linux-kernel - Re: [PATCH] drm/exynos: dp: Fix panel and bridge lookup logic

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Date:	Mon, 8 Feb 2016 09:44:32 -0300
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	Marek Szyprowski <m.szyprowski@...sung.com>,
	linux-kernel@...r.kernel.org, Inki Dae <inki.dae@...sung.com>
Cc:	Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Seung-Woo Kim <sw0312.kim@...sung.com>,
	dri-devel@...ts.freedesktop.org, linux-samsung-soc@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Jingoo Han <jingoohan1@...il.com>,
	David Airlie <airlied@...ux.ie>,
	Joonyoung Shim <jy0922.shim@...sung.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] drm/exynos: dp: Fix panel and bridge lookup logic

Hello Marek,

On 02/08/2016 09:38 AM, Marek Szyprowski wrote:
> Hi Javier,
>
> On 2016-02-08 13:03, Javier Martinez Canillas wrote:
>> Hello Inki,
>>
>> On 01/29/2016 12:09 PM, Javier Martinez Canillas wrote:
>>> Commit a9fa852886fd ("drm/exynos: dp: add of_graph dt binding support
>>> for panel") made the Exynos DP DT binding more consistent since the OF
>>> graph could be used to lookup either a panel or a bridge device node.
>>>
>>> Before that commit, a panel would be looked up using a phandle and a
>>> bridge using the OF graph which made the DT binding not consistent.
>>>
>>> But the patch broke the later case since not finding a panel dev node
>>> would cause the driver's to do a probe deferral instead of attempting
>>> to lookup a bridge device node associated with the remote endpoint.
>>>
>>> So instead of returning a -EPROBE_DEFER if a panel is not found, check
>>> if there's a bridge and only do a probe deferral if both aren't found.
>>>
>>> Fixes: a9fa852886fd ("drm/exynos: dp: add of_graph dt binding support for panel")
>>> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
>>>
>>
>> Any comments about this patch? It is needed to have display working on
>> machines with a bridge chip again so it should be pushed to -rc ASAP.
>
> Please check v4.5-rc3, this patch is already merged there.
>

My bad, I was looking at v4.5-rc2 and Inki used to answer to patches
when he picks them so I thought he didn't have time to look at it yet.

Anyways, thanks a lot for pointing it out.
  
> Best regards

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