;
+		flush_cache(VIDEO_FB_ADRS, VIDEO_SIZE);
+	}
 }
 
 /*