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Bug#824435: please enable CONFIG_EXYNOS_VIDEO



On Mon, 2016-05-16 at 11:14 +0200, Steinar H. Gunderson wrote:
> On Mon, May 16, 2016 at 01:44:38AM +0100, Ben Hutchings wrote:
> > 
> > That has no useful effect, as it is a boolean option that only enables
> > a menu of further options.
> > 
> > Please explain what changes are really needed.
> Hm. I was trying to compile a kernel to verify this, but it took more than
> overnight to build the packages...
> 
> This is ODROID's XU4 4.2 tree config:
> 
> https://github.com/tobetter/linux/blob/39fb8734966df320584f8c186652cec831e90054/arch/arm/configs/odroidxu4_defconfig
> 
> On a guess, the relevant parts would probably be
> 
>   CONFIG_EXYNOS_VIDEO=m
>   CONFIG_EXYNOS_MIPI_DSI=m

That still won't work.

>   CONFIG_DRM_EXYNOS=m
>   CONFIG_DRM_EXYNOS_MIXER=y  [not in that config, but _HDMI depends on it]
>   CONFIG_DRM_EXYNOS_FIMD=y
>   CONFIG_DRM_EXYNOS_DSI=y
>   CONFIG_DRM_EXYNOS_DP=y
>   CONFIG_DRM_EXYNOS_HDMI=y
>   CONFIG_PHY_EXYNOS_MIPI_VIDEO=m
>   CONFIG_PHY_EXYNOS_DP_VIDEO=m

OK, I'll add these.

> There are also power management settings that I believe might be useful
> (not related to display):
> 
>   CONFIG_DEVFREQ_EVENT_EXYNOS_PPMU=y

We don't enable CONFIG_PM_DEVFREQ_EVENT yet so this won't work.

>   CONFIG_ARM_EXYNOS_CPUIDLE=y

OK.

> and I guess also
> 
>   CONFIG_EXYNOS_ADC=m

OK.

> I can try compiling a kernel with all of those set and see if I get any more
> video, but if you have any tricks to make dpkg-buildpackage go faster
> for kernel builds, please let me know :-)

If you're changing the configuration, you'll need to use a cross-
compiler and/or ccache.

Ben.

-- 
Ben Hutchings
73.46% of all statistics are made up.

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