linux-kernel - Re: [PATCH] drm: mediatek: Fix display vblank timeout when disable dsi

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Date:   Wed, 14 Sep 2022 10:17:36 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     xinlei.lee@...iatek.com, chunkuang.hu@...nel.org,
        p.zabel@...gutronix.de, airlied@...ux.ie, daniel@...ll.ch,
        matthias.bgg@...il.com, jitao.shi@...iatek.com
Cc:     rex-bc.chen@...iatek.com, dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH] drm: mediatek: Fix display vblank timeout when disable
 dsi

Il 14/09/22 08:18, xinlei.lee@...iatek.com ha scritto:
> From: Xinlei Lee <xinlei.lee@...iatek.com>
> 
> Dsi is turned off at bridge.disable, causing crtc to wait for vblank timeout.
> It is necessary to add count protection to turn off dsi, and turn off at post_disable.
> 
> Fixes: cde7e2e35c28 ("drm/mediatek: Separate poweron/poweroff from enable/disable and define new funcs")
> Signed-off-by: Xinlei Lee <xinlei.lee@...iatek.com>

Hello Xinlei,
which machine is this commit targeting?

Can you please try to reproduce again the issue that you're seeing with my
mtk_dsi fix [1], but without this commit?

Thanks,
Angelo

[1]: 
https://patchwork.kernel.org/project/linux-mediatek/patch/20220721172727.14624-1-angelogioacchino.delregno@collabora.com/