linux-kernel - Re: [PATCH] drm/mediatek: ensure bridge disable happends before suspend

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Message-ID: <e405bbc2-c1af-f445-5b78-021b8e88090a@collabora.com>
Date:   Mon, 4 Jul 2022 13:44:52 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Hsin-Yi Wang <hsinyi@...omium.org>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc:     Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/mediatek: ensure bridge disable happends before
 suspend

Il 29/06/22 21:05, Hsin-Yi Wang ha scritto:
> Make sure bridge_disable will be called before suspend by calling
> drm_mode_config_helper_suspend() in .prepare callback.
> 
> Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
> Reviewed-by: CK Hu <ck.hu@...iatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

> ---
> The issue is found if suspend is called via VT2 in several MTK SoC (eg.
> MT8173, MT8183, MT8186) chromebook boards with eDP bridge:
> bridge disable is called through mtk-drm's suspend, and it needs to be
> called before bridge pm runtime suspend.
> So we move the hook to .prepare() and .complete().
> ---
>   drivers/gpu/drm/mediatek/mtk_drm_drv.c | 16 ++++++++--------
>   1 file changed, 8 insertions(+), 8 deletions(-)
>