linux-kernel - Re: [RFC][PATCH v3] DRM: add DRM Driver for Samsung SoC EXYNOS4210.

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Date:	Thu, 1 Sep 2011 20:08:14 -0500
From:	Rob Clark <robdclark@...il.com>
To:	Kyungmin Park <kmpark@...radead.org>
Cc:	Inki Dae <inki.dae@...sung.com>, airlied@...ux.ie,
	sw0312.kim@...sung.com, linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC][PATCH v3] DRM: add DRM Driver for Samsung SoC EXYNOS4210.

On Thu, Sep 1, 2011 at 8:02 PM, Kyungmin Park <kmpark@...radead.org> wrote:
>>> Just thinking hypothetically.. what if some future device had two hdmi
>>> controllers.  Then you'd want two instances of the same display
>>> object.
>>>
>>> Although it seems this API is just internal to the DRM driver (which I
>>> had not realized earlier), so it should be pretty easy to change later
>>> if needed.
>>>
>>
>> You are right. I guess we should consider multiple instances to display
>> object because the Exynos hardware has two display controllers and also each
>> display controller needs one display panel with sharing same driver. thank
>> you for your pointing. :)
>
> Two HDMI and two FIMD is different. even though exynos4 supports the
> two display controller. it has only one HDMI port and now there's no
> device to use it. Of course if new device uses it. it will support it.
> I mena currently make it simple and make it TODO list.

yeah.. since it is just an API internal to the driver, and not
external (as I initially mistakenly thought), I don't think it is an
immediate issue.  It should be easy enough to change later if you, for
example, later had hw w/ two HDMI ports.

BR,
-R

> Thank you,
> Kyungmin Park
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