[PATCH] ARM: dts: remove display power domain for exynos5420

[Rahul Sharma]

Hi All,

Please review this patch.

Regards,
Rahul Sharma

On 9 June 2014 16:58, Rahul Sharma <rahul.sharma at samsung.com> wrote:
> Display domain is removed due to instability issues. Explaining
> the problem below:
>
> exynos_init_late triggers the pm_genpd_poweroff_unused which
> powers off the unused power domains. This call hits before
> the trigger to deferred probes.
>
> DRM DP Panel defers the probe due to supply get failure. By the
> time, deferred probe is scheduled again, Display Power Domain is
> powered off by pm_genpd_poweroff_unused.
>
> FIMD and DP drivers are accessing registers during Probe and Bind
> callbacks. If display domain is enabled/disabled around register
> accesses, display domain gets unstable and we are getting Power
> Domain Disable fail notification. Increasing the Timeout also
> didn't help.
>
> Signed-off-by: Rahul Sharma <rahul.sharma at samsung.com>
> ---
> based on Kukjin's for-next branch.
>
>  arch/arm/boot/dts/exynos5420.dtsi |    6 ------
>  1 file changed, 6 deletions(-)
>
> diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
> index e385322..3d528cf 100644
> --- a/arch/arm/boot/dts/exynos5420.dtsi
> +++ b/arch/arm/boot/dts/exynos5420.dtsi
> @@ -262,11 +262,6 @@
>                 reg = <0x10044060 0x20>;
>         };
>
> -       disp_pd: power-domain at 100440C0 {
> -               compatible = "samsung,exynos4210-pd";
> -               reg = <0x100440C0 0x20>;
> -       };
> -
>         msc_pd: power-domain at 10044120 {
>                 compatible = "samsung,exynos4210-pd";
>                 reg = <0x10044120 0x20>;
> @@ -518,7 +513,6 @@
>         };
>
>         fimd: fimd at 14400000 {
> -               samsung,power-domain = <&disp_pd>;
>                 clocks = <&clock CLK_SCLK_FIMD1>, <&clock CLK_FIMD1>;
>                 clock-names = "sclk_fimd", "fimd";
>         };
> --
> 1.7.9.5
>