[RFC PATCH 1/1] drm/exynos: Move platform drivers registration to module init

[Vivek Gautam]

Hi Javier, Kevin,



On Wed, Nov 19, 2014 at 10:22 PM, Javier Martinez Canillas
<javier.martinez at collabora.co.uk> wrote:
> [adding Paolo and Vivek as cc]
>
> Hello,
>
> On 11/18/2014 07:41 PM, Kevin Hilman wrote:
>>
>> It fixes the DRM deadlock, issue for me on exynos5800-peach-pi, but then
>> it proceeds to panic in the workqueue code called by the asoc max98090
>> codec[1].
>>
>> If I then disable CONFIG_SND_SOC_SNOW, I can get it to boot to a shell,
>> but I still don't have display output.
>>
>
> Paolo Pisati pointed out in another thread that he needed the patch
> "[PATCH v2 2/2] arm: dts: Exynos5: Use pmu_system_controller phandle for dp phy"
> is also needed to get display working for exynos on linux-next.
>
> I've pinged Kukjin to apply this as a -rc fix since is needed after
> a5ec598 ("phy: exynos-dp-video: Use syscon support to control pmu register")
> landed in 3.18 which broke the Exynos Display Port PHY:
>
> exynos-dp-video-phy 10040728.video-phy: Failed to lookup PMU regmap
>
> I've an Exynos5800 Peach Pi now so I wanted to test display on it. Just $subject
> and [0] should be enough to have display working on Peach Pi with linux-next but
> it fails to me with:
>
> exynos-mipi-video-phy 10040714.video-phy: can't request region for resource [mem 0x10040714-0x1004071f]
>
> The same issue was reported by Paolo a couple of days ago [1].
>
> Vivek,
>
> Any idea what could cause this regression on linux-next? As reported by Paolo this
> works well for me in 3.18-rc5.

I tested linux-next on Exynos5800 peach-pi board with linux-next and and the two
patches $Subject and [0].

Below is my git hash:
4d9e6ee drm/exynos: Move platform drivers registration to module init
4545ed4 POSTED: arm: dts: Exynos5: Use pmu_system_controller phandle for dp phy
36391a5 Add linux-next specific files for 20141119
9b1ced1 Merge branch 'akpm/master'
282497e mm: add strictlimit knob

With this display works for me.
Without $Subject patch i get lookup in drm.

Javier can you tell me your git hash. Was it on yesterday's linux-next ?

>
> Best regards,
> Javier
>
> [0]: https://lkml.org/lkml/2014/10/30/394
> [1]: http://www.spinics.net/lists/linux-samsung-soc/msg39032.html
> --
> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html



-- 
Best Regards
Vivek Gautam
Samsung R&D Institute, Bangalore
India