Re: [PATCH v2 0/6] Enable HDMI support on Exynos platforms

[Tobias Jakobi <liquid.acid@gmx.net>]

Hello!

Marek Szyprowski wrote:
> Thanks for you tests and pointing this issue. I turned out that the
> initial fix proposed
> by Andrzej Hajda
> (http://www.spinics.net/lists/linux-samsung-soc/msg38915.html) worked
> fine, while the final version merged to clock fixes ('clk: samsung:
> exynos4: set parent
> of sclk_hdmiphy to hdmi' - commit
> df019a5c0f7083001cb694f44821ca506425bda2) doesn't work
> properly.
I should thank you for pushing all this code to mainline. It's really
nice to see how all the pieces now come together.


> Please check the following kernel tree - instead of hacking around hdmi
> clock I've added
> handling of it directly to drm mixer driver:
> https://git.linaro.org/people/marek.szyprowski/linux-srpol.git/shortlog/refs/heads/v3.19-odroid-hdmi
> 
> I hope that this will finally solve all mixer initialization related
> issues (also for
> Odroid XU3, discussed recently in the other thread). If it works fine, I
> will resend
> exynos4 hdmi patches to include this change.
I have picked the additional patches to my tree, which currently has a
bunch of other stuff in it, in particular v4 of the IOMMU series.

Anyway, now the 'modetest' application immediately crashes the system,
but I get a least something on the serial console:
http://www.math.uni-bielefeld.de/~tjakobi/archive/odroid_modetest_crash_sysmmu.txt

So this is probably due to the IOMMU. Please note that DRM IOMMU support
(CONFIG_DRM_EXYNOS_IOMMU) was disabled (!) in my config.
CONFIG_EXYNOS_IOMMU however was on.

I'm going to retest with the IOMMU series removed and
CONFIG_EXYNOS_IOMMU disabled as well.

Just posting this already since you're probably interested in these
'side-issues' as well.


With best wishes,
Tobias