linux-kernel - Re: [PATCH 4/7] drm/exynos/hdmi: add bridge support

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Message-id: <58919994.3060100@samsung.com>
Date:   Wed, 01 Feb 2017 17:17:24 +0900
From:   Inki Dae <inki.dae@...sung.com>
To:     Andrzej Hajda <a.hajda@...sung.com>,
        dri-devel@...ts.freedesktop.org,
        Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH 4/7] drm/exynos/hdmi: add bridge support



2017년 02월 01일 17:12에 Andrzej Hajda 이(가) 쓴 글:
> On 01.02.2017 08:44, Inki Dae wrote:
>>
>> 2017년 02월 01일 16:34에 Andrzej Hajda 이(가) 쓴 글:
>>> On 01.02.2017 08:31, Inki Dae wrote:
>>>> 2017년 01월 20일 15:52에 Andrzej Hajda 이(가) 쓴 글:
>>>>> In some platforms there is attached another device to the end of HDMI.
>>>>> The patch adds support for it.
>>>> Andrzej, can you clarify what bridge device can be attached and actually is now attached to the end of HDMI?
>>>> And I wonder if we have the device tree file which defines the bridge device in mainline. Seems we have no the device tree file.
>>>>
>>>> If nothing, then this patch should be merged with real use case.
>>> SiI8620 MHL bridge in tm2/tm2e.
>> Did you post dt patch to add the properties related to SiI8620 MHL bridge device?
>>
>> I see below patch series,
>> [PATCH 00/24] drm/bridge/sii8620: add Ultra HD modes support
>>
>> but I couldn't find dt patch for it. And specifying SiI8620 MHL bridge device as description would be needed.
>>
>> Thanks.
>>
>>
> 
> Patch adding HDMI path to tm2(e) including SiI8620 node and OF bindings
> between hdmi and SiI8620 [1].

Oops, you already CCed me. I didn't check it. Sorry.

> As the bridge framework in lower modes was used only to eliminate
> unsupported modes, support for bridge in exynos_hdmi driver was not
> critical, HDMI path worked well and I forgot about it.
> But for UltraHD modes it is required as SiI8620 uses bridge framework to
> gather info about applied video mode to program registers accordingly.
> I will add requested description to this patch.

Thanks.

> 
> [1]: http://www.spinics.net/lists/devicetree/msg157892.html
> 
> Regards
> Andrzej
> 
>