linux-kernel - Aw: Re: Re: BUG: MTK DRM/HDMI broken on 5.13 (mt7623/bpi-r2)

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Message-ID: <trinity-ac304676-173c-42c6-837c-38e62971ede0-1625827104214@3c-app-gmx-bap43>
Date:   Fri, 9 Jul 2021 12:38:24 +0200
From:   Frank Wunderlich <frank-w@...lic-files.de>
To:     Enric Balletbo Serra <eballetbo@...il.com>
Cc:     CK Hu <ck.hu@...iatek.com>,
        Dafna Hirschfeld <dafna.hirschfeld@...labora.com>,
        chunkuang Hu <chunkuang.hu@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Collabora Kernel ML <kernel@...labora.com>
Subject: Aw: Re: Re: BUG: MTK DRM/HDMI broken on 5.13 (mt7623/bpi-r2)


> Gesendet: Freitag, 09. Juli 2021 um 12:24 Uhr
> Von: "Enric Balletbo Serra" <eballetbo@...il.com>
> If this is the offending commit, could you try if the following patch
> fixes the issue for you?
>
> https://git.kernel.org/pub/scm/linux/kernel/git/matthias.bgg/linux.git/commit/?h=v5.13-next/fixes&id=db39994e0bd852c6612a9709e63c09b98b161e00
>
> If not, and that patch is the offending commit, it probably means that
> the default routing table doesn't work for mt7623. Needs a specific
> soc table.

Hi Eric,

thanks for response, but it does not fix the issue for me. hdmi on mt7623 is DPI not DSI. There is already a mt7623 specific routing-table defined (one for DPI/HDMI and one for external=DSI/MIPI):

https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/mediatek/mtk_drm_drv.c#L74

maybe it can be included or compared with the "default" route?

regards Frank