On Sat, Sep 7, 2013 at 9:25 PM, David Herrmann <dh.herrmann@xxxxxxxxx> wrote:
> From dbfb8e12166d494cd60823cbe84134d5d1a73ec8 Mon Sep 17 00:00:00 2001
> From: David Herrmann <dh.herrmann@xxxxxxxxx>
> Date: Sat, 7 Sep 2013 14:22:01 +0200
> Subject: [PATCH] devm/simplefb: introduce and use devm_ioremap_wc()
>
> We want to use devm_ioremap_nocache() or even devm_ioremap_wc() to speed
> up fbdev writes _a lot_. As devm_ioremap_wc() doesn't exist, yet,
> introduce it along the way. Note that ioremap_wc() is aliases to
> ioremap_nocache() in asm-generic/{io,iomem}.h so we can safely expect all
> architectures to either provide it or use the same alias.
>
> Reported-by: Tom Gundersen <teg@xxxxxxx>
> Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxx>
> Cc: Stephen Warren <swarren@xxxxxxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Tried this on SHIELD, and it dramatically increases performance.
Tested-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
Alex.
--
To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
