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authorSoeren Moch <smoch@web.de>2014-10-24 16:33:30 +0200
committerAnatolij Gustschin <agust@denx.de>2014-10-30 21:45:25 +0100
commitd37e96ecb9886714e0b5e167a91404cde8351b19 (patch)
tree7167d4347f996465c529cd757612ad110cc2d455
parent571bdf16a78e9e116a93d46f4809c4f8a3f2adb6 (diff)
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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>
-rw-r--r--drivers/video/cfb_console.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/video/cfb_console.c b/drivers/video/cfb_console.c
index 6aa50cb..a347e13 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);
+ }
}
/*