linux-kernel - Aw: Re: [PATCH] soc: mediatek: mmsys: fix HDMI output on mt7623/bananapi-r2

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Date:   Mon, 12 Jul 2021 19:16:11 +0200
From:   Frank Wunderlich <frank-w@...lic-files.de>
To:     Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
Cc:     Frank Wunderlich <linux@...web.de>,
        linux-mediatek@...ts.infradead.org,
        Matthias Brugger <matthias.bgg@...il.com>,
        CK Hu <ck.hu@...iatek.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Enric Balletbo Serra <eballetbo@...il.com>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, Daniel Vetter <daniel@...ll.ch>
Subject: Aw: Re: [PATCH] soc: mediatek: mmsys: fix HDMI output on
 mt7623/bananapi-r2

Hi,

it turns out that problem is the read+or of the new value

i reverted my patch and changed

reg = readl_relaxed(mmsys->regs + routes[i].addr) | routes[i].val;
writel_relaxed(reg, mmsys->regs + routes[i].addr);

to

writel_relaxed(routes[i].val, mmsys->regs + routes[i].addr);

and it works too, but maybe it breaks other platforms

regards Frank