Hi,
On 24/10/2014 16:33, Soeren Moch wrote:
> 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 <sm...@web.de>
> ---
> Cc: Stefano Babic <sba...@denx.de>
> ---
> drivers/video/cfb_console.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/video/cfb_console.c b/drivers/video/cfb_console.c
> index 9231927..e7548e1 100644
> --- a/drivers/video/cfb_console.c
> +++ b/drivers/video/cfb_console.c
> @@ -1160,10 +1160,19 @@ void video_putc(struct stdio_dev *dev, const char c)
>
> 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);
> + }
> }
Sure it makes sense that the video is updated only once.
Acked-by: Stefano Babic <sba...@denx.de>
Best regards,
Stefano Babic
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