[PATCH 0/7] add atomic_check callback to exynos_crtc

[Krzysztof Kozlowski]

On 28.10.2015 14:30, Inki Dae wrote:
> 
> 
> 2015년 10월 28일 10:37에 Krzysztof Kozlowski 이(가) 쓴 글:
>> On 26.10.2015 21:03, Andrzej Hajda wrote:
>>> Hi Inki,
>>>
>>> This patchset removes hacky mode validation in Mixer driver by adding
>>> atomic_check callback to exynos_crtc and replacing direct function call
>>> with DRM framework validation. As a result HDMI driver does not depend anymore
>>> on MIXER driver and both drivers can be selected with different Kconfig options,
>>> it is usefull especially for latests SoCs which do have HDMI IP but do not have
>>> MIXER IP.
>>> Additionally patchset performs small Kconfig refactoring.
>>>
>>> Krzysztof could you look at exynos_defconfig patch. Maybe it would be good
>>> to merge it before next patch to allow full bi-sectability :)
>>
>> I would be happy to see similar for multi_v7. HDMI is already there.
>>
>> I also wonder why actually DRM_EXYNOS_HDMI has to depend on MIXER or DECON?
> 
> DECON controller has two kinds of data paths in case of Exynos5433 or later.
> One is Display path and other is TV path. So it'd be reasonable for DRM_EXYNOS_HDMI to depend on MIXER or DECON -
> TV path of DECON controller transfers Display data to HDMI like MIXER IP of previous Exynos SoC did.

So this is not a build-time dependency but rather runtime? What will
happen if HDMI is compiled and enabled (for example in DTB) but there
will be no DECON nor MIXER compiled in?

Best regards,
Krzysztof