[PATCH 4/4] ARM: PXA: PXAFB: don't disable controller on cpufreq transition if overlay is in use

[Eric Miao]

Applied.

On Fri, Mar 11, 2011 at 5:20 PM, Vasily Khoruzhick <anarsoul at gmail.com> wrote:
> It's not safe to disable controller if overlay(s) is enabled (results in
> system hang). So we avoid to disable controller in this case. Userspace
> should choose proper governor to avoid freq changing when overlay is in
> use, otherwise LCD may blink.
>
> Signed-off-by: Vasily Khoruzhick <anarsoul at gmail.com>
> ---
>  drivers/video/pxafb.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
> index a3bdcc1..a2e5b51 100644
> --- a/drivers/video/pxafb.c
> +++ b/drivers/video/pxafb.c
> @@ -1648,7 +1648,8 @@ pxafb_freq_transition(struct notifier_block *nb, unsigned long val, void *data)
>
>        switch (val) {
>        case CPUFREQ_PRECHANGE:
> -               set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
> +               if (!fbi->overlay[0].usage && !fbi->overlay[1].usage)
> +                       set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
>                break;
>
>        case CPUFREQ_POSTCHANGE:
> --
> 1.7.4.1
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>