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Date: Mon, 6 May 2024 16:18:24 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Michael Walle <mwalle@...nel.org>,
 Alexandre Mergnat <amergnat@...libre.com>, chunkuang.hu@...nel.org
Cc: robh@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
 p.zabel@...gutronix.de, airlied@...il.com, daniel@...ll.ch,
 maarten.lankhorst@...ux.intel.com, mripard@...nel.org, tzimmermann@...e.de,
 matthias.bgg@...il.com, shawn.sung@...iatek.com, yu-chang.lee@...iatek.com,
 ck.hu@...iatek.com, jitao.shi@...iatek.com, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 linux-mediatek@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
 wenst@...omium.org, kernel@...labora.com
Subject: Re: [PATCH v2 0/3] drm/mediatek: Add support for OF graphs

Il 06/05/24 15:17, Michael Walle ha scritto:
> Hi Angelo,
> 
> On Mon May 6, 2024 at 1:22 PM CEST, AngeloGioacchino Del Regno wrote:
>>> The problem with this is that you need DDP_COMPONENT_DRM_OVL_ADAPTOR... which is
>>> a software thing and not HW, so that can't be described in devicetree.
>>>
>>> The only thing this series won't deal with is exactly that.
>>
>> Sorry, no, I got confused.
>>
>> The series *does* already deal with that, as the pipeline is built before the check
>> for OVL_ADAPTOR components, so that will get probed.
> 
> Are you sure? Because who is actually adding the OVL_ADAPTOR to the
> path? It looks like your patch will walk the graph and add all the
> components according to their compatible string. And since the
> OVL_ADAPTOR is virtual and doesn't have a node..
> 

I shouldn't look at code while having a flu.

	if (mtk_drm_find_mmsys_comp(private, DDP_COMPONENT_DRM_OVL_ADAPTOR)) {

..but yes nothing adds the mmsys_comp for OVL_ADAPTOR.

Needs to be addressed, will do that asap.

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