Re: [PATCH v2 1/2] clk: samsung: exynos5250: Add DISP1 clocks

[Javier Martinez Canillas <javier@osg.samsung.com>]

Hello Krzysztof,

On 10/17/2015 10:53 AM, Krzysztof Kozlowski wrote:
> 2015-10-17 8:41 GMT+09:00 Kukjin Kim <kgene@kernel.org>:

[snip]

>>>
>> So...how can I take 2nd patch of this series in samsung(arm-soc) tree?
>> And this series shouldn't be for fixes for 4.3?...Mike how do you think?
> 
> Stephen acked it so I thought everything will go through samsung-soc.
> 
> Dear Kukjin,
> Indeed this can go as fix for current cycle... but in the same time
> this does not fix any specific regression. Tomeu did not describe when
> issue happened for the first time so I assumed it was like that
> always. It's up to you.
>

Sorry for not answering about this series before but I've been in contact
with Tomeu over IRC before he posted it and since you already added your
Reviewed-by tag, I didn't feel the need do to it.

This is a regression for 4.3 since S2R was working correctly for 4.2 in
Snow, I tested after fixing resume with commit 6fd4899a54a5 ("irqchip:
exynos-combiner: Save IRQ enable set on suspend") and the display was
always enabled on resume.

I don't have access to a Snow anymore to bisect but I think the regression
was introduced by some of the changes in 4.3 to migrate the Exynos DRM to
Atomic Mode Settings. But probably that just exposed a latent bug and it
was working out of luck since I had the same issue than Tomeu in Exynos5420
and was fixed in the same way with commits:

885601002998 ("clk: exynos5420: Add IDs for clocks used in DISP1 power domain")
ea08de16eb1b ("ARM: dts: Add DISP1 power domain for exynos5420")

> Both patches (with Stephen's ack) are in my recent pull request but as
> usual feel free to cherry pick. I'll drop them from next branch then.
> 
> Best regards,
> Krzysztof
> --

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America